Global patterns and drivers of phylogenetic structure in island floras

2015 | journal article. A publication with affiliation to the University of Göttingen.

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​Global patterns and drivers of phylogenetic structure in island floras​
Weigelt, P. ; Kissling, W. D.; Kisel, Y.; Fritz, S. A.; Karger, D. N.; Kessler, M. & Lehtonen, S. et al.​ (2015) 
Scientific Reports5(1) art. 12213​.​ DOI: https://doi.org/10.1038/srep12213 

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Authors
Weigelt, Patrick ; Kissling, W. Daniel; Kisel, Yael; Fritz, Susanne A.; Karger, Dirk Nikolaus; Kessler, Michael; Lehtonen, Samuli; Svenning, Jens-Christian; Kreft, Holger 
Abstract
Islands are ideal for investigating processes that shape species assemblages because they are isolated and have discrete boundaries. Quantifying phylogenetic assemblage structure allows inferences about these processes, in particular dispersal, environmental filtering and in-situ speciation. Here, we link phylogenetic assemblage structure to island characteristics across 393 islands worldwide and 37,041 vascular plant species (representing angiosperms overall, palms and ferns). Physical and bioclimatic factors, especially those impeding colonization and promoting speciation, explained more variation in phylogenetic structure of angiosperms overall (49%) and palms (52%) than of ferns (18%). The relationships showed different or contrasting trends among these major plant groups, consistent with their dispersal- and speciation-related traits and climatic adaptations. Phylogenetic diversity was negatively related to isolation for palms, but unexpectedly it was positively related to isolation for angiosperms overall. This indicates strong dispersal filtering for the predominantly large-seeded, animal-dispersed palm family whereas colonization from biogeographically distinct source pools on remote islands likely drives the phylogenetic structure of angiosperm floras. We show that signatures of dispersal limitation, environmental filtering and in-situ speciation differ markedly among taxonomic groups on islands, which sheds light on the origin of insular plant diversity.
Issue Date
2015
Journal
Scientific Reports 
Organization
Fakultät für Forstwissenschaften und Waldökologie ; Burckhardt-Institut ; Abteilung Biodiversität, Makroökologie und Biogeographie 
ISSN
2045-2322
Language
English
Sponsor
Open-Access Publikationsfonds 2015

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