干旱区生态环境知识资源中心(Arid): Grazing accelerates labile and recalcitrant soil carbon loss driving by rare microbial taxa in a desert steppe

Arid

DOI	10.1002/ldr.4030
	Grazing accelerates labile and recalcitrant soil carbon loss driving by rare microbial taxa in a desert steppe
	Fan, Jianling; Zhang, Chuanhong; Jin, Hao; Zhang, Jun; Han, Guodong
通讯作者	Fan, JL (corresponding author), Nanjing Univ Informat Sci & Technol, Jiangsu Key Lab Atmospher Environm Monitoring & P, Jiangsu Collaborat Innovat Ctr Atmospher Environm, Sch Environm Sci & Engn, 219 Ningliu Rd, Nanjing 210044, Peoples R China. ; Han, GD (corresponding author), Inner Mongolia Agr Univ, Key Lab Forage Cultivat Proc & High Efficient Uti, Key Lab Grassland Resources,Minist Agr & Rural Af, Minist Educ,Coll Grassland Resources & Environm,I, Hohhot, Peoples R China.
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2021
卷号	32 期号:15 页码:4241-4253
英文摘要	Livestock grazing in grasslands regulates the multifunctionality of those ecosystems and has an adverse effect on soil carbon (C) dynamics and fractions. However, our understanding of grazing-induced changes in soil microbial community and their links to soil organic C (SOC) fractions is limited. By using a long-term grazing experiment in desert steppe, we examined impacts of different grazing intensity on the diversity and composition of soil microbial community and their potential contribution to SOC content and fractions. The results showed that 15-year grazing reduced total SOC (TSOC), albeit not significant, but induced a notable decrease in both labile and recalcitrant SOC fractions, especially under high grazing intensity. Soil prokaryotic communities were not significantly impacted by grazing intensity. However, we observed that sensitive operational taxonomic units (OTUs), identified by indicator taxa analysis, grouped in distinct modules that reflected the different grazing intensities, suggesting that groups of microbes may cluster together and respond to grazing intensity. Association networks of prokaryotic OTUs and organic C fractions showed that SOC fractions were significantly related to rare taxa, indicating that grazing practice may act as a kind of environmental filtering and strongly affected soil microbial rare taxa and thereafter SOC fractions. Together, our findings suggest that grazing intensity did not change total microbial community and TSOC but affected SOC fractions by altering rare taxa. Overall, our results indicated that soil C fractions and rare microbial taxa were more sensitive to grazing intensity, which could act as indicator of variations in ecosystem functions in the semi-arid desert steppe.
英文关键词	desert steppe grazing intensity microbial composition rare taxa SOC fractions
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000675060500001
WOS关键词	ORGANIC-MATTER ; SEMIARID STEPPE ; TEMPERATURE SENSITIVITY ; LITTER DECOMPOSITION ; GRASSLAND ; ECOSYSTEM ; NITROGEN ; COMMUNITIES ; INTENSITY ; HERBIVORES
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
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/2XILL650/364101
作者单位	[Fan, Jianling; Zhang, Chuanhong; Jin, Hao] Nanjing Univ Informat Sci & Technol, Jiangsu Key Lab Atmospher Environm Monitoring & P, Jiangsu Collaborat Innovat Ctr Atmospher Environm, Sch Environm Sci & Engn, 219 Ningliu Rd, Nanjing 210044, Peoples R China; [Zhang, Jun; Han, Guodong] Inner Mongolia Agr Univ, Key Lab Forage Cultivat Proc & High Efficient Uti, Key Lab Grassland Resources,Minist Agr & Rural Af, Minist Educ,Coll Grassland Resources & Environm,I, Hohhot, Peoples R China
推荐引用方式 GB/T 7714	Fan, Jianling,Zhang, Chuanhong,Jin, Hao,et al. Grazing accelerates labile and recalcitrant soil carbon loss driving by rare microbial taxa in a desert steppe[J]. 南京信息工程大学,2021,32(15):4241-4253.
APA	Fan, Jianling,Zhang, Chuanhong,Jin, Hao,Zhang, Jun,&Han, Guodong.(2021).Grazing accelerates labile and recalcitrant soil carbon loss driving by rare microbial taxa in a desert steppe.LAND DEGRADATION & DEVELOPMENT,32(15),4241-4253.
MLA	Fan, Jianling,et al."Grazing accelerates labile and recalcitrant soil carbon loss driving by rare microbial taxa in a desert steppe".LAND DEGRADATION & DEVELOPMENT 32.15(2021):4241-4253.