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Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau
Du, Yangong; Ke, Xun; Dai, Licong; Cao, Guangmin; Zhou, Huakun; Guo, Xiaowei
2020
Source PublicationECOLOGY AND EVOLUTION
Volume10Issue:16
AbstractThe response of grassland soil bacterial community characteristics to different grazing intensities is central ecological topics. However, the underlying mechanisms between bacterial abundance, diversity index, and grazing intensity remain unclear. We measured alpine meadow soil bacterial gene richness and diversity index under four grazing intensities using 16S rDNA sequence analysis on the Tibetan Plateau. The results suggest that extreme grazing significantly decreased alpine meadow both bacterial gene abundance and diversity index (p < .05). The lowest operational taxonomic unit numbers were 3,012 +/- 447 copies under heavy grazing in the growing season. It was significantly lower than heavy grazing with approximately 3,958 +/- 119 copies (p < .05). The Shannon index for medium and high grazing grassland bacterial diversity was slightly higher than for light grazing in the growing season. Furthermore, the lowest index was approximately 9.20 +/- 0.50 for extreme grazing of grassland in the growing season. The average bacterial gene abundance and diversity index in the dormancy period were slightly higher than that in the growing season. Soil bulk density, pH, ammonium, and nitrate nitrogen were the main positive factors driving grazed grassland bacterial communities. Our study provides insight into the response of alpine meadows to grazing intensity, demonstrating that moderate grazing increases bacterial community diversity in grazed grasslands.
Keywordalpine meadow bacterial genes richness diversity index grazing intensity
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/60295
Collection中国科学院西北高原生物研究所
Recommended Citation
GB/T 7714
Du, Yangong,Ke, Xun,Dai, Licong,et al. Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau[J]. ECOLOGY AND EVOLUTION,2020,10(16).
APA Du, Yangong,Ke, Xun,Dai, Licong,Cao, Guangmin,Zhou, Huakun,&Guo, Xiaowei.(2020).Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau.ECOLOGY AND EVOLUTION,10(16).
MLA Du, Yangong,et al."Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau".ECOLOGY AND EVOLUTION 10.16(2020).
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