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	The differential effects of sand burial on CO2, CH4, and N2O fluxes from desert biocrust-covered soils in the Tengger Desert, China
	Jia, Rongliang1; Teng, Jialing1,2; Chen, Mengchen1,2; Zhao, Yun1,2; Gao, Yanhong1
刊名	CATENA
	2018
卷号	160页码:252-260
关键词	Biocrusts Sand burial Greenhouse gas Desert
ISSN号	0341-8162
DOI	10.1016/j.catena.2017.09.031
通讯作者	Jia, Rongliang(rongliangjia@163.com)
英文摘要	Biocrusts are a crucial component of desert ecosystems, playing a significant role in greenhouse gas fluxes when they cover soils. However, little is known about whether, and how sand burial, one of the most common disturbances affecting the biodiversity and ecological function of biocrusts, influences fluxes of CO2, CH4, and N2O from the desert biocrust-covered soils. Based on measurements of the fluxes of three greenhouses gases from soils covered with two kinds of biocrusts separately dominated by mixed (i.e., approximately 50% algal coverage and 50% lichen coverage of Endocarpon pusillum Hedw., here cyanobacteria are classed as algae) and moss (i.e., 100% coverage of Didymodon vinealis (Brid.) Zand.) crusts respectively, followed by zero (control), 1 mm (shallow burial), and 10 mm (deep burial) burial depths of sand, we studied the effects of short (20 days) and relatively long periods (one year) of sand burial on the fluxes of three greenhouse gases as well as their relationships with soil temperature and moisture at Shapotou on the southeastern edge of the Tengger Desert. The results of this study showed that sand burial had a significantly positive effect on emission fluxes of CO2 and a negative effect on uptake of CH4 by soils covered with the two types of biocrusts (P < 0.05), but had a differential effect on N2O fluxes depending on burial depth. Shallow burial dramatically increased N2O emissions from the biocrust-covered soils (P < 0.05), but the opposite was observed under deep burial. As burial time increased, the increase of CO2 emissions decreased, but changes in fluxes of CH4 and N2O varied with biocrust types and burial depths, respectively. In addition, results showed that CO2 fluxes from the two biocrusts were closely related to soil temperature and moisture; thereby increased with the raised soil temperature at 5 cm depth and soil moisture caused by sand burial. In contrast, CH4 and N2O emissions were not clearly related to temperature or moisture. Overall, the increase in global warming potential caused by sand burial indicates that this kind of deposition may aggravate the greenhouse effect of desert areas covered with biocrusts.
收录类别	SCI
WOS关键词	ATMOSPHERIC METHANE ; GRASSLAND ECOSYSTEM ; NITROGEN DYNAMICS ; GRAZING INTENSITY ; REVEGETATED AREA ; OXIDE EMISSION ; INNER-MONGOLIA ; NORTHERN CHINA ; CARBON-DIOXIDE ; MOJAVE DESERT
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000414880400026
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557640
专题	寒区旱区环境与工程研究所
通讯作者	Jia, Rongliang
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Jia, Rongliang,Teng, Jialing,Chen, Mengchen,et al. The differential effects of sand burial on CO2, CH4, and N2O fluxes from desert biocrust-covered soils in the Tengger Desert, China[J]. CATENA,2018,160:252-260.
APA	Jia, Rongliang,Teng, Jialing,Chen, Mengchen,Zhao, Yun,&Gao, Yanhong.(2018).The differential effects of sand burial on CO2, CH4, and N2O fluxes from desert biocrust-covered soils in the Tengger Desert, China.CATENA,160,252-260.
MLA	Jia, Rongliang,et al."The differential effects of sand burial on CO2, CH4, and N2O fluxes from desert biocrust-covered soils in the Tengger Desert, China".CATENA 160(2018):252-260.

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