Imperial College London
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ProfessorVincentSavolainen

Faculty of Natural Sciences, Department of Life Sciences (Silwood Park)

Professor of Organismic Biology
 
 
 
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Contact

 

v.savolainen CV

 
 
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Assistant

 

Ms Elisabeth Ahlstrom +44 (0)20 7594 2207

 
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Location

 

N.1-17MunroSilwood Park

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Summary

 

Publications

Citation

BibTex format

@article{Hipperson:2016:10.1111/jeb.12933,
author = {Hipperson, H and Dunning, LT and Baker, WJ and Butlin, RK and Hutton, I and Papadopulos, AST and Smadja, CM and Wilson, TC and Devaux, C and Savolainen, V},
doi = {10.1111/jeb.12933},
journal = {Journal of Evolutionary Biology},
pages = {2143--2156},
title = {Ecological speciation in sympatric palms: 2. Pre- and post-zygotic isolation},
url = {http://dx.doi.org/10.1111/jeb.12933},
volume = {29},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We evaluated reproductive isolation in two species of palms (Howea) that have evolved sympatrically on Lord Howe Island (LHI, Australia). We estimated the strength of some pre- and post-zygotic mechanisms in maintaining current species boundaries. We found that flowering time displacement between species is consistent across in and ex situ common gardens and is thus partly genetically determined. On LHI, pre-zygotic isolation due solely to flowering displacement was 97% for H. belmoreana and 80% for H. forsteriana; this asymmetry results from H. forsteriana flowering earlier than H. belmoreana and being protandrous. As expected, only a few hybrids (here confirmed by genotyping) at both juvenile and adult stages could be detected in two sites on LHI, in which the two species grow intermingled (The Far Flats) or adjacently (Transit Hill). Yet, the distribution of hybrids was different between sites. At Transit Hill we found no hybrid adult trees, but 13.5% of younger palms examined there were of late hybrid classes. In contrast we found four hybrid adult trees, mostly of late hybrid classes, and only one juvenile F1 hybrid in the Far Flats. This pattern indicates that selection acts against hybrids between the juvenile and adult stages. An in situ reciprocal seed transplant between volcanic and calcareous soils also shows that early fitness components (up to 36 months) were affected by species and soil. These results are indicative of divergent selection in reproductive isolation, although it does not solely explain the current distribution of the two species on LHI.
AU  - Hipperson,H
AU  - Dunning,LT
AU  - Baker,WJ
AU  - Butlin,RK
AU  - Hutton,I
AU  - Papadopulos,AST
AU  - Smadja,CM
AU  - Wilson,TC
AU  - Devaux,C
AU  - Savolainen,V
DO  - 10.1111/jeb.12933
EP  - 2156
PY  - 2016///
SN  - 1010-061X
SP  - 2143
TI  - Ecological speciation in sympatric palms: 2. Pre- and post-zygotic isolation
T2  - Journal of Evolutionary Biology
UR  - http://dx.doi.org/10.1111/jeb.12933
UR  - http://hdl.handle.net/10044/1/34351
VL  - 29
ER  -
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