Arctic Ocean Benthic Foraminiferal Faunae Change Associated with the Onset of Perennial Sea Ice in the Middle Miocene

Abstract

Research Article| January 01, 2013 Arctic Ocean Benthic Foraminiferal Faunae Change Associated with the Onset of Perennial Sea Ice in the Middle Miocene Sev Kender; Sev Kender 4 1 British Geological Survey, Keyworth, Nottingham, NG12 5GG, U.K. 4 Correspondence author. E-mail: sev.kender@bgs.ac.uk Search for other works by this author on: GSW Google Scholar Michael A. Kaminski Michael A. Kaminski 2 Earth Sciences Department, King Fahd University of Petroleum and Minerals, P.O. Box 701, Dhahran 31261, Saudi Arabia3 Department of Earth Sciences, University College London, Gower Street, London WC1E 6BT, U.K. Search for other works by this author on: GSW Google Scholar Journal of Foraminiferal Research (2013) 43 (1): 99–109. https://doi.org/10.2113/gsjfr.43.1.99 Article history received: 05 May 2012 accepted: 09 Oct 2012 first online: 13 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Sev Kender, Michael A. Kaminski; Arctic Ocean Benthic Foraminiferal Faunae Change Associated with the Onset of Perennial Sea Ice in the Middle Miocene. Journal of Foraminiferal Research 2013;; 43 (1): 99–109. doi: https://doi.org/10.2113/gsjfr.43.1.99 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 SocietyJournal of Foraminiferal Research Search Advanced Search Abstract Understanding how Arctic Ocean deep-water ecology responded to past climatic events is of importance in assessing the region’s sensitivity to environmental change. Here we present the first quantitative Miocene-Pliocene benthic foraminiferal records from the central Arctic Ocean, Lomonosov Ridge, IODP Hole M0002A. Despite significant dissolution and the absence of calcareous tests, these data show a significant faunal change occurred at ~14 Ma, characterized by a change from an older, relatively diverse assemblage including Reticulophragmium pusillum, Ammolagena clavata, and Recurvoides brideauxi, associated with open-ocean environments and a paleodepth probably >200 m, to a younger assemblage dominated by Rhabdammina spp. and the endemic Arctic benthic foraminifera Alveolophragmium polarensis. Sedimentologic proxies indicate the onset of perennial sea ice in the central Arctic Ocean likely occurred in conjunction with the faunal change, suggesting that this onset and increased ice rafting had a long-term impact on bottom-water ecology in the central Arctic Ocean. This ecologic change may have been related to changes in the type, quantity, and duration of organic carbon flux, which may also explain the documented increase in total sedimentary organic carbon at the same time, possibly indicative of increased productivity. In the younger section of M0002A, from ~12.6 Ma, abundances are too low for clear paleoecologic interpretations. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.