Disentangling responses to natural stressor and human impact gradients in river ecosystems across Europe
Date published
2021-11-01
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Authors
Stubbington, Rachel
Sarremejane, Romain
Laini, Alex
Cid, Núria
Csabai, Zoltán
England, Judy
Munné, Antoni
Aspin, Thomas
Bonada, Núria
Bruno, Daniel
Cauvy-Fraunie, Sophie
Chadd, Richard
Dienstl, Claudia
Fortuño Estrada, Pau
Graf, Wolfram
Gutiérrez-Cánovas, Cayetano
House, Andy
Karaouzas, Ioannis
Kazila, Eleana
Millán, Andrés
Morais, Manuela
Pařil, Petr
Pickwell, Alex
Polášek, Marek
Sánchez-Fernández, David
Tziortzis, Iakovos
Várbíró, Gábor
Voreadou, Catherina
Walker-Holden, Emma
White, James C.
Datry, Thibault
Sarremejane, Romain
Laini, Alex
Cid, Núria
Csabai, Zoltán
England, Judy
Munné, Antoni
Aspin, Thomas
Bonada, Núria
Bruno, Daniel
Cauvy-Fraunie, Sophie
Chadd, Richard
Dienstl, Claudia
Fortuño Estrada, Pau
Graf, Wolfram
Gutiérrez-Cánovas, Cayetano
House, Andy
Karaouzas, Ioannis
Kazila, Eleana
Millán, Andrés
Morais, Manuela
Pařil, Petr
Pickwell, Alex
Polášek, Marek
Sánchez-Fernández, David
Tziortzis, Iakovos
Várbíró, Gábor
Voreadou, Catherina
Walker-Holden, Emma
White, James C.
Datry, Thibault
Supervisor/s
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley
Department
Course name
Type
Article
ISSN
0021-8901
Format
Citation
Stubbington R, Sarremejane R, Laini A, et al., (2022) Disentangling responses to natural stressor and human impact gradients in river ecosystems across Europe, Journal of Applied Ecology, Volume 59, Issue 2, February 2022, pp. 537-548
Abstract
- Rivers are dynamic ecosystems in which both human impacts and climate-driven drying events are increasingly common. These anthropogenic and natural stressors interact to influence the biodiversity and functioning of river ecosystems. Disentangling ecological responses to these interacting stressors is necessary to guide management actions that support ecosystems adapting to global change.
- We analysed the independent and interactive effects of human impacts and natural drying on aquatic invertebrate communities—a key biotic group used to assess the health of European freshwaters. We calculated biological response metrics representing communities from 406 rivers in eight European countries: taxonomic richness, functional richness and redundancy, and biomonitoring indices that indicate ecological status. We analysed metrics based on the whole community and on a group of taxa with traits promoting resistance and/or resilience (‘high RR’) to drying. We also examined how responses vary across Europe in relation to climatic aridity.
- Most community metrics decreased independently in response to impacts and drying. A richness-independent biomonitoring index (the average score per taxon; ASPT) showed particular potential for use in biomonitoring, and should be considered alongside new metrics representing high RR diversity, to promote accurate assessment of ecological status.
- High RR taxonomic richness responded only to impacts, not drying. However, these predictors explained little variance in richness and other high RR metrics, potentially due to low taxonomic richness. Metric responsiveness could thus be enhanced by developing region-specific high RR groups comprising sufficient taxa with sufficiently variable impact sensitivities to indicate ecological status.
- Synthesis and applications. Metrics are needed to assess the ecological status of dynamic river ecosystems—including those that sometimes dry—and thus to identify priority sites requiring action to tackle the causes of environmental degradation. Our results inform recommendations guiding the development of such metrics. We propose concurrent use of richness-independent ‘average score per taxon’ indices and metrics that characterize the richness of resistant and resilient taxa. We observed interactions between aridity, impacts and drying, highlighting that these new metrics should be region specific, river type specific and adaptable, promoting their ability to inform management actions that protect biodiversity in river ecosystems responding to climate change.
Description
Software Description
Software Language
Github
Keywords
bioassessment, biomonitoring, flow intermittence, intermittent river, macroinvertebrate, multiple stressors, resistance and resilience, temporary stream
DOI
Rights
Attribution 4.0 International
Funder/s
European Cooperation in Science and Technology. Grant Number: CA15113