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Assessment of bacterial biomass in the highly contaminated urban Nanming River, Guiyang, SW China
Hao Xiao;  Hua-Yun Xiao;  Pan Wu
2017
Source PublicationActa Geochimica
Volume36Issue:4Pages:638-644
Abstract

High anthropogenic N loads and abundant bacteria are characteristic of highly contaminated urban rivers. To better understand the dispersal and accumulation of bacteria, we determined contents and isotopic compositions of suspended particulate organic matter (SPOM) and bacteria in a highly contaminated urban river (the Nanming) and effluents in winter and summer of 2013. Relative to SPOM, bacterial biomass in the river was depleted in 13C and 15N and its C/N ratio was lower (δ13C: − 33.2‰ ± 3.1‰; δ15N: − 1.5‰ ± 1.2‰; C/N: 4.8 ± 0.6), while effluents showed higher 13C and 15N contents and C/N ratios (δ13C: − 25‰ ± 2.1‰; δ15N: + 8.5‰ ± 1.1‰; C/N: 8.1 ± 1.2). Source recognition of SPOM was based on carbon isotopes because they are conservative and distinct between end-members (effluent detritus and bacterial biomass). Using a mixing model, bacterial biomass in the river was calculated to account for < 20% and < 56% of bulk suspended particulate organic nitrogen in winter and summer, respectively. An N budget showed that bacterial N was a small proportion of total nitrogen (< 7.4%) in the riverwater.

KeywordΔ13c Δ15n Bacterial Biomass n Budget Nanming River
Indexed ByEI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/7709
Collection环境地球化学国家重点实验室
Affiliation1.Resource and Environmental Engineering College, Guizhou University, Guiyang 550025, China
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Lincheng West Road (Jinyang) 99, Guiyang 550081, Guizhou Province, China
Corresponding Author Affilication中国科学院地球化学研究所
Recommended Citation
GB/T 7714
Hao Xiao;Hua-Yun Xiao;Pan Wu. Assessment of bacterial biomass in the highly contaminated urban Nanming River, Guiyang, SW China[J]. Acta Geochimica,2017,36(4):638-644.
APA Hao Xiao;Hua-Yun Xiao;Pan Wu.(2017).Assessment of bacterial biomass in the highly contaminated urban Nanming River, Guiyang, SW China.Acta Geochimica,36(4),638-644.
MLA Hao Xiao;Hua-Yun Xiao;Pan Wu."Assessment of bacterial biomass in the highly contaminated urban Nanming River, Guiyang, SW China".Acta Geochimica 36.4(2017):638-644.
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