Spatial Distribution and Coexistence Patterns of Caddisfly Larvae (Trichoptera) in a Hungarian Stream
作者： Dénes Schmera
关键词: Null model 、 Biology 、 Aquatic environment 、 Spatial distribution 、 Larva 、 Invertebrate 、 Ecology 、 Species richness 、 Hydrobiology 、 Caddisfly
摘要: It is well known that stream macroinvertebrates usually show aggregated spatial distributions caused by extrinsic factors and interactions among species individuals. In the present study, distribution of caddisfly assemblages coexistence patterns larval (Insecta: Trichoptera) were measured in a Hungarian reach at three different scales. Caddisfly showed aggregated, random regular as variance-mean relationship richness sampling area increased from 0.0225 m2 to 0.2025 m2. The observed indicated (lower diversity unique combinations than expected chance) for distributions. These proved be positive associations particularly belonging same functional feeding group. The caddisflies supported hypothesis microhabitat patches (patchy microhabitat-macroinvertebrate model) and/or biological using resource (hypothesis facilitation) have deterministic effect on assemblages. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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