Temporal Variability of Carbon Chemistry and Its Controlling Mechanism in Seagrass Meadows at the Dongsha Island(III)

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基本資料

Project title

Code/計畫編號

MOST107-2611-M019-001-MY3

Translated Name/計畫中文名

東沙海草床碳化學的時序變化及其控制機制(III)

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=13325320

Year

2020

Start date/計畫起

01-08-2020

Expected Completion/計畫迄

31-07-2021

Bugetid/研究經費

2115千元

ResearchField/研究領域

海洋科學

由於海草生態系擁有很高的基礎生產力，因此被認為具有幫助吸收大氣二氧化碳及減緩海洋酸化等生態服務功能。然而，過去對海草床碳循環的研究，主要都著重在沉積物的含碳量以及有機物的埋藏速率等課題上，對於其水體中碳化學的研究相對稀少。因此，本計畫擬針對東沙海草床水體二氧化碳系統變化的動力過程進行研究，所擬定之研究議題包含下列三項：（1）了解東沙海草床二氧化碳系統的時空變異特徵及其控制機制；（2）了解海草床沉積物間隙水碳化學的特性；（3）了解海草床沉積物與底水介面鹼度與溶解態無機碳的輸出通量，及其對海水吸收大氣二氧化碳能力及緩衝能力的影響。預期本研究的結果不僅可精確量化東沙海草床對大氣二氧化碳的吸收能力及減緩海水酸化的潛力，亦有助於評估海草床作為保育東沙珊瑚礁生態工具的可行性。此外，由於全球海草床碳化學的觀測數據十分稀少，本研究的結果預期可成為全球研究海草床二氧化碳系統動力過程重要的參考依據。 Recent studies have suggested that due to the high productivity, seagrass meadows may provide an environment beneficial for uptaking atmospheric CO2 and serve as chemical “refugia” for the associated coral reefs facing future ocean acidification. However, most of the research efforts on quantifying the capacity of seagrass meadows to act as carbon sinks have focused on the particulate organic carbon stocks and accumulation rates with very limited direct observation on the carbon chemistry. Therefore, in this project, we propose to study the CO2 dynamics in the seagrass meadows of Dongsha Island to better quantify their role in CO2 sequestration and buffering capacity. The main objectives of this project include: (1) to elucidate the temporal and spatial variations of seawater carbon chemistry parameters in seagrass meadows of Dongsha Island as well as their controlling mechanism; (2) to explore the carbon chemistry of the pore waters in the seagrass meadows; (3) to quantify the benthic fluxes of total alkalinity and dissolved inorganic carbon in the seagrass meadows. The results from this study are expected to not only can provide an accurate estimation on the capacity of atmospheric CO2 uptake for the seagrass meadows, but also can be used to evaluate the potential of conserving and restoring seagrass meadows in serving as chemical “refugia” to alleviate ocean acidification.

Keyword(s)

海草床
東沙環礁
二氧化碳
海洋酸化
seagrass meadow
Dongsha Atoll
carbon dioxide
ocean acidification

DSpace CRIS

Temporal Variability of Carbon Chemistry and Its Controlling Mechanism in Seagrass Meadows at the Dongsha Island(III)

基本資料

Description