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Nonconsumptive Mortality; Enzymatic-Activity; Attached Bacteria; Midsummer Decline; Crustacean Zooplankton; Daphnia-Galeata; Eutrophic Lake; Chesapeake Bay; Diatom Bloom; Dynamics
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Full-Text Articles in Life Sciences
Microbial Activities Accompanying Decomposition Of Cladoceran And Copepod Carcasses Under Different Environmental Conditions, Kw Tang, Sl Bickel, C Dziallas, Hp Grossart
Microbial Activities Accompanying Decomposition Of Cladoceran And Copepod Carcasses Under Different Environmental Conditions, Kw Tang, Sl Bickel, C Dziallas, Hp Grossart
VIMS Articles
Cladoceran and copepod carcasses in both marine and freshwater environments represent concentrated reservoirs of organic substrates for water column bacteria. We studied the microbial abundance, activities, and diversity associated with decomposing carcasses of different zooplankton species over short and long time scales, and in oligotrophic vs. eutrophic environments. Fresh carcasses of Daphnia cucullata, Diaphanosoma brachyurum, and Eudiaptomus gracilis were rapidly colonized by bacteria, which reached peak abundances within 1.5 d at 20 degrees C and then decreased. Cell-specific exoenzymatic activity on protein and lipid analogs and production rate of bacteria associated with the carcasses were all higher than in the …