Environmental Sciences & Ecology
; Water Resources
英文摘要:
Resilience in river ecosystems requires that organisms must persist in the face of highly dynamic hydrological and geomorphological variations. Disturbance events such as floods and droughts are postulated to shape life history traits that support resilience, but river management and conservation would benefit from greater understanding of the emergent effects in communities of river organisms. We unify current knowledge of taxonomic-, phylogenetic-, and trait-based aspects of river communities that might aid the identification and quantification of resilience mechanisms. Temporal variations in river productivity, physical connectivity, and environmental heterogeneity resulting from floods and droughts are highlighted as key characteristics that promote resilience in these dynamic ecosystems. Three community-wide mechanisms that underlie resilience are (a) partitioning (competition/facilitation) of dynamically varying resources, (b) dispersal, recolonization, and recruitment promoted by connectivity, and (c) functional redundancy in communities promoted by resource heterogeneity and refugia. Along with taxonomic and phylogenetic identity, biological traits related to feeding specialization, dispersal ability, and habitat specialization mediate organism responses to disturbance. Measures of these factors might also enable assessment of the relative contributions of different mechanisms to community resilience. Interactions between abiotic drivers and biotic aspects of resource use, dispersal, and persistence have clear implications for river conservation and management. To support these management needs, we propose a set of taxonomic, phylogenetic, and life-history trait metrics that might be used to measure resilience mechanisms. By identifying such indicators, our proposed framework can enable targeted management strategies to adapt river ecosystems to global change.
1.Inst Bio & Geosci, Julich, Germany 2.Irstea Ctr Lyon Villeurbanne, Res Unit RiverLY, River Hydroecol Lab, Villeurbanne, France 3.Oregon State Univ, Dept Integrat Biol, Corvallis, OR 97331 USA 4.Univ Canterbury, Sch Biol Sci, Christchurch, New Zealand 5.Queensland Univ Technol, Sci & Engn Fac, Brisbane, Qld, Australia 6.Australian Rivers Inst, Nathan, Qld, Australia 7.Univ Helsinki, Dept Geosci & Geog, Helsinki, Finland 8.German Ctr Integrat Biodivers Res Halle Jena Leip, Idiv, Deutsch Pl 5E, D-04103 Leipzig, Germany 9.Finnish Environm Inst, Oulu, Finland 10.Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA 11.Univ Canberra, Inst Appl Ecol, Canberra, ACT, Australia 12.Winona State Univ, Dept Biol, Winona, MN 55987 USA 13.Leibniz Inst Freshwater Ecol & Inland Fisheries, Berlin, Germany 14.Irstea Ctr Lyon Villeurbanne, Res Unit RiverLY, DYNAM Lab, Villeurbanne, France 15.Univ Barcelona, Inst Recerca Biodiversitat IRBio, Fac Biol,Dept Biol Evolut Ecol & Ciencies Ambient, Grp Recerca Freshwater Ecol & Management FEM, E-08028 Barcelona, Spain 16.Irstea Bordeaux, Res Unit Aquat Ecosyst & Global Change EABX, Cestas, France 17.Cardiff Univ, Cardiff Sch Biosci, Water Res Inst, Cardiff, S Glam, Wales 18.Univ Waikato, Environm Res Inst, Hamilton, New Zealand
Recommended Citation:
Van Looy, Kris,Tonkin, Jonathan D.,Floury, Mathieu,et al. The three Rs of river ecosystem resilience: Resources, recruitment, and refugia[J]. RIVER RESEARCH AND APPLICATIONS,2019-01-01,35(2):107-120