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Genomic insights into the conservation status of the world?s last remaining Sumatran rhinoceros populations

von Seth, Johanna, Dussex, Nicolas, Díez-del-Molino, David, van der Valk, Tom, Kutschera, Verena E., Kierczak, Marcin, Steiner, Cynthia C., Liu, Shanlin, Gilbert, M. Thomas P., Sinding, Mikkel-Holger S., Prost, Stefan, Guschanski, Katerina, Nathan, Senthilvel K. S. S., Brace, Selina, Chan, Yvonne L., Wheat, Christopher W., Skoglund, Pontus, Ryder, Oliver A., Goossens, Benoit ORCID:, Götherström, Anders and Dalén, Love 2021. Genomic insights into the conservation status of the world?s last remaining Sumatran rhinoceros populations. Nature Communications 12 , 2393. 10.1038/s41467-021-22386-8

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Small populations are often exposed to high inbreeding and mutational load that can increase the risk of extinction. The Sumatran rhinoceros was widespread in Southeast Asia, but is now restricted to small and isolated populations on Sumatra and Borneo, and most likely extinct on the Malay Peninsula. Here, we analyse 5 historical and 16 modern genomes from these populations to investigate the genomic consequences of the recent decline, such as increased inbreeding and mutational load. We find that the Malay Peninsula population experienced increased inbreeding shortly before extirpation, which possibly was accompanied by purging. The populations on Sumatra and Borneo instead show low inbreeding, but high mutational load. The currently small population sizes may thus in the near future lead to inbreeding depression. Moreover, we find little evidence for differences in local adaptation among populations, suggesting that future inbreeding depression could potentially be mitigated by assisted gene flow among populations.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Biosciences
Publisher: Nature Research
ISSN: 2041-1723
Date of First Compliant Deposit: 17 May 2021
Date of Acceptance: 1 March 2021
Last Modified: 04 May 2023 20:38

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