Zooplankton community responses to synthetic oil exposure

Conference · Tue Jan 01 00:00:00 EST 1985

OSTI ID:5786199

Hook, L A; Franco, P J; Giddings, J M

The responses of microcosm and pond zooplankton communities to oil treatment were quite similar. Their close agreement lends support for using shallow-water pond microcosms as surrogates for field experiments in hazard evaluation. Changes in cladoceran densities were the most sensitive indicators of stress in the zooplankton communities. Copepods were slightly less sensitive, and rotifers were least sensitive to oil treatment. Indirect effects on populations were observed at intermediate treatment levels. The lowest treatment levels at which persistent and significant ecological changes occurred were the same in both systems. These levels were similar to the lowest observed-effect concentration (LOEC) for the Daphnia magna chronic bioassay, or approximately 30% of the D. magna 48-h LC/sub 50/. Community structure responses were generally consistent between systems; however, sensitivity for detecting oil treatment effects varied greatly among the measures of community structure. Species richness and diversity measures were not as sensitive as individual species responses. Cluster and multivariate post-clustering analyses of community similarity values reflected indirect effects and had sufficient sensitivity to allow early impact detection. An expanded principal components technique, which used both zooplankton and water quality data, was also relatively sensitive and would be applicable for routine monitoring.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5786199
• Report Number(s): CONF-8505158-2; ON: DE86010038
• Resource Relation: Conference: ASTM symposium on community toxicity testing, Colorado Springs, CO, USA, 6 May 1985; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
COAL LIQUIDS
TOXICITY
AQUATIC ECOSYSTEMS
COMMUNITIES
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
MICROCOSMS
PHENOLS
PONDS
ZOOPLANKTON
AQUATIC ORGANISMS
AROMATICS
DATA
ECOSYSTEMS
FLUIDS
HYDROXY COMPOUNDS
INFORMATION
LIQUIDS
NUMERICAL DATA
ORGANIC COMPOUNDS
PLANKTON
SURFACE WATERS
010900* - Coal
Lignite
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