Species and trophic structure of macrozoobenthos community in the different types of littoral zone in mesotrophic lake
V. P. SEMENCHENKO, M. D. MOROZ
Scientific and Practical Centre of the NAS of Belarus for Bioresources, Minsk, Belarus
Keywords: macrozoobenthos, littoral zone, species and trophic structure
Abstract
The article presents the results of study species and trophic structure of macrozoobenthos community in the littoral zone mesotrophic Obsterno Lake (Republic of Belarus) having different macrophyte beds ( Chara , reeds, lily). The results of ANOVA shown the influence of studied biotopes on the number of species and Shennon index. The number of species increased from summer to autumn, but Shennon index was minimal in the middle of summer. The significant differences in species abundance between biotopes obtained for oligochaetes, chironomids, active filter feeders, and predators. There no differences for Ephemeroptera and Trichoptera . The mean values of species similarity for the studied period were 68.9, 74.1, and 70.0 percent for reeds, lily, and Chara , respectively. The trophic similarity between groups were 66.3, 54.1, and 69.7 percent. The significant differences between species and trophic similarity pointed out only for the lily beds. The values of variability species structure during studied period are higher than trophic structure, i. e. trophic structure is more stable to compare with species stru
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