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Soil erosion-related dynamics of soil bacterial communities and microbial respiration

文献类型：期刊论文

作者Li, ZW (reprint author), CAS & MWR, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China.; Li, Zhongwu2,4; Chang, Xiaofeng2; Huang, Jinquan1; Nie, Xiaodong4; Liu, Chun4; Xiao, Haibing2; Liu, Lin2; Wang, Danyang4; Dong, Yuting2,3
刊名APPLIED SOIL ECOLOGY
出版日期2017
卷号119页码:205-213
关键词Soil Erosion Soil Organic Matter Bacterial Community Bacterial Abundance Soil Microbial Respiration
ISSN号0929-1393
DOI10.1016/j.apsoil.2017.06.018
文献子类Article
英文摘要Soil erosion can dramatically change physicochemical soil properties, but little is known about the responses of bacterial communities and microbial respiration to soil erosion. In this study, three sites (upslope, mid-slope and downslope) with different erosional and depositional characteristics were selected along three transects of abandoned land in the Qiaozi watershed of the Chinese Loess Plateau to evaluate the impacts of soil erosion on bacterial communities and microbial respiration. Samples of the topsoil (0-10 cm) and subsoil (10-20 cm), classified as Calcic Cambisols, were collected from these sites. The results showed that lower bacterial abundance was observed in the topsoil of the downslope site (7.58 x 10(8) copies g(-1) soil) relative to the upslope (9.32 x 10(8) copies g(-1) soil) and mid-slope (8.70 x 10(8) copies g(-1) soil) sites. However, no obvious change (P > 0.05) in the bacterial Shannon index and community composition was observed among the sites. Runoff-induced erosion and migration of sediment homogenized the bacterial communities along the eroded slopes. Soil microbial respiration in the topsoil of the downslope site (19.02 +/- 0.25 mg CO2-C kg(-1) soil d(-1)) was significantly (P < 0.05) higher than that of the upslope (15.12 +/- 1.07 mg CO2-C kg(-1) soil d(-1)) and mid-slope (17.75 +/- 0.73 mg CO2-C kg(-1) soil d(-1)) sites, indicating that the deposition of sediment and associated organic matter significantly increased the soil microbial respiration. Multiple stepwise regression analyses showed that available nitrogen was the main explanatory factor for the variation in soil microbial respiration in both the topsoil (60.2%, P = 0.009) and subsoil (80.3%, P = 0.002). Compared to the bacterial properties, the labile organic matter contributed more to the variation. Our work suggested that soil microbial respiration was primarily modulated by the quality of the organic matter.
学科主题Agriculture
URL标识查看原文
出版地AMSTERDAM
语种英语
WOS记录号WOS:000408882500025
出版者ELSEVIER SCIENCE BV
资助机构'Hundred-talent Project' of the Chinese Academy of Sciences; National Natural Science Foundation of China [41271294, 41501298] ; 'Hundred-talent Project' of the Chinese Academy of Sciences; National Natural Science Foundation of China [41271294, 41501298] ; 'Hundred-talent Project' of the Chinese Academy of Sciences; National Natural Science Foundation of China [41271294, 41501298] ; 'Hundred-talent Project' of the Chinese Academy of Sciences; National Natural Science Foundation of China [41271294, 41501298]
源URL[http://ir.iswc.ac.cn/handle/361005/7915]  
专题水保所科研产出--SCI_2017--SCI
通讯作者Li, ZW (reprint author), CAS & MWR, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China.
作者单位1.Yangtze River Sci Res Inst, Dept Soil & Water Conservat, Wuhan 430010, Hubei, Peoples R China
2.CAS & MWR, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
3.Yellow River Conservancy Commiss, Tianshui Soil & Water Conservat Expt Stn, Tianshui 741000, Peoples R China
4.Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
推荐引用方式
GB/T 7714		 Li, ZW ,Li, Zhongwu,Chang, Xiaofeng,et al. Soil erosion-related dynamics of soil bacterial communities and microbial respiration[J]. APPLIED SOIL ECOLOGY,2017,119:205-213.
APA Li, ZW .,Li, Zhongwu.,Chang, Xiaofeng.,Huang, Jinquan.,Nie, Xiaodong.,...&Jiang, Jieyu.(2017).Soil erosion-related dynamics of soil bacterial communities and microbial respiration.APPLIED SOIL ECOLOGY,119,205-213.
MLA Li, ZW ,et al."Soil erosion-related dynamics of soil bacterial communities and microbial respiration".APPLIED SOIL ECOLOGY 119(2017):205-213.

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来源：水土保持研究所

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