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Dispersal strength determines meta-community structure in a dendritic riverine network

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dc.contributor Universitat de Vic. Centre Tecnològic BETA
dc.contributor.author Cañedo-Argüelles, Miguel
dc.contributor.author Boersma, Kate S.
dc.contributor.author Bogan, Michael T.
dc.contributor.author Olden, Julian D.
dc.contributor.author Phillipsen, Ivan
dc.contributor.author Schriever, Tiffany A.
dc.contributor.author Lytle, David A.
dc.date.accessioned 2015-04-15T10:37:16Z
dc.date.available 2015-04-15T10:37:16Z
dc.date.created 2015
dc.date.issued 2015
dc.identifier.citation Canedo-Argueelles, M., Boersma, K. S., Bogan, M. T., Olden, J. D., Phillipsen, I., Schriever, T. A., et al. (2015). Dispersal strength determines meta-community structure in a dendritic riverine network. Journal of Biogeography, 42(4), 778-790. ca_ES
dc.identifier.issn 1365-2699
dc.identifier.uri http://hdl.handle.net/10854/3988
dc.description.abstract Aim Meta-community structure is a function of both local (site-specific) and regional (landscape-level) ecological factors, and the relative importance of each may be mediated by the dispersal ability of organisms. Here, we used aquatic invertebrate communities to investigate the relationship between local and regional factors in explaining distance decay relationships (DDRs) in fragmented dendritic stream networks. Location Dryland streams distributed within a 400-km2 section of the San Pedro River basin, south-eastern Arizona, USA. Methods We combined fine-scale local information (flow and habitat characteristics) with regional-scale information to explain DDR patterns in community composition of aquatic invertebrate species with a wide range of dispersal abilities. We used a novel application of a landscape resistance modelling approach (originally developed for landscape genetic studies) that simultaneously assessed the importance of local and regional ecological factors as well as dispersal ability of organisms. Results We found evidence that both local and regional factors influenced aquatic invertebrate DDRs in dryland stream networks, and the importance of each factor depended on the dispersal capacities of the organisms. Local and weak dispersers were more affected by site-specific factors, intermediate dispersers by landscape-level factors, and strong dispersers showed no discernable pattern. This resulted in a strongly hump-shaped relationship between dispersal ability and landscape-level factors, where only moderate dispersers showed evidence of DDRs. Unlike most other studies of dendritic networks, our results suggest that overland pathways, using perennial refugia as stepping-stones, might be the main dispersal route in fragmented stream networks. Main conclusions We suggest that using a combination of landscape and local distance measures can help to unravel meta-community patterns in dendritic systems. Our findings have important conservation implications, such as the need to manage river systems for organisms that span a wide variety of dispersal abilities and local ecological requirements. Our results also highlight the need to preserve perennial refugia in fragmented networks, as they may ensure the viability of aquatic meta-communities by facilitating dispersal. ca_ES
dc.format application/pdf
dc.format.extent 13 p. ca_ES
dc.language.iso eng ca_ES
dc.publisher John Wiley & Sons ca_ES
dc.rights Tots els drets reservats ca_ES
dc.rights (c) Wiley [The definitive version is available at www3.interscience.wiley.com]
dc.subject.other Invertebrats aquàtics ca_ES
dc.subject.other Invertebrats aquàtics -- Efecte de la sequera ca_ES
dc.title Dispersal strength determines meta-community structure in a dendritic riverine network ca_ES
dc.type info:eu-repo/semantics/article ca_ES
dc.identifier.doi https://doi.org/10.1111/jbi.12457
dc.rights.accessRights info:eu-repo/semantics/closedAccess ca_ES
dc.type.version info:eu-repo/publishedVersion ca_ES
dc.indexacio Indexat a WOS/JCR ca_ES

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