干旱区生态环境知识资源中心(Arid): Trampling Disturbance of Biocrust Enhances Soil Carbon Emission

Arid

DOI	10.1016/j.rama.2020.02.005
	Trampling Disturbance of Biocrust Enhances Soil Carbon Emission
	Yang, Xueqin; Xu, Mingxiang; Zhao, Yunge; Bao, Tianli; Ren, Wei; Shi, Yafang
通讯作者	Zhao, YG
来源期刊	RANGELAND ECOLOGY & MANAGEMENT
ISSN	1550-7424
EISSN	1551-5028
出版年	2020
卷号	73 期号:4 页码:501-510
英文摘要	Biocrusts play an important role in the carbon cycle in arid and semiarid ecosystems. Activities such as livestock grazing can disturb ecosystem functions of biocrusts. However, it is unclear whether disturbance intensity impacts carbon emission from these biocrusts. Few studies have investigated the transformation of carbon within biocrusts after disturbance. Here, we conducted a field experiment on the Loess Plateau, China, in which we artificially simulated different intensities of trampling to examine the response of biocrust carbon emissions to disturbance. Our results demonstrate that disturbance significantly reduced biocrust coverage. The largest decreases were observed in the second through fourth intensity, which declined significantly by 12.6-17.1%. Disturbance decreased soil organic carbon content in the biocrust layer by 2.6 g kg(-1) -3.7 g kg(-1 )depending on the disturbance intensity. Disturbance significantly increased the soil easily oxidizable carbon (SEOC) content in the biocrust layer. The soil microbial biomass carbon (SMBC) content of the fifth intensity increased significantly by 70.3%. The soil mineralizable carbon (SMC) content of the fourth intensity increased significantly by 78.8%. Soil carbon emissions increased significantly with increasing disturbance intensity, were higher at night than during the day, and were higher in the summer than in the fall. Together, these findings indicate that the increase of carbon emission was mainly due to increases in SEOC and SMC. Trampling disturbance increases carbon emissions from biocrust soils. These losses of CO2 from biocrust soils after disturbance may substantially reduce the biocrust contribution to the soil carbon budget. (C) 2020 The Society for Range Management. Published by Elsevier Inc. All rights reserved.
英文关键词	biocrust coverage carbon fractions disturbance intensity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000547491400005
WOS关键词	ORGANIC-MATTER ; LOESS PLATEAU ; PRECIPITATION PULSES ; GRAZING EXCLUSION ; STEPPE GRASSLAND ; DIOXIDE FLUXES ; NITROGEN ; CRUSTS ; RESPIRATION ; DESERT
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325004
作者单位	[Yang, Xueqin; Xu, Mingxiang; Zhao, Yunge; Bao, Tianli; Ren, Wei] Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; [Yang, Xueqin] Henan Inst Sci & Technol, Coll Life Sci & Technol, Xinxiang 453003, Henan, Peoples R China; [Yang, Xueqin; Shi, Yafang] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Yang, Xueqin,Xu, Mingxiang,Zhao, Yunge,et al. Trampling Disturbance of Biocrust Enhances Soil Carbon Emission[J]. 西北农林科技大学,2020,73(4):501-510.
APA	Yang, Xueqin,Xu, Mingxiang,Zhao, Yunge,Bao, Tianli,Ren, Wei,&Shi, Yafang.(2020).Trampling Disturbance of Biocrust Enhances Soil Carbon Emission.RANGELAND ECOLOGY & MANAGEMENT,73(4),501-510.
MLA	Yang, Xueqin,et al."Trampling Disturbance of Biocrust Enhances Soil Carbon Emission".RANGELAND ECOLOGY & MANAGEMENT 73.4(2020):501-510.