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JOURNAL OF PLANKTON RESEARCH | VOLUME 5 | NUMBER 6 | PAGES 865-879 | 1983
© Oxford University Press

research-article

Fine-scale spatial patterns in the coastal epiplankton off southern California

Paul C. Fiedler1

Scripps Institution of Oceanography La Jolla, CA 92093, USA

Received on January 1, 1983; accepted on June 1, 1983

Fine-scale vertical (5 – 40 m) and horizontal (50 – 500 m) patterns of temperature, chlorophyll and abundance of zooplankton species were sampled with a pump filtration system in the surface waters offshore of San Diego in May and October, 1978. Intense and consistent patterns were most apparent in vertical profiles. Herbivorous zooplankton were more consistently associated with the estimated primary productivity maximum than with the deeper chlorophyll maximum layer, which represented a phytoplankton biomass maximum. Predators were positively correlated with abundant potential prey species. Variations in body length with depth suggest that these fine-scale patterns were sufficiently stable to influence zooplankton growth. Consequences for grazing and predator – prey interactions in pelagic ecosystems are discussed.

1Present address: NOAA/NMFS Southwest Fisheries Center, PO Box 271, La Jolla, CA 92038, USA


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