Harry Valentine
Title: Research Forester
Unit: Climate, Fire, and Carbon Cycle Sciences
Address: Northern Research Station
271 Mast Road
Durham, NH 03824
Phone: 603-868-7671
E-mail: Contact Harry Valentine
Jump to Publications
Education
- B.S., College of Agriculture and Environmental Science, Rutgers University, 1970.
- M.F., School of Forestry and Environmental Studies, Yale University, 1972.
- Ph.D., Graduate School, Yale University, 1982.
Civic & Professional Affiliations
- Member, Society of American Foresters.
- Research Affiliate, School of Forestry and Environmental Studies, Yale University
Current Research
For the past 20 years, I have pursued lines of research in forest modeling and forest sampling. Under the first line, I am currently investigating, with colleagues, how to best model the co-allocation of carbon and nitrogen its effect on the net primary productivity of forest ecosystems. I am also pursuing analogous modeling research at the level of the individual tree, with the aim of determining how this co-allocation affects the growth rate of a tree and tree's interactions with its neighbors. The goal is to gain a fundamental understanding of the processes and resource limitations that govern forest stand dynamics. Under the sampling line of research, I am investigating Monte Carlo approaches to sampling the carbon components of the forest with randomly placed lines and points. This sampling research is also conducted with the aid of colleagues. Our objective is the advancement of sampling strategies that not only provide accurate and unbiased estimates of carbon stocks and their rates of change, but also are easy to use in the field.
Why is This Important
Our ability to answer pressing questions about the cycling of carbon through forests suffers from a lack of applicable theory, models, and methodology.
Future Research
The two lines of research will evolve with incremental advances and, with luck, the occasional quantum leap.
Featured Publications
Additional
Online Publications
- Gove, Jeffrey H.; Ducey, Mark J.; Valentine, Harry T.; Williams, Michael S. 2012. A distance limited method for sampling downed coarse woody debris. Forest Ecology and Management. 282: 53-62.
- Valentine, Harry T.; Makela, Annikki. 2012. Modeling forest stand dynamics from optimal balances of carbon and nitrogen. New Phytologist. 194: 961-971.
- Valentine, Harry T.; Makela, Annikki; Green, Edward J.; Amateis, Ralph L.; Makinen, Harri; Ducey, Mark J. 2012. Models relating stem growth to crown length dynamics: application to loblolly pine and Norway spruce. Trees. 26(1): 469-478.
- Dewar, Roderick; Franklin, Oskar; Makela, Annikki; McMurtrie, Ross E.; Valentine, Harry T. 2009. Optimal function explains forest responses to global change. BioScience. 59(2): 127-139.
- Valentine, Harry T.; Affleck, David L. R.; Gregoire, Timothy G. 2009. Systematic sampling of discrete and continuous populations: sample selection and the choice of estimator. Canadian Journal of Forest Research. 39: 1061-1068.
- Ducey, Mark J.; Valentine, Harry T. 2008. Direct sampling for stand density index. Western Journal of Applied Forestry. 23(2): 78-82.
- Valentine, Harry T.; Gove, Jeffrey H.; Ducey, Mark J.; Gregoire, Timothy G.; Williams, Michael S. 2008. Estimating the carbon in coarse woody debris with perpendicular distance sampling. Chapter 6. In: Hoover, Coeli M., ed. Field measurements for forest carbon monitoring: A landscape-scale approach. New York, NY: Springer Science + Business Media: 73-87.
- Ducey, Mark J.; Williams, Michael S.; Gove, Jeffrey H.; Valentine, Harry T. 2008. Simultaneous unbiased estimates of multiple downed wood attributes in perpendicular distance sampling. Canadian Journal of Forest Research. 38: 2044-2051.
- Valentine, Harry T.; Ducey, Mark J.; Gove, Jeffery H.; Lanz, Adrian; Affleck, David L.R. 2006. Corrections for Cluster-Plot Slop. Forest Science 52(1):55-66
- Makela, Annikki; Valentine, Harry T. 2006. The quarter-power scaling model does not imply size-invariant hydraulic resistance in plants. Journal of Theoretical Biology. 243: 283-285.
- Williams, Michael S.; Valentine, Harry T.; Gove, Jeffery H.; Ducey, Mark J. 2005. Additional results for perpendicular distance sampling. Can. J. For. Res. 35: 961-966.
