Calcium isotope fractionation in modern scleractinian corals

Florian Böhm; Nikolaus Gussone; Anton Eisenhauer; Wolf Christian Dullo; Stéphanie Reynaud; Adina Paytan

doi:10.1016/j.gca.2006.06.1546

Calcium isotope fractionation in modern scleractinian corals

Florian Böhm
, Nikolaus Gussone
, Anton Eisenhauer
, Wolf Christian Dullo
, Stéphanie Reynaud
, Adina Paytan

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

131 Scopus citations

Abstract

The ⁴⁴Ca/⁴⁰Ca ratios of cultured (Acropora sp.) and open ocean (Pavona clavus, Porites sp.) tropical reef corals are positively correlated with growth temperature. The slope of the temperature-fractionation relation is similar to inorganic aragonite precipitates. However, δ^44/40Ca of the coral aragonite is offset from inorganic and sclerosponge aragonite by about +0.5‰. This offset can neither be explained by the very fast, biologically controlled calcification of scleractinian corals, nor as a consequence of calcification from a partly closed volume of fluid. As corals actively transport calcium through several cell layers to the site of calcification, the most likely explanation for the offset is a biologically induced fractionation. Our results indicate a limited use of Ca isotopes in scleractinian corals as temperature proxy.

Original language	English
Pages (from-to)	4452-4462
Number of pages	11
Journal	Geochimica et Cosmochimica Acta
Volume	70
Issue number	17
DOIs	https://doi.org/10.1016/j.gca.2006.06.1546
State	Published - 1 Sep 2006
Externally published	Yes

ASJC Scopus subject areas

Geochemistry and Petrology

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10.1016/j.gca.2006.06.1546

Cite this

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title = "Calcium isotope fractionation in modern scleractinian corals",

abstract = "The 44Ca/40Ca ratios of cultured (Acropora sp.) and open ocean (Pavona clavus, Porites sp.) tropical reef corals are positively correlated with growth temperature. The slope of the temperature-fractionation relation is similar to inorganic aragonite precipitates. However, δ44/40Ca of the coral aragonite is offset from inorganic and sclerosponge aragonite by about +0.5‰. This offset can neither be explained by the very fast, biologically controlled calcification of scleractinian corals, nor as a consequence of calcification from a partly closed volume of fluid. As corals actively transport calcium through several cell layers to the site of calcification, the most likely explanation for the offset is a biologically induced fractionation. Our results indicate a limited use of Ca isotopes in scleractinian corals as temperature proxy.",

author = "Florian B{\"o}hm and Nikolaus Gussone and Anton Eisenhauer and Dullo, \{Wolf Christian\} and St{\'e}phanie Reynaud and Adina Paytan",

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TY - JOUR

T1 - Calcium isotope fractionation in modern scleractinian corals

AU - Böhm, Florian

AU - Gussone, Nikolaus

AU - Eisenhauer, Anton

AU - Dullo, Wolf Christian

AU - Reynaud, Stéphanie

AU - Paytan, Adina

PY - 2006/9/1

Y1 - 2006/9/1

N2 - The 44Ca/40Ca ratios of cultured (Acropora sp.) and open ocean (Pavona clavus, Porites sp.) tropical reef corals are positively correlated with growth temperature. The slope of the temperature-fractionation relation is similar to inorganic aragonite precipitates. However, δ44/40Ca of the coral aragonite is offset from inorganic and sclerosponge aragonite by about +0.5‰. This offset can neither be explained by the very fast, biologically controlled calcification of scleractinian corals, nor as a consequence of calcification from a partly closed volume of fluid. As corals actively transport calcium through several cell layers to the site of calcification, the most likely explanation for the offset is a biologically induced fractionation. Our results indicate a limited use of Ca isotopes in scleractinian corals as temperature proxy.

AB - The 44Ca/40Ca ratios of cultured (Acropora sp.) and open ocean (Pavona clavus, Porites sp.) tropical reef corals are positively correlated with growth temperature. The slope of the temperature-fractionation relation is similar to inorganic aragonite precipitates. However, δ44/40Ca of the coral aragonite is offset from inorganic and sclerosponge aragonite by about +0.5‰. This offset can neither be explained by the very fast, biologically controlled calcification of scleractinian corals, nor as a consequence of calcification from a partly closed volume of fluid. As corals actively transport calcium through several cell layers to the site of calcification, the most likely explanation for the offset is a biologically induced fractionation. Our results indicate a limited use of Ca isotopes in scleractinian corals as temperature proxy.

UR - https://www.scopus.com/pages/publications/33747770251

U2 - 10.1016/j.gca.2006.06.1546

DO - 10.1016/j.gca.2006.06.1546

M3 - Article

AN - SCOPUS:33747770251

SN - 0016-7037

VL - 70

SP - 4452

EP - 4462

JO - Geochimica et Cosmochimica Acta

JF - Geochimica et Cosmochimica Acta

IS - 17

ER -

Calcium isotope fractionation in modern scleractinian corals

Abstract

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