A field study of cadmium dynamics in periphyton and in Hyalella azteca (CRUSTACEA: AMPHIPODA). Stephenson, M. & Turner, M., A. Water, Air, & Soil Pollution, 68:341-361, 1993.
A field study of cadmium dynamics in periphyton and in Hyalella azteca (CRUSTACEA: AMPHIPODA) [pdf]Paper  abstract   bibtex   
Abstract, We studied the dynamics of Cd uptake and depuration in epilithic periphyton and in the grazing amphipod Hyalella azteca. Both stable Cd, sufficient to achieve an aqueous concentration of 90 ng L -l, and its radiotracer l~ were added during 1987 to the epilimnion of oligotrophie Lake 382 of the Experimental Lakes Area in northwestern Ontario. Cadmium dynamics within both periphyton and Hyalella were rapid, with equilibrium being approached within two weeks. For periphyton, the Cd uptake rate constant (Kuw) was 3.8 x 104 d ~ with a depuration rate of 0.29 d -~. For Hyalella the deputation rate was 0.36 d -1, 10% due to growth dilution and 90% to excretion or desorption. The total Cd uptake rate (kul) by Hyalella was 6.1 x 104 d -1, with more of the uptake (58%) derived from food (periphyton) than from water. Hyalella assimilated 80% of ingested Cd. Steady-state bio- concentration factors (BCF) were at least 10-fold higher than previously published values for Amphipoda. In periphyton and Hyalella the BCF were 1.2 x 105 and 3.2 x 105, respectively.
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 title = {A field study of cadmium dynamics in periphyton and in Hyalella azteca (CRUSTACEA: AMPHIPODA)},
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 year = {1993},
 pages = {341-361},
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 abstract = {Abstract, We studied the dynamics of Cd uptake and depuration in epilithic periphyton and in the grazing amphipod Hyalella azteca. Both stable Cd, sufficient to achieve an aqueous concentration of 90 ng L -l, and its radiotracer l~ were added during 1987 to the epilimnion of oligotrophie Lake 382 of the Experimental Lakes Area in northwestern Ontario. Cadmium dynamics within both periphyton and Hyalella were rapid, with equilibrium being approached within two weeks. For periphyton, the Cd uptake rate constant (Kuw) was 3.8 x 104 d ~ with a depuration rate of 0.29 d -~. For Hyalella the deputation rate was 0.36 d -1, 10% due to growth dilution and 90% to excretion or desorption. The total Cd uptake rate (kul) by Hyalella was 6.1 x 104 d -1, with more of the uptake (58%) derived from food (periphyton) than from water. Hyalella assimilated 80% of ingested Cd. Steady-state bio- concentration factors (BCF) were at least 10-fold higher than previously published values for Amphipoda. In periphyton and Hyalella the BCF were 1.2 x 105 and 3.2 x 105, respectively.},
 bibtype = {article},
 author = {Stephenson, M. and Turner, M. A.},
 journal = {Water, Air, & Soil Pollution},
 keywords = {CADMIUM,L382,tracers}
}
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