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Deepwater sediments and trophic conditions in Florida lakes

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Abstract

Sediment cores were taken from near maximum depth in 15 Florida lakes representing a wide range of trophic conditions. Chemical analyses of surface sediments showed Al, Fe, and Ca to be the most abundant elements in all samples, and the ratio of Al to Ca to be smaller for eutrophic lakes. Sediment organic matter increased with trophic state, as did the degree to which it was enriched in nitrogen. Corresponding sediment C/N ratios decreased with increasing lake trophic state and showed significant negative correlation with chlorophylla, total N, and total P in the water column. Concentrations of sedimentary chlorophyll derivatives showed some relation to trophic state but differences in basin morphometry hinder its use as an inter-lake index of chlorophyll production.

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  1. M. S. Flannery

    Present address: Center for Aquatic Weeds, 7922 NW 71st Street, 32606, Gainesville, FL, USA

Authors and Affiliations

  1. Florida State Museum, University of Florida, Gainesville, Florida, USA

    M. S. Flannery, R. D. Snodgrass & T. J. Whitmore

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  1. M. S. Flannery
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  2. R. D. Snodgrass
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  3. T. J. Whitmore
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Flannery, M.S., Snodgrass, R.D. & Whitmore, T.J. Deepwater sediments and trophic conditions in Florida lakes. Hydrobiologia 91, 597–602 (1982). https://doi.org/10.1007/BF02391974

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