干旱区生态环境知识资源中心(Arid): Divergent effects of biological soil crusts on soil respiration between bare patches and shrub patches under simulated rainfall in a desert ecosystem in Northwest China

Arid

DOI	10.1016/j.still.2021.105185
	Divergent effects of biological soil crusts on soil respiration between bare patches and shrub patches under simulated rainfall in a desert ecosystem in Northwest China
	Wang, Yang; Li, Xiaoyan; Wu, Xiuchen; Hong, Yu; Wang, Tiejuan; Zuo, Fenglin; Zhang, Jinghui; Yang, Xiaofan
通讯作者	Li, XY (corresponding author), Beijing Normal Univ, Sch Nat Resources, Fac Geog Sci, Beijing 100875, Peoples R China.
来源期刊	SOIL & TILLAGE RESEARCH
ISSN	0167-1987
EISSN	1879-3444
出版年	2021
卷号	214
英文摘要	The important role of biological soil crusts (biocrusts) in determining the soil carbon balance in dryland ecosystems under future climate change has been widely explored. However, when assessing the effects of biocrusts on soil respiration, few studies have considered biocrusts in bare soil patches and shrub soil patches. A field experiment was performed with five simulated rainfall addition events (0, 5, 15, 25, and 40 mm) in shrub and bare soil patches in June (early growing season, EGS), July (middle growing season, MGS) and September (late growing season, LGS) in 2016 and 2017. Our objective was to examine whether biocrusts at shrub and bare soil patches have the same effect on soil respiration under altered rainfall regimes. The results showed that the removal of biocrusts from bare patches reduced soil respiration by 15 % after rainfall amounts of 5-40 mm and increased the subsurface soil temperature and decreased the soil moisture after various rainfall treatments. However, in shrub patches, the removal of biocrusts led to a significant increase in soil respiration of 57 % and subsequent increases in subsurface soil temperature and moisutre. The discrepancy in the soil respiration response between the two types of patches might be attributable to the increase in soil infiltration after biocrust removal, with a greater stimulating increase in soil carbon emissions stimulated in the shrub patches than in the bare patches due to more the greater amounts of roots distributed under the former shrub patches. Our results indicate that the destruction of biocrusts in shrub patches may reduce the ability of biocrust ecosystems to become a net carbon sinks, with potentially negative consequences for ecosystem function and sustainability in water-limited regions.
英文关键词	Soil respiration Biological soil crusts Shrub patches Bare patches Rainfall regimes
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000701908300003
WOS关键词	HEIHE RIVER-BASIN ; PRECIPITATION PULSES ; SEMIARID ECOSYSTEMS ; CO2 EFFLUX ; CARBON ; RESPONSES ; COVER ; INFILTRATION ; SURFACE ; RUNOFF
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364702
作者单位	[Hong, Yu; Wang, Tiejuan] Inner Mongolia Normal Univ, Coll Life Sci & Technol, Hohhot 010022, Peoples R China; [Li, Xiaoyan; Wu, Xiuchen; Zuo, Fenglin; Yang, Xiaofan] Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China; [Li, Xiaoyan; Wu, Xiuchen; Zuo, Fenglin; Yang, Xiaofan] Beijing Normal Univ, Sch Nat Resources Sci, Fac Geog Sci, Beijing 100875, Peoples R China; [Zhang, Jinghui] Inner Mongolia Univ, Sch Ecol & Environm, Hohhot 010021, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yang,Li, Xiaoyan,Wu, Xiuchen,et al. Divergent effects of biological soil crusts on soil respiration between bare patches and shrub patches under simulated rainfall in a desert ecosystem in Northwest China[J]. 北京师范大学,2021,214.
APA	Wang, Yang.,Li, Xiaoyan.,Wu, Xiuchen.,Hong, Yu.,Wang, Tiejuan.,...&Yang, Xiaofan.(2021).Divergent effects of biological soil crusts on soil respiration between bare patches and shrub patches under simulated rainfall in a desert ecosystem in Northwest China.SOIL & TILLAGE RESEARCH,214.
MLA	Wang, Yang,et al."Divergent effects of biological soil crusts on soil respiration between bare patches and shrub patches under simulated rainfall in a desert ecosystem in Northwest China".SOIL & TILLAGE RESEARCH 214(2021).