The USGS has published reports and journal articles on a large number of topics related to the Chesapeake Bay and its watershed. Some recent reports are online. Findings from the publications are used by Chesapeake Bay Program resource managers and policy makers to make science-based decisions for ecosystem conservation and restoration. USGS Chesapeake Bay science information is also critical for the restoration of ecosystems throughout the United States.

FY 2008

Alvarez, David A., Cranor, Walter L., Perkins, Stephanie D., Schroeder, Vickie L., Werner, Stephen L., Furlong, Edward T., Kain, Donald, and Brent, Robert, 2008, Reconnaissance of Persistent and Emerging Contaminants in the Shenandoah and James River Basins, Virginia, During Spring of 2007, U.S. Geological Survey Open-File Report 2008-1231 30 p.

Alvarez, David A., Cranor, Walter L., Perkins, Stephanie D., Schroeder, Vickie L., Werner, Stephen L., Furlong, Edward T., and Holmes, John, 2008, Investigation of Organic Chemicals Potentially Responsible for Mortality and Intersex in Fish of the North Fork of the Shenandoah River, Virginia, during Spring of 2007, U.S. Geological Survey Open-File Report 2008-1093, 24 p.

Blazer, V. S., Iwanowicz, L. R., Iwanowicz, D. D., Smith, D. R., Young, J. A., Hedrick, J. D., Foster, S. W., and Reeser, S. J., 2008, Intersex (Testicular Oocytes) in Smallmouth Bass from the Potomac River and Selected Nearby Drainages American Fisheries Society Online Journal, Vol 19, Issue 4, pp. 242-253.

Blazer, V., Ripley, J., Iwanowicz, L., Foran, C., 2008, Utilization of Protein Expression Profiles as Indicators of Environmental Impairment of Smallmouth Bass (Micropterus Dolomieu) from the Shenandoah River, Virginia, USA Environment Toxicology and Chemistry (SETAC), Vol. 27, No. 8, pp 1756-1767.

Newell, Wayne L., and Clark, Inga, 2008, Geomorphic Map of Worcester County, Maryland, Interpreted from a LIDAR-Based, Digital Elevation Model, U.S. Geological Survey, Open-File Report 2008-1005 34 p.

Phillips, S.W., Ator, S.W., Blazer, V.S., Brakebill, J.W., Cahoon, D.R., Claggett, P.R., Cronin, T.M., Denver, J.M., Densmore, C.L., Gellis, A.C., Hupp, C.R., Landwehr, J.M., Langland, M.J., Ottinger, C.A., Pavich, M.J., Perry, M.C., Preston, S.D., Raffensperger, J.P., Rattner, B.A., Rybicki, N.B., and Willard, D.A., 2007, Synthesis of U.S. Geological Survey Science for the Chesapeake Bay Ecosystem and Implications for Environmental Management, U.S. Geological Survey Circular 1316

Rattner, B.A., Golden, N.H., Toschik, P.C., McGowan, P.C., and Custer,T.W., 2008, Concentrations of metals in blood and feathers of nestling ospreys (Pandion haliaetus) in Chesapeake and Delaware Bays Archives of Environmental Contamination and Toxicology 54:114-122.

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FY 2007

Baldizar, J. and Rybicki, N. B., 2007, Restoration Potential of Submerged Aquatic Vegetation in the Tidal Pocomoke River (Chesapeake Bay, USA), Ecological Restoration, vol. 25, no. 2, p. 138-139.

B鰄lke, J.K., O'Connell, M.E., and Prestegaard, K.L., 2007, Ground-water stratification and delivery of nitrate to an incised stream in varying flow conditions: Journal of Environmental Quality, v. 36, p. 664-680.

Cronin, T.M., Vogt, P.R., Williard, D.A., Thunell, R., Halka, J., Berke, M., 2007, Rapid sea level rise and ice sheet response to a 8,200-year climate event, Geophyiscal Research Letters, AGU, Vol 34, 6 p.

Doheny, E.J., Starsoneck, R.J., Mayer, P.M., and Striz, E.A., Pre-Restoration Geomorphic Characteristics of Minebank Run, Baltimore County, Maryland, 2002�, U.S. Geological Survey Scientific Investigations Report 2007-5127

Haramis, G.M., and G.D. Kearns, 2007, Soras in tidal marsh: banding and telemetry studies on the Patuxent River, Maryland, Waterbirds 30 (Special Publication 1): 105-121.

Haramis, G.M., and Kearns, G.D., 2007, Herbivory by resident Canada geese: The loss and restoration of wild rice along the tidal Patuxent River, Maryland: Journal of Wildlife Management, v. 71, p. 788�4.

Kozar, Mark D., McCoy, Kurt J., Weary, David J., Field, Malcolm S., Pierce, Herbert A., Schill, William Bane, and Young, John A., 2007, Hydrogeology and Water Quality of the Leetown Area, West Virginia U.S. Geological Survey, Open-File Report 2007-1358, 109 p.

Kozar, M.D., Weary, D.J., Paybins, K.S., and Pierce, H.A., 2007, Hydrogeologic setting and ground-water flow in the Leetown Area, West Virginia: U.S. Geological Survey Scientific Investigations Report 2007-5066, 70 p.

Langland M.J., Moyer, Douglas L., Blomquist Joel, Changes in Streamflow, Concentrations, and Loads in Selected Nontidal Basins in the Chesapeake Bay Watershed, 1985-2006, U.S. Geological Survey Open-File Report 2007-1372

McCoy, K.J., and Kozar, M.D., 2007, Use of sinkhole and specific capacity distributions to assess vertical gradients in a karst aquifer: Environmental Geology, 15 p, accessed 1-23-08 at http://www.springerlink.com/content/b231067245x58643/?p=bd557274c6bf43c085284ee63cc669d8&pi=9.

Noe, G.B., and Hupp, C.R. 2007, Seasonal variation in nutrient retention during inundation of of a short-hydroperiod floodplain, River Research and Applications 23: 1088-1101

Phillips, P.J., Ator, S.W., and Nystrom, E.A., 2007, Temporal changes in surface-water insecticide after the phaseout of diazinon and chlorpyrifos: Environmental Science and Technology, v. 41, no. 12, p. 4,246�251.

Rice, K.C., Deviney, F.A., and Olson, G., 2007, Acid rain in Shenandoah National Park, Virginia: USGS Fact Sheet 2007-3057, 4 p. (on-line at http://pubs.usgs.gov/fs/2007/3057/)

Rybicki, N. B. , Yoon, S. N., Schenk, E. R., and Baldizar, J. B., 2007, The Distribution of Submersed Aquatic Vegetation in the Fresh and Oligohaline Tidal Potomac River, 2004, U.S. Geological Survey 2007-1198, available online only.

Rybicki, Nancy B., Landwehr, Jurate M., 2007, Long-term changes in abundance and diversity of macrophyte and waterfowl populations in an estuary with exotic macrophytes and improving water quality: Limnology and Oceanography, v 52, no. 3, p. 1195-1207

USGS, 2007, Scientific Contributions of the U.S. Geological Survey to Enhance the Management of Agricultural Landscapes: U.S Geological Survey Fact Sheet FS 2007/3001, 6 pp.

Willard, D., Cronin, Thomas M., Paleoecology and ecosystem restoration: case studies from Chesapeake Bay and the Florida Everglades http://chesapeake.usgs.gov/pdfs/Willard_Cronin2007Frontiers.pdf p. 491-498.

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FY 2006

Baldizar, J.B., and Rybicki, N.B., 2006, Primary factors influencing water clarity at shallow water sites throughout the Chesapeake and Maryland Coastal Bays, in Proceedings of the Joint 8th Federal Interagency Sedimentation Conference and 3rd Federal Interagency Hydrologic Modeling Conference, April 2� 2006, Reno, Nevada, in CD-ROM file ISBN 0-9779007-1-1.

Baldizar, J. M. and Rybicki, N. B., 2006, Primary factors influencing water clarity at shallow water sites throughout the Chesapeake and Maryland Coastal Bays. Subcommittee on Sedimentation, 2006. Proceedings of the Federal Interagency Sedimentation Conferences, 1947 to 2006.

Chambers, Douglas B., and Leiker, Thomas J., 2006, A Reconnaissance for Emerging Contaminants in the South Branch Potomac River, Cacapon River, and Williams River Basins, West Virginia, April-October 2004, U.S. Geological Survey Open-File Report 2006-1393, 28 pages

Cronin, T.M., and Walker, H.A., 2006, Restoring Coastal Ecosystems and Abrupt Climate Change, An Editorial Essay, 8 p. http://www.springerlink.com/content/e8u730587rk5216u/?p=34a787db113c417aad7173287f82f798&pi=0

Denver, Judith M., and Ator, Scott W., 2006, Pesticides in Ground Water of the Maryland Coastal Plain, U.S. Geological Survey Fact Sheet FS 2006-3119, 24 p.

Deviney, F.A., Jr., Rice, K.C., and Hornberger, G.M., 2006, Time series and recurrence interval models to predict the vulnerability of streams to episodic acidification in Shenandoah National Park, Virginia: Water Resources Research, 42, W09405, doi:10.1029/2005WR004740

Doheny, E.J., Starsoneck, R.J., 2006, Watershed Characteristics and Pre-Restoration Surface-Water Hydrology of Minebank Run, Baltimore County, Maryland, Water Years 2002-04, U.S. Geological Survey Scientific Investigations Report 2006-5179

Gellis, A.C. and Landwehr, J.M., 2006, Identifying sources of fine-grained suspended-sediment in the Pocomoke River, an Eastern Shore tributary to the Chesapeake Bay: Proceedings of the Joint Federal Interagency Conference 2006, 8th Federal Interagency Sedimentation Conference, April 2-6, 2006, Reno, NV, Paper 5C-1 in CD_ROM file ISBN 0-9779007-1-1

Gilliom, R.J., Barbash, J.E., Crawford, C.G., Hamilton, P.A., Martin, J.D., Nakagaki, Naomi, Nowell, L.H., Scott, J.C., Stackelberg, P.E., Thelin, G.P., and Wolock, D.M., 2006, Pesticides in the Nation抯 streams and ground water, 1992�01: U.S. Geological Survey Circular 1291, 172 p.

Hammerschlag, R.S., Baldwin, A.H., Krafft, C.C., Paul, M.M., Brittingham, K.D., Rusello, K., and Hatfield, J.S., 2006, Final Report桭ive years of monitoring reconstructed freshwater tidal wetlands in the Urban Anacostia River, accessed June 6, 2007, at http://www.pwrc.usgs.gov/resshow/hammerschlag/anacostia.cfm.

