Assessment of bacterial biomass in the highly contaminated urban Nanming River, Guiyang, SW China | |
Hao Xiao; Hua-Yun Xiao; Pan Wu | |
2017 | |
Source Publication | Acta Geochimica
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Volume | 36Issue: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. |
Keyword | Δ13c Δ15n Bacterial Biomass n Budget Nanming River |
Indexed By | EI |
Language | 英语 |
Document Type | 期刊论文 |
Identifier | http://ir.gyig.ac.cn/handle/42920512-1/7709 |
Collection | 环境地球化学国家重点实验室 |
Affiliation | 1.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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Assessment of bacter(512KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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