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Title: Dispersal mode and spatial extent influence distance-decay patterns in pond metacommunities
Authors: Tornero, Irene
Boix, Dani
Bagella, Simonetta
Pinto-Cruz, Carla
Caria, Maria Carmela
Belo, A.D.F.
Lumbreras, Ana
Sala, Jordi
Compte, Jordi
Gascón, Stéphanie
Issue Date: Aug-2018
Citation: Tornero I, Boix D, Bagella S, Pinto-Cruz C, Caria MC, Belo A, Lumbreras A, Sala J, Compte J, Gascón S., 2018. Dispersal mode and spatial extent influence distance-decay patterns in pond metacommunities. PLoS One 28, 13. DOI: 10.1371/journal.pone.0203119
Abstract: Assuming that dispersal modes or abilities can explain the different responses of organisms to geographic or environmental distances, the distance-decay relationship is a useful tool to evaluate the relative role of local environmental structuring versus regional control in com- munity composition. Based on continuing the current theoretical framework on metacommu- nity dynamics and based on the predictive effect of distance on community similarity, we proposed a new framework that includes the effect of spatial extent. In addition, we tested the validity of our proposal by studying the community similarity among three biotic groups with different dispersal modes (macrofaunal active and passive dispersers and plants) from two pond networks, where one network had a small spatial extent, and the other network had an extent that was 4 times larger. Both pond networks have similar environmental vari- ability. Overall, we found that environmental distance had larger effects than geographical distances in both pond networks. Moreover, our results suggested that species sorting is the main type of metacommunity dynamics shaping all biotic groups when the spatial extent is larger. In contrast, when the spatial extent is smaller, the observed distance-decay patterns suggested that different biotic groups were mainly governed by different metacommunity dynamics. While the distance-decay patterns of active dispersers better fit the trend that was expected when mass effects govern a metacommunity, passive dispersers showed a pattern that was expected when species sorting prevails. Finally, in the case of plants, it is difficult to associate their distance-decay patterns with one type of metacommunity dynamics.
Type: article
Appears in Collections:MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
BIO - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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