Top-down effects of foraging decisions on local, landscape and regional biodiversity of resources (DivGUD)
- Foraging by consumers acts as a biotic filtering mechanism for biodiversity at the trophic level of resources. Variation in foraging behaviour has cascading effects on abundance, diversity, and functional trait composition of the community of resource species. Here we propose diversity at giving-up density (DivGUD), i.e. when foragers quit exploiting a patch, as a novel concept and simple measure quantifying cascading effects at multiple spatial scales. In experimental landscapes with an assemblage of plant seeds, patch residency of wild rodents decreased local alpha-DivGUD (via elevated mortality of species with large seeds) and regional gamma-DivGUD, while dissimilarity among patches in a landscape (beta-DivGUD) increased. By linking theories of adaptive foraging behaviour with community ecology, DivGUD allows to investigate cascading indirect predation effects, e.g. the ecology-of-fear framework, feedbacks between functional trait composition of resource species and consumer communities, and effects of inter-individual differencesForaging by consumers acts as a biotic filtering mechanism for biodiversity at the trophic level of resources. Variation in foraging behaviour has cascading effects on abundance, diversity, and functional trait composition of the community of resource species. Here we propose diversity at giving-up density (DivGUD), i.e. when foragers quit exploiting a patch, as a novel concept and simple measure quantifying cascading effects at multiple spatial scales. In experimental landscapes with an assemblage of plant seeds, patch residency of wild rodents decreased local alpha-DivGUD (via elevated mortality of species with large seeds) and regional gamma-DivGUD, while dissimilarity among patches in a landscape (beta-DivGUD) increased. By linking theories of adaptive foraging behaviour with community ecology, DivGUD allows to investigate cascading indirect predation effects, e.g. the ecology-of-fear framework, feedbacks between functional trait composition of resource species and consumer communities, and effects of inter-individual differences among foragers on the biodiversity of resource communities.…
Author details: | Jana EccardORCiDGND, Clara Mendes FerreiraORCiDGND, Andres Peredo Arce, Melanie DammhahnORCiDGND |
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DOI: | https://doi.org/10.1111/ele.13901 |
ISSN: | 1461-0248 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/34713543 |
Title of parent work (English): | Ecology letters |
Publisher: | Wiley-Blackwell |
Place of publishing: | Oxford [u.a.] |
Publication type: | Article |
Language: | English |
Date of first publication: | 2022/10/28 |
Publication year: | 2022 |
Release date: | 2024/01/29 |
Tag: | biodiversity; cascading effects; foraging behaviour; functional traits; giving-up density; landscape of fear; optimal foraging; patch use |
Volume: | 25 |
Issue: | 1 |
Number of pages: | 14 |
First page: | 3 |
Last Page: | 16 |
Funding institution: | German Research FoundationGerman Research Foundation (DFG) |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Biochemie und Biologie |
DDC classification: | 5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie |
Peer review: | Referiert |
Publishing method: | Open Access / Hybrid Open-Access |
License (German): | CC-BY-NC-ND - Namensnennung, nicht kommerziell, keine Bearbeitungen 4.0 International |