A palaeoenvironmental record of natural and human change from the Auckland Isthmus, New Zealand, during the late Holocene

A multi-proxy analysis of a sediment core from Waiatarua, Auckland Isthmus, adds to an environmental history from the local wetland spanning the Late Glacial to modern times. Several distal tephra were recorded in the core: 8.5 ka Rotoma (reworked), 6.1 ka Tuhua (primary and reworked), most likely t...

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Bibliographic Details
Published in:Journal of the Royal Society of New Zealand 2002-06, Vol.32 (2), p.337-353
Main Authors: Horrocks, M., Deng, Y., Nichol, S. L., Shane, P. A., Ogden, J.
Format: Article
Language:English
Subjects:
Auckland Isthmus
diatoms
Holocene
palynology
tephra
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Summary:A multi-proxy analysis of a sediment core from Waiatarua, Auckland Isthmus, adds to an environmental history from the local wetland spanning the Late Glacial to modern times. Several distal tephra were recorded in the core: 8.5 ka Rotoma (reworked), 6.1 ka Tuhua (primary and reworked), most likely the 1.8 ka Taupo (the latter is previously unreported for the Auckland Isthmus), and one unidentified, possibly 665 yr BP Kaharoa. Pollen and diatom analyses of the core show that during the period c. 6000-c. 4800 yr BP, the site was a lake fringed with Cyperaceae/Leptospermum swamp. The lake became progressively shallower after c. 4800 yr BP, probably due to hydroseral infilling. Surrounding the lake was forest dominated by Dacrydium, Prumnopitys, Metrosideros, and Nestegis. Transition to the Polynesian era appears unclear because the site probably endured a hiatus due to destruction of peat by burning in European times.
ISSN:0303-6758
1175-8899
DOI:10.1080/03014223.2002.9517698