气候变化领域集成服务门户(CCPortal): Biodegradation as an important sink of aromatic hydrocarbons in the oceans

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DOI	10.1038/s41561-018-0285-3
	Biodegradation as an important sink of aromatic hydrocarbons in the oceans
	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.
发表日期	2019
ISSN	17520894
卷号	12 期号:2
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.
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
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124723
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
推荐引用方式 GB/T 7714	González-Gaya B.,Martínez-Varela A.,Vila-Costa M.,et al. Biodegradation as an important sink of aromatic hydrocarbons in the oceans[J],2019,12(2).
APA	González-Gaya B..,Martínez-Varela A..,Vila-Costa M..,Casal P..,Cerro-Gálvez E..,...&Dachs J..(2019).Biodegradation as an important sink of aromatic hydrocarbons in the oceans.Nature Geoscience,12(2).
MLA	González-Gaya B.,et al."Biodegradation as an important sink of aromatic hydrocarbons in the oceans".Nature Geoscience 12.2(2019).