Connectivity‐Driven Assembly of Trichoptera Metacommunities Across River Networks With Different Drying Patterns

作者：Dorottya Hárságyi, David Cunillera‐Montcusí, Márk Ficsór, Núria Bonada‬‬‬‬‬‬‬‬‬‬‬, Thibault Datry, Annika Künne, Marko Miliša, Louise Mimeau, Petr Pařil, Bálint Pernecker, Pál Boda, Arnold Móra, Zoltán Csabai · 发表于：Freshwater Biology · 年份：2025 · DOI：10.1111/fwb.70053 · 被引用次数：3 · 研究领域：Freshwater macroinvertebrate diversity and ecology、Fish Ecology and Management Studies、Species Distribution and Climate Change

ABSTRACT Spatial connectivity varies temporally due to fragmentation caused by drying and may potentially define the diversity and composition of communities. We studied spatiotemporal patterns in three drying river networks (DRNs) in Croatia, Czechia and Hungary, with varying drying patterns, focusing on the roles of local environmental variables and regional influences. We aimed to assess how variation in spatiotemporal connectivity (STcon) influenced metacommunity structure and dynamics, contributing to our understanding of rapidly changing aquatic ecosystems under climate change. We used a unique hydrological dataset with a novel approach to quantify spatiotemporal connectivity across three DRNs spanning different time windows (30, 200, 365, 730, 1825 and 3650 days before sampling). These values summarised how much drying each site had been exposed to at different time scales. Then, we estimated the correlation between these STcon values and local (i.e., environmental variables) and regional (i.e., spatial arrangement) metrics using hierarchical variance partitioning. Local environmental variables were consistently strongly associated with drying patterns, with regional influences playing a secondary but important role. Both local and regional‐scale variables showed similar patterns across all DRNs. STcon values were also significantly associated with metacommunity assembly, but, in contrast, differences in drying patterns altered the relative importance of STcons calcula...