globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2017.03.016
论文题名:
Temperature-controlled culture experiments with primary polyps of coral Acropora digitifera: Calcification rate variations and skeletal Sr/Ca, Mg/Ca, and Na/Ca ratios
作者: Bell T.; Nishida K.; Ishikawa K.; Suzuki A.; Nakamura T.; Sakai K.; Ohno Y.; Iguchi A.; Yokoyama Y.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 484
起始页码: 129
结束页码: 135
语种: 英语
英文关键词: Acropora digitifera ; Coral ; Culture experiment ; Primary polyp ; Temperature proxy ; Trace element
英文摘要: Coral skeletons preserve useful archival indicators from which to reconstruct past environments. We conducted temperature-controlled culture experiments (20, 22, 27, and 31 °C) with primary polyps of Acropora digitifera to accurately assess the impact of a wide range of temperatures on the calcification rate and to methodically evaluate the skeletal trace elements (Sr/Ca, Mg/Ca, and Na/Ca ratios). Water temperatures positively affected the calcification rate up to 31 °C, which exceeds the temperature threshold for this species. The calcification rates also varied widely (> 20%) during each of the four temperature treatments. The skeletal Sr/Ca ratio was most strongly correlated with water temperature (R2 = 0.68, p < 0.001), whereas the Mg/Ca and Na/Ca ratios showed lower correlations (R2 = 0.53, p < 0.001; R2 = 0.34, p = 0.011, respectively). The variations in the skeletal Sr/Ca, Mg/Ca, and Na/Ca ratios at the four different temperatures were 0.36%–1.20%, 0.83%–3.76%, and 0.52%–3.24%, respectively. Thus, the Sr/Ca ratio showed the least variation, despite the wide variations in the calcification rate. We confirm that the Sr/Ca ratio of A. digitifera juveniles is a robust proxy of temperature, regardless of variations in the calcification rate and the wide range of ambient temperatures. In addition, our results regarding skeletal Mg/Ca and Na/Ca ratios further our understanding of coral calcification processes. © 2017 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67767
Appears in Collections:过去全球变化的重建

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作者单位: Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, Japan; Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, Japan; National Institute of Technology, Ibaraki College, 866 Nakane, Hitachinaka, Ibaraki, Japan; Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki, Japan; Department of Chemistry, Biology and Marine Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa, Japan; Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, 3422 Sesoko, Motobu, Okinawa, Japan; Department of Bioresources Engineering, National Institute of Technology, Okinawa College, 905 Henoko, Nago, Okinawa, Japan

Recommended Citation:
Bell T.,Nishida K.,Ishikawa K.,et al. Temperature-controlled culture experiments with primary polyps of coral Acropora digitifera: Calcification rate variations and skeletal Sr/Ca, Mg/Ca, and Na/Ca ratios[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,484
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