Langland M.J., Raffensperger, Moyer, D.L., Landwehr, J.M., and Schwartz, 2006, Changes in Streamflow and Water Quality in Selected Nontidal Basins in the Chesapeake Bay Watershed, 1985-2004, U.S. Geological Scientific Investigations Report 2006-5178

Lindsey, B.D., Falls, W.F., 2006, Factors Affecting Occurrence and Distribution of Selected Contaminants in Ground Water From Selected Areas in the Piedmont Aquifer System, Eastern United States, 1993-2003, U.S. Geological Survey Scientific Investigations Report 2006-5104

McCoy, K.J., and Kozar, M.D., 2006, Relation of chlorofluorocarbon age dates to water quality in aquifers of West Virginia: U.S. Geological Survey Scientific Investigations Report 2006-5221, 36 p.

Ottinger, C.A., and Jacobs, J.M., 2006, USGS/NOAA workshop on mycobacteriosis in striped bass, May 7�, 2006, Annapolis, Maryland: U.S. Geological Survey Scientific Investigations Report 2006�14, 42 p.

Phillips, S.W. 2006, U.S. Geological Survey Chesapeake Bay Studies: Scientific Solutions for a Healthy Bay and Watershed USGS Fact Sheet FS-2006-3046

Phillips, S.W., Lindsey, B.D., Preston, S.D., Brakebill, J.W., Raffensperger, J.P., and Shedlock, R.J., 2006, The influence of ground water and watershed processes on nutrient delivery to the Chesapeake Bay: [abs.] in Proceedings of the Joint Assembly, May 26�, 2006, Baltimore, Maryland.

Schenk, E. R. and N. B. Rybicki, 2006, Exploring causes of a seagrass transplant failure in the Potomac River (Virginia), Ecological Restoration v. 24, no. 2, p. 116-118

Saenger, C., Cronin, T., Thunell, R., and Vann, C., 2006, Modelling river discharge and precipitation from estuarine salinity in the northern Chesapeake Bay: application to Holocense palaeoclimate, The Holocense 16,4 (2006) pp. 1-11, http://hol.sagepub.com/cgi/content/abstract/16/4/467

Schwarz, G.E., Hoos, A.B., Alexander, R.B., and Smith, R.A., 2006, The SPARROW water-quality model: Theory, applications, and user documentation: U.S. Geological Survey Techniques and Methods 6B3, 248 p., CD-ROM.

Tilley, J., and Slonecker, T., 2006, Quantifying the components of impervious surfaces: U.S. Geological Survey Open-File Report 2007�08, 40 p.

U.S. Geological Survey, 2006, Fish consumption advisories for mercury, accessed June 5, 2007, at http://minerals.usgs.gov/mercury/advisories.html

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FY 2005

Ator, S.W., Denver, J.M., Krantz, D.E., Newell, W.L., and Martucci, S.K., 2005, A surficial hydrogeologic framework for the Mid-Atlantic Coastal Plain: U.S. Geological Survey Professional Paper 1680, 44 p., 4 pls.

Baldock, F.C., Blazer, V.S., Callinan, R.B., Hatai, K., Karunasagar, I., Mohan, C.V., and Bondad-Reantaso, M.G., 2005, Outcomes of a short expert consultation on epizootic ulcerative syndrome (EUS): Re-examination of causal factors, case definition and nomenclature, p. 553�6 in Diseases in Asian aquaculture V, Walker, P.J., Lester, R.G., and Bondad-Reantaso, M.G., eds.: Manila, Phillippines, Fish Health Section, Asian Fisheries Society, 633 p.

Blazer, V.S., Bondad-Reantaso, M.G., Callinan, R.B., Chinabut, S., Hatai, K., Lilley, J.H., and Mohan, C.V., 2005, Aphanomyces invadans (= A. piscicida): A serious pathogen of estuarine and freshwater fishes, p. 24� (chapter) in Health and Diseases of Aquatic Organisms: Bilateral Perspectives, Proceedings of the Second Bilateral Conference between Russia and the United States, Cipriano, R.C., Shchelkunov, I.S., and Faisal, M., eds.: East Lansing, Michigan, Michigan State University.

Cronin, T.M., Thunell, R., Dwyer, G.S., Saenger, C., Mann, M.E., Vann, C., and Seal, II, R.R., 2005, Multiproxy evidence of Holocene climate variability from estuarine sediments, eastern North America, Paleoceanograpy, Vol. 20 PA4006, doi: 10.1029/2005PA001145

Debrewer, Linda M., Ator, Scott W., and Denver, Judith M., 2005, Factors Affecting Spatial and Temporal Variability in Nutrient and Pesticide Concentrations in the Surficial Aquifer on the Delmarva Peninsula, Online Publication - SIR 2005-5257 56 p.

Gellis Allen C., Banks William S.L., Langland Michael J., and Martucci Sarah K., 2005, Summary of Suspended-Sediment Data for Streams Draining the Chesapeake Bay Watershed, Water Years 1952�02, Scientific Investigations Report 2004-5056

Government Accountability Office, 2005, Chesapeake Bay Program: Improved strategies are needed to better assess, report, and manage restoration progress: Washington, D.C., Government Accountability Office Report 06�, 88 p.

Grant, E.H.C., Jung, R.E., and Rice, K.C., 2005, Stream salamander species richness and abundance in relation to environmental factors in Shenandoah National Park: American Midland Naturalist, vol. 153, p. 348-356.

Kidwell, D.M., and Perry, M.C., 2005, Delineation of surf scoter habitat in Chesapeake Bay, Maryland: Macrobenthic and sediment composition of surf scoter feeding sites, [abs.] in Perry, M.C., Second North American Sea Duck Conference, November 7�, 2005, Annapolis, Maryland, Program and Abstracts, USGS Patuxent Wildlife Research Center, Maryland, 123 p. (p. 91).

Landwehr, J.M., 2005, Determining the 揃est� model for explaining water clarity variation during SAV seasons within the tidal tributary rivers of the Chesapeake Bay watershed, [abs] in the Proceedings of Estuarine Research Federation Meeting, October 16�, 2005, Norfolk, Virginia.

Martucci, Sarah K., Krstolic, Jennifer L., Raffensperger, Jeff P. (U.S. Geological Survey), Hopkins, Katharine J.(University of Maryland Center for Environmental Science), 24p. Development of Land Segmentation, Stream-Reach Network, and Watersheds in Support of Hydrological Simulation Program朏ortran (HSPF) Modeling, Chesapeake Bay Watershed, and Adjacent Parts of Maryland, Delaware, and Virginia, Online Publication - SIR 2005-5073

McCoy, Kurt J., Podwysocki, Melvin H., Crider, E. Allen, and Weary, David, J., 2005, Fracture trace map and single-well aquifer test results in a carbonate aquifer in Berkeley County, West Virginia: U.S. Geological Survey Open-File Report 2005-1040, 1 Plate.

McCoy, Kurt J., Podwysocki, Melvin H., Crider, E. Allen, and Weary, David, J., 2005, Fracture trace map and single-well aquifer test results in a carbonate aquifer in Jefferson County, West Virginia: U.S. Geological Survey Open-File Report 2005-1407, 1 Plate.

Neff, K., and Baldwin, A., 2005, Seed dispersal into wetlands: Techniques and results for a restored tidal freshwater marsh: Wetlands, v. 25, no. 2, p. 392�4.

Niven, D.K., Sauer, J.R., and Butcher, G.S., 2005, Population trends of North American sea ducks based on Christmas bird count and Breeding Bird Survey data, [abs.] in Perry, M.C., 2005, Second North American Sea Duck Conference, November 7�, 2005, Annapolis, Maryland, Program and Abstracts, USGS Patuxent Wildlife Research Center, Md., 123 p. (p. 101)

Noe, Gregory, B., Hupp, Cliff, R., 2005, Carbon, Nitrogen, and Phosphorus Accumulation in Floodplains of Atlantic Coastal Plain Rivers: ESA Journals Online

Ottinger, C.A., Blazer, V.S., Densmore, C.L., Gauthier, D.T., Kator, H., Panek, F.M., Rhodes, M.W., and Vogelbein, W., 2005, Mycobacteriosis in Chesapeake Bay striped bass (Morone saxatilis), p. 238�3 in Health and Diseases of Aquatic Organisms: Bilateral Perspectives, Proceedings of the Second Bilateral Conference between Russia and the United States, Cipriano, R.C., Shchelkunov, I.S., and Faisal, M., eds.: East Lansing, Michigan, Michigan State University.

Perry, M.C., Osenton, P.C., Wells-Berlin, A.M., and Kidwell, D.M., 2005, Food selection among Atlantic Coast sea ducks in relation to historic food habits, [abs.] in Perry, M.C., Second North American Sea Duck Conference, November 7�, 2005, Annapolis, Maryland, Program and Abstracts, USGS Patuxent Wildlife Research Center, Maryland, 123 p. (p. 105).

Rattner, B.A., Eisenreich, K.M., Golden, N.H., McKernan, M.A., Hothem, R.L., and Custer, T.W., 2005, Retrospective ecotoxicological data and current information needs for terrestrial vertebrates residing in coastal habitat of the United States: Archives of Environmental Contamination and Toxicology, v. 49, no. 2, p. 257�5.

Reuter, J.M., Bierman, P.R., and Pavich, M.J., 2005, Using GIS to select drainage basins for sampling: An example from a cosmogenic 10Be study of erosion rates within the Susquehanna River Basin: Geological Society of America Abstracts with Programs, v. 37, no. 1, 32 p.

Rice, K.C., Deviney, Jr., F.A., Hornberger, G.M., and Webb, J.R., 2005, Predicting the vulnerability of streams to episodic acidification and potential effects on aquatic biota in Shenandoah National Park, Virginia: USGS Scientific Investigations Report 2005-5259, 51 p. (on-line at http://pubs.usgs.gov/sir/2005/5259/

Rice, K.C., Monti, M.M., and Ettinger, M.R., 2005, Water-quality data from ground- and surface-water sites near concentrated animal feeding operations (CAFOs) and non-CAFOs in the Shenandoah Valley and Eastern Shore of Virginia, January � February 2004: USGS Open-File Report 2005-1388, 78 p. (on-line at http://pubs.water.usgs.gov/ofr2005-1388/)

Rhodes, M.W., Kator, H., McNabb, A., Deshayes, C., Reyrat, J., Brown-Elliott, B.A., Wallace, R., Jr., Trott, K.A., Parker, J.M., Lifland, B., Osterhout, G., Kaattari, I., Reece, K., Vogelbein, W., and Ottinger, C.A., 2005, Mycobacterium pseudoshottsii sp. nov., a slowly growing chromogenic species isolated from Chesapeake Bay striped bass (Morone saxatilis): International Journal of Systematic and Evolutionary Microbiology, v. 55, p. 1,139�147.

Scudlark, J.R., Rice, K.C., Conko, K.M., Bricker, O.P., and Church, T.M., 2005, Transmission of atmospherically derived trace elements through an undeveloped, forested Maryland watershed: Water, Air, and Soil Pollution, v. 163, no. 1-4, p. 53-79, DOI: 10.1007/s11270-005-8135-5.

