Calcareous nannoplankton ecology and community change across the Paleocene-Eocene Thermal Maximum

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doi: 10.1666/12050
Author(s): Schneider, Leah J.; Bralower, Timothy J.; Kump, Lee R.; Patzkowsky, Mark E.
Author Affiliation(s): Primary:
Pennsylvania State University, Department of Geosciences, University Park, PA, United States
Volume Title: Paleobiology
Source: Paleobiology, 39(4), p.628-647. Publisher: Paleontological Society, Lawrence, KS, United States. ISSN: 0094-8373 CODEN: PALBBM
Note: In English. NSF Grant EAR06-28394. 99 refs.; illus., incl. 1 table, sketch map
Summary: The Paleocene-Eocene Thermal Maximum (PETM; ca. 55.8 Ma) is thought to coincide with a profound but entirely transient change among nannoplankton communities throughout the ocean. Here we explore the ecology of nannoplankton during the PETM by using multivariate analyses of a global data set that is based upon the distribution of taxa in time and space. We use these results, coupled with stable isotope data and geochemical modeling, to reinterpret the ecology of key genera. The results of the multivariate analyses suggest that the community was perturbed significantly in coastal and high-latitudes sites compared to the open ocean, and the relative influence of temperature and nutrient availability on the assemblage varies regionally. The open ocean became more stratified and less productive during the PETM and the oligotrophic assemblage responded primarily to changes in nutrient availability. Alternatively, assemblages at the equator and in the Southern Ocean responded to temperature more than to nutrient reduction. In addition, the assemblage change at the PETM was not merely transient--there is evidence of adaptation and a long-term change in the nannoplankton community that persists after the PETM and results in the disappearance of a high-latitude assemblage. The long-term effect on communities caused by transient warming during the PETM has implications for modern-day climate change, suggesting similar permanent changes to nannoplankton community structure as the oceans warm.
Year of Publication: 2013
Research Program: ODP Ocean Drilling Program
Key Words: 09 Paleontology, Paleobotany; Algae; Atlantic Ocean; Cenozoic; Cluster analysis; Communities; Correspondence analysis; Demerara Rise; Equatorial Atlantic; Europe; Floral studies; Italy; Leg 113; Leg 198; Leg 207; Leg 208; Marine environment; Maud Rise; Microfossils; Nannofossils; New Jersey; North Atlantic; North Pacific; Northwest Atlantic; Northwest Pacific; Nutrients; ODP Site 1209; ODP Site 1260; ODP Site 1263; ODP Site 690; Ocean Drilling Program; Pacific Ocean; Paleocene-Eocene Thermal Maximum; Paleoecology; Paleoenvironment; Paleogene; Plantae; Productivity; Shatsky Rise; South Atlantic; Southern Europe; Southern Ocean; Statistical analysis; Tertiary; United States; Walvis Ridge; Weddell Sea; West Atlantic; West Pacific
Coordinates: S650938 S650937 E0011218 E0011218
N323900 N324000 E1583100 E1583000
N091600 N091600 W0543300 W0543300
S283200 S283200 E0024700 E0024700
Record ID: 2013083939
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Abstract, Copyright, The Paleontological Society, Reference includes data from GeoScienceWorld, Alexandria, VA, United States