Organic Matter in the Surface Microlayer: Insights From a Wind Wave Channel Experiment

doi:10.3389/fmars.2018.00182

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Organic Matter in the Surface Microlayer: Insights From a Wind Wave Channel Experiment
	Grosse, Julia ; Engel, Anja ; Sperling, Martin ; Sun, Cuici 1,2; Friedrichs, Gernot 3,4
刊名	FRONTIERS IN MARINE SCIENCE
	2018
卷号	5 页码:UNSP 182
关键词	air-sea interface dissolved organic carbon amino acids carbohydrates prokaryotes surfactants
DOI	10.3389/fmars.2018.00182
英文摘要	The surface microlayer (SML) is the uppermost thin layer of the ocean and influencing interactions between the air and sea, such as gas exchange, atmospheric deposition and aerosol emission. Organic matter (OM) plays a key role in air-sea exchange processes, but studying how the accumulation of organic compounds in the SML relates to biological processes is impeded in the field by a changing physical environment, in particular wind speed and wave breaking. Here, we studied OM dynamics in the SML under controlled physical conditions in a large annular wind wave channel, filled with natural seawater, over a period of 26 days. Biology in both SML and bulk water was dominated by bacterioneuston and -plankton, respectively, while autotrophic biomass in the two compartments was very low. In general, SML thickness was related to the concentration of dissolved organic carbon (DOC) but not to enrichment of DOC or of specific OM components in the SML. Pronounced changes in OM enrichment and molecular composition were observed in the course of the study and correlated significantly to bacterial abundance. Thereby, hydrolysable amino acids, in particular arginine, were more enriched in the SML than combined carbohydrates. Amino acid composition indicated that less degraded OM accumulated preferentially in the SML. A strong correlation was established between the amount of surfactants coverage and gamma-aminobutric acid, suggesting that microbial cycling of amino acids can control physiochemical traits of the SML. Our study shows that accumulation and cycling of OM in the SML can occur independently of recent autotrophic production, indicating a widespread biogenic control of process across the air-sea exchange.
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/17796]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
作者单位	1.GEOMAR Helmholtz Ctr Ocean Res Kiel, Kiel, Germany 2.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China 3.Chinese Acad Sci, Daya Bay Marine Biol Res Stn, Shenzhen, Peoples R China 4.Univ Kiel, Inst Phys Chem, Kiel, Germany 5.Univ Kiel, KMS Kiel Marine Sci Ctr Interdisciplinary Marine, Kiel, Germany
推荐引用方式 GB/T 7714	Grosse, Julia,Engel, Anja,Sperling, Martin,et al. Organic Matter in the Surface Microlayer: Insights From a Wind Wave Channel Experiment[J]. FRONTIERS IN MARINE SCIENCE,2018,5:UNSP 182.
APA	Grosse, Julia,Engel, Anja,Sperling, Martin,Sun, Cuici,&Friedrichs, Gernot.(2018).Organic Matter in the Surface Microlayer: Insights From a Wind Wave Channel Experiment.FRONTIERS IN MARINE SCIENCE,5,UNSP 182.
MLA	Grosse, Julia,et al."Organic Matter in the Surface Microlayer: Insights From a Wind Wave Channel Experiment".FRONTIERS IN MARINE SCIENCE 5(2018):UNSP 182.