Spatiotemporal Patterns and Assembly Processes of Benthic Macroinvertebrate Communities in River Reaches of Different Geomorphic Types in Sichuan Province, China
Geomorphic setting and seasonal variation shape benthic macroinvertebrate communities, but their effects on community patterns and assembly processes remain unclear. We surveyed 49 sites across seven Sichuan rivers during spring and autumn 2025. Reaches were classified as Mountain, Hilly, or Plain. Principal coordinate...