Taxonomy of the nonarticulated coralline algae in the coral reef environment

珊瑚礁环境中非关节珊瑚藻的分类

• 批准号: 02640613
• 负责人: MATSUDA Shinya
• 金额: $ 1.09万
• 依托单位: University of the Ryukyus
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02640613/
• 关键词: Coralline algae; Rhodolith; Ryukyu Islands; Coral reef; Okinawa-jima; Ishigaki-jima; Island shelf; forereef; サンゴ毛球

The distribution, abundance, and composition of rhodoliths are investigated on the basis of 119 grab samples taken around Okinawa-jima, Ryukyu Islands, covering the deep fore reef to island shelf, which ranges in depths from 50 to 200m. The rhodoliths are found from 70 sites at depths shallower than 135m. Coverage of the rhodoliths is about 75% at its maximum, where about 300 rhodoliths larger than 3cm in diameter occur in 1m^2. These rhodoliths are spheroidal, ellipsoidal or rarely disk-like in shape, 50-10cm in mean diameter, and composed of mainly of thin crustose forms of nonarticulated coralline algae and the encrusting foraminifer Acervulina inhaerens, both of which form more or less concentric or irregular internal structure. Bioerosion is frequent, making the rhodoliths porous. Twenty seven species of the nonarticulated coralline algae have been identified, coming under the genera Spongites, Lithoporella, Lithophyllum, Mesophyllum and Lithothamnion. of these genera, Lithothamnion is the most dominant and diverse, reaching 11 species. The nonarticulated coralline algae grow in common to abundance on the surface of the rhodoliths at depths less than 120m, while A.inhaerens predominates at depths exceeding 120m. The presence of a large quantity of rhodoliths on the deep forereef to island shelf mirrors the on-the-spot production of critical amounts of organic and inorganic carbon.Carbon production of Lithophyllum pallescens, which is luxuriating in the shallow coral reef environment of Ishigaki Island, is mesurerd by alkalinity anomary method. The net organic production / inorganic production ratio of the species is 1/0.9.

对琉球群岛冲绳--吉马一带50~200米深的前礁至岛架119个采样点的红柱石的分布、丰度和组成进行了研究。红柱石是在70个地点发现的，这些地点的深度低于135米。红柱石的最大覆盖率约为75%，其中1m^2约有300个直径大于3 cm的红柱石。这些红柱石呈球形、椭圆形或罕见的盘状，平均直径50-10 cm，主要由薄壳状的非关节珊瑚藻类和包壳的有孔虫组成，两者都形成了或多或少的同心或不规则的内部结构。生物侵蚀频繁，使红柱石变得漏洞百出。共鉴定出非关节珊瑚藻类27种，隶属于海绵藻属、石孔藻属、石叶藻属、中叶藻属和石藻属。在这些属中，石龙属是最具优势和多样性的属，共有11种。非关节珊瑚藻类在低于120米深的赤潮藻表面共同生长，而在超过120米深的赤潮藻中占主导地位。石垣岛浅海珊瑚礁环境中大量红柱石的存在反映了临界量有机碳和无机碳的就地生产，利用碱度异常方法对石垣岛浅海珊瑚礁环境中的石杉碳生产进行了研究。该物种的净有机生产量/无机生产量之比为1/0.9。

项目成果

Matsuda, M.: "Taxonomic and distributional motes on the nonarticulated coralline algae of the Ryukyu Islands" Bull.Coll.Educ., Univ.the Ryukyus. 47(in prep.).

Matsuda, M.：“琉球群岛非关节珊瑚藻的分类学和分布微粒”Bull.Coll.Educ.，琉球大学。

松田伸也: "琉球列島に生育する無節サンゴモに関する新知見" 琉球大学教育学部紀要. 47(予定). (1995)

Shinya Matsuda：“关于琉球群岛生长的无节段珊瑚藻的新知识”，琉球大学教育学院公告47（预定）。

松田 伸也・井龍 康文・野原 昌人: "沖縄島周辺海域のサンゴモ球およびその地質学的意義" 堆積学研究会報. 37. 109-111 (1992)

Shinya Matsuda、Yasufumi Iryu 和 Masato Nohara：“冲绳岛周围海域的珊瑚藻球及其地质意义”沉积学研究公报 37. 109-111 (1992)。

Matsuda, S.Iryu, Y.Nohara, M.: "Rhodoliths on the deep forereef of Okinawa-jima, Ryukyu Islands" Jour.Sed.Soc.Japan. 37. 109-111 (1992)

Matsuda, S.Iryu, Y.Nohara, M.：“琉球群岛冲绳岛前礁深处的红石”Jour.Sed.Soc.Japan。

辻喜弘・中森亨・井龍康文・松田博貴・松田伸也・野原昌人: "琉球列島の現世炭酸塩堆積物" 地質学雑誌. 99. V-V1 (1993)

Yoshihiro Tsuji、Toru Nakamori、Yasufumi Iryu、Hiroki Matsuda、Shinya Matsuda、Masato Nohara：“琉球群岛的现代碳酸盐矿床”地质杂志 99。V-V1 (1993)。