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Island woodiness underpins accelerated disparification in plant radiations

Title data

Nürk, Nicolai M. ; Atchison, Guy ; Hughes, Colin:
Island woodiness underpins accelerated disparification in plant radiations.
In: New Phytologist. (18 March 2019) .
ISSN 1469-8137
DOI: https://doi.org/10.1111/nph.15797

Abstract in another language

The evolution of secondary (insular) woodiness and the rapid disparification of plant growth forms associated with island radiations show intriguing parallels between oceanic islands and tropical alpine sky islands. However, the evolutionary significance of these phenomena remains poorly understood and the focus of debate. We explore the evolutionary dynamics of species diversification and trait disparification across evolutionary radiations in contrasting island systems compared to their non‐island relatives. We estimate rates of species diversification, growth form evolution, and phenotypic space saturation for the classical oceanic island plant radiations – the Hawaiian silverswords and Macaronesian Echium ‐ and the well‐studied sky island radiations of Lupinus and Hypericum in the Andes. We show that secondary woodiness is associated with dispersal to islands and with accelerated rates of species diversification, accelerated disparification of plant growth forms, and occupancy of greater phenotypic trait space for island clades than their non‐island relatives, on both oceanic and sky islands. We conclude that secondary woodiness is a prerequisite that may act as a key innovation, manifest as the potential to occupy greater trait space, for plant radiations on island systems in general, further emphasizing the importance of combinations of clade‐specific traits and ecological opportunities in driving adaptive radiations.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER150415
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Systematics
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Systematics > Chair Plant Systematics - Univ.-Prof. Dr. Sigrid Liede-Schumann
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 25 Mar 2019 08:40
Last Modified: 18 Sep 2019 09:53
URI: https://eref.uni-bayreuth.de/id/eprint/48061