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DOI	10.5194/bg-17-6271-2020
	Potential bioavailability of organic matter from atmospheric particles to marine heterotrophic bacteria
	Djaoudi, Kahina; Van Wambeke, France; Barani, Aude; Bhairy, Nagib; Chevaillier, Servanne; Desboeufs, Karine; Nunige, Sandra; Labiadh, Mohamed; des Tureaux, Thierry Henry; Lefevre, Dominique; Nouara, Amel; Panagiotopoulos, Christos; Tedetti, Marc; Pulido-Villena, Elvira
通讯作者	Djaoudi, K
来源期刊	BIOGEOSCIENCES
ISSN	1726-4170
EISSN	1726-4189
出版年	2020
卷号	17 期号:24 页码:6271-6285
英文摘要	The surface ocean receives important amounts of organic carbon from atmospheric deposition. The degree of bioavailability of this source of organic carbon will determine its impact on the marine carbon cycle. In this study, the potential availability of dissolved organic carbon (DOC) leached from both desert dust and anthropogenic aerosols to marine heterotrophic bacteria was investigated. The experimental design was based on 16 d incubations, in the dark, of a marine bacterial inoculum into artificial seawater amended with water-soluble Saharan dust (D treatment) and anthropogenic (A treatment) aerosols, so that the initial DOC concentration was similar between treatments. Glucose-amended (G) and non-amended (control) treatments were run in parallel. Over the incubation period, an increase in bacterial abundance (BA) and bacterial production (BP) was observed first in the G treatment, followed then by the D and finally A treatments, with bacterial growth rates significantly higher in the G and D treatments than the A treatment. Following this growth, maxima of BP reached were similar in the D (879 +/- 64 ng C L-1 h(-1); n = 3) and G (648 +/- 156 ng C L-1 h(-1); n = 3) treatments and were significantly higher than in the A treatment (124 ng C L-1 h(-1); n = 2). The DOC consumed over the incubation period was similar in the A (9 mu M; n = 2) and D (9 +/- 2 mu M; n = 3) treatments and was significantly lower than in the G treatment (22 +/- 3 mu M; n = 3). Nevertheless, the bacterial growth efficiency (BGE) in the D treatment (14.2 +/- 5.5 %; n = 3) compared well with the G treatment (7.6 +/- 2 %; n = 3), suggesting that the metabolic use of the labile DOC fraction in both conditions was energetically equivalent. In contrast, the BGE in the A treatment was lower (1.7 %; n = 2), suggesting that most of the used labile DOC was catabolized. The results obtained in this study highlight the potential of aerosol organic matter to sustain the metabolism of marine heterotrophs and stress the need to include this external source of organic carbon in biogeochemical models for a better constraining of the carbon budget.
类型	Article
语种	英语
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000599653200001
WOS关键词	HUMIC-LIKE SUBSTANCES ; MEDITERRANEAN SEA ; GROWTH EFFICIENCY ; CHEMICAL-CHARACTERIZATION ; MIXING STATE ; CARBON FLUX ; AEROSOLS ; BACTERIOPLANKTON ; OCEAN ; WATER
WOS类目	Ecology ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
来源机构	University of Arizona ; French National Research Institute for Sustainable Development ; E17
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327904
作者单位	[Djaoudi, Kahina; Van Wambeke, France; Barani, Aude; Bhairy, Nagib; Nunige, Sandra; Lefevre, Dominique; Nouara, Amel; Panagiotopoulos, Christos; Tedetti, Marc; Pulido-Villena, Elvira] Aix Marseille Univ, Univ Toulon, CNRS, IRD,MIO UM 110, F-13288 Marseille, France; [Djaoudi, Kahina] Univ Arizona, Mol & Cellular Biol, Tucson, AZ 85721 USA; [Labiadh, Mohamed] IRA Inst Reg Arides Medenine, El Fje4119, Medenine, Tunisia; [des Tureaux, Thierry Henry] Univ Paris, iEES Paris Inst Ecol & Sci Environm Paris, UMR IRD 242, Univ Paris Est Creteil,Sorbonne Univ,CNRS,INRA, F-93143 Bondy, France; [Chevaillier, Servanne; Desboeufs, Karine] Univ Paris, Univ Paris Est Creteil, LISA, Inst Pierre Simon Laplace IPSL,UMR7583, Creteil, France
推荐引用方式 GB/T 7714	Djaoudi, Kahina,Van Wambeke, France,Barani, Aude,et al. Potential bioavailability of organic matter from atmospheric particles to marine heterotrophic bacteria[J]. University of Arizona, French National Research Institute for Sustainable Development, E17,2020,17(24):6271-6285.
APA	Djaoudi, Kahina.,Van Wambeke, France.,Barani, Aude.,Bhairy, Nagib.,Chevaillier, Servanne.,...&Pulido-Villena, Elvira.(2020).Potential bioavailability of organic matter from atmospheric particles to marine heterotrophic bacteria.BIOGEOSCIENCES,17(24),6271-6285.
MLA	Djaoudi, Kahina,et al."Potential bioavailability of organic matter from atmospheric particles to marine heterotrophic bacteria".BIOGEOSCIENCES 17.24(2020):6271-6285.