Tennessee

Impacts of Eastern Hemlock Mortality on Southern Appalachian Ecosystem Reference karyotype and cytomolecular maps are pre-requisite tools for extensive genome research. ...more...	Southern Appalachian Trout Distribution in a Warmer Climate In the Southern Appalachians, native brook trout and introduced rainbow and brown trout are highly prized for their existence and for recreational fishing. ...more...	Restoration of Degraded Shortleaf Pine Ecosystems Interactions among past land use, fire exclusion, drought, and southern pine beetle have caused substantial pine mortality and degradation of pine/hardwood stands in the southern Appalachians. ...more...
GIS Model of Non-Breeding Range of Cerulean Warbler Freshwater mussel populations are often small and fragmented due to stream and landscape degradation. Isolated populations are highly vulnerable to natural disturbance. ...more...	Predicting Acorn Production Acorn crop sizes vary considerably among oak species, years, and places. This affects oak regeneration and wildlife species that depend on acorns for food. ...more...	Figured Wood and the Practice of Sustainable Forestry The birdseye grain pattern in sugar maple is a rare yet valuable variation of this important timber species. ...more...
Advanced Technology Used to Monitor Forest Change Many forest changes are lost in the background at a distance, but an isolated change may be part of a broader pattern when viewed from afar. ...more...	Initial Estimates of Hurricane Katrina’s Impacts on Mississippi Gulf Coast Forest Resources Hurricane Katrina pummeled the gulf coast of Mississippi in late summer, 2005. Damage assessment was an immediate priority for Federal, State, and local governments as they sought to mitigate damages to resources in the counties heavily impacted by the storm. ...more...	Data Query Tool for Invasive Plant Inventory on FIA Plots In 2001, the SRS Forest Inventory and Analysis (FIA) program started systematically surveying FIA plots for the presence and relative abundance of more than 25 non-native invasive plants. ...more...
Timber Product Output (TPO) in the South in 2005 The South’s forest industry is a multi-billion dollar economic engine that employs hundreds of thousands of employees across the region. ...more...	Use of FIA Data to Identify Ivory-Billed Woodpecker Habitat In April 2004, when the ivory-billed woodpecker was observed in the Big Woods region of eastern Arkansas, search teams began canvassing selected areas believed to be the most suitable habitat for this species that had been listed as extinct for several decades. ...more..	Differences between African American and Hispanic Visitation to National Forests Recent data from the Forest Service's on-site National Visitor Use Monitoring Survey (NVUM) shows that visits made by African Americans ...more...
Southern Biofuels Assessment Program Woody biomass is primarily a raw material for either structural wood-based composites or as a thermal feedstock for the generation of energy. ...more..	Recreation Visits to Wilderness and Primitive Areas Station researchers, using data from the Census, the National Visitor Use Monitoring Project, and the National Survey on Recreation and the Environment developed models to examine national participation and use of wilderness and primitive areas for outdoor recreation. ...more...	National Leader in Recreation Research For over 30 years the Forest Service and the Recreation Research Unit in Athens, Georgia has been a recognized leader in forming partnerships to address needs for information and technology to support better policy and management of public lands. ...more...

Other Accomplishments

• Researchers Target Gypsy Moth and Oak Decline—SRS researchers are evaluating silvicultural treatments to address gypsy moth infestations and oak decline in and around the Daniel Boone National Forest. (read the details)
• If it is good for softwoods is it good for hardwoods?—Curve sawing is not new to the softwood industry, but it is to the hardwood industry. (read the details)
• Nutrient, Carbon, and Water Cycling in Southern Appalachian Ecosystems—Sustaining or restoring the capacity of forest ecosystems to provide ecosystems services such as high water quality, carbon storage, and biodiversity is increasingly important. (read the details)
• Cerulean Warbler Habitat Creation—Kentucky contains important breeding populations of Cerulean Warbler. (read the details)
• Restoration of Degraded Shortleaf Pine Ecosystems—Interactions among past land use, fire exclusion, drought, and southern pine beetle have caused substantial pine mortality and degradation of pine/hardwood stands in the southern Appalachians. (read the details)
• Forest Inventory and Analysis—Researchers in the FIA unit have been conducting annual inventories in cooperation with the Georgia Forestry Commission since 1998. (read the details)

