Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Stautus and temporal trends in benthic macroinvertebrate communities as an indicator of water quality at Maryland's core monitoring stations, 1976-1992.
Author Friedman, E. S.
Other Authors
Author Title of a Work
Friedman, Ellen S.
CORP Author Maryland Dept. of Natural Resources, Annapolis. Monitoring and Non-Tidal Assessment Div.
Publisher Monitoring and Nontidal Assessment Division, Maryland Department of Natural Resources,
Year Published 1996
Report Number CBWP-MANTA-MN-96-1
Stock Number PB98-119241
Additional Subjects Benthos ; Invertebrates ; Biological communities ; Biological indicators ; Water quality ; Maryland ; Species diversity ; River basins ; Sampling ; Statistical analysis ; Environmental monitoring ; Environmental surveys ; Trends ; Index of Biotic Integrity ; Monitoring stations
Library Call Number Additional Info Location Last
NTIS  PB98-119241 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Benthic macroinvertebrate communities have been sampled at 27 of Maryland's CORE monitoring stations since 1976. On average, the benthic samples have been collected annually during the spring to summer months using either a Surber sampler or Fullner modified Hester Dendy multiplate sampler, Using this database of 17 years of benthic information, water quality trends were determined by examining the macroinvertebrate community over time, from 1976 to 1992. Four measures were selected to evaluate the macroinvertebrate community: taxa number; Shannon-Weiner diversity index; modified Hilsenhoff biotic index; and percentage of Ephemeroptera, Plecoptera, Trichoptera (%EPT). These community measures were analyzed for significant correlations with time using non-parametric statistical tests.
"Sponsoring/monitoring agency report number, CBWP-MANTHA-MN 96-1." "References included." "47 p.; ill.: 28cm." "April 1996."