Hot spots of mutualistic networks.
Incorporating interactions into a biogeographical framework may serve to understand how interactions and the services they provide are distributed in space. We begin by simulating the spatiotemporal dynamics of realistic mutualistic networks inhabiting spatial networks of habitat patches. We proceed by comparing the predicted patterns with the empirical results of a set of pollination networks in isolated hills of the Argentinian Pampas. We first find that one needs to sample up to five times as much area to record interactions as would be needed to sample the same proportion of species. Secondly, we find that peripheral patches have fewer interactions and harbour less nested networks - therefore potentially less resilient communities - compared to central patches. Our results highlight the important role played by the structure of dispersal routes on the spatial distribution of community patterns. This may help to understand the formation of biodiversity hot spots.
Integrative Ecology Group, Estación Biológica de Doñana, CSIC, Calle Américo Vespucio s/n, 41092, Sevilla, Spain.
Luis J
LJ
Gilarranz
Laboratorio Ecotono-CRUB, Universidad Nacional del Comahue and INIBIOMA, Pasaje Gutierrez 1125, 8400, San Carlos de Bariloche, Río Negro, Argentina.|EEA [Estación Experimental Agropecuaria] Balcarce, INTA [Instituto Nacional de Tecnología Agropecuaria], CC 276, 7620, Balcarce, Buenos Aires, Argentina.
Malena
M
Sabatino
Laboratorio Ecotono-CRUB, Universidad Nacional del Comahue and INIBIOMA, Pasaje Gutierrez 1125, 8400, San Carlos de Bariloche, Río Negro, Argentina.
Marcelo A
MA
Aizen
Integrative Ecology Group, Estación Biológica de Doñana, CSIC, Calle Américo Vespucio s/n, 41092, Sevilla, Spain.
Jordi
J
Bascompte
D000818:Animals; D001118:Argentina; D044822:Biodiversity; D003198:Computer Simulation; D017753:Ecosystem; D007313:Insecta / Q000502:physiology*; D010944:Plants / Q000145:classification*; D054817:Pollination / Q000502:physiology*; D011157:Population Dynamics; D062211:Spatio-Temporal Analysis; D013559:Symbiosis
island biogeography; metacommunities; nestedness; pollination; seed dispersal; spatial networks; species–area relationship