Volume 32, Issue 6 pp. 770-781
Special Issue Article

Persistence of wetlands on North Stradbroke Island (south-east Queensland, Australia) during the last glacial cycle: implications for Quaternary science and biogeography

J. Tibby

Corresponding Author

J. Tibby

Geography, Environment and Population and Sprigg Geobiology Centre, University of Adelaide, Adelaide, Australia

Correspondence: J. Tibby, as above.

E-mail: [email protected]

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C. Barr

C. Barr

Geography, Environment and Population and Sprigg Geobiology Centre, University of Adelaide, Adelaide, Australia

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J. C. Marshall

J. C. Marshall

Water Planning Ecology, Queensland Department of Science, Information Technology and Innovation, Dutton Park, Australia

Australian Rivers Institute, Griffith University, Nathan, QLD, Australia

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G. B. McGregor

G. B. McGregor

Water Planning Ecology, Queensland Department of Science, Information Technology and Innovation, Dutton Park, Australia

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P. T. Moss

P. T. Moss

School of Earth and Environmental Sciences, the University of Queensland, Brisbane, Australia

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L. J. Arnold

L. J. Arnold

School of Physical Science, Environment Institute, Sprigg Geobiology Centre and Institute for Photonics and Advanced Sensing, University of Adelaide, Adelaide, Australia

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T. J. Page

T. J. Page

Water Planning Ecology, Queensland Department of Science, Information Technology and Innovation, Dutton Park, Australia

Australian Rivers Institute, Griffith University, Nathan, QLD, Australia

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D. Questiaux

D. Questiaux

School of Physical Science, Environment Institute, Sprigg Geobiology Centre and Institute for Photonics and Advanced Sensing, University of Adelaide, Adelaide, Australia

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J. Olley

J. Olley

Australian Rivers Institute, Griffith University, Nathan, QLD, Australia

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J. Kemp

J. Kemp

Australian Rivers Institute, Griffith University, Nathan, QLD, Australia

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N. Spooner

N. Spooner

School of Physical Science, Environment Institute, Sprigg Geobiology Centre and Institute for Photonics and Advanced Sensing, University of Adelaide, Adelaide, Australia

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L. Petherick

L. Petherick

School of Geography, Environment and Earth Sciences, University of Wellington, New Zealand

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D. Penny

D. Penny

Geoscience Department, University of Sydney, Australia

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S. Mooney

S. Mooney

School of School of Biological, Earth and Environmental Sciences, University of New South Wales, Australia

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E. Moss

E. Moss

Geoscience Department, University of Sydney, Australia

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First published: 22 August 2017
Citations: 25

ABSTRACT

Few Australian wetlands have persisted since the Last Glacial Maximum, with fewer still in existence through the entire last glacial cycle. The absence of wetlands, which itself indicates periods of moisture deficit, means there are few continuous climate and environmental change records covering this critical period. The lack of wetland persistence also raises the question of how plant and animal species that require permanent wetlands survived the last glacial cycle. Sixteen wetlands have been cored and dated on North Stradbroke Island (Minjerribah) – a large east Australian sand island – with basal dates reported from 10 sites for the first time. These wetlands range in age to over 200 000 years old, with six dating to the Last Glacial Maximum or earlier. There is no evidence of a stratigraphic discontinuity in the radiocarbon-based age–depth profiles, suggesting continuous deposition of highly organic sediment through the period covered by these ages (c. 40 ka). The persistence of these wetlands suggests that for much of the last 40 000 years, and for perhaps much longer, the regional moisture balance has been positive. Over the last glacial cycle, persistently wet conditions may have provided a refuge from regional drying, and thus contributed to the high genetic diversity of rainforest plants in the region. Vegetation and climate records from these sites will allow hypothesis testing about the drivers of both local and regional climate variability. Copyright © 2017 John Wiley & Sons, Ltd.

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