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Zooplankton avoidance and reduced grazing responses to Gymnodinium splendens (Dinophyceae) 1
Author(s) -
Fiedler Paul C.
Publication year - 1982
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1982.27.5.0961
Subject(s) - dinoflagellate , dinophyceae , gymnodinium , zooplankton , red tide , bloom , algae , biology , herbivore , ecology , oceanography , phytoplankton , geology , nutrient
A dense subsurface layer of Gymnodinium splendens, a feature often observed in coastal waters off southern California, was actively avoided by macrozooplankton. Filtration rates, measured by uptake of tracer amounts of radiocarbon‐labeled diatoms, and ingestion rates, measured by gut fullness, of some herbivorous species were significantly reduced within the layer. These behavioral responses may help explain the formation and persistence of dinoflagellate blooms such as red tides in coastal waters often dominated by diatoms with higher maximum growth rates.