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BOTTOMLAND HARDWOODS IN THE TIFTON-VIDIALIA UPLAND OF GEORGIA: A CONCEPTUAL MODEL FOR ECOLOGICAL RISK ASSESSMENT
Citation:
Lowrance, R. AND G. Vellidis. BOTTOMLAND HARDWOODS IN THE TIFTON-VIDIALIA UPLAND OF GEORGIA: A CONCEPTUAL MODEL FOR ECOLOGICAL RISK ASSESSMENT. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-93/186 (NTIS PB93234540), 1993.
Description:
Ecology risk assessment provides a methodology for evaluating threats to ecosystem function associated with environmental perturbations or stressors. his report documents the development of a conceptual model for assessing the ecological risk to the water quality function (WQF) of bottomland hardwood riparian ecosystems (BHRE) in the Tifton-Vidalia upland (TVU) ecoregion of Georgia. revious research has demonstrated that mature BHRE are essential to maintaining water quality in this portion of the coastal plain. he WQF of these ecosystems is considered an assessment endpoint - an ecosystem function or set of functions hat society chooses to value as evidenced by laws, regulations, or common usage. he water quality function of BHRE is at risk because of the physical, and biological stressors related to nonpoint source pollution from adjacent land uses, especially agriculture; the conversion of BHRE to other land uses; and the encroachment of domestic animals into BHRE. otential chemical, physical, and biological stressors to BHRE are identified, and the methodology for evaluating appropriate exposure scenarios is discussed.
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BOTTOMLAND HARDWOODS IN THE TIFTON-VIDIALIA UPLAND OF GEORGIA: A CONCEPTUAL MODEL FOR ECOLOGICAL RISK ASSESSMENT