Mid-Pleistocene benthic foraminiferal record in the Southwest Pacific, supplement to: Hayward, Bruce W; Grenfell, Hugh R; Sabaa, Ashwaq T; Sikes, Elisabeth L (2005): Deep-sea benthic foraminiferal record of the Middle Pleistocene Climate Transition in the South-west Pacific. In: M. J. Head and P. L. Gibbard (eds.). Early Middle Pleistocene transitions: the land-ocean evidence. Geological Society (London), Special Publication, 247, 85-115

DOI

Benthic foraminiferal faunas from three bathyal sequences provide a proxy record of oceanographic changes through the mid-Pleistocene transition (MPT) on either side of the Subtropical Front (STF), east of New Zealand. Canonical correspondence analyses show that factors related to water depth, latitude and climate cycles were more significant than oceanographic factors in determining changes in faunal assemblage composition over the last 1 Ma. Even so, mid-Pleistocene faunal changes are recognizable and can be linked to inferred palaeoceanographic causes. North of the largely stationary STF the faunas were less variable than to the south, perhaps reflecting the less extreme glacial-interglacial fluctuations in the overlying Subtropical Surface Water. Prior to Marine Isotope Stage (MIS) 21 and after MIS 15, the northern faunas had fairly constant composition, but during most of the MPT faunal composition fluctuated in response to climate-related food-supply variations. Faunal changes through the MPT suggest increasing food supply and decreasing dissolved bottom oxygen.

Identifier
DOI http://dx.doi.org/doi:10.1594/PANGAEA.705195
Metadata Access http://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite3&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.705195
Provenance
Creator Sikes, Elisabeth L;Sabaa, Ashwaq T;Hayward, Bruce W;Grenfell, Hugh R
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2005
Rights Creative Commons Attribution 3.0 Unported (CC-BY)
Representation
Language English
Resource Type Supplementary Collection of Datasets
Format application/zip
Coverage
Discipline Earth System Research
Spatial Coverage (46S-43S,172E-178W)
Temporal Point 1983-01-03T11:59:59Z