Impact of wild fish faeces to deep sea dissolved organic carbon as revealed by laboratory incubations

doi:10.1016/j.dsr.2023.104148

	Impact of wild fish faeces to deep sea dissolved organic carbon as revealed by laboratory incubations
	Zhu, Zhuo-Yi 1; Fang, Fu-Tao 1; Hossen, Shipan 2,3; Zhao, Yuan 4; Chen, Zuo-Zhi 5,6; Zeng, Cong 1; Zhou, Meng 1
	2023-10-01
发表期刊	DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
ISSN	0967-0637
卷号	200 页码:9
通讯作者	Zhu, Zhuo-Yi(zhu.zhuoyi@163.com)
摘要	Wild fish faeces play an important role in mediating marine organic carbon cycle, but the faeces released dissolved organic matter (DOM) and its potentials in contribution to refractory DOM is unclear. The mixed wild fish (including mesopelagic fish) faecal samples from the northern South China Sea were collected and incubated up to 75 days using the waters collected at 800 m depth of the same site, to reveal the stability of the faeces released DOM. Our result showed that the faeces had a good DOM-release potential and dissolved organic carbon (DOC) was up to 150 mu M in the first day and reached its maximum (172 mu M) on day 3, which was in comparison with the control group (DOC <70 mu M). In our incubations, the faecal samples contributed net DOC of 110 mu M, in which 42 mu M persisted till the end of the 75 days dark incubation. This meant the faeces-released DOC had a refractory fraction of 38% over the incubation. Total hydrolysable amino acids concentration significantly dropped, and amino acids molecular indicator (DI, AA C yield and D/L ratio) changes over the incubation indicated the fast transformation of DOM from labile to degraded stage. Network analysis was applied to the amino acids and our result showed that D-form amino acids were almost positively coupled with L-form amino acids. Glycine (in mol%) showed consistent accumulation along with DOM degradation. Also, glycine was at the key node position of the amino acids network, showing negative relation with all other amino acids enantiomers in both faeces group and control group. Our results proved that glycine had the potential in tracing the refractory fraction over the DOM degradation.
关键词	DOM Fish faeces Incubation Amino acids Network analysis South China sea
DOI	10.1016/j.dsr.2023.104148
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42090043] ; National Natural Science Foundation of China[41976042] ; Ministry of Science and Technology of China[2014CB441503] ; Oceanic Interdisciplinary Program of Shanghai Jiao Tong University[SL2021MS020] ; Oceanic Interdisciplinary Program of Shanghai Jiao Tong University[SL2022ZD207] ; Shanghai Pilot Program for Basic Research of Shanghai Jiao Tong University[21TQ1400201]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001074079200001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS关键词	AMINO-ACIDS ; MESOPELAGIC FISHES ; NORTHERN SLOPE ; MATTER ; PARTICULATE ; NITROGEN ; BIOAVAILABILITY ; DEGRADATION ; RIVER ; FLUX
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/181775
专题	海洋生态与环境科学重点实验室
通讯作者	Zhu, Zhuo-Yi
作者单位	1.Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai, Peoples R China 2.East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai, Peoples R China 3.Univ Chittagong, Dept Oceanog, Chattogram, Bangladesh 4.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 5.Chinese Acad Fishery Sci CAFS, South China Sea Fisheries Res Inst, Guangzhou, Peoples R China 6.Minist Agr & Rural Affairs, Key Lab Sustainable Utilizat Opensea Fishery, Guangzhou, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Zhuo-Yi,Fang, Fu-Tao,Hossen, Shipan,et al. Impact of wild fish faeces to deep sea dissolved organic carbon as revealed by laboratory incubations[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2023,200:9.
APA	Zhu, Zhuo-Yi.,Fang, Fu-Tao.,Hossen, Shipan.,Zhao, Yuan.,Chen, Zuo-Zhi.,...&Zhou, Meng.(2023).Impact of wild fish faeces to deep sea dissolved organic carbon as revealed by laboratory incubations.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,200,9.
MLA	Zhu, Zhuo-Yi,et al."Impact of wild fish faeces to deep sea dissolved organic carbon as revealed by laboratory incubations".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 200(2023):9.

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