Fluctuating fortunes: Stressor synchronicity and fluctuating intensity influence biological impacts.
anthropogenic impact
asynchronous
ecological realism
experimental design
nonadditive effects
static stressors
synchronous
Journal
Ecology letters
ISSN: 1461-0248
Titre abrégé: Ecol Lett
Pays: England
ID NLM: 101121949
Informations de publication
Date de publication:
Dec 2022
Dec 2022
Historique:
revised:
22
08
2022
received:
13
06
2022
accepted:
07
09
2022
pubmed:
12
10
2022
medline:
26
11
2022
entrez:
11
10
2022
Statut:
ppublish
Résumé
Ecosystems remain under enormous pressure from multiple anthropogenic stressors. Manipulative experiments evaluating stressor interactions and impacts mostly apply stressors under static conditions without considering how variable stressor intensity (i.e. fluctuations) and synchronicity (i.e. timing of fluctuations) affect biological responses. We ask how variable stressor intensity and synchronicity, and interaction type, can influence how multiple stressors affect seagrass. At the highest intensities, fluctuating stressors applied asynchronously reduced seagrass biomass 36% more than for static stressors, yet no such difference occurred for photosynthetic capacity. Testing three separate hypotheses to predict underlying drivers of differences in biological responses highlighted alternative modes of action dependent on how stressors fluctuated over time. Given that environmental conditions are constantly changing, assessing static stressors may lead to inaccurate predictions of cumulative effects. Translating multiple stressor experiments to the real world, therefore, requires considering variability in stressor intensity and the synchronicity of fluctuations.
Identifiants
pubmed: 36217804
doi: 10.1111/ele.14120
pmc: PMC9828260
doi:
Types de publication
Letter
Langues
eng
Sous-ensembles de citation
IM
Pagination
2611-2623Informations de copyright
© 2022 The Authors. Ecology Letters published by John Wiley & Sons Ltd.
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