Research Accomplishments in Tennessee

Impacts of Eastern Hemlock Mortality on Southern Appalachian Ecosystems

Hemlock woolly adelgid (HWA) is a non-native invasive pest that impacts eastern and Carolina hemlocks. First reported in the 1950s in the Northeast, HWA has spread to the Southern Appalachian region of northern Georgia, western North Carolina, and southern Virginia. Without control, hemlocks typically die within about five years after infestation. Neither natural predators nor host resistance have stopped the spread. Hemlocks serve important ecological roles in the Southern Appalachians. They are a keystone species in riparian areas, providing critical habitat for birds and other animals, and shading streams to maintain cool water temperatures required by trout and other aquatic organisms. We quantified the impacts of hemlock mortality on hydrological process and predict that annual transpiration will be reduced by 10 percent, and winter and spring transpiration by 30 percent. We expect increases in streamflow and soil moisture may subsequently impact nutrient and carbon cycling processes.  It is likely that no other species will fill the ecohydrological role of eastern hemlock if widespread mortality occurs. Chelcy Ford (cford@fs.fed.us)
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Southern Appalachian Trout Distribution in a Warmer Climate

In the Southern Appalachians, native brook trout and introduced rainbow and brown trout are highly prized for their existence and for recreational fishing. Distribution of wild trout is limited by temperature and is expected to be limited further by a warmer climate. Southern Station scientists produced a regional map of current wild trout habitat and developed models to project future distributions over a range of increased temperature. If predictions of the Hadley Global Circulation Model (GCM) are assumed, temperature in this region would increase by 2.3o C and approximately 53 percent of trout habitat would be lost. If the more extreme Canadian GCM prediction of a 5.5o C temperature increase is used, 97 percent would be lost. Fragmentation would increase, leaving populations in small isolated patches vulnerable to extirpation because recolonization is unlikely. Patricia A. Flebbe (pflebbe@fs.fed.us)
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Restoration of Degraded Shortleaf Pine Ecosystems

Interactions among past land use, fire exclusion, drought, and southern pine beetle have caused substantial pine mortality and degradation of pine/hardwood stands in the southern Appalachians. Land managers are now challenged with the task of (1) reducing wildfire risk from widespread dead, fallen, and dying trees, (2) restoring beetle-killed forests, and (3) reducing the potential for development of stand conditions that promote increased fire risk. Land managers need information on management options that will accomplish these three goals in cost effective and practical ways. We studied the effectiveness of prescribed fire as a restoration tool in degraded shortleaf pine/bluestem ecosystems and determined that while understory burning does not adversely impact water quality, long-term site productivity, or forest floor dwelling macroinvertebrates, fire alone is not sufficient to create conditions required to regenerate shortleaf pine or increase bluestem abundance. Our current research is examining the effectiveness of more aggressive treatments, such as felling dead pines prior to burning, followed by planting shortleaf pine seedlings and seeding warm season grasses. Katherine Elliott (kelliot@fs.fed.us)
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GIS Model of Non-Breeding Range of Cerulean Warbler

The footprint of mountaintop removal coal mining in its breeding range and of coffee production in its nonbreeding range mark cerulean warbler as a species for whom integration of land management, conservation, and productive economic activity will be essential to future existence. By bringing together a large group of experts in geographic information systems and bird biology to analyze existing distribution records and relate them in a rigorous way to data on land forms, climate, and vegetation in the northern Andes, the members of El Grupo Cerúleo, subcommittee of the Cerulean Warbler Technical Group, produced a hypothetical distribution of this important and representative species in South America. We pooled results of five different modeling approaches into a combined, consensus hypothesis of distribution. The strength of the hypothesis is that it can be tested with detailed fieldwork and improved through evaluation. Paul B. Hamel (phamel@fs.fed.us)
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Predicting Acorn Production

Acorn crop sizes vary considerably among oak species, years, and places. This affects oak regeneration and wildlife species that depend on acorns for food.  However, use of different methods to index acorn crop size makes comparisons among States difficult.  Bent Creek scientists partnered with the North Carolina Wildlife Resources Commission (NCWRC) to share expertise and data.  They used 21 years of acorn data from visual surveys conducted by the NCWRC in western North Carolina, to develop predictive equations for hard mast indices based on the proportion of trees bearing acorns.  The proportion of trees bearing acorns can be used as a stand-alone index of acorn production, as well.  By substituting this faster and simpler survey method over the labor-intensive counting of twigs and acorns used in some other visual survey methods, land managers can use the time savings to sample more trees to improve hard mast index accuracy. Katie Greenberg (kgreenberg@fs.fed.us)
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Figured Wood and the Practice of Sustainable Forestry

