Home
  Search
  JSE at Wiley-Blackwell

 Journal

Accepted Articles

Early View

Current Issue

Archive

 
  Manuscript Submission

Online Submission

Instructions for Authors

Copyright Transfer Agreement


 About JSE

Aims & Scope

Editorial Board

Online Office

Sponsors & Publisher


 Partner Journals

Other Journals from IB-CAS

TAXON

Plant Diversity and Resources

Journal of Systematics and Evolution

Volume 56 Issue 4, Pages 340359.

Published Online: 28 May 2018

DOI: 10.1111/jse.12417

References
Full Text HTML
Full Text PDF
Print this page
Dispersal is associated with morphological innovation, but not increased diversification, in Cyphostemma (Vitaceae)

David J. Hearn1,2*, Margaret Evans3, Ben Wolf1, Michael McGinty1, and Jun Wen4

1Department of Biological Sciences, Towson University, 8000 York Rd, Baltimore, MD 21252, USA

2JCVI, Inc., Rockville, MD 20850, USA

3Department of Ecology & Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA

4Department of Botany, MRC 166, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013, USA

Keywords: adaptive radiation, biogeography, Cyphostemma, dispersal, divergence time estimation, diversification, growth habit, key innovation, succulence.

Abstract:

Multiple processes − including dispersal, morphological innovation, and habitat change − are frequently cited as catalysts for increased diversification. We investigate these processes and the causal linkages among them in the genus Cyphostemma (Vitaceae), a clade comprising ∼200 species that is unique in the Vitaceae for its diversity of growth habits. We reconstruct time\calibrated evolutionary relationships among 64 species in the genus using five nuclear and chloroplast markers and infer the group's morphological and biogeographic history. We test for changes in speciation rate and evaluate the temporal association and sequencing of events with respect to dispersal, habitat change, and morphological evolution using a Monte Carlo simulation approach. In Cyphostemma, neither dispersal nor morphological evolution is associated with shifts in speciation rate, but dispersal is associated with evolutionary shifts in growth form. Evolution of stem succulence, in particular, is associated with adaptation to local, pre\existing conditions following long\distance dispersal, not habitat change in situ. We suggest that the pattern of association between dispersal, morphological innovation, and diversification may depend on the particular characters under study. Lineages with evolutionarily labile characters, such as stem succulence, do not necessarily conform to the notion of niche conservatism and instead demonstrate remarkable morphological adaptation to local climate and edaphic conditions following dispersal.

 

Copyright © 2017. The Editorial Office, Journal of Systematics and Evolution, Institute of Botany, CAS
No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Tel.: +86 10 62836132; 62836572    Fax:+86 10 62836132
E-mail: jse@ibcas.ac.cn
利嫋姥宛催詐ICP姥16067583催-32