Faculty Profiles - INOUE Mayuri

Coral calcification and its response to global environmental changes

SUZUKI Atsushi, INOUE Mayuri, Atsushi Suzuki, Mayuri Inoue, Atmosphere and Ocean Research Institute The University of Tokyo

Oceanography in Japan 21 ( 5 ) 177 - 188 2012.9

Language：Japanese Publisher：The Oceanographic Society of Japan

Calcification mechanism of reef-building corals and its response to global environmental changes are reviewed based on the recently published literature. Coral calcification is an extracellular reaction occurred in subcalicoblastic extracellular calcifying medium. To maintain progress of calcification, calcium ions and dissolved inorganic carbon species are needed to be supplied in the calcifying medium while calcification inhibitors such as protons should be removed efficiently. Catalytic reaction of carbonic anhydrase in calicoblastic endoderm layers seems to play important role for fast calcification of corals. Better understanding on coral calcification is essential to evaluate on-going ocean acidification impact on reef calcification. More integrated research strategy is required including physiology, skeletal geochemistry, and molecular biology.

DOI： 10.5928/kaiyou.21.5_177

A review of the influence of ocean acidification on marine organisms in coral reefs

Changes of global environments and reef building corals (Reprint)

INOUE Mayuri, M. Inoue

Oceanography in Japan 21 ( 5 ) 145 - 146 2012.9

SUWA Ryota, NAKAMURA Takashi, IGUCHI Akira, NAKAMURA Masako, MORITA Masaya, KATO Aki, FUJITA Kazuhiko, INOUE Mayuri, SAKAI Kazuhiko, SUZUKI Atsushi, KOIKE Isao, SIRAYAMA Yoshihisa, NOJIRI Yukihiro, Ryota Suwa, Takashi Nakamura, Akira Iguchi, Masako Nakamura, Masaya Morita, Aki Kato, Kazuhiko Fujita, Mayuri Inoue, Kazuhiko Sakai, Atsushi Suzuki, Isao Koike, Yoshihisa Sirayama, Yukihiro Nojiri, Seto Marine Biological Laboratory Field Science Education and Research Center Kyoto University, Amakusa Marine Laboratory Kyusyu University, Sesoko Station Tropical Biosphere Research Center University of the Ryukyus, Sesoko Station Tropical Biosphere Research Center University of the Ryukyus, Sesoko Station Tropical Biosphere Research Center University of the Ryukyus, Graduate School of Engineering and Science University of the Ryukyus, Graduate School of Engineering and Science University of the Ryukyus, Ocean Research Institute The University of Tokyo, Sesoko Station Tropical Biosphere Research Center University of the Ryukyus, Geological Survey of Japan National Institute of Advanced Industrial Science and Technology(AIST), Seto Marine Biological Laboratory Field Science Education and Research Center Kyoto University, Center for Global Environmental Research National Institute for Environmental Studies

Oceanography in Japan 19 ( 1 ) 21 - 40 2010.1

Variation of trace elements in coral skeleton based on culture experiments

Chikyu Monthly ( 59 ) 12 - 17 2008

Oxygen and carbon isotope ratios of hermatypic corals

Chishitsu news ( 632 ) 23 - 28 2007.4

Re-evaluation of Sr/Ca ratio in coral skeletons as a proxy for temperature

INOUE Mayuri

Chikyukagaku 40 ( 3 ) 209 - 219 2006

Language：Japanese Publisher：The Geochemical Society of Japan

Components in biogenic carbonates have been recognized to be attractive tools for reconstructing past oceanographic and climatic changes. Although chemical components in coral aragonite are precipitated away from equilibrium, fluctuations of Sr/Ca ratio in coral skeletons have been empirically considered to be controlled by temperature. Thus, Sr/Ca ratio in coral skeletons has been applied for paleoclimate reconstruction. Recently, coupled measurements of coral skeletal δ18O, indicator of both SST and seawater δ18O, and Sr/Ca ratio are used to reconstruct seawater salinity as well as SST. On the other hand, it has been reported that Sr/Ca is also affected by growth rate of coral skeleton besides SST. However, the impact of skeletal growth rate on Sr/Ca ratio is a matter of debate and controversial results have been reported at the present. In this review, recent progress of studies on the topics and a mechanism of growth rate-related Sr/Ca variation based on a physiological model are summarized.

