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Significant loss of mitochondrial diversity within the last century due to extinction of peripheral populations in eastern gorillas
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
Univ Kiel, Inst Anim Breeding & Husb, D-24098 Kiel, Germany.ORCID iD: 0000-0002-0840-8225
Univ Calif Davis, Dept Anthropol, One Shields Ave, Davis, CA 95616 USA;Dian Fossey Gorilla Fund Int, 800 Cherokee Ave SE, Atlanta, GA 30315 USA.
Dian Fossey Gorilla Fund Int, 800 Cherokee Ave SE, Atlanta, GA 30315 USA.
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2018 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 8, article id 6551Article in journal (Refereed) Published
Abstract [en]

Species and populations are disappearing at an alarming rate as a direct result of human activities. Loss of genetic diversity associated with population decline directly impacts species' long-term survival. Therefore, preserving genetic diversity is of considerable conservation importance. However, to assist in conservation efforts, it is important to understand how genetic diversity is spatially distributed and how it changes due to anthropogenic pressures. In this study, we use historical museum and modern faecal samples of two critically endangered eastern gorilla taxa, Grauer's (Gorilla beringei graueri) and mountain gorillas (Gorilla beringei beringei), to directly infer temporal changes in genetic diversity within the last century. Using over 100 complete mitochondrial genomes, we observe a significant decline in haplotype and nucleotide diversity in Grauer's gorillas. By including historical samples from now extinct populations we show that this decline can be attributed to the loss of peripheral populations rather than a decrease in genetic diversity within the core range of the species. By directly quantifying genetic changes in the recent past, our study shows that human activities have severely impacted eastern gorilla genetic diversity within only four to five generations. This rapid loss calls for dedicated conservation actions, which should include preservation of the remaining peripheral populations.

Place, publisher, year, edition, pages
2018. Vol. 8, article id 6551
National Category
Biochemistry and Molecular Biology Genetics
Identifiers
URN: urn:nbn:se:uu:diva-354951DOI: 10.1038/s41598-018-24497-7ISI: 000430795000050PubMedID: 29695730OAI: oai:DiVA.org:uu-354951DiVA, id: diva2:1223558
Funder
Swedish Research CouncilKnut and Alice Wallenberg FoundationSwedish Research Council Formas, 2015-676Available from: 2018-06-25 Created: 2018-06-25 Last updated: 2018-06-25Bibliographically approved

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van der Valk, TomSandoval-Castellanos, EdsonGuschanski, Katerina
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