权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Carbon cycle in coral reefs and its change with environment

珊瑚礁的碳循环及其随环境的变化

基本信息

批准号：
08041100
负责人：
KAYANNE Hajime
金额：
$ 7.49万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08041100/
关键词：
Coral reef Carbon dioxide Environmental change Coral Australia Palau 炭素循環

项目摘要

Coral reefs are related with global carbon cycles through photosynthesis and calcification. The mode of carbon cycles in reefs have been changed with formation of reef geomorphology accompanying with environmental changes for the last several thousand years. We have made researches on reef geomorphological/biological zonations and production rates, sea water and carbon fluxes across ocean-reef-lagoon system and formation of coral reefs for the last 10,000 years in the Great Barrier Reef and Palau Islands-typical continental and oceanic barrier reef systems. We have obtained the following results : 1) Barrier reef system is divided into the barrier reef flat and lagoon : the barrier reef flat is subdivided into reef front, reef crest, aligned coral pavement and sand flat from sea to ocean with geomorphological features and coral community structure ; 2) These reef zonation can be identified by satellite and aerial remote sensing data ; 3) The barrier reef systems have been formed with the rising sea from 8,000 to 4,000 years ago and reef zonation have been formed with the stabilized sea since 4,000 years ago ; 4) Net organic production 167 mmol C m^<-2> day^<-1>, which exceeds net calcium carbonate production 130 mmol C m^<-2> day^<-1>, exists on barrier reef flat ; 5) Organic products are delivered to outer ocean as dissolved and particulate forms accompanying with tidal currents.

珊瑚礁通过光合作用和钙化与全球碳循环相关。几千年来，随着环境的变化，珊瑚礁地貌的形成，珊瑚礁中的碳循环模式也发生了变化。我们对大堡礁和帕劳群岛这些典型的大陆和海洋堡礁系统的珊瑚礁地貌/生物分区和生产率、整个海洋-珊瑚礁-泻湖系统的海水和碳通量以及过去一万年的珊瑚礁形成进行了研究。我们取得了以下成果： 1）堡礁系统分为堡礁滩和泻湖：根据地貌特征和珊瑚群落结构，堡礁滩从海到洋又细分为礁前、礁顶、排列珊瑚铺面和沙滩； 2）这些珊瑚礁区带可以通过卫星和航空遥感数据来识别； 3）堡礁系统是在8000至4000年前随着海平面上升而形成的，礁带是在4000年前随着海平面稳定而形成的； 4) 堡礁平坦区存在有机净产量 167 mmol C m^<-2> 天^<-1>，超过碳酸钙净产量 130 mmol C m^<-2> 天^<-1>； 5) 有机产品随着潮流以溶解和颗粒形式输送到外海。