Soil Bacterial Diversity and Its Vertical Distribution in Stipa klemenzii Community of Urad Desert Steppe

doi:10.7522/j.issn.1000-694X.2016.00053

JOURNAL OF DESERT RESEARCH ›› 2016, Vol. 36 ›› Issue (6): 1564-1570.DOI: 10.7522/j.issn.1000-694X.2016.00053

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Soil Bacterial Diversity and Its Vertical Distribution in Stipa klemenzii Community of Urad Desert Steppe

Wang Shaokun¹, Zhao Xueyong¹, Jia Kunfeng², Gao Baolan³, Qu Hao¹, Mao Wei¹, Lian Jie¹, Chen Min¹, Zhu Yangchun¹

1. Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. Forestry Bureau of Urad Houqi, Urad Houqi 015000, Inner Mongolia, China;
3. Grassland Management Station of Urad Houqi, Urad Houqi 015000, Inner Mongolia, China

Received:2015-12-20 Revised:2016-04-14 Online:2016-11-20 Published:2016-11-20

Abstract

Abstract: Stipa klemenzii community is the typical vegetation in Urad desert steppe. Our observation on soil bacterial diversity and vertical distribution in Stipa klemenzii community showed that:soil bacterial vertical distribution performed 0-5 cm > 10-20 cm > 5-10 cm, and the diversity in the upper layer (0-5 cm) was significantly higher than that in the lower layers (5-10 cm and 10-20 cm). The bacterial community similarities were within 60%-70% among the three layers. The sequences analysis indicated that the bacterial species belonged to different phylum, including Actinobacteria, Gemmatimonadetes, Cyanobacteria, Firmicutes, Proteobacteria and Proteobacteria. Halospirulina sp., Bacillus circulans and Lactobacillus pentosus were the three dominant bacterial species (their abundance occupied 44.05% of all the 16 species). Soil nutrient, texture and pH collaboratively influenced the bacterial community composition and distribution. Soil pH, total nitrogen content and silt and clay content are the key factors to determine soil bacterial community composition in the Stipa klemenzii community of desert steppe, contributing 24.28%, 15.18% and 10.60%, respectively.

Key words: desert steppe, Stipa klemenzii, soil bacterial diversity, vertical distribution, PCR-DGGE

CLC Number:

Q938.1

Wang Shaokun, Zhao Xueyong, Jia Kunfeng, Gao Baolan, Qu Hao, Mao Wei, Lian Jie, Chen Min, Zhu Yangchun. Soil Bacterial Diversity and Its Vertical Distribution in Stipa klemenzii Community of Urad Desert Steppe[J]. JOURNAL OF DESERT RESEARCH, 2016, 36(6): 1564-1570.

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Soil Bacterial Diversity and Its Vertical Distribution in Stipa klemenzii Community of Urad Desert Steppe

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