Dispersal capacity shapes responses of river island invertebrate assemblages to vegetation structure, island area, and flooding

摘要: 1. Riparian invertebrate communities occupy a dynamic ecotone where hydrogeomorphological (e.g. river flows) and ecological succession) processes may govern assemblage structure by filtering species according to their traits dispersal capacity, niche). 2. We surveyed terrestrial assemblages (millipedes, carabid beetles, spiders) in 28 islands across four catchments over two years. predicted that distinct niches would produce taxon-specific responses of abundance richness to: i) disturbance from episodic floods, ii) island area, iii) vegetation iv) landscape structure. also differ species’ ability (aerial vs only), indicating migration was sustaining community 3. Invertebrate affected different combinations structure, area flood capacity. Carabid related negatively particularly for flightless species, but the other taxa were insensitive this disturbance. Larger supported greater carabids all invertebrates able disperse aerially. Vegetation tree canopy density plant richness, positively aerial dispersers, whereas disperser cover. Landscape did not influence or abundance. 4. Multiple riparian assemblages. Overall insensitivity contingent on mode imply spatial dynamics subsidize through immigration. Particular habitat features trees, speciose vegetation) provide refuges concentration food resources.