Tilman, D. 2004. Niche tradeoffs, neutrality, and community structure: A stochastic theory of resource competition, invasion, and community assembly. Proceedings of the National Academy of Sciences 101:10854–10861. Tilman, D., and J.A. Downing. 1994. Biodiversity and stability in grasslands. Nature 367:363–365. Tilman, D., P. B. Reich, J. Knops, D. Wedin, T. Mielke, and C. Lehman. 2001. Diversity and productivity in a long-term grassland experiment. Science 294:843–845. Toman, Michael. 1998. Why Not to Calculate the Value of the World’s Ecosystem Services and Natural Capital. Ecological Economics 25: 61–65. Torell, L. A., J. D. Libbin, and M. D. Miller. 1990. The market value of water in the Ogalla Aquifer. Land Economics 66: 163-175. U.S. Department of Agriculture Forest Service. 2004. National Report on Sustainable Forests–2003. Washington DC: United States Department of Agriculture, Forest Service. U.S. Department of Energy. 2007. Natural and Accelerated Bioremedation Research, http://www.lbl.gov/NABIR/index.html (accessed March 2007) U.S. Fish and Wildlife Service. 2002. Candidate Conservation Agreements With Assurances For Non-Federal Property Owners. Washington, DC: Department of the Interior, U.S. Fish and Wildlife Service. U.N. Environmental Program. 1995. Global Biodiversity Assessment UNEP. U.N. Food and Agriculture Organization. 2006. Global Forest Resources Assessment 2005, FAO Forestry Paper 147. Rome. FAO. Walker, D.J., and D.L. Young. 1986. The effect of technical progress erosion damage and economic incentives for soil conservation. Land Economics 62: 83–93. Weitzman, M. 1992. On diversity. Quarterly Journal of Economics 107(2): 363–405. Weitzman, M. 2000. Economic profit versus ecological entropy. Quarterly Journal of Economics 115(1): 237–263. Wells, M., and K.E. Brandon. 1992. People and Parks: Linking Protected Area Management With Local Communities. Washington, DC: The World Bank. Western, D., and R.M. Wright (eds). 1994. Natural Connections: Perspectives in Community-based Conservation. Washington, DC: Island Press. Wilcove, D., D. Rothstein, J. Dubow, A. Phillips and E. Losos. 1998. Quantifying threats to imperiled species in the United States. BioScience 48: 607–615. Wilson, C., and C. Graham. 1983. Exotic Plant Pests and North American Agriculture.: Academic Press. Wilson, E.O. (ed.). 1988. BioDiversity. Washington, DC: National Academy Press.
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