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What explains high plant richness in East Asia? Time anddiversification in the tribe Lysimachieae (Primulaceae)
Naturhistoriska riksmuseet, Enheten för botanik.ORCID-id: 0000-0003-1822-5235
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2018 (Engelska)Ingår i: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 219, s. 436-448Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

What causes the disparity in biodiversity among regions is a fundamental question in bio-geography, ecology, and evolutionary biology. Evolutionary and biogeographic processes(speciation, extinction, dispersal) directly determine species richness patterns, and can bestudied using integrative phylogenetic approaches. However, the strikingly high richness ofEast Asia relative to other Northern Hemisphere regions remains poorly understood from thisperspective. Here, for the first time, we test two general hypotheses (older colonization time,faster diversification rate) to explain this pattern, using the plant tribe Lysimachieae (Primu-laceae) as a model system.We generated a new time-calibrated phylogeny for Lysimachieae (13 genes, 126 species),to estimate colonization times and diversification rates for each region and to test the relativeimportance of these two factors for explaining regional richness patterns.We find that neither time nor diversification rates alone explain richness patterns amongregions in Lysimachieae. Instead, a new index that combines both factors explains global rich-ness patterns in the group and their high East Asian biodiversity.Based on our results from Lysimachieae, we suggest that the high richness of plants in EastAsia may be explained by a combination of older colonization times and faster diversificationrates in this region

Ort, förlag, år, upplaga, sidor
2018. Vol. 219, s. 436-448
Nyckelord [en]
biogeography, diversification rate, Lysimachieae, phylogeny, species richness
Nationell ämneskategori
Biologisk systematik
Forskningsämne
Ekosystem och arthistoria
Identifikatorer
URN: urn:nbn:se:nrm:diva-2792DOI: 10.1111/nph.15144OAI: oai:DiVA.org:nrm-2792DiVA, id: diva2:1198784
Tillgänglig från: 2018-04-18 Skapad: 2018-04-18 Senast uppdaterad: 2018-06-26Bibliografiskt granskad

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Anderberg, Arne Alfred
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Enheten för botanik
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New Phytologist
Biologisk systematik

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