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Effects Of Diet On Release Of Dissolved Organic And Inorganic Nutrients By The Copepod Acartia Tonsa, Grace K. Saba, Deborah K. Steinberg, Deborah A. Bronk
Effects Of Diet On Release Of Dissolved Organic And Inorganic Nutrients By The Copepod Acartia Tonsa, Grace K. Saba, Deborah K. Steinberg, Deborah A. Bronk
VIMS Articles
Acartia tonsa copepods are not limited to herbivory and can derive up to half their daily ration from predation on heterotrophic ciliates and dinoflagellates. The effects of an omnivorous diet on nutrient regeneration, however, remain unknown. In this study, we fed A. tonsa an exclusively carnivorous diet of either (1a) heterotrophic dinoflagellate Oxyrrhis marina or (1b) Gyrodinium dominans, (2) an exclusively herbivorous diet of Thalassiosira weissflogii diatoms, or (3) a mixed omnivorous diet. We measured the release rate, composition, and stoichiometry of dissolved organic carbon (DOC), dissolved organic phosphorus (DOP), and nitrogen (urea) in addition to the inorganic nutrients, ammonium …