Cited by 59Paleontology and Stratigraphy of FossilsGeology and Paleoclimatology ResearchEvolution and Paleontology Studies

The DOI matches its Crossref record; 29 of the 29 references it cites were found in a registry or an index.

Limited range of interspecific vital effects in coccolith stable isotopic records during the Paleocene‐Eocene thermal maximum

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Stoll, Heather M.·2005·Paleoceanography

Abstract

Small but significant differences exist among stable carbon and oxygen isotopic excursions measured in coccolith‐dominated bulk carbonate and planktic foraminifera during the Paleocene‐Eocene thermal maximum (PETM). One hypothesis suggests that the bulk carbonate isotopic record is compromised by changing nannofossil assemblages, since modern nannofossils show a large (5 permil) range of interspecific vital effects. New techniques are employed here to separate different size fractions of coccoliths from PETM sediments at ODP Site 690 for isotopic analysis, removing a major portion of the variation in nannofossil assemblages. Isotopic compositions of coarse and fine coccolith fractions dominated by coccoliths of genus Chiasmolithus and Toweius, respectively, differ by less than 0.5 permil for both oxygen and carbon. The near‐monogeneric Toweius record closely parallels the main trends in the bulk carbonate isotope records, including multiple steps in the negative carbon isotopic excursion, suggesting that the trends in the bulk carbonate record are not artifacts of changing species assemblages. Because both coccolithophorids and symbiont‐bearing foraminifera like Acarinina must inhabit the photic zone, it is unlikely that the 10 3 year lags in isotope event onset between coccoliths and Acarinina reflect true time‐transgressive invasion of isotopically depleted CO 2 into the water column. The small range of vital effects among Paleocene coccoliths is unlikely to result from diagenetic homogenization, and instead may reflect more similar carbon acquisition strategies of Paleocene coccolithophorid algae due to larger and/or more similar cell sizes and higher atmospheric carbon dioxide. The small range of vital effects suggests that bulk carbonate records are likely reliable for other early and pre‐Cenozoic sediments where foraminifera are often scarce.

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  • Non-equilibrium oxygen-18 effects in coccolithophores have varied drastically at geologic time scales.

    “the observation that non-equilibrium oxygen-18 effects in coccolithophores have varied drastically at geologic time scales22,57 offers a cautionary tale regarding the long-term applicability of modern calibrations for biogenic carbonates.”

    From Most Earth-surface calcites precipitate out of isotopic equilibrium (2019) · cites this paper as [57]

    The Introduction (§1, ¶2) reports a nearly 5‰ range of oxygen-isotope vital effects in cultured modern coccoliths, while the Abstract reports less than 0.5‰ difference between the Paleocene coccolith fractions studied. The discussion (§4.4, ¶32) says these samples suggest a smaller range of vital effects in Paleocene species than in modern ones. That supports a substantial difference across geologic time, but the claim states broad, drastic variation as an established fact rather than the paper’s more limited inference from sampled species. (LLM, conf=0.83)

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Research works printed but not linked: 2

  1. 10.1130/0091-7613(2000)28<927:NCFTLP>2.0.CO;2 · DOI
  2. Shimizu N. andH. M.Stoll(2004) Coccolith Sr/Ca ratios by ion probe analysis paper presented atEleventh International M. Goldschmidt Conference Goldschmidt Geochem. Soc. Copenhagen Denmark.

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Metadata

Authors
Stoll, H. M.
Affiliations
Williams College (US)
Corresponding author
Stoll, Heather M.
Venue
Paleoceanography
Published
2005-02-05
Volume
20
Issue
1
ISSN
  • 0883-8305 (ISSN-L)
  • 1944-9186
OpenAlex
W1592067263
Cited by
59
References
29
Citations by year
2026: 1 · 2025: 1 · 2023: 1 · 2020: 2 · 2019: 5 · 2018: 4 · 2017: 3 · 2016: 2 · 2015: 4 · 2014: 9 · 2013: 2 · 2012: 3
FWCI
4.00
Type
journal article
Language
en
Open access
Locations
Paleoceanography (publishedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
Keywords
Paleocene-Eocene Thermal Maximum, coccoliths, stable carbon isotopes, stable oxygen isotopes, nannofossil assemblages, coccolithophores, Acarinina, planktonic foraminifera, carbon isotope excursion

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