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Drivers of regional and local diversity of Amazonian stream Odonata
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik. Departament of Biogeography and Global Change, Museo Nacional de Ciencias Naturales (MNCN-CSIC), Madrid, Spain.
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2019 (engelsk)Inngår i: Insect Conservation and Diversity, ISSN 1752-458X, E-ISSN 1752-4598, Vol. 12, nr 3, s. 251-261Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Large Amazonian rivers may act as dispersal barriers for animals with low dispersal abilities, limiting their distribution to certain interfluves. Consequently, the distribution of these taxa would be less affected by macroclimatic gradients. Conversely, high-dispersal taxa would be less constrained by large rivers and may track suitable climates. We evaluate whether Zygoptera and Anisoptera, two Odonata suborders with different dispersal abilities, show differences in distribution patterns across Amazonian interfluves. We further assess the relative importance of macroclimatic and habitat factors in their community assembly. We used network modularity analyses to identify biogeographic species pools and spatial buffers to define metacommunity species pools. Then, we used structural equationmodels to estimate the relative importance of multi-scale factors on species richness patterns. Zygoptera communities are more similar in species composition within than between interfluves, suggesting that large Amazonian rivers indeed limit the distribution of Zygoptera species. Conversely, the distribution of Anisoptera extends across Amazonian interfluves. Seasonality has a strong positive effect on Zygoptera and Anisoptera richness across scales. In addition, habitat integrity is negatively correlated with the regional species richness and abundance of Anisoptera and positively correlated with Zygoptera local richness. The contrasting effects of habitat integrity on Anisoptera and Zygoptera suggest that the former is favored in open habitats, whereas the latter is so in forests. Despite these differences, both suborders appear to follow similar community assembly mechanisms in Amazonia, with a strong climatic control across scales and an effect of habitat filters on local communities.

sted, utgiver, år, opplag, sider
Wiley-Blackwell, 2019. Vol. 12, nr 3, s. 251-261
Emneord [en]
Amazonia, biogeography, chorotypes, network modularity analysis, Odonata, seasonality, species pool, structural equationmodels
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Identifikatorer
URN: urn:nbn:se:umu:diva-161471DOI: 10.1111/icad.12327ISI: 000471318500008Scopus ID: 2-s2.0-85054492806OAI: oai:DiVA.org:umu-161471DiVA, id: diva2:1336296
Tilgjengelig fra: 2019-07-09 Laget: 2019-07-09 Sist oppdatert: 2023-03-24bibliografisk kontrollert

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Calatayud, Joaquín

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