The birdseye grain pattern in sugar maple is a rare yet valuable variation of this important timber species. A recent Station publication reviewed birdseye grain in sugar maple and suggested how this highly prized commodity can increase options for sustainable forestry and made a number of management recommendations. First, land managers should be able to recognize birdseye maples in the field, either as standing timber or before the logs are fully processed. This will help ensure that economic losses do not result from mistakenly discarded or underutilized timber. Second, residual timber containing figured wood should be carefully protected to avoid loss of tree quality following logging. Third, management of the residual timber may need to be modified to help ensure continued production of birdseye, which in turn may prove more compatible with certain silvicultural strategies such as managing for old-growth-like conditions. Many of the lessons learned on birdseye maple also apply to other figured grains, such as curly grains or burlwood. Don Bragg (dbragg@fs.fed.us)
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Advanced Technology Used to Monitor Forest Change

Many forest changes are lost in the background at a distance, but an isolated change may be part of a broader pattern when viewed from afar. Finding a proper balance between detail and perspective challenges those who monitor forest conditions over broad areas. Station scientists at the Eastern Forest Environmental Threat Assessment Center have teamed up with NASA’s Stennis Space Center, Oak Ridge National Laboratory, and other FS technology centers to develop an early warning system that uses multiple sensors operating at multiple scales. Advanced computer algorithms on supercomputers create a composite map every eight days.  Every 500 square-meter pixel in the map is categorized using explicit information about topography and climate in addition to MODIS values.  By comparing a pixel with its previous states, one can detect unexpected transitions. Multiple shifts or a recognizable pattern could trigger additional examination by specialized airborne sensors or ground crews.   NASA is currently testing hyperspectral sensors for this purpose. William H. Hargrove (whargrove@fs.fed.us)
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Initial Estimates of Hurricane Katrina’s Impacts on Mississippi Gulf Coast Forest Resources

Hurricane Katrina pummeled the gulf coast of Mississippi in late summer, 2005. Damage assessment was an immediate priority for Federal, State, and local governments as they sought to mitigate damages to resources in the counties heavily impacted by the storm.  Within months of the storm, SRS Forest Inventory and Analysis (FIA) field crews assisted by field staff from southern State forestry agencies initiated a re-inventory of Mississippi’s forests.  The highest priority of this re-inventory was the collection of data on resource damage in affected counties in the lower part of the State. FIA worked with individuals from the Mississippi Forestry Commission, Mississippi Institute for Forest Inventory to analyze initial results of data collection in six southeastern counties that were heavily impacted by Hurricane Katrina.  Researchers found that there was damage in a large proportion of plots, but that the number of individual trees damaged was limited. Overall, hardwoods suffered more damage than softwoods.  The initial findings were published in a brochure, available online and in print. The document was made available to State and Federal legislators. Sonja Oswalt (soswalt@fs.fed.us)
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Data Query Tool for Invasive Plant Inventory on FIA Plots

In 2001, the SRS Forest Inventory and Analysis (FIA) program started systematically surveying FIA plots for the presence and relative abundance of more than 25 non-native invasive plants. Because this information has been collected regionally, the data have not been publicly available through the national FIA data Web site. However, a new tool that has been made available through the SRS FIA Web site (http://srsfia2.fs.fed.us)/nonnative_invasive/Southern_Nonnative_Invasives.htm) now enables users of FIA data to access data on non-native invasive plant occurrence on forestland by county.  Other details also are provided to enable knowledgeable individuals to map, model, and analyze these regional observations in combination with tree, forest condition, and plot attributes from the national FIA Web site.  Potential users include the US Geological Survey’s National Biological Information Infrastructure and the National Institute of Invasive Species Science, FS Forest Health Protection and other Federal agencies, The Nature Conservancy’s NatureServe, and State and regional exotic pest plant councils. Ray Sheffield (rsheffield@fs.fed.us) and Ted Ridley (tridley@fs.fed.us)
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Timber Product Output (TPO) in the South in 2005

The South’s forest industry is a multi-billion dollar economic engine that employs hundreds of thousands of employees across the region.  In most southern States, forest industry ranks in the top three manufacturers of industrial products.  The southern States account for nearly 60 percent of the Nation’s total timber product output.  The SRS Forest Inventory and Analysis (FIA) unit and the State forestry agencies across the South have completed the 2005 forest industry surveys for roundwood harvest and consumption in the southern US. The study shows that industrial TPO in the southern States jumped from 8.2 to 8.7 billion cubic feet between 2003 and 2005. Softwood product output was up 6 percent to 6.4 billion cubic feet and accounted for nearly three-quarters of total product output.  In August, the 2005 TPO data was made available at the FIA website, at http://srsfia2.fs.fed.us)/php/tpo2/tpo.php. This information will be used not only by the State forestry agencies but also by forest industry analysts and economists, university personnel, and individuals interested in how the forest resource is being utilized. The annual Southern Pulpwood report for 2005 has been published.  Individual State-level TPO assessments for 2005 will be published during the next FY. Tony Johnson (tjohnson09@fs.fed.us)
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Use of FIA Data to Identify Ivory-Billed Woodpecker Habitat

