Dinoflagellate cyst paleoecology during the Pliocene-Pleistocene climatic transition in the North Atlantic

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doi: 10.1016/j.palaeo.2016.12.023
Author(s): Hennissen, Jan A. I.; Head, Martin J.; De Schepper, Stijn; Groeneveld, Jeroen
Author Affiliation(s): Primary:
University of Toronto, Department of Earth Sciences, Toronto, ON, Canada
Bjerknes Center for Climate Research, Bergen, Norway
University of Bremen, Center for Marine Environmental Sciences, Bremen, Germany
Volume Title: Palaeogeography, Palaeoclimatology, Palaeoecology
Source: Palaeogeography, Palaeoclimatology, Palaeoecology, Vol.470, p.81-108. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0031-0182 CODEN: PPPYAB
Note: In English. 100 refs.; illus., incl. 3 plates, 7 tables, sketch map
Summary: Dinoflagellate cysts (dinocysts) are widely used as tracers of sea surface conditions in late Quaternary marine records. However, paleoenvironmental reconstructions across the Pliocene-Pleistocene climatic transition and beyond are limited because the hydrologic conditions influencing assemblage compositions may not have a modern analogue, and the ecological optima of extinct dinocyst species are not well known. From a study of two cored sites in the central and eastern North Atlantic, we bypass these issues by statistically analyzing the variations in dinocyst assemblage composition and comparing the results directly to paleoecological parameters (δ18Obulloides, δ18Osalinity, and geochemical proxies for sea surface temperature [SST]) derived from the planktonic foraminifer Globigerina bulloides recovered from the same samples as the dinocysts. Through canonical correspondence analysis we demonstrate the co-variation of seasonality and dinocyst paleoproductivity. We show that Pyxidinopsis braboi is a cold tolerant species with an optimum SST between 12 and 14 °C. We extend the use of Nematosphaeropsis labyrinthus as an indicator of transitional climatic conditions to the Pliocene, we offer evidence for the correlation of Bitectatodinium tepikiense and Filisphaera microornata to high seasonality, and we reiterate an apparent link between Spiniferites mirabilis and eastern North Atlantic water masses. Finally, we confirm that Habibacysta tectata is cold-tolerant rather than a strictly cold-water indicator, that Operculodinium? eirikianum is a cold-intolerant species favoring outer neritic environments, and that Ataxiodinium confusum and Invertocysta lacrymosa are both warm-water species.
Year of Publication: 2017
Research Program: DSDP Deep Sea Drilling Project
IODP Integrated Ocean Drilling Program
IPOD International Phase of Ocean Drilling
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Atlantic Ocean; Biostratigraphy; Canonical analysis; Cenozoic; Climate change; Coastal environment; Correspondence analysis; DSDP Site 610; Deep Sea Drilling Project; Depositional environment; Detrended correspondence analysis; Dinoflagellata; Estuarine environment; Expedition 306; Expeditions 303/306; Feni Drift; Geostatistics; Glacial environment; IODP Site U1313; IPOD; Integrated Ocean Drilling Program; Isotope ratios; Isotopes; Leg 94; Lower Pleistocene; Marine environment; Mid-Atlantic Ridge; Morphology; Neogene; North Atlantic; O-18/O-16; Oxygen; Paleoclimatology; Paleoecology; Paleoenvironment; Palynomorphs; Pleistocene; Pliocene; Productivity; Quaternary; Rockall Trough; Stable isotopes; Statistical analysis; Stratigraphic boundary; Subtidal environment; Tertiary
Coordinates: N410000 N410000 W0325700 W0325700
N531318 N531329 W0185312 W0185342
Record ID: 2019051303
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands