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RECORD NUMBER: 16 OF 35

OLS Field Name OLS Field Data
Main Title Importance of Physical Scaling Factors to Benthic Marine Invertebrate Recolonization of Laboratory Microcosms.
Author Flemer, D. A. ; Clark, J. R. ; Stanley, R. S. ; Bundrick, C. M. ; Plaia., G. R. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL. ;University of West Florida, Pensacola. Inst. for Statistical and Mathematical Modeling.
Publisher c1993
Year Published 1993
Report Number EPA/600/J-94/114;
Stock Number PB94-155538
Additional Subjects Invertebrates ; Scaling ; Aquatic ecosystems ; Experimental design ; Benthos ; Biological communities ; Estuarine environment ; Toxicity ; Water pollution effects(Animals) ; Sea water ; Flow rates ; Sediments ; Florida ; Santa Rosa Sound ; Responses ; Reprint ; Recolonization ; Microcosms ; Ecological structure ; Ecotoxicological tests ; Molgula ; Didemnum ; Corophium acherusicum ; Bugula neritina ; Cumingia tellinoides ; Laevicardium mortoni
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NTIS  PB94-155538 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/01/1994
Collation 21p
Abstract
Five laboratory studies of benthic macroinvertebrate recolonization were conducted for six-wk periods to evaluate the effects of physical scaling factors (i.e., microcosm size, seawater flow rates and sediment depth) on benthic community structure. Design variables included four open-faced acrylic containers of size 7, 12, 20 and 32 cm sq; seawater flow rate - approximately 0.7 or 1.6 liters/min; and sediment depth of 2.5 or 5.0 cm. Effects of seawater flow rates were more apparent than those related to microcosm size and sediment depth. The various indices usually did not vary significantly with physical scaling factors. These results provide a basis for setting minimum experimental unit parameters and should lead to cost savings through physical scale reduction (depth of sediment and surface area) and less time to process smaller volumes of sediment and generation of smaller waste volumes.