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Bioavailability And Trophic Transfer Of Humic-Bound Copper From Bacteria To Zooplankton, Emile M. Lores, Jonathan Pennock
Bioavailability And Trophic Transfer Of Humic-Bound Copper From Bacteria To Zooplankton, Emile M. Lores, Jonathan Pennock
School of Marine Science and Ocean Engineering
ABSTRACT:
The effect of humic acid (HA) on uptake and transfer of Cu by selected marine organisms from the microbial loop was determined. Bacteria grown with and without 15 µg Cu l-1 and with and without 10 mg Suwannee River Humic Acid (SRHA) l-1 were fed to Uronema sp. The Uronema were subsequently fed to Acartia tonsa to determine the effect of humic acid on the uptake and transfer of Cu from bacteria to copepods. The presence of 10 mg SRHA l-1 reduced Cu uptake in A. tonsa by an average of 54% and significantly reduced the …