In April 2004, when the ivory-billed woodpecker was observed in the Big Woods region of eastern Arkansas, search teams began canvassing selected areas believed to be the most suitable habitat for this species that had been listed as extinct for several decades.  The extensive data previously collected by the SRS Forest Inventory and Analysis (FIA) program helped to inform the search by providing content for assessments of where the best habitat was likely to occur.  This information is the basis for the point-based and probability surface maps that are being used to develop guidance for the search efforts.  Plans are underway to build habitat filter models (empirical and literature based) that are tied to habitat attributes in the FIA data, such as forest type, stand age, stand-size class, basal area of live trees, damage index, tree density, and individual tree data (species code, diameter, total height, cull, damage type, decay class code). Ray Sheffield (rsheffield@fs.fed.us)
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Examination of Differences between African American Visitation to National Forests in the South and Hispanic Visitation to National Forests in the Southwest

Recent data from the Forest Service’s on-site National Visitor Use Monitoring Survey (NVUM) shows that visits made by African Americans to national forests in the South account for very low visitation percentages in the region. This is surprising given that African Americans are highly concentrated in the South, and that both rural and urban black populations live proximal to national forests in several southern States.  In contrast, Hispanic visits to national forests in the Southwest are high, relative to their population proportion. We examined additional national level household data from the National Survey on Recreation and the Environment (NSRE) relating to awareness of Federal lands and management to help understand the discrepancy between Hispanic and Black recreational use of Federal lands.  We hypothesized that awareness of Federal agencies, knowledge of management objectives, and attitudes about user fees would explain Black/Hispanic visitation differences; however, strong differences remained after accounting for these factors. To help understand these differences, more precise data may be obtained from both institutional and personal factors, including regional differences in agency support for visitor diversity; sub-cultural values as they relate to wild land places; and private land ownership in each region for the respective groups. C. Y. Johnson (cjohnson09@fs.fed.us)
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Southern Biofuels Assessment Program

Woody biomass is primarily a raw material for either structural wood-based composites or as a thermal feedstock for the generation of energy. One of the ways energy can be recovered from wood is by a thermochemical process in which wood particles are subjected to extremely high temperatures in an anaerobic environment. This process yields synthesis gas (“syngas”) that is a mixture of methane, hydrogen, carbon monoxide, and carbon dioxide.  Syngas can be used as a gaseous fuel or as the starting material in a secondary reaction that yields liquid transportation fuels such as ethanol, gasoline, or diesel. There exists two basic obstacles to the production of bioenergy from woody biomass:  (1) the lack of information regarding the chemical and physical composition of woody biomass from southern forests and plantations; (2) lack of efficient conversion technologies. Southern Research Station scientists are undergoing an extensive study over the next 5-year period that will investigate three areas of bioenergy research. The first area will be woody raw material characterization, done in conjunction with other work such as forest genetics, tree breeding and physiology research with genomics technology to determine the effects of specific genes and gene combinations on bioenergy traits and overall feedstock performance.  Secondly, we will evaluate the efficacy of various conversion techniques (gasification, pyrolysis, fermentation) in relation to the chemical/physical composition of the woody biomass. Finally, we will evaluate the impact of biomass removals on fuels loading, soil quality, water quality, and forest ecosystem health. Les Groom (lgroom@fs.fed.us)
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Recreation Visits to Wilderness and Primitive Areas

