Vital effects and ecologic adaptation of photosymbiont-bearing planktonic Foraminifera during the Paleocene-Eocene Thermal Maximum, implications for paleoclimate

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doi: 10.1002/2017PA003219
Author(s): Si, Weimin; Aubry, Marie-Pierre
Author Affiliation(s): Primary:
Rutgers University, Department of Earth and Planetary Sciences, New Brunswick, NJ, United States
Volume Title: Paleoceanography and Paleoclimatology
Source: Paleoceanography and Paleoclimatology, 33(1), p.112-125. Publisher: John Wiley & Sons, International. ISSN: 1944-9186
Note: In English. 61 refs.; illus., incl. geol. sketch map
Summary: Stable isotope-size data of four major planktonic foraminifera lineages from the Paleocene-Eocene Thermal Maximum (PETM, ∼56 Ma) at two locations (North Atlantic New Jersey shelf and Southern Ocean) are analyzed. By comparing changes in δ13C/δ18O-size correlation prior to and during the PETM, we present evidence of significant changes in vital effects in photosymbiont-bearing planktonic foraminifera during the PETM. The δ13C-size data indicate divergent changes in δ13C vital effects in high-latitude versus mid-latitude populations, due likely to different responses in photosymbiotic activities. Combined δ18O-size data and isotopic ranking indicates that some surface dwellers experienced changes that may be interpreted as depth migrations. Extreme temperatures (>32°C) may have exerted selective pressure and drove depth migrations. Species with flexible depth distribution were capable of adapting to rapid warming by vertical migration in the upper ocean, while populations restricted to near-surface ocean may have undergone temporal and/or regional collapse during the peak warming. From a paleo-proxy perspective, these biologic responses have the potential to obscure paleoceanographic signatures both regionally and globally. Abstract Copyright (2018), American Geophysical Union. All Rights Reserved.
Year of Publication: 2018
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Acarinina; Adaptation; Atlantic Coastal Plain; Bass River; Bass River Site; Burlington County New Jersey; C-13/C-12; Carbon; Cenozoic; Cumberland County New Jersey; Foraminifera; Gloucester County New Jersey; Isotope ratios; Isotopes; Leg 113; Leg 174AX; Marine environment; Maud Rise; Microfossils; Millville New Jersey; Millville Site; Morozovella; New Jersey; O-18/O-16; ODP Site 689; ODP Site 690; Ocean Drilling Program; Oxygen; Paleo-oceanography; Paleocene-Eocene Thermal Maximum; Paleoclimatology; Paleoecology; Paleoenvironment; Paleogene; Paleotemperature; Phylogeny; Planktonic taxa; Southern Ocean; Stable isotopes; Subbotina; Symbiosis; Tertiary; United States; Weddell Sea; Wilson Lake; Wilson Lake Site
Coordinates: N392417 N393935 W0742610 W0750520
S643101 S643100 E0030600 E0030559
S650938 S650937 E0011218 E0011218
Record ID: 2019077894
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom