Carrillo, Juan D. Faurby, Søren Silvestro, Daniele Zizka, Alexander Jaramillo, Carlos Bacon, Christine D. Antonelli, Alexandre 2020-10-20 The biological interchange between North and South America associated with the formation of the Isthmus of Panama is key to defining current gradients of species diversity. A major gap in our understanding of the interchange is its asymmetry, where mammals of North American origin attained higher diversity in South America than vice versa. The prevailing view is that this asymmetry resulted from higher origination of immigrant mammals in South America. In contrast, we find that asymmetry results from high extinction of native mammals in South America, which reduced the diversity of native mammals available to disperse northwards. These results shed light on the legacy of the biotic interchange to understand the current patterns of species diversity across the Americas. application/pdf https://folia.unifr.ch/global/documents/309099 https://folia.unifr.ch/documents/309099/files/sil_des.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.2009397117 info:eu-repo/semantics/openAccess License undefined Proceedings of the National Academy of Sciences. - 2020, vol. 117, no. 42, p. 26281–26287 info:eu-repo/classification/udc/57 Disproportionate extinction of South American mammals drove the asymmetry of the Great American Biotic Interchange http://purl.org/coar/resource_type/c_6501