Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Impact of Drilling Fluids on Seagrasses: An Experimental Community Approach.
Author Morton, R. D. ; Duke, T. W. ; Macauley, J. M. ; Clark, J. R. ; Price, W. A. ;
CORP Author University of West Florida, Pensacola. Dept. of Biology.;Environmental Research Lab., Gulf Breeze, FL.
Year Published 1985
Report Number EPA/600/D-85/121;
Stock Number PB85-212124
Additional Subjects Drilling fluids ; Sea grasses ; Water pollution ; Exposure ; Growth ; Chlorophylls ; Decomposition ; Losses ; Invertebrates ; Leaves(Botany) ; Microcosms ; Thalassia
Library Call Number Additional Info Location Last
NTIS  PB85-212124 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 28p
Effects of a used drilling fluid on an experimental seagrass community (Thalassia testudinum) were measured by exposing the community to the suspended particulate phase (SPP) in laboratory microcosms. Structure of the macroinvertebrate assemblage, growth and chlorophyll content of grass and associated epiphytes, and rates of decomposition as indicated by weight loss of grass leaves in treated and untreated microcosms were compared. There were statistically significant differences in community structure and function among untreated microcosms and those receiving the clay and drilling fluid. For example, drilling fluid and clay caused a significant loss in the number of the ten most numerically abundant (dominant) macroinvertebrates, and drilling fluid decreased the rate at which Thalassia leaves decomposed.