PreprintCited by 14Fish Ecology and Management StudiesFreshwater macroinvertebrate diversity and ecologyHydrology and Sediment Transport Processes

Poor correlation between large-scale environmental flow violations and freshwater biodiversity: implications for water resource management and water planetary boundary

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Mohan, Chinchu, Gleeson, Tom, Famiglietti, James S., Virkki, Vili, Kummu, Matti, Porkka, Miina, Huggins, Xander, Wang-Erlandsson, Lan +2 more·2022·Hydrology and earth system sciences

Preprint — published as 10.5194/hess-26-6247-2022 · Paper page

Abstract

The freshwater ecosystems around the world are degrading, such that maintaining environmental flow (EF) in river networks is critical to their preservation. The relationship between streamflow alterations and, respectively, EF violations, and freshwater biodiversity is well established at the scale of stream reaches or small basins (~<100 km²). However, it is unclear if this relationship is robust at larger scales even though there are large-scale initiatives to legalize the EF requirement. Moreover, EFs have been used in assessing a planetary boundary for freshwater. Therefore, this study intends to carry out an exploratory evaluation of the relationship between EF violation and freshwater biodiversity at globally aggregated scales and for freshwater ecoregions. Four EF violation indices (severity, frequency, the probability to shift to violated state, and probability to stay violated) and seven independent freshwater biodiversity indicators (calculated from observed biota data) were used for correlation analysis. No statistically significant negative relationship between EF violation and freshwater biodiversity was found at global or ecoregion scales. While our results thus suggest that streamflow and EF may not be an only determinant of freshwater biodiversity at large scales, they do not preclude the existence of relationships at smaller scales or with more holistic EF methods (e.g., including water temperature, water quality, intermittency, connectivity etc.) or with other biodiversity data or metrics.

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Authors
Mohan, C., Gleeson, T., Famiglietti, J. S., Virkki, V., Kummu, M., Porkka, M., Huggins, X., Wang-Erlandsson, L., Gerten, D., & Jähnig, S. C.
Affiliations
  • University of Victoria (CA)
  • University of Saskatchewan (CA)
  • Aalto University (FI)
  • Royal Swedish Academy of Sciences (SE)
  • Stockholm Resilience Centre (SE)
  • Stockholm University
  • Leibniz Association (DE)
  • Humboldt-Universität zu Berlin (DE)
Corresponding author
Mohan, Chinchu
Venue
Hydrology and earth system sciences
Publisher
Wiley
Published
2022-03-01
Volume
26
Issue
23
Pages
6247-6262
ISSN
1027-5606 (ISSN-L)
OpenAlex
W4311237449
Cited by
14
References
88
Citations by year
2026: 2 · 2025: 3 · 2024: 3 · 2023: 1 · 2022: 3 · 2021: 2
FWCI
1.69
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Hydrology and earth system sciences (publishedVersion, cc-by)
  • Aaltodoc (Aalto University) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • UVic’s Research and Learning Repository (University of Victoria) (submittedVersion)
  • HARVEST (University of Saskatchewan) (submittedVersion, cc-by)
  • RENATE (submittedVersion, cc-by-nc-nd)
  • Publication Database PIK (Potsdam Institute for Climate Impact Research (PIK)) (submittedVersion, cc-by)
  • RENATE (cc-by)
Funders
  • European Commission (HORIZON2020, 819202, 743080, ERC-2016-ADG)
  • Academy of Finland (819202, 317320, 339834)
  • Aalto-Yliopisto
  • Canada First Research Excellence Fund
  • IKEA Foundation
  • Leibniz-Gemeinschaft
Topics
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Fish Ecology and Management Studies
  • Physical Sciences › Environmental Science › Ecology › Freshwater macroinvertebrate diversity and ecology
  • Physical Sciences › Environmental Science › Ecology › Hydrology and Sediment Transport Processes
Keywords
environmental flows, freshwater biodiversity, streamflow change, freshwater ecoregions, water resources management, biodiversity indicators

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