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Monitoring of coral calcification rate and CO2 concentration at coral reef.

监测珊瑚礁的珊瑚钙化率和二氧化碳浓度。

基本信息

批准号：
03455019
负责人：
OOMORI Tamotsu
金额：
$ 3.39万
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 (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

(1) The most inportant question is whether corals uptake or release CO2 from sea water or from air" In this research Project, caltivation study of hermatypic corals revieled that coral can uptake the carbon dioxide from sea water effectively, awing to the coexistence of xoozanthella in the coral cells.(2) The rate of calcification by coral is controlled by the intensity of light intensity during daytime, which is proportional to that of primary production by zoothanthella. It is suggestited that calcification process and the photosynthesis process are kinked each other in the coral-zoothanthella ecosystems. The ratio of coral calcification rate to that of primary organic production(photosynthesis) is lower than unity(ca. 1/3), which is very important for the coral can uptake CO2 from sea water. Because calcification process itself is considered as CO2 release process,, on the other hand, photosynthesis is a CO2 uptake process.(3) The distribution and variation of CO2 concentration in coral reef was observed. Durnal variaton of CO2 was clearly observed, which is analogous to that of caltivation study. It is suggested that CO2 can also be uptaked by coral living organisms effectively. The remained problem is where the produced organic substances are trasported, deposited and the decomposed. It is generalized that CO2 problems in coral reef is analogous to that of open sea.(4) Monitoring system for CO2 concentration was established. This system can monitor automatically the CO2 variation both in air and in sea water.

(1)最重要的问题是珊瑚是否从海水或空气中吸收或释放CO2”在本研究项目中，造礁石珊瑚的培育研究表明，珊瑚可以有效地从海水中吸收二氧化碳，这与珊瑚细胞中存在的xoozanthella有关。(2)珊瑚的钙化速率受白天光照强度的控制，与虫壳藻的初级生产量成正比。研究表明，在珊瑚-虫藻生态系统中，钙化过程与光合作用过程相互交织。珊瑚的钙化率与初级有机生产力（光合作用）的比值低于1（约100）。1/3），这对珊瑚从海水中吸收二氧化碳非常重要。因为钙化过程本身被认为是CO2释放过程，另一方面，光合作用是CO2吸收过程。(3)观测了珊瑚礁内CO2浓度的分布和变化。CO_2浓度随时间变化明显，与人工栽培研究结果相似。这表明珊瑚生物也可以有效地吸收CO2。剩下的问题是产生的有机物在哪里运输、沉积和分解。珊瑚礁中的CO2问题与公海中的CO2问题是相似的。(4)建立了CO2浓度监测系统。该系统可以自动监测大气和海水中CO2的变化。