Simon, N.S., 2005, Loosely Bound Oxytetracycline in Riverine Sediments from Two Tributaries of the Chesapeake Bay, ACS, Environ. Sci. Technol., 39 (10), Web Release Date: April 9, 2005

Vasquez, E.A., Glenn, E.P., Brown, J.J., Guntenspergen, G.R., and Nelson, S.G., 2005, Salt tolerance underlies the cryptic invasion of North American salt marshes by an introduced haplotype of the common reed Phragmites australis (Poaceae): Marine Ecology Progress Series, v. 298, p. 1�

Walling, D.W., 2005, Tracing suspended sediment sources in catchments and river systems: Science of the Total Environment, v. 344, p. 159�4.

Willard, D.A., Bernhardt, C.E., Korejwo, D.A., Meyers, S.R., 2005. Impact of millennial-scale Holocene climate variability on eastern North American terrestrial ecosystems: pollen-based climatic reconstruction. Global and Planetary Change 47: 17-35.

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FY 2004

Ator, Scott W. , Denver, Judith M. , and Brayton, Michael J. Brayton, 2004, Hydrologic and Geochemical Controls on Pesticide and Nutrient Transport to Two Streams on the Delmarva Peninsula: Online Publication - SIR 2004-5051

Brakebill, John W., and Preston, Stephen D., 2004, Digital Data Used to Relate Nutrient Inputs to Water Quality in the Chesapeake Bay Watershed, Version 3.0: U.S. Geological Survey online publication, OFR-2004-1433, 20p.

Claggett, P.R., and Bisland, C., 2004, Assessing the vulnerability of forests and farmlands to development in the Chesapeake Bay Watershed, in Proceedings of the IASTED International Conference on Environmental Modeling and Simulation, November 22�, 2004, St. Thomas, U.S. Virgin Islands.

Clark, Robert G., Kambly, Steven, Moreland, Thomas, Pavich, Milan Building a Geospatial ROMA Project Database, Open-File Report 2004-1099, erg.usgs.gov/rit/ROMAof04052004.pdf

Conko, K.M., Rice, K.C., and Kennedy, M.M., 2004, Atmospheric wet deposition of trace elements to a suburban environment, Reston, Virginia, USA: Atmospheric Environment, vol. 38, no. 24, p. 4025-4033, doi: 10.1016/j.atmosenv.2004.03.062.

Crossett, K.M., Culliton, T.J., Wiley, P., and Goodspeed, T.R., 2004, Population trends along the Coastal United States, 1980�08: Silver Spring, Maryland, National Oceanic and Atmospheric Administration, National Ocean Service, 47 p.

Denver, J.M., Ator, S.W., Debrewer, L.M., Ferrari, M.J., Barbaro, J.R., Hancock, T.C., Brayton, M.J., and Nardi, M.R., 2004, Water quality in the Delmarva Peninsula桪elaware, Maryland, and Virginia, 1999�01: U.S. Geological Survey Circular 1228, 30 p.

Gellis, A.C., Pavich, M.J., Landwehr, J.M., Banks, W.S.L., Bierman, P.R., and Reuter, J.M., 2004, Identifying watershed sediment sources in the Chesapeake Bay: EOS Transactions, American Geophysical Union, Fall Meeting Supplement, v. 85, Abstract H51C-1159.

Goetz, S.J., Jantz, C.A., Prince, S.D., Smith, A.J., Varlyguin, D., and Wright, R.K., 2004, Integrated analysis of ecosystem interactions with land use change: the Chesapeake Bay watershed, pages 263�5 in DeFries, R.S., Asner, G.P., and Houghton, R.A., eds., Ecosystems and land use change: Washington, D.C., American Geophysical Union, Geophysical Monograph Series

Greene, E.A., LaMotte, A.E., and Cullinan, Kerri-Ann, 2004, Ground-Water Vulnerability to Nitrate Contamination at Multiple Thresholds in the Mid-Atlantic Region Using Spatial Probability Models: U.S. Geological Survey Scientific Investigations Report 2004-5118, 24p.

Hale, R.C., LaGuardia, M.J., Harvey, E., Rattner, B.A., Watts, B.D., and Potter, K.E., 2004, Are PBDE congener profiles useful indicators of source? in Proceedings of the 25th Annual Meeting of the Society of Environmental Toxicology and Chemistry, November 14�, 2004, Portland, Oregon, PM042.

Haramis, G.M., and Kearns, G.D., 2004, Invasive herbivory: Resident Canada geese and the decline of wild rice along the tidal Patuxent River, p. 37� in Perry, M.C., ed., Mute swans and their Chesapeake Bay habitats, in Proceedings of a symposium, U.S. Geological Survey Information and Technology Report 2004�05, 59 p.

Iwanowicz, L.R., Densmore, C.L., and Ottinger, C.A., 2004, A Calcein, AM based cytotoxic-cell assay for fish leucocytes: Fish and Shellfish Immunology, v. 16, no. 2, p. 127�7.

Kemp, W.M., Batiuk, R., Bartleson, R., Bergstrom, P., Carter, V., Gallegos, C.L., Hunley, W., Karrh, L., Koch, E., Landwehr, J.M., Moore, K.A., Murray, L., Naylor, M., Rybicki, N.B., Stevenson, J.C., and Wilcox, D., 2004, Habitat requirements for submerged aquatic vegetation in Chesapeake Bay: Water quality, light regime, and physical-chemical factors: Estuaries, v. 27, no. 3, p. 363-377.

Langland, Michael J., Phillips, Scott W., Raffensperger, Jeff P. , and Moyerm, Douglas L. Changes in Streamflow and Water Quality in Selected Nontidal Sites in the Chesapeake Bay Basin, 1985-2003 U. S. Geogloical Survey Scientific Investigations Report 2004-5259

Larsen, C., Clark, I., Guntenspergen, G.R., Cahoon, D.R., Caruso, V., Hupp, C., and Yanosky, T., 2004, The Blackwater NWR inundation model. Rising sea level on a low-lying coast: Land use planning for wetlands: U.S. Geological Survey Open File Report 04�02, available online

Merritts, D., Walter, R., Lippincott, C., and Siddiqui, S., 2004, High suspended and sediment yields of the Conestoga River watershed to the Susquehanna River and Chesapeake Bay are the result of ubiquitous post-settlement mill dams: EOS Transactions, American Geophysical Union, v. 85, no. 47, p. 903.

Newell, Wayne L., Clark, Inga Clark, and Bricker, Owen Bricker, 2004, Distribution of Holocene Sediment in Chesapeake Bay as Interpreted from Submarine Geomorphology of the Submerged Landforms, Selected Core Holes, Bridge Borings and Seismic Profiles: U.S. Geological Survey Open-File Report 2004-1235.

Perry, M.C., ed., 2004, Mute swans and their Chesapeake Bay habitats, proceedings of a symposium: U.S. Geological Survey Information and Technology Report 2004�05, 59 p.

Perry, M.C., Osenton, P.C., and Lohnes, E.J.R., 2004, Food habits of mute swans in Chesapeake Bay, p. 31� in Perry, M.C., ed., Mute swans and their Chesapeake Bay habitats, proceedings of a symposium: U.S. Geological Survey Information and Technology Report 2004�05, 40 p.

Pinkney, A.E., Harshbarger, J.C., May, E.B., and Melancon, M.J., 2004, Tumor prevalence and biomarkers of exposure in brown bullhead (Ameiurus nebulosus) from Back River, Furnace Creek, and Tuckahoe River, Maryland: Archives of Environmental Contamination and Toxicology, v. 46, no. 4, p. 492�1.

Pinkney, A.E., Harshbarger, J.C., May, E.B., and Reichert, W.L., 2004, Tumor prevalence and biomarkers of exposure and response in brown bullhead (Ameiurus nebulosus) from the Anacostia, Washington, D.C. and Tuckahoe River, Maryland, USA: Environmental Toxicology and Chemistry, v. 23, no. 3, p. 638�7.

Rattner, B.A., P.C. McGowan, N.H. Golden, J.S. Hatfield, P.C. Toschik, R.F.Lukei Jr., R. C. Hale, I. Schmitz-Afonso, and Rice, C.P., 2004, Contaminant exposure and reproductive success of ospreys (Pandion haliaetus) nesting in Chesapeake Bay regions of concern. Archives of Environmental Toxicology and Chemistry. 47:126-140.

Rice, K.C., Chanat, J.G., Hornberger, G.M., and Webb, J.R., 2004, Interpretation of concentration-discharge patterns in acid-neutralizing capacity during stormflow in threesmall, forested catchments in Shenandoah National Park, Virginia: Water Resources Research, vol. 40, no. 5, W05301, doi:10.1029/2003WR002709.

Rice, K.C., and Jung, R.E., 2004, Water-quality and amphibian population data collected in Maryland, Washington, D.C., and Virginia, 2001-2004: USGS Open-File Report 2004-1401, 45 p.

Rhodes, M.W., Kator, H., Kaattari, I., Gauthier, D., Vogelbein, W., and Ottinger, C.A., 2004, Isolation and char acterization of mycobacteria from striped bass (Morone saxatilis) from Chesapeake Bay: Diseases of Aquatic Organisms, v. 61, no. 1� p. 41�.

Senus, Michael P., Langland, Michael J. and Moyer, Douglas L., Nutrient and Sediment Concentrations, Loads, and Trends for Four Nontidal Tributaries in the Chesapeake Bay Watershed, 1997-2001, 33p., U.S. Scientific Investigations Report 2004-5125

U.S. Environmental Protection Agency Chesapeake Bay Program, 2004, Resource lands assessment, October 2005: Annapolis, Maryland, [variously paged].

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FY 2003

Bricker, Owen P., Newell, Wayne L., and Simon, Nancy N., 2003, Bog Iron Formation in the Nassawangon Watershed, Maryland: U. S. Geological Survey Open File Report, 3-346 online only

Brakebill, J.W., and Preston, S.D., 2003, A digital hydrologic network supporting spatially referenced regression modeling in the Chesapeake Bay watershed , in Proceedings of the U.S. Environmental Protection Agency EMAP Symposium 2001: Coastal Monitoring Through Partnerships, Environmental Monitoring and Assessment, April 24�, 2001, Pensacola, Florida, [81:1� 73�, 403 p.

Bratton, J.F., Colman, S.M., and Seal, R.R., II, 2003, Eutrophication and carbon sources in Chesapeake Bay over the last 2,700 years: Human impacts in context: Geochimica et Cosmochimica Acta, v. 67, p. 3,385�402.

Cronin, T.M., Dwyer, G.S., Kamiya, T., Schwede, S., Willard, D.A., 2003, Medieval Warm Period, Little Ice Age and 20th century temperature variability from Chesapeake Bay: Global Plantary Change, ScienceDirect, doi:10.1016/S0921-8181(02)00161-3 , p. 17-29.

Cronin, T.M. and Vann, C.D. 2003, The sedimentary record of climatic and anthropogenic influence on the Patuxent Estuary and Chesapeake Bay ecosystems, Investigations of Atlantic Estuaries, Journal Article, v. 26, n. 2A, p. 196-209.

