Stable Isotopic Composition of Coccoliths

Walter C. Dudley; Patricia Blackwelder; Larry Brand; J. C. Duplessy

doi:10.1016/0377-8398(86)90021-6

Stable Isotopic Composition of Coccoliths

Walter C. Dudley
, Patricia Blackwelder
, Larry Brand
, J. C. Duplessy

Research output: Contribution to journal › Article › peer-review

Abstract

Oxygen isotope analyses of coccoliths from eight coccolithophore species grown in laboratory culture indicate that biological fractionation occurs during the formation of calcium carbonate. Cultures of coccolithophores, including species not previously grown in the laboratory were maintained at various temperatures ranging from 12–28°C. Over this range of temperature, oxygen isotope values for Emiliania huxleyi, Gephyrocapsa oceanica , and Crenalithus sessilis are found to be 1‰ enriched in ¹⁸ O relative to calcium carbonate precipitated under equilibrium conditions. Coccoliths of Calcidiscus leptoporus, Umbilicosphaera sibogae, U. hulburtiana, Syracosphaera pulchra , and Cricosphaera carterae were found to be 2.5‰ depleted in ¹⁸ O relative to equilibrium. These findings help clarify previously reported equivocal oxygen isotope data derived from sedimentary calcareous nannofossils and reveal the importance of species-specific isotopic fractionation.

Original language	American English
Journal	Marine Micropaleontology
Volume	10
DOIs	https://doi.org/10.1016/0377-8398(86)90021-6
State	Published - Mar 1 1986

Disciplines

Marine Biology
Oceanography and Atmospheric Sciences and Meteorology

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title = "Stable Isotopic Composition of Coccoliths",

abstract = " Oxygen isotope analyses of coccoliths from eight coccolithophore species grown in laboratory culture indicate that biological fractionation occurs during the formation of calcium carbonate. Cultures of coccolithophores, including species not previously grown in the laboratory were maintained at various temperatures ranging from 12–28°C. Over this range of temperature, oxygen isotope values for Emiliania huxleyi, Gephyrocapsa oceanica , and Crenalithus sessilis are found to be 1‰ enriched in 18 O relative to calcium carbonate precipitated under equilibrium conditions. Coccoliths of Calcidiscus leptoporus, Umbilicosphaera sibogae, U. hulburtiana, Syracosphaera pulchra , and Cricosphaera carterae were found to be 2.5‰ depleted in 18 O relative to equilibrium. These findings help clarify previously reported equivocal oxygen isotope data derived from sedimentary calcareous nannofossils and reveal the importance of species-specific isotopic fractionation.",

author = "Dudley, \{Walter C.\} and Patricia Blackwelder and Larry Brand and Duplessy, \{J. C.\}",

year = "1986",

month = mar,

day = "1",

doi = "10.1016/0377-8398(86)90021-6",

language = "American English",

volume = "10",

journal = "Marine Micropaleontology",

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TY - JOUR

T1 - Stable Isotopic Composition of Coccoliths

AU - Dudley, Walter C.

AU - Blackwelder, Patricia

AU - Brand, Larry

AU - Duplessy, J. C.

PY - 1986/3/1

Y1 - 1986/3/1

N2 - Oxygen isotope analyses of coccoliths from eight coccolithophore species grown in laboratory culture indicate that biological fractionation occurs during the formation of calcium carbonate. Cultures of coccolithophores, including species not previously grown in the laboratory were maintained at various temperatures ranging from 12–28°C. Over this range of temperature, oxygen isotope values for Emiliania huxleyi, Gephyrocapsa oceanica , and Crenalithus sessilis are found to be 1‰ enriched in 18 O relative to calcium carbonate precipitated under equilibrium conditions. Coccoliths of Calcidiscus leptoporus, Umbilicosphaera sibogae, U. hulburtiana, Syracosphaera pulchra , and Cricosphaera carterae were found to be 2.5‰ depleted in 18 O relative to equilibrium. These findings help clarify previously reported equivocal oxygen isotope data derived from sedimentary calcareous nannofossils and reveal the importance of species-specific isotopic fractionation.

AB - Oxygen isotope analyses of coccoliths from eight coccolithophore species grown in laboratory culture indicate that biological fractionation occurs during the formation of calcium carbonate. Cultures of coccolithophores, including species not previously grown in the laboratory were maintained at various temperatures ranging from 12–28°C. Over this range of temperature, oxygen isotope values for Emiliania huxleyi, Gephyrocapsa oceanica , and Crenalithus sessilis are found to be 1‰ enriched in 18 O relative to calcium carbonate precipitated under equilibrium conditions. Coccoliths of Calcidiscus leptoporus, Umbilicosphaera sibogae, U. hulburtiana, Syracosphaera pulchra , and Cricosphaera carterae were found to be 2.5‰ depleted in 18 O relative to equilibrium. These findings help clarify previously reported equivocal oxygen isotope data derived from sedimentary calcareous nannofossils and reveal the importance of species-specific isotopic fractionation.

UR - https://nsuworks.nova.edu/occ_facarticles/838

U2 - 10.1016/0377-8398(86)90021-6

DO - 10.1016/0377-8398(86)90021-6

M3 - Article

SN - 0377-8398

VL - 10

JO - Marine Micropaleontology

JF - Marine Micropaleontology

ER -

Stable Isotopic Composition of Coccoliths

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