- Gregoire, Timothy G.; Affleck, David L.R.; Valentine, Harry T. 2005. Conditioning inference on line orientation in line intersect sampling. In: Hobbelstad, K., ed. Forest inventory and planning in Nordic countries. Proceedings of SNS meeting; 2004 September 6-8; Sjusjoun, Norway. NIJOS report 09/05. [Place of publication unknown]: Norwegian Institute of Land Inventory: 121-129.
- Affleck, David L.R.; Gregoire, Timothy G.; Valentine, Harry T. 2005. Design unbiased estimation in line intersect sampling using segmented transects. Environmental and Ecological Statistics. 12(1): 39-154.
- Affleck, David L. R.; Gregoire, Timothy G.; Valentine, Harry T. 2005. Edge Effects in Line Intersect Sampling With. Journal Agricultural, Biological, and Environmental Statistics 10:460-477
- Ducey, Mark J.; Gove, Jeffrey H.; Valentine, Harry T. 2004. A walkthrough solution to the boundary overlap problem. Forest Science. 50(4): 427-435.
- Gregoire, Timothy G.; Valentine, Harry T. 2003. Line intersect sampling: Ell-shaped transects and multiple intersections. Environmental and Ecological Statistics. 10: 263-279
- Ducey, M. J.; Jordan, G. J.; Gove, J. H.; Valentine, H. T. 2002. A practical modification of horizontal line sampling for snag and cavity tree inventory. Canadian Journal of Forest Research 32:1217-1224
- Gove, Jeffrey H.; Ducey, Mark J.; Valentine, Harry T. 2002. Multistage point relascope and randomized branch sampling for downed coarse woody debris estimation. Forest Ecology and Mangement. 155: 153-162.
- Valentine, Harry T. 2002. Randomized branch sampling. In: El-Shaarawi, Abdel H.; Piegorsch, Walter, W., eds. Encyclopedia of Environmetrics, Volume 3 M-R: John Wiley & Sons, Ltd. 1682-1684.
- Valentine, Harry T.; Gove, Jeffrey H.; Gregoire, Timothy G. 2001. Monte Carlo approaches to sampling forested tracts with lines or points. Canadian Journal of Forest Research. 31: 1410-1424.
- Makela, Annikki; Valentine, Harry T. 2001. The ratio of NPP to GPP: evidence of change over the course of stand development. Tree Physiology. 21: 1015-1030.
- Gove, Jeffrey H.; Valentine, Harry T.; Holmes, Michael J. 2000. A field test of cut-off importance sampling for bole volume. In: Hansen, Mark; Burk, Tom, eds. Integrated tools for natural resources inventories in the 21st century. Gen. Tech. Rep. NC-212. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 372-376.
- Green, Edwin J.; MacFarlane, David W.; Valentine, Harry T. 2000. Assessing uncertainty in mechanistic models. In: Hansen, Mark; Burk, Tom, eds. Integrated tools for natural resources inventories in the 21st century. Gen. Tech. Rep. NC-212. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 501-506.
- Hollinger, D.Y.; Goltz, S.M.; Davidson, E.A.; Lee, J.T.; Tu, K.; Valentine, H.T. 1999. Seasonal patterns and environmental control of carbon dioxide and water vapour exchange in an ecotonal boreal forest. Global Change Biology. 5: 891-902.
- Valentine, Harry T.; Furnival, George M.; Gregoire, Timothy G. 1991. Confidence intervals from single observations in forest research. Forest Science. 37(1): 370-373.
- Valentine, Harry T. 1983. An approach to modeling the consequences of beech mortality from beech bark disease. In: Proceedings, I.U.F.R.O. Beech Bark Disease Working Party Conference; 1982 September 26-October 8; Hamden, CT. Sponsored by the USDA Forest Service, Northeastern Forest Experiment Station. Gen. Tech. Rep. WO-37. [Washington, DC]: U.S. Department of Agriculture, Forest Service: 134-137.
- Valentine, Harry T. 1978. Estimating Defoliation of Hardwoods Using Blade-petiole Relations. Res. Pap. NE-405. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5p.
- Campbell, Robert W.; Valentine, Harry T. 1972. Tree condition and mortality following defoliation by the gypsy moth. Res. Pap. NE-236. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 331 p.
Other Publications by Harry Valentine *
*Due to policy or copyright restrictions, we are unable to provide full-text versions of these publications. Please check with your local library or Contact Harry Valentine to inquire about reprints.
Last Modified:
02/15/2012