气候变化领域集成服务门户(CCPortal): Rapid depletion of dissolved organic sulphur (DOS) in freshwaters

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DOI	10.1007/s10533-020-00669-4
	Rapid depletion of dissolved organic sulphur (DOS) in freshwaters
	Brailsford F.L.; Glanville H.C.; Wang D.; Golyshin P.N.; Johnes P.J.; Yates C.A.; Jones D.L.
发表日期	2020
ISSN	0168-2563
起始页码	105
结束页码	113
卷号	149 期号:1
英文摘要	Sulphur (S) is a key macronutrient for all organisms, with similar cellular requirements to that of phosphorus (P). Studies of S cycling have often focused on the inorganic fraction, however, there is strong evidence to suggest that freshwater microorganisms may also access dissolved organic S (DOS) compounds (e.g. S-containing amino acids). The aim of this study was to compare the relative concentration and depletion rates of organic 35S-labelled amino acids (cysteine, methionine) with inorganic S (Na2 35SO4) in oligotrophic versus mesotrophic river waters draining from low nutrient input and moderate nutrient input land uses respectively. Our results showed that inorganic SO4 2− was present in the water column at much higher concentrations than free amino acids. In contrast to SO4 2−, however, cysteine and methionine were both rapidly depleted from the mesotrophic and oligotrophic waters with a halving time < 1 h. Only a small proportion of the DOS removed from solution was mineralized and excreted as SO4 2− (< 16% of the total taken up) suggesting that the DOS could be satisfying a demand for carbon (C) and S. In conclusion, even though inorganic S was abundant in freshwater, it appears that the aquatic communities retained the capacity to take up and assimilate DOS. © 2020, The Author(s).
英文关键词	Dissolved organic matter; DOS processing; Nutrient cycling; Radioisotopes; Sulphate
语种	英语
scopus关键词	concentration (composition); freshwater; oligotrophic environment; river water; sulfur; sulfur cycle
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153145
作者单位	Environment Centre Wales, Bangor University, Bangor, Gwynedd LL57 2UW, United Kingdom; Centre for Environmental Biotechnology, Bangor University, Bangor, Gwynedd LL57 2UW, United Kingdom; SoilsWest, UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia; School of Geography, Geology and the Environment, Keele University, Staffordshire, ST5 5BG, United Kingdom; School of Geographical Sciences, University of Bristol, University Road, Bristol, BS8 1SS, United Kingdom
推荐引用方式 GB/T 7714	Brailsford F.L.,Glanville H.C.,Wang D.,et al. Rapid depletion of dissolved organic sulphur (DOS) in freshwaters[J],2020,149(1).
APA	Brailsford F.L..,Glanville H.C..,Wang D..,Golyshin P.N..,Johnes P.J..,...&Jones D.L..(2020).Rapid depletion of dissolved organic sulphur (DOS) in freshwaters.Biogeochemistry,149(1).
MLA	Brailsford F.L.,et al."Rapid depletion of dissolved organic sulphur (DOS) in freshwaters".Biogeochemistry 149.1(2020).