DOI: 10.1002/2014GB004878
Scopus记录号: 2-s2.0-84903871127
论文题名: Effects of soot deposition on particle dynamics and microbial processes in marine surface waters
作者: Mari X ; , Lefèvre J ; , Torréton J ; -P ; , Bettarel Y ; , Pringault O ; , Rochelle-Newall E ; , Marchesiello P ; , Menkes C ; , Rodier M ; , Migon C ; , Motegi C ; , Weinbauer M ; G ; , Legendre L
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 7 起始页码: 662
结束页码: 678
语种: 英语
英文关键词: aggregation
; bacteria
; dissolved organic carbon
; particle
; soot
; virus
Scopus关键词: Aerosols
; Agglomeration
; Aquatic ecosystems
; Atmospheric movements
; Bacteria
; Deposition
; Particles (particulate matter)
; Soot
; Stream flow
; Surface waters
; Viruses
; Aggregation process
; Atmospheric transport model
; Bacterial abundance
; Biogeochemical property
; Dissolved organic carbon
; Particle size spectra
; Suspended particles
; Volume concentration
; Dust
; aerosol
; atmospheric deposition
; bacterium
; dissolved organic carbon
; microbial activity
; particle motion
; pelagic ecosystem
; power plant
; seawater
; soot
; surface water
; virus
; New Caledonia [Melanesia]
; Bacteria (microorganisms)
英文摘要: Large amounts of soot are continuously deposited on the global ocean. Even though significant concentrations of soot particles are found in marine waters, the effects of these aerosols on ocean ecosystems are currently unknown. Using a combination of in situ and experimental data, and results from an atmospheric transport model, we show that the deposition of soot particles from an oil-fired power plant impacted biogeochemical properties and the functioning of the pelagic ecosystem in tropical oligotrophic oceanic waters off New Caledonia. Deposition was followed by a major increase in the volume concentration of suspended particles, a change in the particle size spectra that resulted from a stimulation of aggregation processes, a 5% decrease in the concentration of dissolved organic carbon (DOC), a decreases of 33 and 23% in viral and free bacterial abundances, respectively, and a factor ~2 increase in the activity of particle-attached bacteria suggesting that soot introduced in the system favored bacterial growth. These patterns were confirmed by experiments with natural seawater conducted with both soot aerosols collected in the study area and standard diesel soot. The data suggest a strong impact of soot deposition on ocean surface particles, DOC, and microbial processes, at least near emission hot spots. Key Points Soot deposition affects microbial pelagic ecosystems Soot particles adsorb dissolved organic carbon and stimulate aggregation Soot stimulates the activity of particle-attached bacteria ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77539
Appears in Collections: 气候变化事实与影响
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作者单位: IRD, UMR 5119 ECOSYM, Université Montpellier II, Montpellier, France; Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, Marseille, France; IRD, UMR 5566 LEGOS, Université de Toulouse, Toulouse, France; IRD, UMR 7618 IEES-Paris, Ecole Normale Supérieure, Paris, France; IRD, UMR 7159 LOCEAN, Pierre et Marie Curie Université, Paris, France; IRD, UMR 241 EIO, Centre IRD de Tahiti, Papeete, France; Sorbonne Universités, UPMC, Université Paris 06, Villefranche-sur-Mer, France; CNRS, UMR 7093, LOV, Observatoire Océanologique, Villefranche-sur-Mer, France
Recommended Citation:
Mari X,, Lefèvre J,, Torréton J,et al. Effects of soot deposition on particle dynamics and microbial processes in marine surface waters[J]. Global Biogeochemical Cycles,2014-01-01,28(7)