Record Display for the EPA National Library Catalog
RECORD NUMBER: 116 OF 147
|OLS Field Name||OLS Field Data|
|Main Title||Structure and Function of Copper-Stressed Aquatic Microcosms.|
|Author||Hedtke, S. F. ;|
|CORP Author||Environmental Research Lab.-Duluth, Monticello, MN. Monticello Ecological Research Station.|
|Additional Subjects||Toxicity ; Copper ; Aquatic biology ; Water pollution ; Test facilities ; Sediments ; Carbon ; Organic compounds ; Exposure ; Photosynthesis ; Respiration ; Decomposition ; Adaptation ; Tolerances(Physiology) ; Invertebrates ; Insects ; Zooplankton ; Algae ; Analysis of variance ; Primary biological productivity ; Reprints ; Microcosms|
Laboratory aquatic microcosms were established using natural pond sediment and the organisms contained therein. After a 30-day development time, microcosms were exposed on a flow-through basis to six concentrations of copper with six replicates of each concentration. Measures of energy fixation, material cycling, and biological structure were measured periodically over a 32-wk period. Exposure to copper at 9.3 microgram/l and higher resulted in a change in the structure and function of the test systems while 4.0 microgram/l did not cause an effect relative to controls.