干旱区生态环境知识资源中心(Arid): Planktonic carbon metabolism of an underwater coral atoll in the oligotrophic sea: a case study of Zhongsha Atoll, Central South China Sea

Arid

DOI	10.3389/fmars.2023.1296052
	Planktonic carbon metabolism of an underwater coral atoll in the oligotrophic sea: a case study of Zhongsha Atoll, Central South China Sea
	Xiang, Chenhui; Zhong, Yu; Li, Gang; Song, Xingyu; Huang, Yadong; Wang, Zhen; Zheng, Chuanyang; Huang, Liangmin
通讯作者	Song, XY
来源期刊	FRONTIERS IN MARINE SCIENCE
EISSN	2296-7745
出版年	2023
卷号	10
英文摘要	Coral atolls are widely recognized as oases of remarkable biodiversity and productivity within the oligotrophic open ocean. However, considerable debate surrounds the net carbon metabolism of planktonic communities in oceanic coral atolls and their contribution to the overall carbon budget of the ocean. Zhongsha Atoll, situated in the central South China Sea, represents one of the largest submerged reef atolls globally. Despite its significance, the ecological environment and characteristics of community production and metabolism at Zhongsha Atoll have been scarcely studied, and it remains uncertain whether these features differ from those observed in barrier-type reefs. In this study, we examined the gross primary production (GPP), community respiration (CR), and net community production (NCP) of the planktonic community in Zhongsha Atoll and its surrounding waters from 22 June to 6 July 2020. We also analyzed the potential influences of their distribution patterns. Our findings revealed that CR did not vary significantly with depth and it was considerably higher than GPP. As a result, the waters at the euphotic depth of Zhongsha Atoll were found to be heterotrophic, with negative NCP. Additionally, the correlation analysis demonstrated a negative relationship between NCP and CR. The NCP values were -35.28 +/- 26.73 and -53.18 +/- 31.77 mg C m-3 d-1 for the surface and chlorophyll maximum (DCM) layers, respectively. The NCP for the upper water column was -3023 mg C m-2 d-1. The waters above the reef flat (FL) exhibited higher primary productivity, with GPP in the surface and DCM layer being 1.61 and 2.71 times greater, respectively, than in the surrounding oceanic regions. However, the FL displayed a greater level of heterotrophy due to its stronger CR. In conclusion, the carbon metabolism of the planktonic community in submerged Zhongsha Atoll acts as a source of atmospheric CO2, and the distribution of coral reefs considerably contributes to the efficiency of carbon cycling within the atoll.
英文关键词	coral atoll planktonic carbon metabolism primary production community respiration net carbon production
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001124532600001
WOS关键词	DEEP CHLOROPHYLL MAXIMUM ; PHYTOPLANKTON BIOMASS ; PRODUCTIVITY ; PATTERNS ; REEFS ; COMMUNITY ; LAGOON ; PICOPHYTOPLANKTON ; PICOPLANKTON ; THRESHOLDS
WOS类目	Environmental Sciences ; Marine & Freshwater Biology
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396546
推荐引用方式 GB/T 7714	Xiang, Chenhui,Zhong, Yu,Li, Gang,et al. Planktonic carbon metabolism of an underwater coral atoll in the oligotrophic sea: a case study of Zhongsha Atoll, Central South China Sea[J],2023,10.
APA	Xiang, Chenhui.,Zhong, Yu.,Li, Gang.,Song, Xingyu.,Huang, Yadong.,...&Huang, Liangmin.(2023).Planktonic carbon metabolism of an underwater coral atoll in the oligotrophic sea: a case study of Zhongsha Atoll, Central South China Sea.FRONTIERS IN MARINE SCIENCE,10.
MLA	Xiang, Chenhui,et al."Planktonic carbon metabolism of an underwater coral atoll in the oligotrophic sea: a case study of Zhongsha Atoll, Central South China Sea".FRONTIERS IN MARINE SCIENCE 10(2023).