Erwin, R.M., Brinker, D., and Fruh, B., 2003, Poplar Island environmental restoration project: Build it and they (wildlife) will come, but are all welcome?, in Proceedings of the 13th Biennial Coastal Zone Conference, Baltimore, Maryland, July 13�, 2003, NOAA/CSC/20322-CD. CD-ROM.

Gauthier, D.T., Cartwright, D.D., Densmore, C.L., Blazer, V.S., and Ottinger, C.A., 2003, Measurement of in vitro mitogenesis in fish: ELISA-based detection of the thymidine analogue 5�-bromo-2�-deoxyuridine: Fish and Shellfish Immunology, v. 14, p. 279�8.

Golden, N.H., Rattner, B.A., McGowan, P.C., Parsons, K.C., and Ottinger, M.A., 2003, Concentrations of metals in feathers and blood of nestling black-crowned night-herons (Nyticorax nycticorax) in Chesapeake and Delaware Bays, Bulletin of Environmental Contamination and Toxicology 70:385-393.

Kiryu, Y., Shields, J.D., Vogelbein, W.K., Kator, H., and Blazer, V.S., 2003, Infectivity and pathogenicity of the oomycete, Aphanomyces invadans, in Atlantic menhaden, Brevoortia tyrannus: Diseases of Aquatic Organisms, v. 54, no. 2, p. 135�6.

Konrad, C.P., 2003, Effects of urban development on floods: U.S. Geological Survey Fact Sheet 076�, 4 p.

Langland M., Cronin, T. and Phillips, S.W, 2003, An executive summary of sediment processes in the Chesapeake Bay and watershed: U.S. Geological Survey Water-Resources Investigations Report 03-4123, 109 p.

Langland, M.J., Phillips, S.W., Raffensperger, J.P, and Moyer, D.L., 2003, Changes in Streamflow and Water Quality in Selected Nontidal Sites in the Chesapeake Bay Basin, 1985-2003: U.S. Geological Survey Scientific Investigations Report 2004-5259

Lindsey, B.D., Phillips, S.W., Donnelly, C.A., Speiran, G.K., Plummer, L.N., B鰄lke, J.K., Focazio, M.J., and Burton, W.C., 2003, Residence time and nitrate transport in ground water discharging to streams in the Chesapeake Bay Watershed: U.S. Geological Survey Water-Resources Investigations Report 03-4035, 202 p.

Phillips, S.W. and Lindsey, B.D., 2003, The influence of ground water on nitrogen delivery to the Chesapeake Bay: U.S. Geological Survey Fact Sheet FS-091-03. 6p.

Reimschuessel, R., Gieseker, C.M., Driscoll, C., Baya, A., Kane, A.S., Blazer, V.S., Evans, J.J., Kent, M.L., Moran, J.D.W., and Poynton, S.L., 2003, Myxosporean plasmodial infection associated with ulcerative lesions in young-of-the-year Atlantic menhaden in a tributary of the Chesapeake Bay, and possible links to Kudoa clupeidae: Diseases of Aquatic Organisms, v. 53, no. 2, p. 143�6.

Willard, D.A. and Cronin, T.M., and Verardo, S., 2003, Late Holocene climate and ecosystem history from Chesapeake Bay sediment cores, USA. The Holocene, v. 13, p. 201-214.

Williams, D. J. Nancy B. Rybicki, Alfonso V. Lombana, Tim M. O払rien , Richard B. Gomez, 2003, Preliminary Investigation of Submerged Aquatic Vegetation Mapping using Hyperspectral Remote Sensing, Environmental Monitoring and Assessment, v. 81, p.383-392.

U.S. Environmental Protection Agency, 2003, Ambient water-quality criteria for dissolved oxygen, water clarity, and chlorophyll-a for Chesapeake Bay and its tidal tributaries: Annapolis, Maryland, U.S. Environmental Protection Agency Report 903-R-03-002.

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FY 2002

Alexander-Augustine, L.E., and Hupp, C.R., 2002, Process and pattern: Hydrogeomorphology and biodiversity in forested wetlands on the Chesapeake Bay Coastal Plain, in Proceedings of the 87th Annual Meeting of the Ecological Society of America and the 14th Annual International Conference of the Society for Ecological Restoration, August 4� 2002, Tucson, Arizona.

Bachman, L. J., Krantz, D. E., and B鰄lke, J. K., 2002, Hydrogeologic framework, ground-water geochemistry, and assessment of nitrogen yield from base flow in two agricultural watersheds, Kent County, Maryland, U.S. Environmental Protection Agency, EPA/600/R-02/008, 93 p.

Blazer, V.S., Lilley, J.H., Schill, W.B., Kiryu, Y., Densmore, C.L., Panyawachira, V., and Chinabut, S., 2002, Aphanomyces invadans in Atlantic menhaden along the east coast of the United States: Journal of Aquatic Animal Health, v. 14, no. 1, p. 1�.

Chanat, J.G., Rice, K.C., and Hornberger, G.M., 2002, Consistency of patterns in concentration-discharge plots: Water Resources Research, 10.1029/2001WR000971, 17 August 2002.

Couch, C., and Hamilton, P., 2002, Effects of urbanization on stream ecosystems: U.S. Geological Survey Fact Sheet 042�, 2 p.

Doheny, E.J., Starsoneck, R.J., Mayer, P.M., and Striz, E.A., Pre-Restoration Geomorphic Characteristics of Minebank Run, Baltimore County, Maryland, 2002�, U.S. Geological Survey Scientific Investigations Report 2007-5127

Haramis, G.M., D.G. Jorde, G.H. Olsen, D.B. Stotts, and M.K Harrison, Sr. 2002. Breeding productivity of Smith Island black ducks. Pages 22-30 in M.C. Perry,ed. Black ducks and their Chesapeake Bay Habitats: Proceedings of a Symposium, USGS/BRD/ITR-2000-005.

Kiryu, Y., Shields, J.D., Vogelbein, W.K., Zwerner, D.E., and Kator, H., 2002, Induction of skin ulcers in Atlantic menhaden by injection and aqueous exposure to the zoospores of Aphanomyces invadans: Journal of Aquatic Animal Health, v. 14, no. 1, p. 11�.

Kolpin, D.W., Furlong, E.T., Meyer, M.T., Thurman, E.M., Zaugg, S.D., Barber, L.B., and Buxton, H.T, 2002, Pharmaceuticals, hormones, and other organic wastewater contaminants in U.S. streams, 1999�00: A national reconnaissance: Environmental Science and Technology, v. 36, no. 6, p. 1,202�211.

Phillips, S.W., Barlow, R.A., Brakebill, J.W., Bratton, J.F., Blazer, V.S., Bohlke, J.F., Bricker, O.P., Colman, S.M., Cronin, T.M., Hupp, C.R., Keough, J.R., Landwehr, J.M., Langland, M.J., Newell, W.L., Perry, M.C., Phillips, S.W., Preston, S.D., Rybicki, N.B., Simon, N.S., Willard, D.A., 2002, The U.S. Geological Survey and the Chesapeake Bay - The role of science in environmental restoration: U.S. Geological Survey Circular 1220. (online report)

Rice, K.C., Conko, K.M., Hornberger, G.M., 2002, Anthropogenic sources of arsenic and copper to sediments in a suburban lake, northern Virginia: Environmental Science & Technology, vol. 36, no. 23, p. 4962-4967.

Smith, S.B., Donahue, A.P., Lipkin, R.J., Blazer, V.S., Schmitt, C.J., and Goede, R.W., 2002, Illustrated field guide for assessing external and internal anomalies in fish: U.S. Geological Survey Information and Technology Report 2002�07, 46 p.

Zheng, Y., Weinman, B., Cronin, T., Fleisher, M.Q., and Anderson, R.F. 2002, A rapid procedure for the determination of thorium, uranium, cadmium and molybdenum in small sediment samples by inductively coupled plasma-mass spectrometry application in Chesapeake Bay, Applied Geochemistry, p. 539-549, Science Direct

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FY 2001

Brakebill, J.W., Preston, S.D., and Martucci, S.K., 2001, Digital data used to relate nutrient inputs to water quality in the Chesapeake Bay, Version 2.0: U.S. Geological Survey Open-File Report 01�1, [variously paged].

Cerco, C.F., and Moore, K., 2001, System-wide submerged aquatic vegetation model for Chesapeake Bay: Estuaries, v. 24, no. 4, p. 522�4.

Church, J.A., Gregory, J.M., Huybrechts, P., Kuhn, M., Lambeck, K., Nhuan, M.T., Qin, D., and Woodworth, P.L., 2001, Changes in sea level, in Climate Change 2001: The scientific basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change, Houghton, J.T., Ding, Y., Griggs, D.J., Noguer, M., van der Linden, P.J., Dai, X., Maskell, K., and Johnson, C.A., eds.: Cambridge, United Kingdom and New York, New York, USA, Cambridge University Press, p. 639�3.

Douglas, B.C., 2001, Sea level change in the era of the recording tide gauge, p. 37�, in Douglas, B.C., Kearney, M.S., and Leatherman, S.P., eds., Sea level rise: History and consequences: San Diego, California, Academic Press, 272 p.

Haramis, G.M., D.G. Jorde, S.A. Macko, and J.L. Walker. 2001. Stable-isotope analysis of canvasback winter diet on Chesapeake Bay. Auk 118:1008-1017.

Langland, M.J., Edwards, R.E., Sprague, L.A., and Yochum, S.E., 2001, Summary of Trends and Status Analysis for Flow, Nutrients, and Sediments at Selected Nontidal Sites, Chesapeake Bay Basin, 1985-99: U.S. Geological Survey Open-File Report 01-73 49 p.

Peper, John D., McCartan, Lucy B., Horton, J. Wright Jr., and Reddy, James E., 2001, Preliminary Lithogeochemical Map Showing Near-Surface Rock Types in the Chesapeake Bay Watershed, Virginia and Maryland, U.S. Geological Survey Open-File Report 01-187, Version 1.0

Phillips, S.W. 2001, The Impact of Sediment on the Chesapeake Bay and its Watershed SRI 2004-5056

Phillips, S.W. 2001, The U.S. Geological Survey Chesapeake Bay Science Program, USGS Fact Sheet FS-125-01

Plummer, L. N., Busenberg, E., B鰄lke, J. K., Nelms, D. L., Michel, R. L., and Schlosser, P., 2001, Groundwater residence times in Shenandoah National Park, Blue Ridge Mountains, Virginia, USA: a multi-tracer approach: Chemical Geology, v. 179, p. 93-111.

Rattner, B.A., P.C. McGowan, J.S. Hatfield, C.-S. Hong, and S.G. Chu. 2001, Organochlorine contaminant exposure and reproductive success of black-crowned night herons (Nycticorax nycticorax) nesting in Baltimore Harbor, Maryland, Archives of Environmental Contamination and Toxicology 41:73-82.

Rice, K.C., Maben, S.W., and Webb, J.R., 2001, Water-quality data of soil water from three watersheds, Shenandoah National Park, Virginia, 1999�00: USGS Open-File Report 01-236, 17 p.

Rybicki, N.B., 2001, Relationships between environmental variables and submersed aquatic vegetation in the Potomac River, 1985-1997, Ph. D Thesis, George Mason University, Fairfax, Va.

Rybicki, N.B., McFarland, D.G., Ruhl, H.A., Reel, J.T. and Barko, J.W. 2001, Investigations of the availability and survival of submersed aquatic vegetation propagules in the Tidal Potomac River, Estuaries, v. 24, no. 3, p. 407-424

Sprague, L.A., 2001, Effects of storm-sampling frequency on estimation of water-quality loads and trends in two tributaries to Chesapeake Bay in Virginia: U.S. Geological Survey Water-Resources Investigations Report 01-4136, 38 p.

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FY 2000

Ator, S.W., Denver, J.M., and Hancock, T.C., 2000, Relating shallow ground-water quality to surfical hydrogeology in the Mid-Atlantic Coastal Plain, in Proceedings of the National Water-Quality Monitoring Conference, April 25�, 2000, Austin, Texas, p. 409�3.

Batiuk, R., Ailstock, S., Bartleson, R., Bergstrom, P., Carter, V., Gallegos, C.L., Karrh, L., Kemp, W.M., Koch, E., Landwehr, J.M., Moore, K.A., Murray, L., Naylor, M., Rybicki, N.B., Stevenson, J.C., Teichberg, M., and Wilcox, D., 2000, Chesapeake Bay Submerged Aquatic Vegetation Water Quality and Habitat-Based Requirements and Restoration Targets - A Second Technical Synthesis, CBP/TRS 245/00, Chesapeake Bay Program, Annapolis, 217 pp (on-line report) www.chesapeakebay.net/pubs/sav/index.html

Blazer, V.S., 2000, Necropsy-based fish health assessment, in Schmitt, C.J., and Dethloff, G.M., eds., Biomonitoring of Environmental Status and Trends (BEST) Program: Selected methods for monitoring chemical contaminants and their effects in aquatic ecosystems: U.S. Geological Survey Information and Technology Report USGS/BRD-2000-0005, p. 18�.

B鰄lke, J. K., and Horan, M., 2000, Strontium isotope geochemistry of ground waters and streams affected by agriculture, Locust Grove, Maryland: Applied Geochemistry, v. 15, p. 599-609.

Carter, V., Rybicki, N.B., Landwehr, J.M., and Naylor, M., 2000, Light requirements for SAV survival and growth: Chesapeake Bay Submerged Aquatic Vegetation Water Quality and Habitat-Based Requirements and Restoration Targets - A Second Technical Synthesis, printed by the United States Environmental Protection Agency for the Chesapeake Bay Program, p. 11-33. (online report) www.chesapeakebay.net/pubs/sav/index.html

Conko, K.M., Kennedy, M.M., and Rice, K.C., 2000, Water-quality data collected at Lake Anne, Reston, Virginia, 1997-1999: USGS Open-File Report 00-481, 49 p.

Cronin, Thomas, M.; Willard, Debra, A.; Phillips, Scott, W; 2000, Effects of Climate Variability and Human Activities on Chesapeake Bay and the Implications for Ecosystem Restoration (2000), U.S. Geological Survey Fact Sheet 116-00, Online Version 1.0

Cronin, T.M., Willard, D.A., R.T. Kerhin, A.W. Karlsen, C. Holmes, S. Ishman, S. Verardo, J. McGeehin, S. Colman, A. Zimmerman, 2000, Climatic variability in the eastern United States over the past millennium from Chesapeake Bay sediments , Geology v. 28, p. 3-6.

Harms, C.A., Ottinger, C.A., Blazer, V.S., Densmore, C.L., Pieper, L.H., and Kennedy-Stoskopf, S., 2000, Quantitative polymerase chain reaction for transforming growth factor-� applied to a field study of fish health in Chesapeake Bay tributaries: Environmental Health Perspectives, v. 108, no. 5, p. 447�2.

Harms, C.A., Ottinger, C.A., and Kennedy-Stoskopf, S., 2000, Correlation of transforming growth factor-� messenger RNA (TGF-� mRNA) expression with cellular immunoassays in Triamcinolone-treated captive hybrid striped bass: Journal of Aquatic Animal Health, v. 12, no. 1, p. 9�.

Hupp, C.R., 2000, Hydrology, geomorphology, and vegetation of coastal plain rivers in the south-eastern USA: Hydrological Processes, v. 14, nos. 16�, p. 2,991�010.

Sprague, L.A., Langland, M.J., Yochum, S.E., Edwards, R.E., Blomquist, J.D., Phillips, S.W., Shenk, G.W., and Preston, S.D., 2000, Factors Affecting Nutrient Trends in Major Rivers of the Chesapeake Bay Watershed: U.S. Geological Survey Water-Resources Investigations Report 00-4218, 98 p.

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FY 1999

Acevedo, W., 1999, Analyzing land-use change in urban environments: U.S. Geological Survey Fact Sheet 188�, 4 p.

Belval, D.L., and Sprague, L.A., 1999, Monitoring Nutrients in the Major Rivers Draining to Chesapeake Bay: U.S. Geological Survey Water-Resources Investigations Report 99-4238, 8 p.

Blazer, V.S., Vogelbein, W.K., Densmore, C.L., May, E.B., Lilley, J.H., and Zwerner, D.E., 1999, Aphanomyces as a cause of ulcerative skin lesions of menhaden from Chesapeake Bay tributaries: Journal of Aquatic Animal Health, v. 11, no. 4, p. 340�9.

Blazer, V., Phillips, S.W., Pendleton, E., 1999, Fish Health, Fungal Infections, and Pfiesteria, The Role of the USGS, U.S. Geological Survey Fact Sheet FS-114-98

Brakebill, John W., and Preston, Stephen D., 1999, Digital Data Used to Relate Nutrient Inputs to Water Quality in the Chesapeake Bay Watershed, Version 1.0: U.S. Geological Survey Open-File Report 99-60

Bratton, J.F., S.M. Colman, and G. Ravizza, 1999, Sedimentary rhenium enrichment and hypoxia in Chesapeake Bay, Geological Society of America, Annual Meeting, Abstracts with Programs, v. 31(7), Denver, Colorado.

Baucom, P.C., and Colman, Steven M. 1999, A continuous Holocene transgressive sequence recorded in an 8-m core from northern Chesapeake Bay, Geological Society of America, Annual Meeting, Abstracts with Programs, v. 31(7), Denver, Colorado.

Baucom, Pattie C., Colman, Steven M., and Bratton, John F., 1999, Biogenic silica trends in Chesapeake Bay, EOS, Transaction, AGU, v. 80, 46, p. F46.

Colman, S. Cronin, T. Bratton, J. Baucom, P. and Poag, W. 1999, Chronology of sedimentation in the Chesapeake Bay from recent coring programs, including the 1999 R/V Marion Dufresne IMAGES leg, Abstract, EOS, Transaction, AGU v. 80, no. 46, p. F1.

Cronin, T. M., R.S. Wagner, M. Slattery. (eds.). 1999, Microfossils from Chesapeake Bay sediments:   Illustrations and species database includes 5 chapters, one on each major microfossil group), USGS Open-file report 99-45)

Cronin, T.M., Dwyer, G.S., Baker, P.A., and Dowsett, H.J., 1999, Application of shell chemistry of the ostracode Loxoconcha to climatic and environmental variability along eastern United States, EOS, AGU Transactions supplement, v. 80, no. 17, p. S176.

Cronin, T.M.. Verardo, S., Weimer, L., Ishman, S., Dwyer, G., 1999, Holocene climate variability in the eastern United States recorded in Chesapeake Bay sediments, EOS, Transactions AGU v. 80, no. 46, p. F7, F8.

Cronin, T.M., D.A. Willard, S. Verardo, Randy Kerhin, Steve Colman, John Bratton, and Charles Holmes , 1999, Chesapeake Bay Holocene climatic and ecosystem history, Abstracts, 25th Assateague Shelf and Shore Conference, Lewes, Delaware.

Cronin, T., S. Colman, Willard, D., Kerhin, R., Holmes, C., Karlsen, A., Ishman, S., Bratton, J., 1999, Interdisciplinary environmental project probes Chesapeake Bay down to the core, EOS, AGU Transactions v. 80, no. 21, p. 237, 240-241.

Darrell, L.C., Feit Majedi, B., Lizarraga, J.S., and Blomquist, J.D., 1999, Nutrient and Suspended-Sediment Concentrations, Trends, Loads, and Yields From the Nontidal Part of the Susquehanna, Potomac, Patuxent, and Choptank Rivers, 1985-96: U.S. Geological Survey Water-Resources Investigations Report 98-4177, 38 p.

Landwehr, J.M., Reel, J.T, Rybicki, N.B., Ruhl, H.A, and Carter, V., 1999, Chesapeake Bay habitat criteria scores and the distribution of submersed aquatic vegetation in the Tidal Potomac River and Potomac Estuary, 1983-1997: U.S. Geological Survey Open-File Report 99-219, 34p. (online report)

Langland, M.J., Blomquist, J.D., Sprague, L.A., Edwards, R.E., 1999, Trends and Status of Flow, Nutrients, and Sediments for Selected Nontidal Sites in the Chesapeake Bay Watershed, 1985-98: U.S. Geological Survey Open File Report 99-451, 64 p.

Powars, David S., Bruce, T. Scott, 1999, The effects of the Chesapeake Bay impact crater on the geological framework and correlation of hydrogeologic units of the lower York-James Peninsula, Virginia: USGS Professional Paper 1612, 82 p., 9 pl.

Preston, S.D., and Brakebill, J.W., 1999, Applications of spatially referenced regression modeling for the evaluation of total nitrogen loading in the Chesapeake Bay watershed: U.S. Geological Survey Water-Resources Investigations Report 99�54, 12 p.

Willard, D.A., L.M. Weimer, D.A. Korejwo. 1999, Impacts of Holocene climate variability, on vegetation of the eastern United States, EOS, Transactions AGU, v.80, no. 46, p. F8.

Willard, D.A. and Cronin, T.M., 1999, Late Holocene climatic variability in eastern North America over the last millennium, EOS, AGU Transactions supplement, v. 80, no. 17, p. S170-S171.

Woods, A.J., Omernik, J.O., and Brown, D.D., 1999, Level III and IV ecoregions of Delaware, Maryland, Pennsylvania, Virginia, and West Virginia: U.S. Environmental Protection Agency, National Health and Environmental Effects Laboratory, 24 p.

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FY 1998

Ator, S.W., Blomquist, J.D., Brakebill, J.W., Denis, J.M., Ferrari, M.J., Miller, C.V., and Zappia, H., 1998, Water Quality in the Potomac River Basin, Maryland, Pennsylvania, Virginia, West Virginia, and the District of Columbia, 1992-96: U.S. Geological Survey Circular 1166

Bachman, L.J., Lindsey, B., Brakebill, J., and Powars, D.S., 1998, Ground-water discharge and base flow nitrate loads of nontidal streams, and their relation to a hydrogeomorphic classification of the Chesapeake Bay Watershed, Middle Atlantic Coast: U.S. Geological Survey Water Resources Investigations Report 98-4059

Bratton, J.F., S.M. Colman, R.R. Seal, II, and R.W. Murray, 1998, Anoxia history in Chesapeake Bay based on nitrogen isotopes and redox-sensitive metals, EOS, Transactions, American Geophysical Union, Fall Meeting, San Francisco, v. 79, n. 4, Nov. 10, 1998 Supplement, p. F496.

Carter, V., Rybicki, N.B., Landwehr, J.M., Reel, J.T., and Ruhl, H.A., 1998, Summary of correlations among seasonal water quality, discharge, weather, and coverage by submersed aquatic vegetation in the Tidal Potomac River and Potomac Estuary, 1983-1996: U.S. Geological Survey Open-File Report 98-657, 81p. (online report)

Cronin, T.M., D. Willard, R. T. Kerhin, A. Karlsen, C. Holmes, J. McGeehin, M. Slattery, 1998, Climatic and anthropogenic influences on Chesapeake Bay ecosystem over the last millennium Abstracts, 6th International Conference on Paleoceanography (Lisbon 8/98)

Derosier, A.L., Brakebill, J.W., Denis, J.M., and Kelley, S.K., 1998, Water-Quality Assessment of the Potomac River Basin: Water-Quality and Selected Spatial Data, 1992-96: U.S. Geological Survey Open-File Report 98-180

Focazio, M.J., Plummer, L.N., Bohike, J.K., Busenberg, Bachman, L.J., and Powars, D.S., 1998, Preliminary estimates of residence times and apparent ages of ground water in the Chesapeake Bay Watershed, and water-quality data from a survey of springs: U.S. Geological Survey Water Resources Investigations Report 97-4225

Johnson, H.M., and Belval, D.L., 1998, Nutrient and Suspended Solids Loads, Yields, and Trends in the Non-Tidal Part of Five Major River Basins in Virginia, 1985-96: U.S. Geological Survey Water-Resources Investigations Report 98-4025, 36p.

Karlsen, A., T.M. Cronin, D. A. Willard, R. Kerhin, and S. Ishman. 1998, Historical anthropogenic induced changes in bottom water salinity and dissolved oxygen in the mesohaline portion of Chesapeake Bay Ecological Society of America

Kerhin, R. T., C. Williams, T. M. Cronin. 1998, Lithologic descriptions of piston cores from Chesapeake Bay, Maryland, USGS Open-File Report 98-787

Langland, M.J., Edwards, R.E., Darrell, L.C., 1998, Status Yields and Trends of Nutrients and Sediment and Methods of Analysis for the Nontidal Data-Collection Programs, Chesapeake Bay Basin, 1985-96: U.S. Geological Survey Open-File Report 98-17

Langland, M.J., 1998, Changes in Sediment and Nutrient Storage in Three Reservoirs in the Lower Susquehanna River Basin and Implications for the Chesapeake Bay: U.S. Geological Survey Fact Sheet 003-98

Larsen, C. E. 1998, The Chesapeake Bay: Geologic Product of Rising Sea Level USGS Fact Sheet 102-98.

Lindsey, B.D., Breen, K.J., Bilger, M.D., and Brightbill, R.A., 1998, Water Quality in the Lower Susquehanna River Basin, Pennsylvania and Maryland, 1992-95: U.S. Geological Survey Circular 1168

Majewski, M.S., Foreman, W.T., Goolsby, D.A., and Nakagaki, N., 1998, Airborne pesticide residues along the Mississippi River: Environmental Science and Technology, v. 32, no. 23, p. 3,689�698.

McCartan, Lucy B., Peper, John D., Bachman, L. Joseph, Horton, J. Wright, Jr., Application of geologic mapping information to water quality issues in the southern part of the Chesapeake Bay watershed, Maryland and Virginia, eastern United States, Journal of Geochemical Exploration 64 (1998) 355-376

Rice, K.C., and Hornberger, G.M., 1998, Comparison of hydrochemical tracers to estimate source contributions to peak flow in a small, forested, headwater catchment: Water Resources Research, vol. 34, no. 7, p. 1755-1766.

Verardo, S., T.M. Cronin, D.A. Willard, 1998, Climate and environmental changes recorded by Chesapeake Bay dinoflagellate cysts in the last millennium, Geological Society of America, Annual Meeting (Toronto) Abstracts, p. A-284.

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FY 1997

Ator, S.W., and Ferrari, M.J., 1997, Nitrate and selected pesticides in ground water of the Mid-Atlantic Region: U.S. Geological Survey Water-Resources Investigations Report 97�39, 8 p.

Cronin, T.M., D.A. Willard, C W. Holmes, R. Kerhin. 1997, Climate change and its impact on Chesapeake Bay, EOS, AGU Transactions supplement, p. S145.

Cronin, T.M. 1997, Climate Control, Chesapeake Bay Journal, May 1997, p. 1, 4-7.

Ferrari, M.J., Ator, S.W., Blomquist, J.D., and Dysart, J.E., 1997, Pesticides in Surface Water of the Mid-Atlantic Region: U.S. Geological Survey Water-Resources Investigations Report 97-4280

Karlsen, A.W., T.M. Cronin, C.W. Holmes. 1997, Trends in benthic faunal response to environmental change in the Chesapeake Bay, EOS, AGU Transactions supplement, p. S124.

Langland, M.J., and Hainly, R.A., 1997, Changes in bottom-surface elevations in three reservoirs on the Lower Susquehanna River, Pennsylvania and Maryland, following the January 1996 flood桰mplications for nutrient and sediment loads to Chesapeake Bay: U.S. Geological Survey Water-Resources Investigations Report 97�38, 34 p.

O'Brien, A.K., Rice, K.C., Bricker, O.P., Kennedy, M.M., and Anderson, R.T., 1997, Use of geochemical mass balance modelling to evaluate the role of weathering in determining stream chemistry in five mid-Atlantic watersheds on different lithologies: Hydrological Processes, vol. 11, p. 719-744

Rattner, B.A., Melancon, M.J., Rice, C.P., Riley W. Jr., Eisemann, J., and Hines R.K., 1997, Cytochrome P450 and organochlorine contaminants in black-crowned night-herons from the Chesapeake Bay Region, USA, Environmental Toxicology and Chemistry 16:2315-2322.

Rybicki, N.B., Jenter, H.L., Carter, Virginia, Baltzer, R.A., Turtora, Michael, 1997, Tidal flux between a submersed aquatic plant stand and the adjacent channel in the Potomac River near Washington, D.C. Limnology and Oceanography, in press.

Smith, R.A., Schwarz, G.E., and Alexander, R.B., 1997, Regional interpretation of water-quality monitoring data: Water Resources Research, v. 33, no. 12, p. 2,781�798.

Siwiec, S.F., Hainly, R.A., Lindsey, B.D., Bilger, M.D., and Brightbill, R.A., 1997, Water-Quality Assessment of the Lower Susquehanna River Basin, Pennsylvania and Maryland: Design and Implementation of Water-Quality Studies, 1992-1995: U.S. Geological Survey Open-File Report 97-583

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FY 1996

Bell, C.F., Belval, D.L., and Campbell, J.P, 1996, Trends in Nutrients and Suspended Solids at the Fall Line of Five Tributaries to the Chesapeake Bay in Virginia, July 1988 through June 1995: U.S. Geological Survey Water Resources Investigations Report 96-4191, 37 p.

Belval, D.L., and Campbell, J.P., 1996, Water-Quality Data and Estimated Loads of Selected Constituents in Five Tributaries to the Chesapeake Bay at the Fall Line, Virginia, July 1993 through June 1995: U.S. Geological Survey Open-File Report 96-220, 79 p.

Blomquist, J.D., Fisher, G.T., Denis, J.M., Brakebill, J.W., Werkheiser, W.H., 1996, Water-Quality Assesment of the Potomac River Basin: Basin Description and Analysis of Available Nutrient Data, 1970-90: U.S. Geological Survey Water-Resources Investigations Report 95-4221

Carter, Virginia, Rybicki, N.B., and Turtora, Michael, 1996, Effect of increasing photon irradiance on the growth of Vallisneria americana in the tidal Potomac River. Aquatic Botany, v. 54, p. 337-345.

Chichester, D.C., 1996, Hydrogeology of, and simulation of ground-water flow in, a mantled carbonate-rock system, Cumberland Valley, Pennsylvania: U.S. Geological Survey Water-Resources Investigations Report 94-4090

Clapp, R.B. 1996, Great blue heron electrocution in Loudoun County, Virginia, Raven 67:28-31.

Clark, D.R., Jr., C.M. Bunck, and R.J. Hall. [1996]. Female reproductive dynamics in a Maryland population of ringneck snakes (Diadophis punctus). Journal of Herpetology [in press].

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FY 1995

Belval, D.L., Campbell, J.P., Phillips, S.W., and Bell, C.F., 1995, Water-Quality Characteristics of Five Tributaries to the Chesapeake Bay at the Fall Line, Virginia, July 1988 through June 1993: U.S. Geological Survey Water-Resources Investigations Report 95-4258, 71 p.

Bohlke, J.M., and Denver, J.M., 1995, Combined use of groundwater dating, chemical, and isotopic analyses to resolve the history and fate of nitrate contamination in two agricultural watersheds, Atlantic coastal plain, Maryland: Water Resources Research, 31(9), 2319-2339 Cecil, L.D., 1988, Geohydrology of the Furnace Creek basin and Vicinity

Dugas, D.L., Char, S.L., and Baumbach, G.E., 1995, Geographic information system data sets of hydrogeologic conditions in Pequea and Mill Creek watersheds, Pennsylvania: Part 1-Basic Data: U.S. Geological Survey Open-File Report 95-113

Jorde, D.G., G.M. Haramis, C.M. Bunck, and G.W. Pendleton, 1995. Effects of diet on rate of body mass gain by wintering canvasbacks J. WIldl. Manage. 59:31-39.

Langland, M.J., Lietman, P.L., and Hoffman, Scott, 1995, Synthesis of Nutrient and Sediment Data for Watersheds within the Chesapeake Bay Drainage Basin: U.S. Geological Survey Water-Resources Investigations Report 95-4233, 121 p.

