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Temperature dependence of aragonite and calcite skeleton formation by a scleractinian coral in low mMg/Ca seawater
http://hdl.handle.net/2241/00159836
http://hdl.handle.net/2241/00159836d422ccda-1ef4-4578-955b-0f98db5ec7be
名前 / ファイル | ライセンス | アクション |
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Geology_45-12 (291.5 kB)
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Item type | Journal Article(1) | |||||
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公開日 | 2020-03-26 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Temperature dependence of aragonite and calcite skeleton formation by a scleractinian coral in low mMg/Ca seawater | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
湯山, 育子
× 湯山, 育子× Higuchi, Tomihiko× Shirai, Kotaro× Mezaki, Takuma |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Temperature-dependent aragonite and calcite formation by scleractinian corals were examined in low molar (m) Mg/Ca seawater, the experimental conditions replicating the fluctuating mMg/Ca levels prevailing throughout the Phanerozoic Eon. Incubation and skeletal growth monitoring of juveniles of the scleractinian coral Acropora solitaryensis for 4 months from the planula stage, in seawater with mMg/Ca ratios of 5.2, 1.0, and 0.5, and temperatures of 19–28 °C, indicated that polymorphism of present-day scleractinian corals in low mMg/Ca seawater is also influenced by seawater temperature. However, corals produced more aragonite than formed in inorganic CaCO3 precipitation experiments under the same conditions, except at 19 °C. Although the aragonite content reflected the results of the latter (abiotic) experiments at 19 °C, it is suggested that aragonitic scleractinian corals controlled skeletal formation biologically under low mMg/Ca conditions at higher temperature, growth rates being faster at 25 °C and slower at 19 °C for all mMg/Ca ratios. Compared with growth rates under the present-day-equivalent seawater Mg/Ca level of 5.2, juvenile growth decreased by 62.8% ± 14.7% and 56.7% ± 6.7% under mMg/Ca levels of 1.0 and 0.5, respectively; the results suggest that growth of aragonitic scleractinian corals is suppressed throughout varying seasonal temperatures under low mMg/Ca conditions. This supports previous findings from variable temperature perspectives that scleractinian corals grow more slowly in low mMg/Ca (Cretaceous) seawater, interpreted as a possible explanation for the hiatus in scleractinian reef building in the Cretaceous Period. | |||||
書誌情報 |
en : Geology 巻 45, 号 12, p. 1087-1090, 発行日 2017-10 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0091-7613 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00656697 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1130/G39516.1 | |||||
権利 | ||||||
権利情報 | © 2017 The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license. | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | Geological Society of America |