Spatial Distribution of Nutrients and Bacterial Communities in Sediments of Water Resource Reservoir

LIU Hu; MENG Ting; WANG Min; CHENG Wen

doi:10.13961/j.cnki.stbctb.2016.03.006

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Spatial Distribution of Nutrients and Bacterial Communities in Sediments of Water Resource Reservoir

- Spatial Distribution of Nutrients and Bacterial Communities in Sediments of Water Resource Reservoir
- Bulletin of Soiland Water Conservation Vol. 36, Issue 3, Pages: 24-29(2016)
- 作者机构：
  
  西安理工大学西北旱区生态水利工程国家重点实验室培育基地,陕西,西安,710048
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2016.03.006
  CLC：
- Published：2016
- 稿件说明：
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LIU Hu, MENG Ting, WANG Min, et al. Spatial Distribution of Nutrients and Bacterial Communities in Sediments of Water Resource Reservoir[J]. Bulletin of Soiland Water Conservation, 2016, 36(3): 24-29.
DOI：

LIU Hu, MENG Ting, WANG Min, et al. Spatial Distribution of Nutrients and Bacterial Communities in Sediments of Water Resource Reservoir[J]. Bulletin of Soiland Water Conservation, 2016, 36(3): 24-29. DOI： 10.13961/j.cnki.stbctb.2016.03.006.

摘要

［目的］调查研究水源地水库沉积物中营养盐分布与微生物群落分布状况，揭示沉积物微生物与营养盐迁移转化的相互关系。［方法］在浙江省东部低山丘陵区汤浦水库现场采集沉积物样品，分析其中氮、磷等营养盐与总有机碳含量，并对沉积物中微生物群落结构特征进行克隆文库分析。［结果］（1）沉积物中总有机碳平均含量为14.6 g/kg，总氮平均含量为1.6 g/kg。总有机碳和总氮含量最高的采样点都是H点，最低的都是F采采样；总磷含量最高的采样点是G（含量为1.08 g/kg），含量最低的采样点是L（含量为0.5 g/kg），平均含量为0.8 g/kg。速效磷和铵态氮在在河流入库段含量最高，在库区中部和坝前位置含量较低。（2）沉积物样品中微生物种群差异较大。鉴别出来的10种已知门的细菌，只有变形菌门、酸杆菌门、绿弯菌门和疣微菌门共同存在于各样品。变形菌门在所有样品中的数量最多，约占细菌总数50%～70.8%。［结论］微生物群落分布与沉积物营养盐有一定相关性。皮尔逊相关分析表明，γ变形菌和δ变形菌与总磷存在显著的负相关性，厚壁菌门却与总氮（p<0.05）存在显著的正相关性。

Abstract

[Objective] The spatial distribution of nutrients and bacterial communities in sediments of water resource reservoir were investigated in order to reveal the interrelation between microbes and migration and transformation of nutrient salts.[Methods] Sediment samples were collected in a Tangpu reservoir in low mountain and hilly area of Eastern Zhejiang Province

the content of total organic carbon(TOC)

total nitrogen(TN)

ammonium-nitrogen(NH4+-N)

nitrate-nitrogen(NO3-N)

total phosphorus(TP) and available phosphorous and bacterial community structure were analyzed respectively.[Results] (1) The average TOC content was 14.6 g/kg and the average TN content was 1.6 g/kg in the reservoir sediments. The maximum content of TOC and TN was found in sampling sites H

minimum value was found in sampling site F. The content of TP was in the range of 0.5~1.08 g/kg

the mean value was 0.8 g/kg. Available phosphorus and ammonium nitrogen had a highest content in the river storage section

and showed low levels in central location of the reservoir and dam. (2) In the sediments

microbial population were significantly different. A total of 10 kinds of known phylum were identified

and 4 kinds of phylum(Verru comicrobia. Proteobacteria

Acidobacteria

Chloroflexi

and Verruc omicrobia) were shared among all samples. In all the samples

Proteobacteria predominated about 50%~70.8% of the total bacteria.[Conclusion] Pearson's correlation analysis show a significant negative correlation among Gamma proteobacteria

Delta proteobacteria and TP. While there is a significant positive correlation between Firmicutes and TN (p<0.05).

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