TY  - INPR
A1  - Nottebrock, Henning
A1  - Schmid, Baptiste
A1  - Mayer, Katharina
A1  - Devaux, Céline
A1  - Esler, Karen J.
A1  - Böhning-Gaese, Katrin
A1  - Schleuning, Matthias
A1  - Pagel, Jörn
A1  - Schurr, Frank
T1  - Floral resource-landscapes and pollinator-mediated interactions in plant communities
T2  - bioRxiv
N2  - Plant communities provide floral resource-landscapes for pollinators. Yet, it is insufficiently understood how these landscapes shape pollinator-mediated interactions among multiple plant species. Here, we study how pollinators and the seed set of plants respond to the distribution of a floral resource (nectar sugar) in space and across plant species, inflorescences and flowering phenologies. In a global biodiversity hotspot, we quantified floral resource-landscapes on 27 sites of 4 ha comprising 127,993 shrubs of 19 species. Visitation rates of key bird pollinators strongly depended on the phenology of site-scale resource amounts. Seed set of focal plants increased with resources of conspecific neighbours and with site-scale resources, notably with heterospecific resources of lower quality (less sugar per inflorescence). Floral resources are thus a common currency determining how multiple plant species interact via pollinators. These interactions may alter conditions for species coexistence in plant communities and cause community-level Allee effects that promote extinction cascades.
Y1  - 2015
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/72373
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-723738
IS  - 022533
ER  -