Spatial analysis of molecular variance (SAMOVA) for Berberis trifoliolata populations
Here we conduct research to understand the evolutionary history of a shrubby species known as Agarito (Berberis trifoliolata), an endemic species to the Chihuahuan Desert. We identify genetic signatures based on plastid DNA and AFLP markers and perform niche modelling and spatial connectivity analyses as well as niche modelling based on records in packrats to elucidate whether orogenic events such as mountain range uplift in the Miocene or the contraction/expansion dynamics of vegetation in response to climate oscillations in the Pliocene/Pleistocene had an effect on evolutionary processes in Agarito. Our results of current niche modelling and palaeomodelling showed that the area currently occupied by Berberis trifoliolata is substantially larger than it was during the Last Interglacial period and the Last Glacial Maximum. Agarito was probably confined to small areas in the Northeastern and gradually expanded its distribution just after the Last Glacial Maximum when the weather in the Chihuahuan Desert and adjacent regions became progressively warmer and drier. The most contracted range was predicted for the Interglacial period. Populations remained in stable areas during the Last Glacial Maximum and expanded at the beginning of the Holocene. Most genetic variation occured in populations from the Sierra Madre Oriental.
| Main Authors: | , , , |
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| Format: | dataSet biblioteca |
| Language: | eng |
| Published: |
Plos One
2017-02-01
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| Subjects: | Niche modelling, Niche modelling predictions, Last Glacial Maximum, Northeastern, Agarito, Last Interglacial period, https://purl.org/becyt/ford/1.5, |
| Online Access: | http://hdl.handle.net/11086/21004 |
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