concluding that the cooling of the climate was a key factor for their speciation. “The study is the first to address the distribution and diversification patterns of a megadiverse genus of plants on a global scale and suggests that climate warming is not only causing species extinction, but could also negatively affect the processes that generate them. ”, Affirms Santiago Martín-Bravo, researcher in the Botany Area of ​​the UPO and one of the main co-authors of the study. The authors have combined genetic and fossil information in their study to unravel the causes of Carex’s global diversification. The work shows that this genus originated in Asia, from where it has been able to colonize regions around the world and extraordinarily different ecological niches. During

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this process, Carex has clearly been favored by Belgium Phone Number List maintaining a cold global climate for the past 10 million years. Proof of this is the coincidence in time of regional cooling events such as the freezing of Antarctica or the Pleistocene glaciations with the massive appearance of Carex species in regions affected by these climatic changes, such as North America or New Zealand. The conclusions of this work are of general interest to understand how, when and why species are generated, as well as the causes of their uneven distribution, and especially the role of global climate as a driver of the genesis of biodiversity. “These questions are especially relevant in the current context of the climate crisis and the massive extinction of species, which

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accentuates the need to know and understand how nature responds to the climate in order to conserve and manage it in a sustainable way”, argues Pedro Jiménez-Mejías , researcher in the Botany Area of ​​the UAM and another of the main co-authors of the work. The study has been on the cover of the November issue of the international scientific journal Journal of Systematics and Evolution. It is the culmination of more than a decade of work started with the Jiménez-Mejías postdoctoral project, developed in the United States, and which has made possible an international collaboration between a group of evolutionary biologists and botanists from institutions in ten countries, among which Spain (with researchers from the Pablo de Olavide,

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