@ARTICLE{TreeBASE2Ref22758,
author = {Joanne Bentley and G Anthony Verboom and Nicola G Bergh},
title = {Erosive processes after tectonic uplift stimulate vicariant and adaptive speciation : evolution in an Afrotemperate-endemic paper daisy genus},
year = {2014},
keywords = {Afrotemperate, Drakensberg, uplift, adaptive speciation, vicariance, Gnaphalieae},
doi = {},
url = {http://},
pmid = {},
journal = {BMC Evolutionary Biology},
volume = {},
number = {},
pages = {},
abstract = {Background
The role of tectonic uplift in stimulating speciation in South Africa?s only alpine zone, the Drakensberg, has not been explicitly examined. Tectonic processes may influence speciation both through the creation of novel habitats and by physically isolating plant populations. We use the Afrotemperate endemic daisy genus Macowania to explore the timing and mode (geographic versus adaptive) of speciation in this region. Between sister species pairs we expect high morphological divergence where speciation has happened in sympatry (adaptive) while with geographic (vicariant) speciation we may expect to find less morphological divergence and a greater degree of allopatry. A dated molecular phylogenetic hypothesis for Macowania elucidates species' relationships and is used to address the potential impact of uplift on diversification. Morphological divergence of a small sample of reproductive and vegetative characters, used as a proxy for adaptive divergence, is measured against species' range distributions to estimate mode of speciation across two subclades in the genus.
Results
The Macowania crown age is consistent with the hypothesis of post-uplift diversification, and we find evidence for both vicariant and adaptive speciation between the two subclades within Macowania. Both subclades exhibit strong signals of range allopatry, suggesting that geographic isolation was important in speciation. One subclade, associated with dry, rocky environments at high altitudes, shows very little morphological and ecological differentiation but high range allopatry. The other subclade occupies a greater variety of habitats and exhibits far greater morphological differentiation, but contains species with overlapping distribution ranges.
Conclusions
Species in Macowania are likely to have diversified in response to tectonic uplift, and we invoke uplift and uplift-mediated erosion as the main drivers of speciation. The greater relative morphological divergence in sympatric species of Macowania indicates that speciation in the non-sympatric taxa may not have required obvious adaptive differences, implying that simple geographic isolation was the driving force for speciation (?neutral speciation?). }
}
Taxa for Study 15214
Citation title:
"Erosive processes after tectonic uplift stimulate vicariant and adaptive speciation : evolution in an Afrotemperate-endemic paper daisy genus".
Study name:
"Erosive processes after tectonic uplift stimulate vicariant and adaptive speciation : evolution in an Afrotemperate-endemic paper daisy genus".
This study is part of submission 15214
(Status: Published).
Taxa
ID |
Taxon Label |
NCBI taxid |
uBIO namebankID |
1356234 |
Arrowsmithia styphelioides HB13266 |
112339
|
5991625
|
1356222 |
Arrowsmithia styphelioides NGB2129 |
112339
|
5991625
|
1356243 |
Arrowsmithia styphelioides NGB2188 |
112339
|
5991625
|
1356254 |
Athrixia angustissima |
|
9013301
|
1356255 |
Athrixia arachnoidea |
|
9013317
|
1356247 |
Athrixia elata |
|
9013469
|
1356231 |
Athrixia fontana |
|
9013488
|
1356252 |
Athrixia phylicoides |
|
3442902
|
1356223 |
Comborhiza virgata |
|
9306994
|
1356220 |
Galeomma oculus-cati |
|
9100487
|
1356264 |
Ifloga spicata |
|
5932045
|
1356249 |
Leysera leyseroides |
|
5932419
|
1356260 |
Macowania abyssinica F12210 |
|
10546458
|
1356240 |
Macowania abyssinica P11650 |
|
10546458
|
1356226 |
Macowania conferta NGB2245 |
|
9013152
|
1356227 |
Macowania conferta NGB2246 |
|
9013152
|
1356217 |
Macowania corymbosa JB002 |
|
9013192
|
1356221 |
Macowania corymbosa N1672 |
|
9013192
|
1356265 |
Macowania corymbosa NGB2177 |
|
9013192
|
1356250 |
Macowania deflexa NGB2173 |
|
10546459
|
1356233 |
Macowania deflexa NGB2178 |
|
10546459
|
1356235 |
Macowania ericifolia |
|
10546460
|
1356262 |
Macowania glandulosa HB17984 |
|
9013205
|
1356261 |
Macowania glandulosa NGB2181 |
|
9013205
|
1356228 |
Macowania hamata JR1826 |
|
9013219
|
1356267 |
Macowania hamata NGB2166 |
|
9013219
|
1356239 |
Macowania hamata W10145 |
|
9013219
|
1356266 |
Macowania pinifolia A7875 |
|
9013650
|
1356256 |
Macowania pinifolia JB003 |
|
9013650
|
1356230 |
Macowania pinifolia JB004 |
|
9013650
|
1356232 |
Macowania pinifolia MPR74 |
|
9013650
|
1356218 |
Macowania pulvinaris JEV1569 |
|
9013235
|
1356236 |
Macowania pulvinaris K1581 |
|
9013235
|
1356241 |
Macowania pulvinaris NGB2140 |
|
9013235
|
1356259 |
Macowania revoluta JB001 |
|
3445664
|
1356242 |
Macowania revoluta JB005 |
|
3445664
|
1356237 |
Macowania sororis FKH1714 |
|
9013285
|
1356219 |
Macowania sororis NGB2161 |
|
9013285
|
1356263 |
Macowania sororis TRG1237 |
|
9013285
|
1356238 |
Macowania tenuifolia K2079 |
|
9013287
|
1356229 |
Macowania tenuifolia K2100 |
|
9013287
|
1356246 |
Macowania tenuifolia NGB2211 |
|
9013287
|
1356224 |
Oedera genistifolia |
|
9307727
|
1356258 |
Oedera steyniae |
|
9307826
|
1356251 |
Oedera uniflora NGB1597 |
|
9307842
|
1356225 |
Pentatrichia petrosa |
112383
|
5960436
|
1356244 |
Relhania acerosa NGB2137 |
|
9010944
|
1356253 |
Relhania dieterlenii |
|
9011334
|
1356248 |
Relhania rotundifolia |
379284
|
9011995
|
1356257 |
Rhynchopsidium sessiliflorum |
|
10551255
|
1356245 |
Rosenia humilis |
81518
|
5872172
|