Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau

NWIPB OpenIR

	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
发表期刊	ECOLOGY AND EVOLUTION
卷号	10 期号:16
摘要	The 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.
关键词	alpine meadow bacterial genes richness diversity index grazing intensity
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/60295
专题	中国科学院西北高原生物研究所
推荐引用方式 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).