DOI： 10.14934/chikyukagaku.40.209

危険化学物質による環境汚染(その3)ミクロネシア連邦ポンペイ島における船底塗料による海洋汚染の歴史的変遷--サンゴ骨格中の銅とスズを指標として

鈴木淳, 井上麻夕里, 野原昌人

地質ニュース ( 604 ) 8 - 14 2004.12

危険化学物質による環境汚染(その2)琉球列島サンゴ礁および隣接地域の外因性内分泌攪乱物質(環境ホルモン)ノニルフェノールとビスフェノールAの汚染

川幡穂高, 井上麻夕里, 北田幸男

地質ニュース ( 603 ) 20 - 24 2004.11

Collaborative analysis of GSJ/AIST geochemical reference materials JCp-1 (Coral) and JCt-1 (Giant Clam)

OKAI Takashi, SUZUKI Atsushi, TERASHIMA Shigeru, INOUE Mayuri, NOHARA Masato, KAWAHATA Hodaka, IMAI Noboru

Chikyukagaku 38 ( 4 ) 281 - 286 2004

Language：Japanese Publisher：The Geochemical Society of Japan

The chemical composition of coral skeleton and clamshell is closely linked to the composition of surface sea water in which skeletal or shell calcium carbonate is precipitated. For this reason, several chemical components in coral and clam have been determined to be indicatrs of sea surface environmental conditions. However, there is no reference material having the same chemical composition as coral or clam. Therefore, GSJ/AIST has issued the reference materials JCp-1 (Coral Porites sp.) and JCt-1 (Giant Clam Tridacna), for the determination and evaluation of elements in coral, clam and other biogenic carbonates. In this study, collaborative analysis for the certification of reference materials JCp-1 and JCt-1 was carried out in ten laboratories. The analytical data were compiled for 9 components (CaO, Ba, Fe, K, Mg, Mn, Na, P and Sr). The ICP-AES and AAS were mainly used, and the analytical results agreed relatively well. In the statistical analysis, the reference values were mainly decided using the robust method. ISO typically recommends that data should be submitted from no fewer than 15 laboratories for deciding the certified values; the reference values given in this paper could be considered as preliminary certified values.

DOI： 10.14934/chikyukagaku.38.281

Relationship between sediments and water turbidity in coral reefs around Ishigaki Island, the Ryukyus

Tottori K., Suzuki A., Nagao M., Morimoto N., Inoue M., Iwase A., Shibuno T., Fujioka Y., Ohba H., Kan H.

Journal of the Japanese Coral Reef Society 2004 ( 6 ) 1 - 19 2004

Publisher：The Japanese Coral Reef Society

The distributions of sediments and its relation to reef water turbidities were investigated in three fringing reefs along the east coast of Ishigaki Island and a patch reef named “Shimobishi” in the lagoon of Sekisei Reef. In order to quantify fine particles in sediments, we employed “SPSS (content of suspended particles in sea sediments)” method, which was originally proposed by Ohmija (1987) for quick assessment of land-derived soil distribution in reef sediments. We found highest SPSS values in a moat and channel bottom of the Miyara Bay and along the northern coast of the Todoroki River mouth in Ishigaki Island. In contrast, SPSS values were low in other three reefs including Yasurazaki, Shiraho and Shimobishi areas. Reef water turbidities showed significant correlation with SPSS values, which suggests that the major cause of reef water turbidities is resuspension of fine particles in the sediments. Accuracy and precision of the measurements can be increased by using a portable turbidimeter in the original SPSS method. The modified method has the potential for applying to a study of under-water light environment, which may influence coral-algal competitions in degrading reef conditions.

DOI： 10.3755/jcrs.2004.1

サンゴ骨格を用いた古海洋環境の復元 (特集環境を記録する生物(1))

井上麻夕里

地質ニュース ( 575 ) 26 - 33 2002.7

Heavy Metals in Coral Skeleton as Proxies for Marine Pollution

INOUE Mayuri, SUZUKI Atsushi, KAN Hironobu

Bulletin of the Society of Sea Water Science, Japan 56 ( 2 ) 113 - 117 2002

Trace elements in coral skeleton –Potential proxies for marine pollution–

INOUE Mayuri, KAN Hironobu, SUZUKI Atsushi

Chikyukagaku 36 ( 2 ) 65 - 79 2002

Language：Japanese Publisher：The Geochemical Society of Japan

Coral reefs are increasingly threatened by human activities (e.g., sewage discharge and industrial effluents). Composition of coral skeleton is expected to quantitatively record the change in marine environments in which skeletal calcium carbonate is precipitated. Recently, trace elements, particularly heavy metals, in the skeleton of massive and annually banded corals have been successfully used as a proxy of marine pollution at regional and local scale. Critical problems, however, exist due to lack of a well-established method for analyzing trace elements in coral skeleton. Large range in reported values for heavy metal concentrations in coral skeleton could be attributed to differences in pretreatment procedures of skeletal materials rather than the real extent of marine pollution. In this review, we summarize recent progress of studies on the topics and key factors for the further application of coral proxies in order to reconstruct the history of marine pollution.

DOI： 10.14934/chikyukagaku.36.65