Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive 

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-57462

Warren, B H; Bakker, F T; Bellstedt, D U; Bytebier, B; Classen-Bockhoff, R; Dreyer, L L; Edwards, D; Forest, F; Galley, C; Hardy, C R; Linder, H P; Muasya, A M; Mummenhoff, K; Oberlander, K C; Quint, M; Richardson, J E; Savolainen, V; Schrire, B D; Van der Niet, T; Verboom, G A; Yesson, C; Hawkins, J A (2011). Consistent phenological shifts in the making of a biodiversity hotspot: the Cape flora. BMC Evolutionary Biology, 11:39.

[img]
Preview
Published Version
PDF
476kB

Abstract

BACKGROUND:

The best documented survival responses of organisms to past climate change on short (glacial-interglacial) timescales are distributional shifts. Despite ample evidence on such timescales for local adaptations of populations at specific sites, the long-term impacts of such changes on evolutionary significant units in response to past climatic change have been little documented. Here we use phylogenies to reconstruct changes in distribution and flowering ecology of the Cape flora--South Africa's biodiversity hotspot--through a period of past (Neogene and Quaternary) changes in the seasonality of rainfall over a timescale of several million years.
RESULTS:

Forty-three distributional and phenological shifts consistent with past climatic change occur across the flora, and a comparable number of clades underwent adaptive changes in their flowering phenology (9 clades; half of the clades investigated) as underwent distributional shifts (12 clades; two thirds of the clades investigated). Of extant Cape angiosperm species, 14-41% have been contributed by lineages that show distributional shifts consistent with past climate change, yet a similar proportion (14-55%) arose from lineages that shifted flowering phenology.
CONCLUSIONS:

Adaptive changes in ecology at the scale we uncover in the Cape and consistent with past climatic change have not been documented for other floras. Shifts in climate tolerance appear to have been more important in this flora than is currently appreciated, and lineages that underwent such shifts went on to contribute a high proportion of the flora's extant species diversity. That shifts in phenology, on an evolutionary timescale and on such a scale, have not yet been detected for other floras is likely a result of the method used; shifts in flowering phenology cannot be detected in the fossil record.

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Systematic Botany and Botanical Gardens
DDC:580 Plants (Botany)
Language:English
Date:2011
Deposited On:29 Jan 2012 10:20
Last Modified:29 Nov 2013 15:15
Publisher:BioMed Central
ISSN:1471-2148
Publisher DOI:10.1186/1471-2148-11-39
Official URL:http://www.biomedcentral.com/1471-2148/11/39
PubMed ID:21303519
Citations:Web of Science®. Times Cited: 4
Google Scholar™
Scopus®. Citation Count: 4

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page