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DOWNCORE DISTRIBUTION OF LIVING CALCAREOUS FORAMINIFERA AND STABLE ISOTOPES IN THE WESTERN BARENTS SEA

2008; Cushman Foundation for Foraminiferal Research; Volume: 38; Issue: 4 Linguagem: Inglês

10.2113/gsjfr.38.4.337

1943-264X

Е. В. Иванова, E. A. Ovsepyan, Bjørg Risebrobakken, A. A. Vetrov,

Arctic and Antarctic ice dynamics

Research Article| October 01, 2008 DOWNCORE DISTRIBUTION OF LIVING CALCAREOUS FORAMINIFERA AND STABLE ISOTOPES IN THE WESTERN BARENTS SEA Elena V. Ivanova; Elena V. Ivanova 3 1Shirshov Institute of Oceanology RAS, 36 Nakhimovsky Prosp., 117997, Moscow, Russia. 3Correspondence author. E-mail: e_v_ivanova@ocean.ru and e_v_ivanova@mail.ru Search for other works by this author on: GSW Google Scholar Ekaterina A. Ovsepyan; Ekaterina A. Ovsepyan 1Shirshov Institute of Oceanology RAS, 36 Nakhimovsky Prosp., 117997, Moscow, Russia. Search for other works by this author on: GSW Google Scholar Bjørg Risebrobakken; Bjørg Risebrobakken 2Bjerknes Centre for Climate Research, Alle′gaten 55, 5007 Bergen, Norway. Search for other works by this author on: GSW Google Scholar Alexander A. Vetrov Alexander A. Vetrov 1Shirshov Institute of Oceanology RAS, 36 Nakhimovsky Prosp., 117997, Moscow, Russia. Search for other works by this author on: GSW Google Scholar Author and Article Information Elena V. Ivanova 3 1Shirshov Institute of Oceanology RAS, 36 Nakhimovsky Prosp., 117997, Moscow, Russia. Ekaterina A. Ovsepyan 1Shirshov Institute of Oceanology RAS, 36 Nakhimovsky Prosp., 117997, Moscow, Russia. Bjørg Risebrobakken 2Bjerknes Centre for Climate Research, Alle′gaten 55, 5007 Bergen, Norway. Alexander A. Vetrov 1Shirshov Institute of Oceanology RAS, 36 Nakhimovsky Prosp., 117997, Moscow, Russia. 3Correspondence author. E-mail: e_v_ivanova@ocean.ru and e_v_ivanova@mail.ru Publisher: Cushman Foundation for Foraminiferal Research Received: 19 Jun 2007 Accepted: 04 Jun 2008 First Online: 03 Oct 2017 Online ISSN: 1943-264X Print ISSN: 0096-1191 © 2008 Journal of Foraminiferal Research Journal of Foraminiferal Research (2008) 38 (4): 337–356. https://doi.org/10.2113/gsjfr.38.4.337 Article history Received: 19 Jun 2007 Accepted: 04 Jun 2008 First Online: 03 Oct 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Elena V. Ivanova, Ekaterina A. Ovsepyan, Bjørg Risebrobakken, Alexander A. Vetrov; DOWNCORE DISTRIBUTION OF LIVING CALCAREOUS FORAMINIFERA AND STABLE ISOTOPES IN THE WESTERN BARENTS SEA. Journal of Foraminiferal Research 2008;; 38 (4): 337–356. doi: https://doi.org/10.2113/gsjfr.38.4.337 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 The density and vertical distribution of living calcareous foraminifera have been studied in six box cores from the shelf depressions in the Western Barents Sea in relation to total organic carbon content and flux to the seafloor, primary production, sedimentation rates, bottom-water masses and stable isotopes. It appears that at least several infaunal species—like Melonis barleeanus, Islandiella norcrossi and perhaps Nonionellina labradorica, Cribroelphidium excavatum clavatum and Cassidulina reniforme—might penetrate down to 8–10 cm below the sediment surface searching for a favorable microhabitat. A deep penetration of some living specimens, notably epifaunal Cibicides lobatulus, into the sediment might result from bioturbation and survival inside polychaete tubes. The highest foraminiferal abundances (up to 130–240 sp/50 cm3) of the six cores were found in the most productive areas on the West Spitsbergen shelf and in the mouth of the Isfjorden (Svalbard) and likely resulted from fast sedimentation and mass accumulation rates of marine organic matter. These factors seemed to be responsible for deeper penetration and habitat depth of the above-mentioned species on the shelf as compared to the northern Barents Sea continental slope. However, the abundance of living calcareous foraminifera on the slope was much higher than in our study, probably due to a greater flux of particulate organic matter produced during the seasonal phytoplankton bloom along the ice-edge margin. In general, more depleted δ18O values (of unstained foraminifera) are found in the box cores obtained beneath pure Atlantic water compared to those beneath cooler bottom water. Estimated δ18O disequilibrium effects for Nonionellina labradorica (0.28‰), Cibicides lobatulus (−0.76‰) and Melonis barleeanus (−0.41‰) support previous findings for these species. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.