干旱区生态环境知识资源中心(Arid): Soil nitrogen and climate drive the positive effect of biological soil crusts on soil organic carbon sequestration in drylands: A Meta-analysis

Arid

DOI	10.1016/j.scitotenv.2021.150030
	Soil nitrogen and climate drive the positive effect of biological soil crusts on soil organic carbon sequestration in drylands: A Meta-analysis
	Xu, Hengkang; Zhang, Yingjun; Shao, Xinqing; Liu, Nan
通讯作者	Liu, N (corresponding author), China Agr Univ, Coll Grassland Sci & Technol, 2 Yuan Ming Yuan West Rd, Beijing 100193, Peoples R China. ; Liu, N (corresponding author), Minist Agr, Key Lab Grassland Management & Rat Utilizat, Beijing 100193, Peoples R China.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2022
卷号	803
英文摘要	Biological soil crusts (BSCs), known as ecological engineers, play an important role in soil organic carbon (SOC) sequestration in dryland ecosystems. Although numerous individual studies had been conducted, the global patterns of the changes in SOC concentration following BSCs establishment remain unclear. In this study, we performed a comprehensive meta-analysis of 184 independent observations at 47 sites to quantify the responses of SOC and other soil variables to BSCs establishment and identify the underlying mechanisms. Our results showed that BSCs generally increased SOC by 70.9% compared to the controls (uncrusted soil), and the positive effects of BSCs on SOC in deserts (120.3%) were stronger than those in grasslands (32.7%). Mosses and lichens had a stronger positive effect on SOC than algae crusts (67.5%, 82.8%, and 58.2% respectively). Mixed crusts accumulated more SOC (181.6%) than single (moss, lichen and algae) crusts. The presence of BSCs considerably increased total nitrogen (TN) (+80.7%), total phosphorus (TP) (+20.3%), available N (+62.7%), and available P (+14.3%). Significant relationships were observed among the effect size of SOC and climate and soil N and Pin both desert and grassland. The random forest analysis showed that TN could be considered as a determinant of the concentration of SOC, followed by climate (P < 0.01). Our study shows that the capacity of the BSCs to fix and store C could be regulated by soil N and P dynamics, indicating a major finding opening new ways to promote soil recovery and formation. Our findings highlight the remarkable contribution of mixed crusts to soil C pools; this contribution needs to be incorporated into regional and global models to predict the effects of human disturbance on drylands worldwide and for assessing the soil C budget. (c) 2021 Published by Elsevier B.V.
英文关键词	Biological soil crust Meta-analysis Soil enzyme activities Soil N P stoichiometry
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000701971500018
WOS关键词	GURBANTUNGGUT DESERT ; BIOCRUST DEVELOPMENT ; SUCCESSIONAL STAGES ; ENZYME-ACTIVITIES ; TENGGER DESERT ; RAINFALL ; COMMUNITIES ; RESPONSES ; GRADIENT ; EXCHANGE
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364613
作者单位	[Xu, Hengkang; Zhang, Yingjun; Shao, Xinqing; Liu, Nan] China Agr Univ, Coll Grassland Sci & Technol, 2 Yuan Ming Yuan West Rd, Beijing 100193, Peoples R China; [Zhang, Yingjun; Liu, Nan] Minist Agr, Key Lab Grassland Management & Rat Utilizat, Beijing 100193, Peoples R China
推荐引用方式 GB/T 7714	Xu, Hengkang,Zhang, Yingjun,Shao, Xinqing,et al. Soil nitrogen and climate drive the positive effect of biological soil crusts on soil organic carbon sequestration in drylands: A Meta-analysis[J]. 中国农业大学,2022,803.
APA	Xu, Hengkang,Zhang, Yingjun,Shao, Xinqing,&Liu, Nan.(2022).Soil nitrogen and climate drive the positive effect of biological soil crusts on soil organic carbon sequestration in drylands: A Meta-analysis.SCIENCE OF THE TOTAL ENVIRONMENT,803.
MLA	Xu, Hengkang,et al."Soil nitrogen and climate drive the positive effect of biological soil crusts on soil organic carbon sequestration in drylands: A Meta-analysis".SCIENCE OF THE TOTAL ENVIRONMENT 803(2022).