2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/27/2021 | 2:00 PM - 3:30 PM | NOVEL BIOMARKERS REVEAL LANDSCAPE INFLUENCES ON LINKAGES BETWEEN AQUATIC AND TERRESTRIAL FOOD WEBS | Virtual Platform
NOVEL BIOMARKERS REVEAL LANDSCAPE INFLUENCES ON LINKAGES BETWEEN AQUATIC AND TERRESTRIAL FOOD WEBS
Stream and riparian habitats are strongly connected via the emergence of aquatic insects, which form an important prey subsidy for a wide range of terrestrial consumers. Human perturbations that impact these habitats can disrupt aquatic-terrestrial food-web linkages, but gaps in our knowledge remain about the relative strength of different drivers contributing to altered connectivity. We investigated how stream productivity gradients, aquatic invertebrate dispersal traits, and recipient terrestrial predators influence cross-ecosystem connectivity in temperate streams across four European catchments with varying levels of human disturbance. We used fatty acid biomarkers to measure putative aquatic linkages to riparian spiders. Trophic connectivity, as measured by the proportion of eicosapentaenoic acid (EPA), was positively associated with abundances of ‘aerial active’ dispersing aquatic insects, although this influence was shared with changes in environmental context and spider beta diversity. Structural equation modelling helped further demonstrate the linkage between aquatic insect communities and trophic connectivity with riparian spiders after accounting for biological and environmental contingencies. Our study demonstrates that using trait-based ecology in conjunction with novel biomarkers provides a more comprehensive means to describe cross-ecosystem connectivity and assess the impacts of environmental change on food webs.
- Meta-ecosystems
- Aquatic–terrestrial biodiversity
- Connectivity
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Presenters/Authors
Francis Burdon
(), Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden, francis.burdon@slu.se;
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Jasmina Sargac
(), Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden, jasmina.sargac@slu.se;
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Ellinor Ramberg
(), Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden, ellinor.karin.ramberg@slu.se;
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Cristina Popescu
(), Department of Systems Ecology and Sustainability, University of Bucharest, Romania , cristina.popescu@g.unibuc.ro;
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Darmina Nita
(), Department of Systems Ecology and Sustainability, University of Bucharest, Romania , nitadarmina@gmail.com;
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Corina Bradu
(), Department of Systems Ecology and Sustainability, University of Bucharest, Romania , corina.bradu@g.unibuc.ro;
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Marie Anne Eurie Forio
(), Aquatic Ecology Research Unit, Department of Animal Sciences and Aquatic Ecology, Ghent University, Belgium , Marie.Forio@UGent.be;
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Felix Witing
(), Department of Computational Landscape Ecology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany, felix.witing@ufz.de;
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Benjamin Kupilas
(), Norwegian Institute for Water Research (NIVA), Oslo, Norway , benjamin.kupilas@niva.no;
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Danny Lau
(), Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden , danny.lau@slu.se;
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Geta Risnoveanu
(), Department of Systems Ecology and Sustainability, University of Bucharest, Romania , geta.risnoveanu@g.unibuc.ro;
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Peter Goethals
(), Aquatic Ecology Research Unit, Department of Animal Sciences and Aquatic Ecology, Ghent University, Belgium , Peter.Goethals@UGent.be;
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Nikolai Friberg
(), Norwegian Institute for Water ResearchNorwegian Institute for Water Research (NIVA), Oslo, Norway , Nikolai.Friberg@niva.no;
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Richard Johnson
(), Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden, richard.johnson@slu.se;
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Brendan McKie
(), Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, brendan.mckie@slu.se;
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