Abstract
Although it has been shown that the structure and taxonomic composition of macroinvertebrate communities vary depending on multiple spatial scales, multi-scale variation of community functional composition has not been examined; despite the fundamental role of this functional composition for many ecosystem processes. In this study, functional composition of macroinvertebrate communities, in terms of the relative abundances of the different functional feeding groups, was examined in two streams in Central Spain. Differences in functional composition were found at every scale, but mostly at the segment, riffle, and sample scales, as previously observed for other community characteristics. This study highlights the necessity of multiscale designs for the study of ecological patterns and processes in streams.
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