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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Geographically contrasting biodiversity reductions in a widespread New Zealand seabird
Molecular Ecology, Volume 24, No. 18, Year 2015
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Description
Unravelling prehistoric anthropogenic impacts on biodiversity represents a key challenge for biologists and archaeologists. New Zealand's endemic Stewart Island Shag (Leucocarbo chalconotus) comprises two distinct phylogeographic lineages, currently restricted to the country's south and southeast. However, fossil and archaeological remains suggest a far more widespread distribution at the time of Polynesian settlement ca. 1280 AD, encompassing much of coastal South Island. We used modern and ancient DNA, radiocarbon dating, and Bayesian modelling, to assess the impacts of human arrival on this taxon. Our analyses show that the southeast South Island (Otago) lineage was formerly widespread across coastal South Island, but experienced dramatic population extinctions, range retraction and lineage loss soon after human arrival. By comparison, the southernmost (Foveaux Strait) lineage has experienced a relatively stable demographic and biogeographic history since human arrival, retaining much of its mitochondrial diversity. Archaeological data suggest that these contrasting demographic histories (retraction vs. stability) reflect differential human impacts in mainland South Island vs. Foveaux Strait, highlighting the importance of testing for temporal and spatial variation in human-driven faunal declines. © 2015 John Wiley & Sons Ltd.
Authors & Co-Authors
Rawlence, Nicolas J.
New Zealand, Dunedin
University of Otago
Kennedy, Martyn
New Zealand, Dunedin
University of Otago
Anderson, Christian N.K.
United States, La Jolla
University of California, San Diego
Prost, Stefan
United States, Berkeley
University of California, Berkeley
New Zealand, Dunedin
University of Otago
United States, Tempe
Arizona State University
Till, Charlotte E.
New Zealand, Dunedin
University of Otago
Smith, Ian W.G.
New Zealand, Dunedin
University of Otago
Scofield, R. P.
New Zealand, Christchurch
Canterbury Museum
Tennyson, Alan James Drummond
New Zealand, Wellington
Museum of new Zealand- te Papa Tongarewa
Matisoo-Smith, Elizabeth A.
New Zealand, Dunedin
University of Otago
Waters, Jonathan M.
New Zealand, Dunedin
University of Otago
Statistics
Citations: 19
Authors: 10
Affiliations: 6
Identifiers
Doi:
10.1111/mec.13338
ISSN:
09621083
Research Areas
Genetics And Genomics
Study Design
Cross Sectional Study