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Dispersion fields reveal the compositional structure of South American vertebrate assemblages

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dc.contributor.author Borregaard, Michael K. en
dc.contributor.author Graves, Gary R. en
dc.contributor.author Rahbek, Carsten en
dc.date.accessioned 2020-07-17T02:02:44Z
dc.date.available 2020-07-17T02:02:44Z
dc.date.issued 2020
dc.identifier.citation Borregaard, Michael K., Graves, Gary R., and Rahbek, Carsten. 2020. "Dispersion fields reveal the compositional structure of South American vertebrate assemblages." <em>Nature Communications</em>. 11 (1):491&ndash;491. <a href="https://doi.org/10.1038/s41467-019-14267-y">https://doi.org/10.1038/s41467-019-14267-y</a> en
dc.identifier.issn 2041-1723
dc.identifier.uri https://hdl.handle.net/10088/106505
dc.description.abstract The causes of continental patterns in species richness continue to spur heated discussion. Hypotheses based on ambient energy have dominated the debate, but are increasingly being challenged by hypotheses that model richness as the overlap of species ranges, ultimately controlled by continental range dynamics of individual species. At the heart of this controversy lies the question of whether species richness of individual grid cells is controlled by local factors, or reflects larger-scale spatial patterns in the turnover of species&#39; ranges. Here, we develop a new approach based on assemblage dispersion fields, formed by overlaying the geographic ranges of all species co-occurring in a grid cell. We created dispersion fields for all tetrapods of South America, and characterized the orientation and shape of dispersion fields as a vector field. The resulting maps demonstrate the existence of macro-structures in the turnover of biotic similarity at continental scale that are congruent among vertebrate classes. These structures underline the importance of continental-scale processes for species richness in individual assemblages. Ecologists continue to debate whether local species assemblages result from habitat filtering or from turnover among the regional species pool. Here the authors develop a &quot;dispersion field&quot; method to mapping species range overlaps, showing that regional turnover processes are key to local assembly. en
dc.relation.ispartof Nature Communications en
dc.title Dispersion fields reveal the compositional structure of South American vertebrate assemblages en
dc.type Journal Article en
dc.identifier.srbnumber 156275
dc.identifier.doi 10.1038/s41467-019-14267-y
rft.jtitle Nature Communications
rft.volume 11
rft.issue 1
rft.spage 491
rft.epage 491
dc.description.SIUnit NMNH en
dc.description.SIUnit NH-Vertebrate Zoology en
dc.citation.spage 491
dc.citation.epage 491

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