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- W2005993708 abstract "Models are now commonly used to make inferences about the demographic past, but little attention has been given to the inference of complex, explicitly geographical population histories. Because the universe of potential histories can be infinitely large, external independent information, such as fossil or paleoclimatic data, can be instrumental for modeling complex histories. This approach can be enhanced further by using bioclimatic modeling, in which past distributions are reconstructed from an integration of paleoclimatic data with information from the contemporary ecological and physiological limits of a species.Such an approach is key to Hugall et al.'s new study [1xSee all References][1] on the effects of Pleistocene climate change on the fauna from the wet-tropical forests of North Queensland, Australia. By basing the bioclimatic model on the endemic snail Gnarosophia bellendenkerensis, the chances of recovering historical biogeographical details were increased because of the fine-scale persistence and low vagility of the species, thereby revealing the location of potential refugia, as well as the magnitude of change of suitable habitat in the fragments. Interestingly, not only did the snail's phylogeographic structure correspond to the predicted location of refugia, but a general agreement was also observed between quantitative estimates of population expansion from the sequence data and the models predicted changes in habitat size.Hugall et al. also considered these phylogeographic patterns in a comparative context. They showed that patterns of genetic variation in the snail represented a composite of various phylogeographic patterns observed in several vertebrate taxa. The model identified both common phylogeographic patterns that were predicted by the shared biogeographical history of the rainforest taxa, as well as idiosyncratic differences among the species. Because the model represents an independent demarcation of historical population structure, Hugall et al. were able to deduce that the departures from the predictions of the model arose from varied responses to the size and magnitude of change of suitable habitat, apparently reflecting different habitat requirements for species persistence.Although the results from the study are based on a qualitative fit of the data to the bioclimatic model, the utility of this approach for understanding the responses of species to past climate change and locating historical refugia is clear. This suggests that a fusion of these spatially explicit paleodistributional models with coalescent simulations to yield a statistical framework will indeed be promising for evaluating evolutionary questions." @default.
- W2005993708 created "2016-06-24" @default.
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- W2005993708 date "2002-08-01" @default.
- W2005993708 modified "2023-09-25" @default.
- W2005993708 title "Reconstructing rapid climate change from a snail's pace" @default.
- W2005993708 cites W2036346930 @default.
- W2005993708 doi "https://doi.org/10.1016/s0169-5347(02)02468-0" @default.
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