Source, transformation and degradation of particulate organic matter and its connection to microbial processes in Jiaozhou Bay, North China

doi:10.1016/j.ecss.2021.107501

	Source, transformation and degradation of particulate organic matter and its connection to microbial processes in Jiaozhou Bay, North China
	Zhou, Bu1,2,4 ; Yuan, Huamao1,2,3,4 ; Song, Jinming1,2,3,4 ; Li, Xuegang 1,2,3,4; Li, Ning 2,3,4,5; Duan, Liqin 1,2,3,4; Yu, Lidong 4,5
	2021-10-05
发表期刊	ESTUARINE COASTAL AND SHELF SCIENCE
ISSN	0272-7714
卷号	260 页码:12
通讯作者	Yuan, Huamao([email protected]) ; Song, Jinming([email protected])
摘要	Microbial processes during the degradation and transformation of marine organic matter (OM) are thought to play an important role in controlling the strength and efficiency of carbon export and preservation in the ocean. However, the detailed relationship between the diagenetic states of OM and microbial activity and community structures remains poorly understood. In this study, particulate amino acids (PAAs), stable carbon and nitrogen isotopic signatures, heterotrophic bacterial abundance (HBA), bacterial community structure and extracellular hydrolytic enzyme activity (EEA) in particulate OM (POM) were investigated in Jiaozhou Bay (JZB), China, with the aim of investigating bacterial degradation and adaption in response to different sources and reactivity of POM in the coastal environment. The results showed that POM from different sources had distinct PAA compositions, diagenetic states, and bacterial features, such as particle attached HBA, EEA and community structure. High PAA concentrations but low contribution of bacterial carbon to particulate organic carbon (POC) and diagenetic alteration of POM were observed in regions with high in situ marine production, where high Chl-a and autochthonous delta 13C and delta 15N signatures were observed. In addition, high HBA and D-amino acid (D-AA) concentrations in POM were also found in the same regions, which indicated that fresh POM also induced rapid bacterial growth and reproduction. However, the lowest D-AA proportion to PAA (mol% D-AA) in those regions still indicated a more obvious supply of AAs from marine sources, which was consistent with the low bacterial carbon contribution to POC and fresh states of POM. In contrast, POM in low primary production regions was highly degraded by bacteria, as reflected by an enrichment in D-AAs and high bacterial contribution. However, high EEA probably driven by the priming effect occurred in regions where fresh planktonic POM was mixed with terrigenous POM. High relative abundances of Flavobacteriia, Alphaproteobacteria and Gammaproteobacteria were observed in fresh planktonic, terrestrial and planktonic mixture and highly degraded POM, respectively, indicating a possible bacterial adaptation strategy to their available OM. Our study has important implications for bacteria-POM interactions and provides insight into the role of bacteria in the degradation and transformation of POM of different sources in coastal systems.
关键词	Amino acids Degradation indicators Bacteria Particulate organic matter Jiaozhou bay
DOI	10.1016/j.ecss.2021.107501
收录类别	SCI
语种	英语
资助项目	Key Project of Center for Ocean Mega-Science of the Chinese Academy of Sciences[COMS2019Q12]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23050501]; Key Science and Technology Innovation Program - Shandong Province; Qingdao National Laboratory for Marine Science and Technology[2018SDKJ0504-1]; National Basic Research Program of China[2015CB452902]; National Natural Science Foundation of China[41976037]; Two-Hundred Talents Plan of Yantai Scholar Project
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Marine & Freshwater Biology ; Oceanography
WOS记录号	WOS:000702688200004
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/176489
专题	海洋生态与环境科学重点实验室
通讯作者	Yuan, Huamao; Song, Jinming
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 5.Chinese Acad Sci, Publ Technol Serv Ctr, Inst Oceanol, Qingdao 266071, Peoples R China
第一作者单位	海洋生态与环境科学重点实验室; 中国科学院海洋大科学研究中心
通讯作者单位	海洋生态与环境科学重点实验室; 中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Zhou, Bu,Yuan, Huamao,Song, Jinming,et al. Source, transformation and degradation of particulate organic matter and its connection to microbial processes in Jiaozhou Bay, North China[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2021,260:12.
APA	Zhou, Bu.,Yuan, Huamao.,Song, Jinming.,Li, Xuegang.,Li, Ning.,...&Yu, Lidong.(2021).Source, transformation and degradation of particulate organic matter and its connection to microbial processes in Jiaozhou Bay, North China.ESTUARINE COASTAL AND SHELF SCIENCE,260,12.
MLA	Zhou, Bu,et al."Source, transformation and degradation of particulate organic matter and its connection to microbial processes in Jiaozhou Bay, North China".ESTUARINE COASTAL AND SHELF SCIENCE 260(2021):12.

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