Zooplankton production in the Bay of Quinte 1975-2008: relationships with primary production, habitat, planktivory, and aquatic invasive species (Dreissena spp. and Cercopagis pengoi).
作者： Ora E. Johannsson , Kelly L. Bowen
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摘要: The Bay of Quinte, a long, shallow, high-phosphorus system in Lake Ontario, spans trophic range from eutrophic (upper Bay) to meso-oligotrophic (mouth). Phosphorus control (PC) and the invasion dreissenid mussels Cercopagis pengoi have influenced its biology environment. We elucidated principal drivers behind zooplankton production pre-PC times present (1975–2008). Production abundant species was calculated using egg-ratio method. estimates were improved by determining system-specific production/biomass (P/B) relationships for rarer species. Planktivory governed initially, likely preventing response PC. With changes fish community, increased. Thereafter, structure size shifts predatory arena associated with changing light penetration, temperature, addition C. pengoi — all within general context nutrient availability...
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