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How bird clades diversify in response to climatic and geographic factors
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap. Univ Texas Austin, Sect Integrat Biol, 205 W 24th St, Austin, TX 78712 USA.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap.
2017 (engelsk)Inngår i: Ecology Letters, ISSN 1461-023X, E-ISSN 1461-0248, Vol. 20, nr 9, s. 1129-1139Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

While the environmental correlates of global patterns in standing species richness are well understood, it is poorly known which environmental factors promote diversification (speciation minus extinction) in clades. We tested several hypotheses for how geographic and climatic variables should affect diversification using a large dataset of bird sister genera endemic to the New World. We found support for the area, evolutionary speed, environmental predictability and climatic stability hypotheses, but productivity and topographic complexity were rejected as explanations. Genera that had accumulated more species tend to occupy wider niche space, manifested both as occurrence over wider areas and in more habitats. Genera with geographic ranges that have remained more stable in response to glacial-interglacial changes in climate were also more species rich. Since many relevant explanatory variables vary latitudinally, it is crucial to control for latitude when testing alternative mechanistic explanations for geographic variation in diversification among clades.

sted, utgiver, år, opplag, sider
WILEY , 2017. Vol. 20, nr 9, s. 1129-1139
Emneord [en]
Climate stability, ecological niche modelling, energy availability, geographic area, habitat diversity, phylogenetic independent contrasts, sister group comparisons, species richness, temperate, tropical
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Identifikatorer
URN: urn:nbn:se:umu:diva-138578DOI: 10.1111/ele.12809ISI: 000407391900004OAI: oai:DiVA.org:umu-138578DiVA, id: diva2:1145619
Tilgjengelig fra: 2017-09-29 Laget: 2017-09-29 Sist oppdatert: 2018-06-09bibliografisk kontrollert

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