干旱区生态环境知识资源中心(Arid): Grazing intensity induced alternations of soil microbial community composition in aggregates drive soil organic carbon turnover in a desert steppe

Arid

DOI	10.1016/j.agee.2021.107387
	Grazing intensity induced alternations of soil microbial community composition in aggregates drive soil organic carbon turnover in a desert steppe
	Fan, Jianling; Jin, Hao; Zhang, Chuanhong; Zheng, Jinjin; Zhang, Jun; Han, Guodong
通讯作者	Fan, JL (corresponding author), Nanjing Univ Informat Sci & Technol, Jiangsu Collaborat Innovat Ctr Atmospher Environm, Sch Environm Sci & Engn, Jiangsu Key Lab Atmospher Environm Monitoring & P, 219 Ningliu Rd, Nanjing 210044, Peoples R China. ; Han, GD (corresponding author), Inner Mongolia Agr Univ, Key Lab Grassland Resources,Minist Educ, Minist Agr & Rural Affairs,Key Lab Forage Cultiva, Coll Grassland Resources & Environm,Inner Mongoli, Hohhot, Peoples R China.
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2021
卷号	313
英文摘要	Grazing is the primary land-use strategy for livestock production in grasslands, which regulate the health of grassland ecosystems. However, our understanding of grazing-induced changes in soil microbial community structure and their links to organic carbon (C) in soil aggregates is limited. By using a long-term enclosed grazing desert steppe, we examined impacts of different grazing intensity on the diversity and composition of soil microbial community in different aggregates and their contribution to soil organic C (SOC) turnover. The results showed that 15-year grazing induced a notable increase in the SOC content of the large macroaggregate (2 mm) and silt and clay (SC: < 0.053 mm) fractions, but did not change bulk soil organic C content. Soil prokaryotic communities were significantly impacted by grazing intensity and aggregates fractions (p < 0.01). Microaggregate (0.053-0.25 mm) and the SC fraction hosted relative more sequences of Acidobacteria, Gemmatimonadetes, and Rokubacteria than macroaggregates (0.25-2 mm), but relatively less sequences of Actinobacteria and Bacteroidetes. Co-occurrence network analysis revealed that microaggregates hosted a much more complex network and harbored more keystone taxa than macroaggregates and the SC fraction. Gemmatimonadetes was the dominant phylum (relative abundance similar to 9%) and keystone taxa largely belong to this phylum, and its abundance was positively correlated with the level of SOC. Overall, grazing practice altered the soil prokaryotic community, which led to increase in the organic C level in the large macroaggregate and SC fractions, the early indicators of change in SOC dynamics. Together, our findings suggest that removing livestock from these lands would reduce SOC with probable impact on the productivity of the desert steppe and that proper grazing is an import factor of long-term sustainability of the desert steppe.
英文关键词	Desert steppe Grazing intensity Microbial composition Soil aggregates
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000636220800004
WOS关键词	LONG-TERM FERTILIZATION ; MIDINFRARED SPECTROSCOPY ; BACTERIAL COMMUNITIES ; CONTINENTAL-SCALE ; TYPICAL STEPPE ; MIXED-GRASS ; DIVERSITY ; NITROGEN ; IMPACTS ; MATTER
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
来源机构	南京信息工程大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349360
作者单位	[Fan, Jianling; Jin, Hao; Zhang, Chuanhong; Zheng, Jinjin] Nanjing Univ Informat Sci & Technol, Jiangsu Collaborat Innovat Ctr Atmospher Environm, Sch Environm Sci & Engn, Jiangsu Key Lab Atmospher Environm Monitoring & P, 219 Ningliu Rd, Nanjing 210044, Peoples R China; [Zhang, Jun; Han, Guodong] Inner Mongolia Agr Univ, Key Lab Grassland Resources,Minist Educ, Minist Agr & Rural Affairs,Key Lab Forage Cultiva, Coll Grassland Resources & Environm,Inner Mongoli, Hohhot, Peoples R China
推荐引用方式 GB/T 7714	Fan, Jianling,Jin, Hao,Zhang, Chuanhong,et al. Grazing intensity induced alternations of soil microbial community composition in aggregates drive soil organic carbon turnover in a desert steppe[J]. 南京信息工程大学,2021,313.
APA	Fan, Jianling,Jin, Hao,Zhang, Chuanhong,Zheng, Jinjin,Zhang, Jun,&Han, Guodong.(2021).Grazing intensity induced alternations of soil microbial community composition in aggregates drive soil organic carbon turnover in a desert steppe.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,313.
MLA	Fan, Jianling,et al."Grazing intensity induced alternations of soil microbial community composition in aggregates drive soil organic carbon turnover in a desert steppe".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 313(2021).