TY  - JOUR
A1  - Eccard, Jana
A1  - Mendes Ferreira, Clara
A1  - Peredo Arce, Andres
A1  - Dammhahn, Melanie
T1  - Top-down effects of foraging decisions on local, landscape and regional biodiversity of resources (DivGUD)
T2  - Ecology letters
N2  - 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 differences among foragers on the biodiversity of resource communities.
KW  - biodiversity
KW  - cascading effects
KW  - foraging behaviour
KW  - functional traits
KW  - giving-up density
KW  - landscape of fear
KW  - optimal foraging
KW  - patch use
Y1  - 2021
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/62333
SN  - 1461-0248
VL  - 25
IS  - 1
SP  - 3
EP  - 16
PB  - Wiley-Blackwell
CY  - Oxford [u.a.]
ER  -