Accession Number : ADA299591

Title :   Floristic Index for Establishing Assessment Standards: A Case Study for Northern Ohio.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Personal Author(s) : Andreas, Barbara K. ; Lichvar, Robert W.

PDF Url : ADA299591

Report Date : AUG 1995

Pagination or Media Count : 89

Abstract : The purpose of this report was to adapt the existing Wilhelm method (Swink and Wilhelm 1979, 1994) for evaluating the reference standard for species occurrences at reference wetlands and other vegetated habitats as a method to evaluate natural places by providing a floristic quality assessment index. This report contains a floristic checklist that is applicable to 31 counties in northern Ohio. The quality index ratings presented here are intended to both assist regional efforts to establish reference standards for species occurrence in wetlands and evaluate natural places in this region. The modem native flora of northern Ohio is composed of a mixture of taxa that became established after the melting of the last Wisconsinan ice advance, about 16,000 BP (Goldthwait 1959). The native flora of this part of glaciated Ohio resulted from (a) the northward migration of species that survived south of the glacial moraine (Delcourt and Delcourt 1981), (b) the establishment in suitable habitats of northern plants that had migrated southward into Ohio in front of the glacial advance, (c) the eastward extension of prairie plants and plants more typical of drier areas that occurred during the Xerothermic Period 8,000 - 5,000 years BP (Benninghoff 1964), and (d) the westward migration of coastal species via eastward drainage channels that formed in the St. Lawrence lowlands as the ice front retreated (Andreas 1989).

Descriptors :   *CASE STUDIES, *WASTE DISPOSAL, *HAZARDOUS WASTES, *HABITATS, *HAZARDOUS MATERIALS, *PLANTS(BOTANY), COASTAL REGIONS, OHIO, DRAINAGE, QUALITY, STANDARDS, MIGRATION, INDEXES, RATINGS, NORTH(DIRECTION), WETLANDS, CHANNELS(WATERWAYS).

Subject Categories : Solid Wastes Pollution and Control
      Water Pollution and Control
      Geology, Geochemistry and Mineralogy
      Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE