Effects of Global Change on Carbonate System in the Seas Surrounding Taiwan in the Western North Pacific: a Case Study in the Dongsha Atoll

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基本資料

Project title

Code/計畫編號

MOST104-2611-M019-018-MY3

Translated Name/計畫中文名

全球變遷對西北太平洋臺灣海域海洋生物地球化學與生態系統影響之長期觀測與研究(Ⅱ)-子計畫：全球變遷因子對東海及西北太平洋黑潮海域碳酸鹽系統變動之影響:以東沙環礁為例

Project Coordinator/計畫主持人

Wen-Chen Chou

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Institute of Marine Environment and Ecology

Website

https://www.grb.gov.tw/search/planDetail?id=12027983

Year

2017

Start date/計畫起

01-08-2017

Expected Completion/計畫迄

01-07-2018

Bugetid/研究經費

1830千元

ResearchField/研究領域

海洋科學

本計畫是「全球變遷對西北太平洋臺灣海域海洋生物地球化學與生態系統影響之長期觀測與研究II」整合計畫子計畫之一。第一期計畫執行中，本子計畫發現優養化現象不僅改變了東海對大氣二氧化吸收能力的季節分布型態，同時亦發現在優養化與大氣二氧化碳濃度增加的雙重影響下，會加速夏季時東海陸棚底水的酸化速度，使其在本世紀末之前即可能轉變為碳酸鈣不飽和的狀態，勢將對東海的底棲生態造成嚴重的影響。本期計畫除將持續前期計畫中對東海碳化學系統的長期觀測外，亦將對東沙環礁海水的碳化學特性進行完整的調查與分析。擬探討之研究課題有五：（1）東沙環礁是大氣二氧化碳的源還是匯？（2）東沙環礁pH值和碳酸鈣飽和度之時空變化及其控制機制；（3）東沙環礁珊瑚覆蓋率空間變異，是否與海水碳酸鈣飽和度的差異有關？（4）模擬大氣CO2 濃度持續增加，東沙環礁海水pH值和碳酸鈣飽和度未來可能的變化趨勢；（5）海水碳酸鈣飽和度之空間變異，是否與海草床之分布有關，並探討海草床存在有助於珊瑚抵抗海洋酸化的假說。 The ocean has absorbed about one-fourth to one-third of anthropogenic CO2 emission since the onset of industrial revolution, which has resulted in a continuous reduction of seawater pH. This process is referred to as ocean acidification (OA). It is known that OA can also reduce the saturation states of carbonate minerals of seawater, which would reduce calcification rate and thus potentially have a negative impact on coral reef. The Dongsha Atoll, located in northwest part of the South China Sea, is far from the anthropogenic influence, so that it is an ideal site to study the impact of OA on coral reef system. As a sub-proposal of the integrated program of ECOBEST (Effects of Global Change on Ocean Biogeochemistry and Ecosystems in the Seas surrounding Taiwan in the Northwest Pacific), we have thoroughly studied the impacts of eutrophicatio on the carbon cycle of the East China Sea during the first phase (2012-2015). In the second phase of ECOBEST (2015-2018), besides the long-term observation in the ECS, we propose to investigate the temporal and spatial variations of seawater carbon chemistry parameters in the Dongsha Atoll. The main objectives of this project include: (1) to elucidate that the Dongsha Atoll acts as a source or sink of the atmospheric CO2 on both seasonal and annual scales? (2) to examine the relationship between coral reef coverage and the saturation states of carbonate minerals of seawater; (3) to predict the future changes in seawater pH and saturation states of calcium carbonate in response to the continuing rising of atmospheric CO2; (4) to explore the influence of sea grass on seawater pH and saturation states of carbonate minerals; and (5) to identify the potential OA refugia in the Dongsha Atoll.

Keyword(s)

海洋酸化
珊瑚礁
海草床
東沙環礁
ocean acidification
Dongsha Atoll
coral reef
sea grass

DSpace CRIS

Effects of Global Change on Carbonate System in the Seas Surrounding Taiwan in the Western North Pacific: a Case Study in the Dongsha Atoll

基本資料

Description