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JOURNAL OF PLANKTON RESEARCH | VOLUME 6 | NUMBER 1 | PAGES 123-135 | 1984
© Oxford University Press

research-article

The relationship of individual algal species to the surface microlayer of a small freshwater pond

Keneth W. Estep1 and Charles C. Remsen2

University of Wisconsin-Milwaukee, Center for Great Lakes Studies P.O. Box 413, Milwaukee, WI 53201, USA

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

Surface microlayer and subsurface algal communities were compared on 14 sample dates over a 5 month period in a small Wisconsin pond. Similarities in species composition indicate that the microlayer community had many species in common with the subsurface community. Relative species abundances, however, were different from surface to subsurface. Analysis of the depth distribution of individual species indicates that the response to the unique physical/chemical conditions in the microlayer is species specific, with flagellates often in low numbers in the surface microlayer as a result of negative phototaxis; and diatoms often in high numbers in the surface microlayer, as a result of a specific physical/chemical affinity. These species specific differences may help to explain phytoneuston enrichment found in other studies.

1Present address: University of Rhode Island, Department of Oceanography, Kingston, R1 02881, USA.

2Author to whom reprint requests should be directed.


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