Abstract:
:Organismal traits interact with environmental variation to mediate how species respond to shared landscapes. Thus, differences in traits related to dispersal ability or physiological tolerance may result in phylogeographic discordance among co-distributed taxa, even when they are responding to common barriers. We quantified climatic suitability and stability, and phylogeographic divergence within three reed frog species complexes across the Guineo-Congolian forests and Gulf of Guinea archipelago of Central Africa to investigate how they responded to a shared climatic and geological history. Our species-specific estimates of climatic suitability through time are consistent with temporal and spatial heterogeneity in diversification among the species complexes, indicating that differences in ecological breadth may partly explain these idiosyncratic patterns. Likewise, we demonstrated that fluctuating sea levels periodically exposed a land bridge connecting Bioko Island with the mainland Guineo-Congolian forest and that habitats across the exposed land bridge likely enabled dispersal in some species, but not in others. We did not find evidence that rivers are biogeographic barriers across any of the species complexes. Despite marked differences in the geographic extent of stable climates and temporal estimates of divergence among the species complexes, we recovered a shared pattern of intermittent climatic suitability with recent population connectivity and demographic expansion across the Congo Basin. This pattern supports the hypothesis that genetic exchange across the Congo Basin during humid periods, followed by vicariance during arid periods, has shaped regional diversity. Finally, we identified many distinct lineages among our focal taxa, some of which may reflect incipient or unrecognized species.
journal_name
Mol Ecoljournal_title
Molecular ecologyauthors
Bell RC,Parra JL,Badjedjea G,Barej MF,Blackburn DC,Burger M,Channing A,Dehling JM,Greenbaum E,Gvoždík V,Kielgast J,Kusamba C,Lötters S,McLaughlin PJ,Nagy ZT,Rödel MO,Portik DM,Stuart BL,VanDerWal J,Zassi-Boulou AG,doi
10.1111/mec.14260subject
Has Abstractpub_date
2017-10-01 00:00:00pages
5223-5244issue
19eissn
0962-1083issn
1365-294Xjournal_volume
26pub_type
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