Abstract
We investigated temperature and growth-rate dependency of skeletal oxygen and carbon isotopes in primary polyps of Acropora digitifera (Scleractinia: Acroporidae) by culturing them at 20, 23, 27, or 31°C. Calcification was most rapid at 27 and 31°C. We obtained a δ18O-temperature relationship (-0.18‰ °C-1) consistent with reported ranges for Porites, indicating that juvenile Acropora polyps can be used for temperature reconstruction. A growth-rate dependency of skeletal isotopes was detected in the experimental polyps cultured at lower water temperatures, when the skeletal growth rate of these polyps was also low. The estimated upper calcification flux limit for a kinetic isotope effect to be observed in the δ18O-growth rate relationship (∼0.4-0.7 g CaCO3 cm-2 yr-1) was similar to the calcification flux in Porites corresponding to a linear extension rate of 5 mm yr-1, the maximum rate at which the kinetic isotope effect is evident. This result suggests that the calcification flux can be used as a measure of growth rate-related isotope fractionation, that is, the kinetic isotope effect, in corals of different genera and at different growth stages.
| Original language | English |
|---|---|
| Pages (from-to) | 2840-2849 |
| Number of pages | 10 |
| Journal | Geochemistry, Geophysics, Geosystems |
| Volume | 15 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2014 |
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Keywords
- Acropora digitifera
- coral
- kinetic isotope effect
- stable isotopes
- temperature experiment
ASJC Scopus subject areas
- Geochemistry and Petrology
- Geophysics
Cite this
Skeletal oxygen and carbon isotope compositions of Acropora coral primary polyps experimentally cultured at different temperatures. / Nishida, Kozue; Ishikawa, Kei; Iguchi, Akira; Tanaka, Yasuaki; Sato, Mizuho; Ishimura, Toyoho; Takeuchi, Mayuri; Nakamura, Takashi; Sakai, Kazuhiko; Suzuki, Atsushi.
In: Geochemistry, Geophysics, Geosystems, Vol. 15, No. 7, 2014, p. 2840-2849.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Skeletal oxygen and carbon isotope compositions of Acropora coral primary polyps experimentally cultured at different temperatures
AU - Nishida, Kozue
AU - Ishikawa, Kei
AU - Iguchi, Akira
AU - Tanaka, Yasuaki
AU - Sato, Mizuho
AU - Ishimura, Toyoho
AU - Takeuchi, Mayuri
AU - Nakamura, Takashi
AU - Sakai, Kazuhiko
AU - Suzuki, Atsushi
PY - 2014
Y1 - 2014
N2 - We investigated temperature and growth-rate dependency of skeletal oxygen and carbon isotopes in primary polyps of Acropora digitifera (Scleractinia: Acroporidae) by culturing them at 20, 23, 27, or 31°C. Calcification was most rapid at 27 and 31°C. We obtained a δ18O-temperature relationship (-0.18‰ °C-1) consistent with reported ranges for Porites, indicating that juvenile Acropora polyps can be used for temperature reconstruction. A growth-rate dependency of skeletal isotopes was detected in the experimental polyps cultured at lower water temperatures, when the skeletal growth rate of these polyps was also low. The estimated upper calcification flux limit for a kinetic isotope effect to be observed in the δ18O-growth rate relationship (∼0.4-0.7 g CaCO3 cm-2 yr-1) was similar to the calcification flux in Porites corresponding to a linear extension rate of 5 mm yr-1, the maximum rate at which the kinetic isotope effect is evident. This result suggests that the calcification flux can be used as a measure of growth rate-related isotope fractionation, that is, the kinetic isotope effect, in corals of different genera and at different growth stages.
AB - We investigated temperature and growth-rate dependency of skeletal oxygen and carbon isotopes in primary polyps of Acropora digitifera (Scleractinia: Acroporidae) by culturing them at 20, 23, 27, or 31°C. Calcification was most rapid at 27 and 31°C. We obtained a δ18O-temperature relationship (-0.18‰ °C-1) consistent with reported ranges for Porites, indicating that juvenile Acropora polyps can be used for temperature reconstruction. A growth-rate dependency of skeletal isotopes was detected in the experimental polyps cultured at lower water temperatures, when the skeletal growth rate of these polyps was also low. The estimated upper calcification flux limit for a kinetic isotope effect to be observed in the δ18O-growth rate relationship (∼0.4-0.7 g CaCO3 cm-2 yr-1) was similar to the calcification flux in Porites corresponding to a linear extension rate of 5 mm yr-1, the maximum rate at which the kinetic isotope effect is evident. This result suggests that the calcification flux can be used as a measure of growth rate-related isotope fractionation, that is, the kinetic isotope effect, in corals of different genera and at different growth stages.
KW - Acropora digitifera
KW - coral
KW - kinetic isotope effect
KW - stable isotopes
KW - temperature experiment
UR - http://www.scopus.com/inward/record.url?scp=84906274560&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84906274560&partnerID=8YFLogxK
U2 - 10.1002/2014GC005322
DO - 10.1002/2014GC005322
M3 - Article
AN - SCOPUS:84906274560
VL - 15
SP - 2840
EP - 2849
JO - Geochemistry, Geophysics, Geosystems
JF - Geochemistry, Geophysics, Geosystems
SN - 1525-2027
IS - 7
ER -