Estuarine macrobenthos in Calcasieu Lake,Louisiana: Community and trophic structure |
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| Authors: | Gary R Gaston DeAnna L Lee Jeanne C Nasci |
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| Institution: | 1. Department of Biological and Environment Sciences, McNeese State University, 70609, Lake Charles, LA
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| Abstract: | Macrobenthic assemblages in Calcasieu Lake estuary (Louisiana) were sampled at 11 sites from October 1983 through November 1985. The sites were numerically dominated by subsurface-deposit feeders, consisting mostly of polychaetes. Greater densities of macrofauna were collected at the northern (upper) stations of the lake than were collected in West Cove or the southern stations. Abundances of polychaetes, oligochaetes, and amphipods at the upper lake stations accounted for most of the differences among stations. The numerical dominance by detritivores (97% of the fauna) and lack of strong sediment or salinity gradients across the estuary, resulted in an absence of temporal pattern in trophic structure of the macrofauna. |
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