Planktonic Foraminifera in the Arctic; potentials and issues regarding modern and Quaternary populations

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doi: 10.1088/1755-1315/14/1/012005
Author(s): Eynaud, Frédérique
Author Affiliation(s): Primary:
Université de Bordeaux I, Laboratoire Environnements et Paléoenvironnements OCéaniques, Talence, France
Other:
Universidade do Algarve, Portugal
Université du Québec à Montréal, Canada
Volume Title: Ocean and climate changes in polar and subpolar environments; proceedings from the 2010 IODP-Canada/ECORD summer school
Volume Author(s): St-Onge, Guillaume, editor; Veiga-Pires, Cristina; Solignac, Sandrine
Source: IOP Conference Series. Earth and Environmental Science, 14(1); IODP-Canada summer school on 'Ocean and climate changes in polar and subpolar environments', Rimouski, QC, Canada, June 27-July 12, 2010, edited by Guillaume St-Onge, Cristina Veiga-Pires and Sandrine Solignac. Publisher: IOP Publishing, Bristol, United Kingdom. ISSN: 1755-1315
Note: In English. 46 refs.; illus., incl. sketch map
Summary: Calcareous microfossils are widely used by paleoceanographers to investigate past sea-surface hydrology. Among these microfossils, planktonic foraminifera are probably the most extensively used tool (e.g. [1] for a review), as they are easy to extract from the sediment and can also be used for coupled geochemical (e.g; δ18O, δ13C, Mg/Ca) and paleo-ecological investigations. Planktonic foraminifera are marine protists, which build a calcareous shell made of several chambers which reflect in their chemistry the properties of the ambient water-masses. Planktonic foraminifera are known to thrive in various habitats, distributed not only along a latitudinal gradient, but also along different water-depth intervals within surface waters (0-1000 m). Regarding their biogeographical distribution, planktonic foraminifera assemblages therefore mirror different water-masses properties, such as temperature, salinity and nutrient content of the surface water in which they live. The investigation of the specific composition of a fossil assemblage (relative abundances) is therefore a way to empirically obtain (paleo)information on past variations of sea-surface hydrological parameters. This paper focuses on the planktonic foraminifera record from the Arctic domain. This polar region records peculiar sea-surface conditions, with the influence of nearly perennial sea-ice cover development. This has strong impact on living foraminifera populations and on the preservation of their shells in the underlying sediments. Copyright Published under licence by IOP Publishing Ltd
Year of Publication: 2011
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 10 Paleontology, Invertebrate; 24 Surficial Geology, Quaternary Geology; Arctic Coring EXpedition; Arctic Ocean; Assemblages; Biogeography; Calcareous composition; Cenozoic; Expedition 302; Foraminifera; Globigerinacea; Ice; Integrated Ocean Drilling Program; Invertebrata; Living taxa; Lomonosov Ridge; Marine sediments; Microfossils; Modern; Morphometry; Neogloboquadrina; Neogloboquadrina pachyderma; Nutrients; Paleo-oceanography; Paleoecology; Planktonic taxa; Preservation; Protista; Quaternary; Rotaliina; SEM data; Salinity; Sea ice; Sea surface water; Sea water; Sea-surface temperature; Sediments; Temperature
Coordinates: N875100 N875600 E1393300 E1361000
Record ID: 2013046609
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data supplied by IOP Publishing Ltd., London, United Kingdom