dc.contributor.author | Kender, S | |
dc.contributor.author | Kaminski, MA | |
dc.date.accessioned | 2018-06-25T08:59:16Z | |
dc.date.issued | 2013-01-01 | |
dc.description.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 hrideauxi, associated with open-ocean environments and a paleodepth probably > 200 m, to a younger assemblage dominated by Rhahdammina 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. | en_GB |
dc.identifier.citation | Vol. 43, pp. 99 - 109 | en_GB |
dc.identifier.doi | 10.2113/gsjfr.43.1.99 | |
dc.identifier.uri | http://hdl.handle.net/10871/33284 | |
dc.language.iso | en | en_GB |
dc.publisher | Cushman Foundation for Foraminiferal Research | en_GB |
dc.relation.source | Counts of all foraminifera in the studied samples from ACEX Hole M0002A, Lomonosov Ridge. This appendix can be found on the Cushman
Foundation website in the JFR Article Data Repository (http://www.cushmanfoundation.org/jfr/index.html) as item number JFR-DR2013003. | en_GB |
dc.rights | © 2013 Cushman Foundation for Foraminiferal Research | en_GB |
dc.title | Arctic ocean benthic foraminiferal faunal change associated with the onset of perennial sea ice in the Middle Miocene | en_GB |
dc.type | Article | en_GB |
dc.identifier.issn | 0096-1191 | |
dc.description | This is the author accepted manuscript. The final version is available from the publisher via the DOI in this record | en_GB |
dc.identifier.journal | Journal of Foraminiferal Research | en_GB |