Results 1 to 2 of 2

Thread: New Zealand Black Swan

Threaded View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Legacy Account
    United Kingdom
    mtDNA (M)

    United Kingdom

    New Zealand Black Swan

    Nicolas J. Rawlence, et al., Ancient DNA and morphometric analysis reveal extinction and replacement of New Zealand's unique black swans, Proceedings of the Royal Society B, Volume 284, issue 1859

    Prehistoric human impacts on megafaunal populations have dramatically reshaped ecosystems worldwide. However, the effects of human exploitation on smaller species, such as anatids (ducks, geese, and swans) are less clear. In this study we apply ancient DNA and osteological approaches to reassess the history of Australasia's iconic black swans (Cygnus atratus) including the palaeo-behaviour of prehistoric populations. Our study shows that at the time of human colonization, New Zealand housed a genetically, morphologically, and potentially ecologically distinct swan lineage (C. sumnerensis, Poūwa), divergent from modern (Australian) C. atratus. Morphological analyses indicate C. sumnerensis exhibited classic signs of the ‘island rule’ effect, being larger, and likely flight-reduced compared to C. atratus. Our research reveals sudden extinction and replacement events within this anatid species complex, coinciding with recent human colonization of New Zealand. This research highlights the role of anthropogenic processes in rapidly reshaping island ecosystems and raises new questions for avian conservation, ecosystem re-wilding, and de-extinction.

  2. The Following 3 Users Say Thank You to Jean M For This Useful Post:

     A Norfolk L-M20 (07-30-2017),  Elizabeth (07-31-2017),  Saetro (07-30-2017)

Similar Threads

  1. Replies: 9
    Last Post: 09-15-2017, 08:31 AM
  2. Black Sea flood: new estimate 9,300 BP
    By J1 DYS388=13 in forum Natural Sciences
    Replies: 0
    Last Post: 02-11-2017, 11:19 AM
  3. Every Black Hole Contains a New Universe
    By gravetti in forum Astronomy
    Replies: 2
    Last Post: 07-10-2016, 04:24 PM
  4. Oceania (incl. Australia & New Zealand) Archaeology and History News
    By History-of-Things in forum Archaeology (Prehistory)
    Replies: 8
    Last Post: 07-27-2013, 02:48 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts