Spatial autocorrelation patterns of stream invertebrates: exogenous and endogenous factors

摘要: Aim  To investigate spatial autocorrelation of taxonomic stream invertebrate groups (richness and composition) at a large geographical scale to analyse the importance exogenous endogenous factors. Location  The Mediterranean Basin. Methods  For factors, we used large-scale factors related climate, geology river zonation; for dispersal mode each group. After describing analysing patterns genus richness composition in Basin, computed Moran’s I before after accounting it factors. Results  In relation richness, most did not show significant autocorrelation, suggesting that no main or were important local-scale probably controlling richness. contrast, composition, all except Odonata had environment. environment, still but decreased with their increasing ability (from Crustacea Coleoptera). Thus, strongest potential is mainly whereas weaker combination factors. Main conclusions  Our results illustrate as an factor causing suggest ignoring can lead misunderstandings when explaining community patterns.