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Global deep-sea extinctions during the Pleistocene ice ages

2001; Geological Society of America; Volume: 29; Issue: 7 Linguagem: Inglês

10.1130/0091-7613(2001)029 2.0.co;2

1943-2682

Bruce W. Hayward,

Isotope Analysis in Ecology

Research Article| July 01, 2001 Global deep-sea extinctions during the Pleistocene ice ages Bruce W. Hayward Bruce W. Hayward 1Department of Geology, University of Auckland, Private Bag 92 019, Auckland, New Zealand Search for other works by this author on: GSW Google Scholar Author and Article Information Bruce W. Hayward 1Department of Geology, University of Auckland, Private Bag 92 019, Auckland, New Zealand Publisher: Geological Society of America Received: 15 Nov 2000 Revision Received: 02 Mar 2001 Accepted: 13 Mar 2001 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2001) 29 (7): 599–602. https://doi.org/10.1130/0091-7613(2001)029 2.0.CO;2 Article history Received: 15 Nov 2000 Revision Received: 02 Mar 2001 Accepted: 13 Mar 2001 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Bruce W. Hayward; Global deep-sea extinctions during the Pleistocene ice ages. Geology 2001;; 29 (7): 599–602. doi: https://doi.org/10.1130/0091-7613(2001)029 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The dark, near-freezing environment of the deep oceans is regarded as one of the most stable habitats on Earth, and this stability is generally reflected in the slow turnover rates (extinctions and appearances) of the organisms that live there. By far the best fossil record of deep-sea organisms is provided by the shells of benthic foraminifera (Protista). A little-known global extinction of deep-sea benthic foraminifera occurred during the Pleistocene ice ages. In the southwest Pacific, it caused the disappearance of at least two families, 15 genera, and 48 species (∼15%–25% of the fauna) of dominantly uniserial, elongate foraminifera with distinctive apertural modifications. These forms progressively died back and became extinct during glacial periods in the late Pliocene to middle Pleistocene (ca. 2.5–0.6 Ma); most extinctions occurred between 1.0 and 0.6 Ma, at the time of the middle Pleistocene climatic revolution. This first high-resolution study of this extinction event indicates that it was far more significant for deep-sea diversity loss than previously reported (10 species). The middle Pleistocene extinction was the most dramatic last phase of a worldwide decline in the abundance of these elongate forms, a phase that began during cooling near the Eocene-Oligocene boundary and continued during the middle Miocene. Clearly these taxa declined when the world cooled, but the reason is yet to be resolved. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.