Some Characteristics of an Oscillatoria-Dominated Metalimnetic Phytoplankton Community
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Citation:The Ohio Journal of Science. v73, n5 (September, 1973), 297-307
Crystal Lake, located in Crawford County, Pennsylvania, is a small dimictic lake which during summer stratification contains a large population of Oscillatoria agardhii var. isothrix Skuja in the metalimnetic region. Carbon fixation measurements indicate that this Oscillatoria-dominated community is capable of relatively rapid rates of photosynthesis at low levels of illumination. Analyses of dissolved oxygen, carbon dioxide, phosphate, calcium, iron, manganese, phosphorus, zinc, and chlorophyll a were made on water and seston samples from a vertical water column near the center of the lake. The results of some of these analyses indicate that increased availability of trace nutrients may be involved in the occurrence of the Oscillatoria-dominated community.
Author Institution: Department of Biology, Allegheny College, and Pymaluning Laboratory, Department of Biology, University of Pittsburgh
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