2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/25/2021 | 2:00 PM - 3:30 PM | SPACE AS DRIVER OF SYNERGISM OF LAND-USE AND CLIMATIC EFFECTS IN FRESHWATER INSECT META-POPULATIONS | Virtual Platform
SPACE AS DRIVER OF SYNERGISM OF LAND-USE AND CLIMATIC EFFECTS IN FRESHWATER INSECT META-POPULATIONS
In most ecosystems, multiple stressors co-occur in space and time. Stressor interactions can be additive or non-additive (antagonistic or synergistic). To date, most multiple stressor studies focused on effects at the local scale (i.e., patch experiments). However, it remains largely unknown how spatio-temporally differing stressors interact in their effects. Indeed, at larger spatial scales, biotic dynamics within ecological networks complicate our understanding.
We simulated a wide range of scenarios of two stressors using a spatially-explicit meta-population model for a generic, hemimetabolous freshwater insect (Streib et al. 2020 - Ecol. Model. 416). Stressors were land-use and climatic extreme events, implemented in spatio-temporally different profiles with repeated co-occurrence. Land-use permanently influenced meta-population network connectivity and patch qualities, whereas climatic extreme events resulted in periodic mortality. Overall, we ran 27.000 simulations.
We found that the type of interaction between land-use and climatic extreme events depends on the stressor intensity, with higher levels of both stressors resulting in synergistic effects. Conversely, low land-use stress buffered long-term effects of climatic extreme events at all levels, by supporting recovery dynamics via the network. We discuss the relevance of the spatial dimension when assessing the effects of multiple stressors.
- Stressor
- Global change
- Meta-ecosystems
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Presenters/Authors
Lucas Streib
(), University of Koblenz-Landau, Institute for Environmental Sciences, streib@uni-landau.de;
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Noel Juvigny-Khenafou
(), University of Koblenz-Landau, Institute for Environmental Sciences, juvigny-khenafou@uni-landau.de;
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Ralf Schäfer
(), University of Koblenz-Landau, Institute for Environmental Sciences, schaefer-ralf@uni-landau.de;
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