Analysis of coprolites from the extinct mountain goat Myotragus balearicus

Frido Welker, Elza Duijm, Kristiaan J. van der Gaag, Bas van Geel, Peter de Knijff, Jacqueline van Leeuwen, Dick Mol, Johannes van der Plicht, Niels Raes, Jelle Reumer, Barbara Gravendeel

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Abstract

Humans colonized the Balearic Islands 5–4 ka ago. They arrived in a uniquely adapted ecosystem with the Balearic mountain goat Myotragus balearicus (Bovidae, Antilopinae, Caprini) as the only large mammal. This mammal went extinct rapidly after human arrival. Several hypotheses have been proposed to explain the extinction of M. balearicus. For the present study ancient DNA analysis (Sanger sequencing, Roche-454, Ion Torrent), and pollen and macrofossil analyses were performed on preserved coprolites from M. balearicus, providing information on its diet and paleo-environment. The information retrieved shows that M. balearicus was heavily dependent on the Balearic box species Buxus balearica during at least part of the year, and that it was most probably a browser. Hindcast ecological niche modelling of B. balearica shows that local distribution of this plant species was affected by climate changes. This suggests that the extinction of M. balearicus can be related to the decline and regional extinction of a plant species that formed a major component of its diet. The vegetation change is thought to be caused by increased aridity occurring throughout the Mediterranean. Previous hypotheses relating the extinction of M. balearicus directly to the arrival of humans on the islands must therefore be adjusted.
Original languageEnglish
Pages (from-to)106-116
Number of pages11
JournalQuaternary Research
Volume81
Issue number1
DOIs
Publication statusPublished - 2014

Keywords

  • Ecological niche modelling
  • DNA barcoding
  • Diet
  • Balearic Islands
  • Ancient DNA

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