Scopus记录号: 2-s2.0-85060093202
论文题名: Biodegradation as an important sink of aromatic hydrocarbons in the oceans
作者: González-Gaya B. ; Martínez-Varela A. ; Vila-Costa M. ; Casal P. ; Cerro-Gálvez E. ; Berrojalbiz N. ; Lundin D. ; Vidal M. ; Mompeán C. ; Bode A. ; Jiménez B. ; Dachs J.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2019
卷: 12, 期: 2 起始页码: 119
结束页码: 125
语种: 英语
Scopus关键词: aromatic hydrocarbon
; atmospheric deposition
; biodegradation
; biogeochemical cycle
; biomass
; carbon sink
; marine environment
; organic matter
; PAH
; phenanthrene
; seawater
; water column
; Atlantic Ocean
; Indian Ocean
; Pacific Ocean
; Southern Ocean
英文摘要: Atmospheric deposition of semivolatile aromatic hydrocarbons accounts for an important input of organic matter to the surface ocean. Nevertheless, the biogeochemical cycling and sinks of semivolatile aromatic hydrocarbons in the ocean remain largely uncharacterized. Here we present measurements of 64 polycyclic aromatic hydrocarbons in plankton and seawater from the Atlantic, Pacific, Indian and Southern Oceans, as well an assessment of their microbial degradation genes. Concentrations of the more hydrophobic compounds decreased when the plankton biomass was higher, consistent with the relevance of the biological pump. The mass balance for the global oceans showed that the settling fluxes of aromatic hydrocarbons in the water column were two orders of magnitude lower than the atmospheric deposition fluxes. This imbalance was high for low molecular weight hydrocarbons, such as phenanthrene and methylphenanthrenes, highly abundant in the dissolved phase. Parent polycyclic aromatic hydrocarbons were depleted to a higher degree than alkylated polycyclic aromatic hydrocarbons, and the degradation genes for polycyclic aromatic hydrocarbons were found to be ubiquitous in oceanic metagenomes. These observations point to a key role of biodegradation in depleting the bioavailable dissolved hydrocarbons and to the microbial degradation of atmospheric inputs of organic matter as a relevant process for the marine carbon cycle. © 2019, The Author(s), under exclusive licence to Springer Nature Limited. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122612
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona, Spain; Department of Instrumental Analysis and Environmental Chemistry, Institute of Organic Chemistry, IQOG-CSIC, Madrid, Spain; Centre for Ecology and Evolution in Microbial Model Systems, EEMiS, Linnaeus University, Kalmar, Sweden; Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, Barcelona, Spain; Spanish Oceanography Institute, IEO, Oceanographic Centre of A Coruña, A Coruña, Spain
Recommended Citation:
González-Gaya B.,Martínez-Varela A.,Vila-Costa M.,et al. Biodegradation as an important sink of aromatic hydrocarbons in the oceans[J]. Nature Geoscience,2019-01-01,12(2)