Causes, Responses, and Implications of Anthropogenic versus Natural Flow Intermittence in River Networks

Thibault Datry, Amélie Truchy, Julian D. Olden, Michelle H. Busch, Rachel Stubbington, Walter K. Dodds, Sam Zipper, Songyan Yu, Mathis L. Messager, Jonathan D. Tonkin, Kendra E. Kaiser, John C. Hammond, Eric K. Moody, Ryan M. Burrows, Romain Sarremejane, Amanda G. Delvecchia, Megan L. Fork, Chelsea J. Little, Richard H. Walker, Annika W. WaltersDaniel Allen

Research output: Contribution to journalReview articlepeer-review

19 Scopus citations

Abstract

Rivers that do not flow year-round are the predominant type of running waters on Earth. Despite a burgeoning literature on natural flow intermittence (NFI), knowledge about the hydrological causes and ecological effects of human-induced, anthropogenic flow intermittence (AFI) remains limited. NFI and AFI could generate contrasting hydrological and biological responses in rivers because of distinct underlying causes of drying and evolutionary adaptations of their biota. We first review the causes of AFI and show how different anthropogenic drivers alter the timing, frequency and duration of drying, compared with NFI. Second, we evaluate the possible differences in biodiversity responses, ecological functions, and ecosystem services between NFI and AFI. Last, we outline knowledge gaps and management needs related to AFI. Because of the distinct hydrologic characteristics and ecological impacts of AFI, ignoring the distinction between NFI and AFI could undermine management of intermittent rivers and ephemeral streams and exacerbate risks to the ecosystems and societies downstream.

Original languageEnglish (US)
Pages (from-to)9-22
Number of pages14
JournalBioScience
Volume73
Issue number1
DOIs
StatePublished - Jan 1 2023

All Science Journal Classification (ASJC) codes

  • General Agricultural and Biological Sciences

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