Non-perennial segments in river networks.

Autor: Datry T; INRAE, UR RiverLy, Centre Lyon-Grenoble Auvergne-Rhône-Alpes, 5 rue de la Doua CS70077, 69626 Villeurbanne Cedex, France., Boulton AJ; Ecosystem Management, School of Environmental and Rural Science, University of New England, Armidale, 2350, New South Wales, Australia., Fritz K; Office of Research and Development, United States Environmental Protection Agency, 26 West Martin Luther King Drive, Cincinnati, Ohio 45268 USA., Stubbington R; School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK., Cid N; IRTA Marine and Continental Waters Programme, Ctra de Poble Nou Km 5.5, E43540, La Ràpita, Catalonia, Spain.; FEHM-Lab (Freshwater Ecology, Hydrology and Management), Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Universitat de Barcelona (UB), Diagonal 643, 08028 Barcelona, Spain., Crabot J; Université Clermont Auvergne, CNRS, UMR GEOLAB, F-63000 Clermont-Ferrand, France., Tockner K; Senckenberg Society for Nature Research and Faculty of Biological Sciences, Goethe-University, Frankfurt a. M., Germany.
Jazyk: angličtina
Zdroj: Nature reviews. Earth & environment [Nat Rev Earth Environ] 2023 Dec; Vol. 4, pp. 815-830.
DOI: 10.1038/s43017-023-00495-w
Abstrakt: Non-perennial river segments - those that recurrently cease to flow or frequently dry - occur in all river networks and are globally more abundant than perennial (always flowing) segments. However, research and management have historically focused on perennial river segments. In this Review, we outline how non-perennial segments are integral parts of river networks. Repeated cycles of flowing, non-flowing and dry phases in non-perennial segments influence biodiversity and ecosystem dynamics at different spatial scales, from individual segments to entire river networks. Varying configurations of perennial and non-perennial segments govern physical, chemical and ecological responses to changes in the flow regimes of each river network, especially in response to human activities. The extent of non-perennial segments in river networks has increased owing to warming, changing hydrological patterns and human activities, and this increase is predicted to continue. Moreover, the dry phases of flow regimes are expected to be longer, drier and more frequent, albeit with high regional variability. These changes will likely impact biodiversity, potentially tipping some ecosystems to compromised stable states. Effective river-network management must recognize ecosystem services (such as flood risk management and groundwater recharge) provided by non-perennial segments and ensure their legislative and regulatory protection, which is often lacking.
Competing Interests: Competing interests The authors declare no competing interests.
Databáze: MEDLINE
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