Last global extinction in the deep sea during the mid-Pleistocene climate transition

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doi: 10.1029/2007PA001424
Author(s): Hayward, Bruce W.; Kawagata, Shungo; Grenfell, Hugh R.; Sabaa, Ashwaq T.; O'Neill, Tanya
Author Affiliation(s): Primary:
Geomarine Research, Auckland, New Zealand
Massey University, New Zealand
Volume Title: Paleoceanography
Source: Paleoceanography, 22(3). Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0883-8305 CODEN: POCGEP
Note: In English. 75 refs.; illus., incl. sects., 2 tables, sketch maps
Summary: Twenty percent (19 genera, 95 species) of cosmopolitan, deep-sea (500-4000 m), benthic foraminiferal species became extinct during the late Pliocene-middle Pleistocene (3-0.12 Ma), with the peak of extinctions (76 species) occurring during the mid-Pleistocene Climate Transition (MPT, 1.2-0.55 Ma). One whole family (Stilostomellidae, 30 species) was wiped out, and a second (Pleurostomellidae, 29 species) was decimated with just one species possibly surviving through to the present. Our studies at 21 deep-sea core sites show widespread pulsed declines in abundance and diversity of the extinction group species during more extreme glacials, with partial interglacial recoveries. These declines started in the late Pliocene in southern sourced deep water masses (Antarctic Bottom Water, Circumpolar Deep Water) and extending into intermediate waters (Antarctic Intermediate Water, North Atlantic Deep Water) in the MPT, with the youngest declines in sites farthest downstream from high-latitude source areas for intermediate waters. (modif. j. abst.)
Year of Publication: 2007
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Antarctic Bottom Water; Antarctic Intermediate Water; Atlantic Ocean; Biodiversity; Caribbean Sea; Cenozoic; Circumpolar Deep Water; Climate change; Cores; Currents; Deep-sea environment; Extinction; Foraminifera; Glacial environment; Glaciomarine environment; Global; Ice; Indian Ocean; Interglacial environment; Invertebrata; Leg 117; Leg 162; Leg 165; Marine environment; Marine sediments; Microfossils; Middle Pleistocene; North Atlantic; North Atlantic Deep Water; ODP Site 1000; ODP Site 722; ODP Site 980; Ocean Drilling Program; Ocean currents; Paleo-oceanography; Paleocirculation; Paleoclimatology; Paleocurrents; Paleoecology; Pleistocene; Protista; Quaternary; Sea ice; Sediments; Trophic analysis; World ocean
Coordinates: N552906 N552906 W0144208 W0144208
N163313 N163313 W0795200 W0795200
N163718 N163719 E0594746 E0594745
Record ID: 2009007664
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