Station researchers, using data from the Census, the National Visitor Use Monitoring Project, and the National Survey on Recreation and the Environment developed models to examine national participation and use of wilderness and primitive areas for outdoor recreation. Their findings corroborated previous studies suggesting that racial minorities, immigrants, urbanites, and females participate less in primitive area recreation. In related work, they examined the relationship between visitation and personal, structural, and psychological constraints to wildland recreation use. Seventeen structural, personal, and psychological constraints related to health, facilities, socioeconomic standing, and other personal factors were examined using regression methods. Results revealed minorities, women, lower levels of income and education, and elderly populations were more likely to perceive they were significantly constrained from visiting wilderness.  Using Census data and estimated models, the researchers projected future participation and use in order to assess recreation pressure on wildlands.  In general, their findings indicate that over the next 40 years, wildland recreation users and use will increase but at a rate less than general population growth.  In fact, per capita participation in wildland recreation is expected to drop more than 15 percent.  Nevertheless, when combined with a nearly 50 percent increase expected in the general population, a net increase in participants of about 25 percent and about a 20 percent increase in wildland site visits annually.  Furthermore, if management and acculturation can influence a reduction in perceived constraints by certain demographics, the increases are likely to be greater. The increase in site visits combined with a dwindling amount of wildland acreage due to development pressures  will present challenges to land managers and to the Agency’s goal of providing  high-quality outdoor recreation opportunities while sustaining natural system quality. J. M. Bowker (mbowker@fs.fed.us)
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National Leader in Recreation Research

For over 30 years the Forest Service and the Recreation Research Unit in Athens, Georgia has been a recognized leader in forming partnerships to address needs for information and technology to support better policy and management of public lands.  This on-going partnership has involved multiple Federal agencies, State associations, private associations and universities.  Projects have included the Federal Estate Visitors Survey, the Public Area Recreation Visitors Survey, the Customer Use Survey, the National Visitor Use Monitoring Survey, the National Recreation Survey, and most recently the National Survey on Recreation and the Environment (NSRE).  The NSRE involves the Forest Service, National Oceanic and Atmospheric Administration, the Environmental Protection Agency, the United States Coast Guard, the National Park Service, the Bureau of Land Management, other Federal agencies, the National Association of Recreation Resource Planners, the University of Georgia, the University of Tennessee, and the State University of New York. H. Ken Cordell (kcordell@fs.fed.us)
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Other Accomplishments

Researchers Target Gypsy Moth and Oak Decline

 

SRS researchers are evaluating silvicultural treatments to address gypsy moth infestations and oak decline in and around the Daniel Boone National Forest. This large-scale project promotes collaboration with partners; provides information on tree species and response to treatments, and ideas to improve oak regeneration; and demonstrates low-impact harvesting operations, and prescribed burning techniques necessary to sustain oak woodland conditions. In collaboration with the University of Kentucky, a long-term research project on the use of prescribed fire to enhance oak regeneration was initiated in 2001.
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If it is good for softwoods is it good for hardwoods?

Curve sawing is not new to the softwood industry, but it is to the hardwood industry. This technique helps to maximize lumber yield when sawing non-straight logs. While there is a potential tradeoff with maximizing value produced, which is a prime concern for the hardwood industry, both volume and value should be considered. Scientists at the Southern Research Station and Virginia Tech have been examining this technique and the advantages for hardwood mill operators and consumers.
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Nutrient, Carbon, and Water Cycling in Southern Appalachian Ecosystems

Sustaining or restoring the capacity of forest ecosystems to provide ecosystems services such as high water quality, carbon storage, and biodiversity is increasingly important. Southern Research Station scientists have quantified a key component of carbon cycling (soil CO2 flux) across a range of forest age classes and determined that cycling rates were highest in the mid-successional forest relative to both younger and old-growth forests. This work provides the science to guide sustainable management activities in the southern Appalachians.
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Cerulean Warbler Habitat Creation

Kentucky contains important breeding populations of Cerulean Warbler. SRS scientists are designing studies to develop methods to produce Cerulean Warbler habitat in the context of economically viable management of forest lands in Kentucky, as well as methods to conduct reclamation of Mountaintop Removal with Valley Fill mining sites to produce habitats for the species after extraction has been completed. The work is coordinated through the Cerulean Warbler Technical Group and involves collaboration with the Daniel Boone National Forest and the Appalachian Regional Reforestation Initiative.
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Restoration of Degraded Shortleaf Pine Ecosystems

Interactions among past land use, fire exclusion, drought, and southern pine beetle have caused substantial pine mortality and degradation of pine/hardwood stands in the southern Appalachians. Land managers now face many problems, including fuel buildup and restoring beetle-killed forests. Southern Research Station scientists studied the effectiveness of prescribed fire as a restoration tool in these degraded shortleaf pine/bluestem ecosystems. This research indicates that fire is a valuable tool, but may likely need supplementation by other, more aggressive means, such as planting shortleaf pine seedlings and grasses.
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Forest Inventory and Analysis

Researchers in the FIA unit have been conducting annual inventories in cooperation with the Georgia Forestry Commission since 1998. A total of $549,898 was provided to the State for annual inventory field data collection. A five-year report is being developed. Inventory data is available electronically through 2005.
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