SYMPOSIA PAPER Published: 01 January 1985

Comparison of Environmental Effect and Biotransformation of Toxicants on Laboratory Microcosm and Field Microbial Communities


The proper identification and laboratory analyses of relevant in situ parameters for determining the environmental effect and fate of toxicants in coastal wetlands are important components in validating laboratory microcosm procedures. Measurements of microbial density, phosphatase and dehydrogenase activity, adenosine triphosphate (ATP), fluorescin diacete hydrolysis, and the mineralization of toxicant parent molecules were evaluated both in the environment and under laboratory microcosm simulation for different pH/Eh, salinity, temperature, and sediment/water interface conditions. High correlations were established between control microcosms and field measurements. Fate and effect predictions were compared with field estimates for several toxicants.

Author Information

Portier, RJ
Louisiana State University, Baton Rouge, LA
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Developed by Committee: E47
Pages: 14–30
DOI: 10.1520/STP35251S
ISBN-EB: 978-0-8031-4930-4
ISBN-13: 978-0-8031-0433-4