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What explains high plant richness in East Asia? Time anddiversification in the tribe Lysimachieae (Primulaceae)
Swedish Museum of Natural History, Department of Botany.ORCID iD: 0000-0003-1822-5235
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2018 (English)In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137Article in journal (Refereed) 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

Place, publisher, year, edition, pages
2018.
Keyword [en]
biogeography, diversification rate, Lysimachieae, phylogeny, species richness
National Category
Biological Systematics
Research subject
Ecosystems and species history
Identifiers
URN: urn:nbn:se:nrm:diva-2792DOI: 10.1111/nph.15144OAI: oai:DiVA.org:nrm-2792DiVA, id: diva2:1198784
Available from: 2018-04-18 Created: 2018-04-18 Last updated: 2018-04-18

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Anderberg, Arne Alfred
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