小型哺乳动物的物种多样化与气候特化有关，而物种积累则反映了进化时间

1. 信息

2. 摘要

Climatic specialisation, the restriction of species to particular climate regimes, may promote diversification via ecological divergence and dispersal limitation, but also increase extinction risk. To evaluate how climatic specialisation relates to diversification patterns in small mammals, a vertebrate group widely used in palaeoecological research, we analyse 4231 species belonging to the orders Rodentia, Chiroptera, Eulipotyphla, and Lagomorpha worldwide, combining climatic, geographic, and phylogenetic data. We find that nearly 40% of small mammal species are climatic specialists (restricted to one of five major climatic zones), and that half of these are climatic superspecialists (restricted to one of 30 sub-climatic zones), revealing widespread but uneven niche restriction across taxa and geography. At the family level, climatic superspecialisation is strongly associated with diversification, particularly for families consisting of species with shorter lifespans and smaller ranges. In contrast, family age is the main predictor of species richness, indicating that older families gradually accumulate species through time rather than through intrinsically faster diversification. Together, these findings support a dual macroevolutionary pattern linking ecology and evolution: levels of climatic specialisation are seemingly driven by diversification rates within lineages, whereas time largely explains the accumulation of species in small mammal families. Why some lineages diversify explosively while others remain species-poor is been a central question in evolutionary biology. This global analysis on small mammals shows that climatic specialisation is associated with diversification whereas evolutionary time largely explains species accumulation.

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4. 引用

@article{reyrodrguez2026,
  author = {Iván Rey-Rodríguez and Graciela Sotelo and Sara Gamboa and Adriana Oliver and Marta Matamala-Pagès and Sofía Galván and Adrián Castro-Insua and Neftalí Sillero and Sara Varela},
  title = {Diversification in small mammals is associated with climatic specialisation, whereas species accumulation reflects evolutionary time},
  journal = {Nature Communications},
  year = {2026},
  volume = {17},
  number = {1},
  pages = {10051},
  doi = {10.1038/s41467-026-77109-8},
  publisher = {Springer Science and Business Media LLC},
}