Institute of Ecology, College of Urban and Environmental Sciences, and Key Laboratory of Earth Surface Processes of Ministry of Education, Peking University, 100871, Beijing, China.
Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, University of Copenhagen, Universitetsparken 15, 2100, Copenhagen Ø, Denmark.
Nat Commun. 2023 May 30;14(1):2990. doi: 10.1038/s41467-023-38375-y.
Floristic regions reflect the geographic organization of floras and provide essential tools for biological studies. Previous global floristic regions are generally based on floristic endemism, lacking a phylogenetic consideration that captures floristic evolution. Moreover, the contribution of tectonic dynamics and historical and current climate to the division of floristic regions remains unknown. Here, by integrating global distributions and a phylogeny of 12,664 angiosperm genera, we update global floristic regions and explore their temporal changes. Eight floristic realms and 16 nested sub-realms are identified. The previously-defined Holarctic, Neotropical and Australian realms are recognized, but Paleotropical, Antarctic and Cape realms are not. Most realms have formed since Paleogene. Geographic isolation induced by plate tectonics dominates the formation of floristic realms, while current/historical climate has little contribution. Our study demonstrates the necessity of integrating distributions and phylogenies in regionalizing floristic realms and the interplay of macroevolutionary and paleogeographic processes in shaping regional floras.
植物区系反映了植物区系的地理组织，为生物研究提供了重要工具。以前的全球植物区系通常基于植物区系特有性，缺乏捕捉植物区系进化的系统发育考虑。此外，构造动力学以及历史和当前气候对植物区系分区的贡献仍然未知。在这里，我们通过整合全球分布和 12664 个被子植物属的系统发育，更新了全球植物区系，并探讨了它们的时间变化。确定了 8 个植物区系域和 16 个嵌套的亚区。以前定义的全北极、新热带和澳大利亚区系得到了认可，但古热带、南极和开普区系没有得到认可。大多数区系是在古近纪形成的。板块构造引起的地理隔离主导了植物区系域的形成，而当前/历史气候的贡献很小。我们的研究表明，在划分植物区系域时，将分布和系统发育相结合的必要性，以及宏观进化和古地理过程在塑造区域植物群方面的相互作用。
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