Harmful algae and export production collapse in the equatorial Atlantic during the zenith of Middle Eocene Climatic Optimum warmth

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doi: 10.1130/G45614.1
Author(s): Cramwinckel, Margot J.; van der Ploeg, Robin; Bijl, Peter K.; Peterse, Francien; Bohaty, Steven M.; Röhl, Ursula; Schouten, Stefan; Middelburg, Jack J.; Sluijs, Appy
Author Affiliation(s): Primary:
Utrecht University, Department of Earth Sciences, Utrecht, Netherlands
University of Southampton, United Kingdom
University of Bremen, Germany
Volume Title: Geology (Boulder)
Source: Geology (Boulder), 47(3), p.247-250. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0091-7613 CODEN: GLGYBA
Note: In English. GSA Data Repository item 2019090. 29 refs.; illus., incl. sketch map
Summary: New palynological, sedimentological, and geochemical records spanning the Middle Eocene Climatic Optimum (MECO; ca. 40 Ma) in the equatorial Atlantic Ocean indicate that peak warming was associated with upper-ocean stratification, decreased export production, and possibly harmful algal blooms, followed by slight oxygen minimum zone expansion. Combining these findings with published MECO records suggests that export production collapse and benthos starvation during the zenith of MECO warmth were widespread in the Atlantic. Furthermore, comparison to records across the Paleocene-Eocene thermal maximum (ca. 56 Ma) at the same site suggests a similar system response to warming, but with different impact on benthic communities.
Year of Publication: 2019
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Atlantic Ocean; Biostratigraphy; C-13/C-12; Carbon; Cenozoic; Chemostratigraphy; Climate change; Cores; Dinoflagellata; Eocene; Equatorial Atlantic; Isotope ratios; Isotopes; Leg 159; Marine sediments; Microfossils; Middle Eocene; Middle Eocene Climatic Optimum; North Atlantic; O-18/O-16; ODP Site 959; Ocean Drilling Program; Organic compounds; Oxygen; Paleo-oceanography; Paleoclimatology; Paleogene; Palynomorphs; Productivity; Reconstruction; Sediments; Stable isotopes; Tertiary; Total organic carbon
Coordinates: N033740 N033740 W0024408 W0024408
Record ID: 2019014769
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States, Reference includes data supplied by the Geological Society of America