Langland, M.J., and Fishel, D.K., 1995, Hydrology and the effects of selected agricultural best-management practices in the Bald Eagle Creek watershed, York County, Pennsylvania, prior to and during nutrient management: U.S. Geological Survey Water-Resources Investigations Report 93-4069

Low, D.J., Chichester, D.C., and Char, S.J., 1995, Geographic information system data sets of hydrogeologic conditions in Pequea and Mill Creek watersheds, Pennsylvania: Part 2-Hydrogeologic interpretations: U.S. Geological Survey Open-File Report 95-113

Maryland Department of the Environment, 1995, Chesapeake Bay Water-Quality Monitoring, River Input Monitoring Component, Level 1 Data Summary Report:-1993: Watershed Management Program, Chesapeake Bay and Watershed Management Administration Technical Report 95-002, 56 p.

McFarland, E.R., 1995, Ground Water Flow, geochemistry, and effects of agricultural practices on nitrogen transport as study sites in the piedmont and costal plain physiographic provinces, Patuxent River basin, Maryland: U.S. Geological Survey Open-File Report 94-507

Nelms, D.L., Harlow, G.E. Jr., and Hayes, D.C., 1995, Base-flow Characteristics of streams in the valley and ridge, Blue Ridge, and piedmont physiographic provinves of Virginia: U.S. Geological Survey Open-File Report 95-298

Nutrient Subcommittee of the Chesapeake Bay Program, 1995, Water quality functions of riparian forest buffer systems in the Chesapeake Bay watershed: U.S. Environmental Protection Agency Technology Transfer Report EPA 903-R-95-004

Perry, M.C. and A.S. Deller. 1995, Waterfowl population trends in the Chesapeake Bay area. Pages 490-504 in Paula Hill and Steve Nelson, editors. Proceedings of the 1994 Chesapeake Research Conference. Toward a Sustainable Watershed: The Chesapeake Experiment. CRC Publication No. 149. Chesapeake Research Consortium, Edgewater, Md. iv, 724 pp.

Rice, K.C. and Bricker, O.P., 1995, Seasonal cycles in streamwater quality on Catoctin Mountain, Maryland: USGS FS-136-95, 2 p.

Rice, K.C. and Bricker, O.P., 1995, Seasonal cycles of dissolved constituents in streamwater in two forested catchments in the mid-Atlantic region of the eastern U.S.A.: Journal of Hydrology, vol. 170, p. 137-158.

Rybicki, N.B. and Carter, Virginia, 1995, Revegetation and propagule transport in the tidal Potomac River in Proceedings, 29th Annual Meeting Aquatic Plant Control Program: U. S. Army Corps. of Engineers, Vicksburg, Mississippi, Misc. Paper A-95-3, p. 201-218.

Shultz, R.A., Hobba, W.A., and Kozar, M.D., 1995, Geohydrology, ground-water availability, and ground-water quality of Berkeley County, West Virginia, with emphasis on the carbonate-rock area: U.S. Geological Survey Water-Resources Investigations Report 93-4073

Zynjuk, L.D., 1995, Chesapeake Bay: Measuring Nutrient Pollution: U.S. Geological Survey Fact Sheet FS-055-95.

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FY 1994

Belval, D.L., Woodside, M.D., and Campbell, J.P., 1994, Relation of Stream Quality to Streamflow, and Estimated Loads of Selected Water-Quality Constituents in the James and Rappahannock Rivers near the Fall Line of Virginia, July 1988 through June 1990: U.S. Geological Survey Water-Resources Investigations Report 94-4042, 85 p.

Carter, Virginia, and Rybicki, N.B., 1994, Invasions and declines of submersed macrophytes in the tidal Potomac River and Estuary, the Currituck Sound-Back Bay system, and the Pamlico River Estuary: Lake and Reservoir Management, v. 10, no. 1, p. 39-48.

Carter, Virginia, Rybicki, N.B., Landwehr, J. M., and Turtora, Michael, 1994, Role of weather and water quality on population dynamics of submersed macrophytes in the tidal Potomac River: Estuaries, v. 17, no.2, p.417-426.

Haramis, G.M., E.L. Derleth, and W.A. Link. 1994, Flock sizes and sex ratios of canvasbacks in Chesapeake Bay and North Carolina. Journal of Wildlife Management 58(1):123-131.

Hippe, D.J., Witt, E.C. III, and Giovannitti, R.M., 1994, Hydrology, herbicides and nutrients in ground water and springs, and relation of water quality to land use and agricultural practices near Carlisle, Pennsylvania: U.S. Geological Survey Water-Resources Investigations Report 93-4172

Hatfield, J.S., S.A. Ricciardi, G.A. Gough, D. Bystrak, S. Droege, and C.S. Robbins. 1994, Distribution and abundance of birds wintering in Maryland, 1988-1993. Maryland Birdlife 50(1-4):3-83.

Maryland Department of the Environment, 1994, Chesapeake Bay Water-Quality Monitoring, River Input Monitoring Component, Level 1 Data Summary Report:-1992: Watershed Management Program, Chesapeake Bay and Watershed Management Administration Technical Report 94-012, 91 p.

Reilly, T.E., Plummer, N.L., Phillips, P.J., and Busenberg, E., 1994, The use of simulation and multiple environmental tracers to quantify groundwater flow in a shallow aquifer: Water Resources Research, 30(2), 421-433

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FY 1993

Dennison, W.C., Orth, R.J., Moore, K.A., Stevenson, J.C., Carter, Virginia, Kollar, Stan, Bergstrom, P.W., and Batiuk, R.A., 1993, Assessing water quality with submersed aquatic vegetation: Bioscience, v. 43, no. 2, p. 86-94.

Erwin, R.M. 1993, Survival and post-fledging movements of young snowy egrets and black-crowned night-herons at a Virginia colony. Bulletin of the Ecological Society of America 74(2, supplement):228.

Erwin, R.M., G.M. Haramis, D.G. Krementz, and S. L. Funderburk. 1993, Resource protection for waterbirds in Chesapeake Bay. Environmental Management 17(5):613-619.

Haramis, G.M., Jorde, D.G., and Bunck, C. M., 1993, Survival of hatching-year female canvasbacks wintering on Chesapeake Bay. Journal of Wildlife Management 57(4):763-771.

Haramis, G.M., Jorde, D.G., Klein, P.N., Macko, S.A., and Walker, B.S., 1993, Use of stable isotope ratios to discriminate dietary components of free-ranging animals: An example with Chesapeake Bay canvasbacks. Proceedings, American Association of Zoo Veterinarians Annual Conference 1993:400-405.

Jorde, D.G., Haramis, G.M., and Forsell, D.J., 1993, Waterbirds. Pages 69-75 in Ecologically Valuable Species Workgroup, Preparers, Chesapeake Bay Strategy for the Restoration and Protection of Ecologically Valuable Species. Maryland Department of Natural Resources, Annapolis. ix, 88 pp.

Jordan, T.E., Correll, D.L., and Weller, D.E., 1993, Nutrient Interception by a riparian forest receiving inputs from adjacent cropland: Journal of Environmental Quality, 22(3), 467-473

Keller, C. M.E., C.S. Robbins, and J.S. Hatfield. 1993, Avian communities in riparian forests of different widths in Maryland and Delaware. Wetlands 13(2):137-144.

Maryland Department of the Environment, 1993, Chesapeake Bay Water-Quality Monitoring, River Input Monitoring Component, Level 1 Data Summary Report:-1991 : Watershed Management Program, Chesapeake Bay and Watershed Management Administration Technical Report 93-014, 31 p.

O'Brien, A.K., Rice, K.C., Kennedy, M.M., and Bricker, O.P., 1993, Comparison of episodic acidification of Mid-Atlantic upland and Coastal Plain streams: Water Resources Research, vol. 29, no. 9, p. 3029-3039

Rice, K.C., Kennedy, M.M., Bricker, O.P., and Donnelly, C.A., 1993, Data on the quantity and chemical quality of precipitation, Catoctin Mountain, north-central Maryland, 1982-1991: USGS Open-File Report 93-169, 46 p.

Rice, K.C. and Bricker, O.P., 1993, Hydrologic, chemical, and isotopic characterization of two small watersheds on Catoctin Mountain, north-central Maryland, U.S.A.: Chemical Geology, vol.107, p. 319-321.

Schnabel, R.R., Urban, J.B., and Gburek, W.J., 1993, Hydrologic controls in nitrate, sulfate, and chloride concentrations: Journal of Environmental Quality, 22(3), 589-596

Sigleo, A.C. and Shultz, D.J., 1993, Amino acid composition of suspended particles, sediment trap material, and benthic sediment in the Potomac estuary: Estuaries, v. 16, p.405-415.

Vogel, K.L., and Reif, A.G., 1993, Geohydrology and simulation of ground-water flow in the Red Clay Creek Basin, Chester County, Pennsylvania, and New Castle County, Deleware: U.S. Geological Survey Water-Resources Investigations Report 93-4055

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FY 1992

Batiuk, Richard, Heasley, Patsy, Orth, Robert, Moore, Kenneth, Stevenson, J.C., Dennison, William Staver, Lori, Carter, Virginia, Rybicki, N.B., Hickman, R.E., Kollar, Stan, Bieber, Steven, Bergstrom, Peter, 1992, Chesapeake Bay submerged aquatic vegetation habitat requirements and restoration goals: A Technical Synthesis: USEPA CBP/TRS 83/92, 162 p.

Fishel, D.K., Brown, M.J., Kostelnik, K.M., and Howse, M.A., 1992, Evaluation of agricultural best-management practices in the Conestoga River headwaters, Pennsylvania: U.S. Geological Survey Water-Resources Investigations Report 90-4131

Hall, D.W., 1992, Effects of nutrient management on nitrate levels in ground water near Ephrata, Pennsylvania: Ground Water, 30(5), 720-730

Hall, D.W., and Risser, D.W., 1992, Effects of nutrient management on nitrogen flux through a Karst aquifer, Conestoga River headwaters basin, Pennsylvania: Environmental Protection Agency, The National Rural Clean Water Program Symposium Seminar Publication

Heinz, G.H., S.N. Wiemeyer, D.R. Clark, Jr., P. Albers, P. Henry, and R.A. Batiuk. 1992, Status and assessment of Chesapeake Bay wildlife contamination, Environmental Protection Agency, Chesapeake Bay Program CBP/TRS 80/92. 32 pp.

Helsel, D.R., and Hirsch, R.M., 1992, Statistical methods in water resources: Amsterdam, Elsevier Science Publishers, Studies in Environmental Science, v. 49, 522 p.

Krementz, D.G., D.B. Stotts, G.W. Pendleton, J.E. Hines, and V.D. Stotts. 1992, Comparative productivity of American black ducks and mallards nesting on Chesapeake Bay Islands. Canadian Journal of Zoology 70(2):225-228.

Michel, R.L., 1992, Residence times in river basins as determined by analysis of long-term tritium records: Journal of Hydrology, 130, 367-378

Plummer, L.N., and Busenberg, E., 1992, CFC's—Tools for age dating and tracing shallow ground water: http://internet.ev.usgs.gov/reports/yearbooks/1992/wrd.cfc.html

Rice, K.C. and Bricker, O.P., 1992, Acid rain-induced changes in streamwater quality during storms on Catoctin Mountain, Maryland: USGS Open-File Report 92-649, Water Fact Sheet, 2 p.

Rice, K.C. and Bricker, O.P., 1992, Acid rain and its effect on streamwater quality on Catoctin Mountain, Maryland: USGS Open-File Report 92-168, Water Fact Sheet, 2 p.

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FY 1991

Carter, Virginia, Rybicki, N.B., and Hammerschlag, Richard, 1991, Effects of submersed macrophytes on dissolved oxygen, pH, and temperature under different conditions of wind, tide, and bed structure: Journal of Freshwater Ecology, v. 6, no. 2, p. 121-133.

Carter, Virginia, Rybicki, N.B., and Turtora, Michael, 1991, Population dynamics of submersed macrophytes in the tidal Potomac River in Proceedings, 25th annual Meeting, Aquatic Plant Control Research Program: U.S. Army Corps of Engineers, Vicksburg, Mississippi, Misc. Paper A-91-3, p. 41-53.

Erwin, R.M. and J. A. Spendelow. 1991, Colonial wading birds:  herons and egrets, Pages 19.1-19.14 in Steven L. Funderburk, et al., editors. Habitat Requirements for Chesapeake Bay Living Resources, 2nd edition. Chesapeake Bay Program, U.S. Environmental Protection Agency, Annapolis, MD. Various pages.

Gburek, W.J., Urban, J.B., and Schnabel, R.R., 1991, Effects of agricultural land use on contaminated transport in a layered fractured aquifer: Hydrological Basis of Ecologically Sound Management of Soil and Groundwater, IAHS Publ. no. 202

Haramis, G.M. 1991, Canvasback Aythya valisineria . Pages 17.1-17.10 in Steven L. Funderburk, et al., editors. Habitat Requirements for Chesapeake Bay Living Resources, 2nd edition. Chesapeake Bay Program, U.S. Environmental Protection Agency, Annapolis, MD. Various pages.

Haramis, G.M. 1991, Redhead Aythya americana. Pages 18.1-18.10 in Steven L. Funderburk, et al., editors. Habitat Requirements for Chesapeake Bay Living Resources, 2nd edition. Chesapeake Bay Program, U.S. Environmental Protection Agency, Annapolis, MD. Various pages.

Haramis, G.M. 1991, Wood Duck Aix sponsa. Pages 15.1-15.11 in Steven L. Funderburk, et al., editors. Habitat Requirements for Chesapeake Bay Living Resources, 2nd edition. Chesapeake Bay Program, U.S. Environmental Protection Agency, Annapolis, MD.

Heinz, G.H. and S.N. Wiemeyer. 1991, Effects of contaminants on birds. Pages 23-1 to 23-9 in S.L. Funderburk, et al., editors. Habitat Requirements for Chesapeake Bay Living Resources, 2nd edition. Chesapeake Bay Program, U.S. Environmental Protection Agency, Annapolis, MD.

Hirsch, R.M., Alexander, R.B., and Smith, R.A., 1991, Selection of methods for the detection and estimation of trends in water quality: Water Resources Research, v. 27, no. 5, p. 803�3.

Kozar, M.D., Hobba, W.A. Jr, Macy, J.A., 1991, Geohydrology, water availability, and water quality of Jefferson County, West Virginia, with emphasis on the carbonate area: U.S. Geological Survey Water-Resources Investigations Report 90-4118

Krementz, D.G. 1991, American black duck Anas rubripes. Pages 16.1-16.7 in Steven L. Funderburk, et al., editors. Habitat Requirements for Chesapeake Bay Living Resources, 2nd edition. Chesapeake Bay Program, U.S. Environmental Protection Agency, Annapolis, MD.

Krementz, D.G. and G.W. Pendleton. 1991, Movements and survival of American black duck and mallard broods on Chesapeake Bay. Proceedings of the Annual Conference Southeastern Association of Fish and Wildlife Agencies 45:156-166.

Orth, Robert, Moore, Kenneth, Batiuk, Richard, Heasley, Patsy, Dennison, William, Stevenson, J.C., Staver, Lori, Carter, Virginia, Rybicki, Nancy, Kollar, Stan, Hickman, R.E., and Bieber, Steven, 1991, Water quality standards based on species' habitat requirements - a case study from the Chesapeake Bay using submerged aquatic vegetation: in Water Quality Standards for the 21st Century, Proceedings, U.S. EPA Office of Water WH-533, p. 177-181.

Robertson, W.D. Cherry, J.A., and Sudicky, E.A., 1991, Ground-water contamination from two small septic systems of sand aquifers: Ground Water, 29(1), 82-92

Sloto, R.A., Cecil, L.D., and Senior, L.A., 1991, Hydrogeology and ground-water flow in the carbonate rocks of the Little Lehigh Creek Basin, Lehigh County, Pennsylvania: U.S. Geological Survey Water-Resources Investigations Report 90-4076

Williams, J.H., 1991, Tributary-stream infiltration in Marsh Creek Valley, north-central Pennsylvania: U.S. Geological Survey Water-Resources Investigations Report 90-4052

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FY 1990

Carter, Virginia, and Rybicki, Nancy, 1990, Light attenuation and submersed macrophyte distribution in the tidal Potomac River and Estuary: Estuaries, v. 13, no. 4, p. 441-452.

Jenter, H.S., Rybicki, N.B., Baltzer, R.B., and Carter, Virginia, 1990, Tidal mass exchange between a submerged aquatic vegetation bed and the main channel of the Potomac River: Proceedings 1991 Hydraulic Conference, American Society of Civil Engineers, Nashville, Tennessee, p. 298-304.

Sloto R.A., 1990, Geohydrology and simulation of ground-water flow in the carbonate rocks of the valley creek basin, eastern Chester County, Pennysylvania: U.S. Geological Survey Water-Resources Investigations Report 89-4169

Szpakiewicz, M., 1990, Application of natural isotopes in groundwater for solving environmental problems: National Institute for Petroleum and Energy Research DE90000223

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FY 1989

Becher, A.E., 1989, Geohydrology and water quality in the vicinity of the Gettysburg National Military Park and Eisenhower National Historic Site, Pennsylvania: U.S. Geological Survey Water-Resources Investigations Report 89-4154

Bricker, O.P. and Rice, K.C., 1989, Acidic deposition to streams: A geology-based method predicts their sensitivity: Environmental Science & Technology, vol. 23, no. 4, p. 379-385

Carter, Virginia, Rybicki, N.B., Jones, R.C., Barko, J.W., Dresler, P.V., Hickman, R.E., and Anderson, R.T., 1989, Data on physical, chemical and biological data and characteristics of Hydrilla beds, mixed beds, and unvegetated sites in the tidal Potomac River, Maryland and Virginia, 1987: U.S. Geological Survey Open-File Report 88-709, 196 p.

Cohn, T.A., Delong, L.L., Gilroy, E.J., Hirsch, R.M., and Wells, D.K., 1989, Estimating constituent loads: Water Resources Research, v. 25, no. 5, p. 937�2.

Shultz, D.J., 1989, Nitrogen Dynamics in the Tidal Freshwater Potomac River, Maryland and Virginia, Water Years 1979-81 , Water Supply Paper 2234-J, 41 p.

Stickel, L. F. 1989, Home range behavior among box turtles (Terrapene c. carolina)of a bottomland forest in Maryland. Journal of Herpetology 23(1):40-44.

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FY 1988

Barko, J.W., Godshalk, G.L., Carter, Virginia, and Rybicki, N.B., 1988, Effects of submersed aquatic macrophytes on physical and chemical properties of surrounding water: Department of the Army Waterways Experiment Station Technical Report A-99-11, 28 p.

Blanchard, Stephen F., 1988, Dissolved Silica in the Tidal Potomac River and Estuary , 1979-81 Water Years—A Water-Quality Study of the Tidal Potomac River and Estuary: U.S. Geological Survey Water-Supply Paper 2234-H, 48 p.

Brown, L., Pavich, M.J., Hickman, R.E., Klein, J., and Middleton, R., 1988, Erosion of the eastern United States observed with 10Be: Earth Surface Processes and Landforms, v. 13, no. 5, p. 441�7.

Carter, Virginia, Barko, John W., Godshalk, G.L., and Rybicki, Nancy B., 1988, Effects of Submersed Macrophytes on Water Quality in the Tidal Potomac River, Maryland, Journal of Freshwater Ecology, v. 4, p. 493-501.

Cohen, R.R.H., 1988, Phytoplankton dynamics of the fresh, tidal Potomac River, Maryland, for the summers of 1979 to 1981 , U.S. Geological Survey Water-Supply Paper 2234-C, 34pp.

Fleming, W.J., J.J. Momot, and M.S. Ailstock. 1988, Bioassay for phytotoxicity of toxicants to sago pondweed. Pages 431-440 in M.T. Lynch and E. Krome, editors. Understanding the Estuary: Advances in Chesapeake Bay Research. Chesapeake Research Consortium, Publication 129, Solomons, MD. 629 pp.

Geissler, P.H. 1988, Alternative sampling strategies for a survey of submerged aquatic vegetation in the Chesapeake Bay.Pages 138-146 in M.T. Lynch and E. Krome, editors. Understanding the Estuary: Advances in Chesapeake Bay Research. Chesapeake Research Consortium, Publication 129, Solomons, MD. 629 pp.

Glenn, Jerry L., 1988, Bottom Sediments and Nutrients in the Tidal Potomac System, Maryland and Virginia: U.S. Geological Survey Water-Supply Paper 2234-F, 74 p.

Ohlendorf, H.M. and W.J. Fleming. 1988, Birds and environmental contaminants in San Francisco and Chesapeake Bays. Marine Pollution Bulletin 19(9):487-495.

PA Rural Clean Water Program Coordinating Committee, Lancaster County Local Coordinating Committee, Comprehensive Monitoring and Evaluation Commitee, 1988, Rural clean water program 1988 anual progress report: U.S. Department of Agriculture Agricultural Stabilization and Conservation Service.

Perry, M.C. and F.M. Uhler. 1988, Food habits and distribution of wintering canvasbacks, Aythya valisineria, on Chesapeake Bay, Estuaries 11(1):57-67.

Rybicki, Nancy, Anderson, R.T., and Carter, Virginia, 1988, Data on the distribution and abundance of submersed aquatic vegetation in the tidal Potomac River and transition zone of the Potomac Estuary, Maryland, Virginia and the District of Columbia, 1987: U.S. Geological Survey Open-File Report 88-307

Simon, N.S., 1988, Nitrogen Cycling between Sediment and the Shallow-Water Column in the Transitition Zone of the Potomac River and Estuary. I Nitrate and Ammonium Fluxes : Estuarine, Coastal and Shelf Science, v.26, p.483-497.

Williams, J.H., and Senko, G.E., 1988, Simulation of ground water flow in aquifers along the Susquehanna River in Coulmbia County, Pennsylvania: U.S. Geological Survey Water-Resources Investigations Report 85-4185

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