Modelling the hydraulic preferences of benthic macroinvertebrates in small European streams

摘要: Summary 1. Relating processes occurring at a local scale to the natural variability of ecosystems larger requires design predictive models both orientate stream management and predict effects disturbances such as climate changes. Our study contributes this effort by providing detailed hydraulic preferences 151 invertebrate taxa, mostly identified species level. We used an extensive data set comprising 580 samples collected using Surber net from nine sites second third order streams during one, two or three surveys each site. nested non-linear mixed relate taxon densities bed shear stresses estimated FliesswasserStammTisch hemisphere numbers. 2. An average model taxon, i.e. independent surveys, globally explained 25% density variations taxa within surveys. A quadratic relationship existed between niche breadth indicating that preferring extreme numbers had reduced breadth. more complete model, where vary across 38% variation Variations in were weak for numbers. 3. There was significant taxonomic effect on computed model. By contrast, season, site, number survey covariates did not consistently explain shifts surveys. 4. The obtained well correlated those additional sets other regions. consistency regions supports use regional preference curves estimating impact river communities. breadths different related.