Augustinus, P., Bleakley, N., Deng, Y., Shane, P., and Cochran, U. 2008. Rapid change in early Holocene environments inferred from Lake Pupuke, Auckland City, New Zealand. J. Quaternary Sci., Vol. 23 pp. 435–447. ISSN 0267-8179.
Rapid change in early Holocene environments inferred from Lake Pupuke, Auckland City, New Zealand†
Article first published online: 20 FEB 2008
Copyright © 2008 John Wiley & Sons, Ltd.
Journal of Quaternary Science
Volume 23, Issue 5, pages 435–447, July 2008
How to Cite
Augustinus, P., Bleakley, N., Deng, Y., Shane, P. and Cochran, U. (2008), Rapid change in early Holocene environments inferred from Lake Pupuke, Auckland City, New Zealand. J. Quaternary Sci., 23: 435–447. doi: 10.1002/jqs.1153
- Issue published online: 19 JUN 2008
- Article first published online: 20 FEB 2008
- Manuscript Accepted: 5 SEP 2007
- Manuscript Revised: 19 AUG 2007
- Manuscript Received: 27 FEB 2007
- Royal Society of New Zealand Marsden Fund. Grant Number: UOA0517
- University of Auckland Research Committee
- Australian Institute for Nuclear Science and Engineering. Grant Number: AINGRA05004
- lake sediment;
- organic matter geochemistry;
- Lake Pupuke;
- New Zealand
Sediment cores from Lake Pupuke in Auckland City, New Zealand, contain a high-resolution millennial to centennial-scale record of changing climate and catchment hydrology spanning the past ca. 10 000 years. Here, we focus on the period between 9500 ± 25 and 7000 ± 155 cal. yr BP during which grain size, diatom palaeoecology, biogenic silica concentrations, sediment elemental and carbon isotope geochemistry reflect changes in sediment sources and lake conditions, with a significant event commencing at ca. 8240 cal. yr BP, commensurate with a lowering of lake level, faster erosion rates and increased sediment influx with a duration of ca. 360 yrs. However, the changes in the lake are not reflected in the terrestrial vegetation, where the pollen record indicates that podocarp forest dominated the Auckland region, with apparent environmental stability during this part of the early Holocene. The synchronous change in most of the proxies between ca. 8240 and 7880 cal. yr BP at Lake Pupuke indicates the presence of a sustained episode of relatively low lake level and concomitant increased rate of erosion in the early Holocene that appears to be at least partly coeval with the 8200 cal. yr BP meltwater event proposed for the North Atlantic region. Copyright © 2008 John Wiley & Sons, Ltd.