Non-perennial segments in river networks
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Autor/a
Datry, Thibault
Boulton, Andrew J.
Fritz, Ken
Stubbington, Rachel
Crabot, Julie
Tockner, Klement
Data de publicació
2023-11-23ISSN
2662-138X
Resum
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.
Tipus de document
Article
Versió del document
Versió acceptada
Llengua
Anglès
Matèries (CDU)
574 - Ecologia general i biodiversitat
Pàgines
54
Publicat per
Springer Nature
Publicat a
Nature Reviews Earth & Environment
Citació
Datry, Thibault, Andrew J. Boulton, Ken M. Fritz, Rachel Stubbington, Núria Cid, Julie Crabot, and Klement Tockner. 2023. “Non-Perennial Segments in River Networks.” Nature Reviews Earth & Environment 4 (12): 815–30. https://doi.org/10.1038/s43017-023-00495-w.
Número de l'acord de la subvenció
EC/H2020/869226/EU/Securing biodiversity, functional integrity and ecosystem services in DRYing rivER networks/DRYvER
Programa
Aigües Marines i Continentals
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