Ancient DNA from bulk bone reveals past genetic diversity of vertebrate fauna on Kangaroo Island, Australia

Frederik V. Seersholm, Alicia Grealy, Matthew C. McDowell, Theresa L. Cole, Lee J. Arnold, Gavin J. Prideaux, Michael Bunce

Research output: Contribution to journalArticlepeer-review

Abstract

It is indisputable that much of Australia's modern biodiversity decline was triggered by European settlement. However, the driver(s) of pre-European extinctions and extirpations are more challenging to identify, particularly on islands where animals are faced with the additional pressures imposed by isolation. Kangaroo Island, South Australia, has been identified as a potential haven for the reintroduction of endangered animals, but the genetic relationship between reintroduction candidates on the mainland and their extinct relatives on Kangaroo Island is poorly understood. Here, we present a late Pleistocene to mid-Holocene genetic record from Kangaroo Island based on bulk bone metabarcoding of two thousand bone fragments excavated from Kelly Hill Cave. We detect 33 species of bird, reptile, fish and mammal and report additional intra-specific genetic diversity in Kangaroo Island's now extinct population of spotted-tailed quoll. Furthermore, we provide genetic evidence that the Eastern grey kangaroo formerly inhabited Kangaroo Island. Taken together, these data establish a more complete baseline of local biodiversity against which reintroduction programmes and bushfire recovery measures can be evaluated, which is more important than ever in light of the recent fires that devastated much of Kangaroo Island's flora and fauna.

Original languageEnglish
Article number106962
Number of pages9
JournalQuaternary Science Reviews
Volume262
DOIs
Publication statusPublished - 15 Jun 2021

Keywords

  • Ancient DNA
  • Bulk bone
  • Environmental DNA
  • Kangaroo island
  • Metabarcoding
  • Palaeontology
  • Paleoenvironmental reconstruction

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