Thomas, D. L., D. C. Perry, R. O. Evans, F. T. Uzuno, K. C. Stone, and J. W. Gilliam. 1995. Agricultural drainage effects on water quality in Southeastern U.S. Journal of Irrigation and Drainage Engineering 121(4):277-282.

Titus, J. G., et al. 1991. Greenhouse effect and sea level rise: the cost of holding back the sea. Coastal Management 19:171–210.

Townsend, P. A. 2001. Relationships between vegetation patterns and hydroperiod on the Roanoke River floodplain, North Carolina. Plant Ecology 156:43–58.

Trombulak, S. C., and C. A. Frissell. 2000. Review of ecological effects of roads on terrestrial and aquatic communities. Conservation Biology 14:18–30.

Turner, M. G. 1989. Landscape ecology: the effect of pattern on process. Ann. Rev. Ecol. Syst. 20:171–197.

Turner, R. E., and N. N. Rabalais. 1991. Changes in Mississippi River water quality this century. BioScience 41:140–147.

Turner, S. F., and H. E. Skibitzke. 1952. Use of water by phreatophytes in a 2000-foot channel between Granite Reef and Gillespie Dams, Maricopa County, Arizona. Transactions of the American Geophysical Union 33:66–72.


U.S. Department of Agriculture (USDA). 1997. Census of agriculture, volume 1: part 51, chapter 2. Washington, DC: USDA National Agricultural Statistics Service.

USDA Natural Resources Conservation Service (USDA NRCS). 1998. State of the Land. Land Cover/Use. http://www.nhq.nrcs.usda.gov/land/index/cover_use.html, 18 Nov. 1998.

USDA, NRCS. 2001a. Chinese privet, Ligustrum sinense. Plants Database (http://plants.usda.gov/plants/). Baton Rouge, LA: National Plant Data Center.

USDA, NRCS. 2001b. Plants Database (http://plants.usda.gov/plants/). Baton Rouge, LA: National Plant Data Center.

USDA Forest Service (USFS). 1993. Forest ecosystem management: an ecological, economic and social assessment. 1993-793-071. Washington, DC: U.S. Government Printing Office.

USDA Forest Service. 1999. Notice: Authorization of livestock grazing activities on the Sacramento grazing allotment, Sacramento Ranger District, Lincoln National Forest, Otero County, NM. Federal Register 64:24132.

U.S. Department of the Interior Bureau of Land Management (BLM) and USDA Forest Service (USFS). 1994. Rangeland reform ’94 draft environmental impact statement. Washington, DC:

U.S. Department of the Interior Bureau of Land Management and USDA Forest Service.


Van Dorp, D., and P. F. M. Opdam. 1987. Effects of patch size, isolation and regional abundance on forest bird communities. Landscape Ecology 1:59–73.

Verme, L. J., and W. F. Johnston. 1986. Regeneration of northern white cedar deeryards in upper Michigan. J. Wildl. Manage. 50:307–313.

Verry, E. S., J. S. Hornbeck, and D. A. Dolloff. 2000. Riparian management in forests of the eastern United States. New York: Lewis Publishers. 402 pp.


Warren, R. S., and W. A. Niering. 1993. Vegetation change on a northeast tidal marsh: interaction of sea-level rise and marsh accretion. Ecology 74:96–103.

Wauchope, R. D. 1978. The pesticide content of surface water draining from agricultural fields – a review. J. Environmental Quality 7:459–472.

Wear, D. N., M. G. Turner, and R. O. Flamm. 1996. Ecosystem management with multiple owners: landscape dynamics in a southern Appalachian watershed. Ecological Applications 64(4):1173–1188.

Webb, R. H., and H. G. Wilshire, eds. 1983. Environmental effects of off-road vehicles: impacts and management in arid regions. New York: Springer-Verlag.

Wilcove, D. S., D. Rothstein, J. Bubow, A. Phillips, and E. Losos. 1998. Quantifying threats to imperiled species in the United States. BioScience 48:607–615.



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