A Bayesian network approach to trophic metacommunities shows that habitat loss accelerates top species extinctions

Haeussler, JohannaGerman Ctr Integrat Biodivers Res iDiv, Germany; Friedrich Schiller Univ Jena, Germany (författare)

Funding Agencies|German Research Foundation (DFG)German Research Foundation (DFG) [FOR 1748, RA 2339/2-2]; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig - German Research Foundation [FZT 118]; Swedish Research CouncilSwedish Research Council [VR 2017-05245, VR 2016-04919]
We develop a novel approach to analyse trophic metacommunities, which allows us to explore how progressive habitat loss affects food webs. Our method combines classic metapopulation models on fragmented landscapes with a Bayesian network representation of trophic interactions for calculating local extinction rates. This means that we can repurpose known results from classic metapopulation theory for trophic metacommunities, such as ranking the habitat patches of the landscape with respect to their importance to the persistence of the metacommunity as a whole. We use this to study the effects of habitat loss, both on model communities and the plant-mammal Serengeti food web dataset as a case study. Combining straightforward parameterisability with computational efficiency, our method permits the analysis of species-rich food webs over large landscapes, with hundreds or even thousands of species and habitat patches, while still retaining much of the flexibility of explicit dynamical models.

Barabas, GyörgyLinköpings universitet,Teoretisk Biologi,Tekniska fakulteten,MTA ELTE Theoret Biol & Evolutionary Ecol Res Grp, Hungary(Swepub:liu)gyoba85 (författare)
Eklöf, AnnaLinköpings universitet,Teoretisk Biologi,Tekniska fakulteten(Swepub:liu)annek49 (författare)
German Ctr Integrat Biodivers Res iDiv, Germany; Friedrich Schiller Univ Jena, GermanyTeoretisk Biologi (creator_code:org_t)

Av författaren/redakt...: Haeussler, Johan ...; Barabas, György; Eklöf, Anna

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