干旱区生态环境知识资源中心(Arid): Increase in medium-size rainfall events will enhance the C-sequestration capacity of biological soil crusts

Arid

DOI	10.3724/SP.J.1226.2019.00081
	Increase in medium-size rainfall events will enhance the C-sequestration capacity of biological soil crusts
	Huang, CuiHua; Peng, Fei; Shibata, Itaru; Luo, Jun; Xue, Xian; Akashi, Kinya; Tsunekawa, Atsushi; Wang, Tao
通讯作者	Peng, F
来源期刊	SCIENCES IN COLD AND ARID REGIONS
ISSN	1674-3822
出版年	2019
卷号	11 期号:1 页码:81-92
英文摘要	Biological soil crusts (BSCs) play important roles in the carbon (C) balance in arid regions. Net C balance of BSCs is strongly dependent on rainfall and consequent activation of microbes in the BSCs. The compensation-rainfall size for BSCs (the minimum rainfall amount for a positive net C balance) is assumed to be different with BSCs of different developmental stages. A field experiment with simulated rainfall amount (SRA) of 0, 1, 5, 10, 20, and 40 mm was conducted to examine the C fluxes and compensation-rainfall size of BSCs in different parts of fixed dunes in the ecotone between the Badain Jaran Desert and the Minqin Oasis. We found algae-lichen crust on the interdunes and crest, algae crust on the leeward side, and lichen-moss crust on the windward. Even a small rainfall (1 mm) can activate both photosynthesis and respiration of all types of BSCs. The gross ecosystem production, ecosystem respiration, and net ecosystem exchange were significantly affected by SRA, hours after the simulated rainfall, position on a dune, and their interactions. The rapid activation of photosynthesis provides a C source and therefore could be responsible for the increase of C efflux after each rewetting. C-uptake and -emission capacity of all the BSCs positively correlated with rainfall size, with the lowest C fluxes on the leeward side. The compensation rainfall for a net C uptake was 3.80, 15.54, 8.62, and 1.88 mm for BSCs on the interdunes, the leeward side, the crest, and the windward side, respectively. The whole dune started to show a net C uptake with an SRA of 5 mm and maximized with an SRA of about 30 mm. The compensation-rainfall size is negatively correlated with chlorophyll content. Our results suggest that BSCs will be favored in terms of C balance, and sand dune stabilization could be sustained with an increasing frequency of 5-10 mm rainfall events in the desert-oasis transitional zone.
英文关键词	biological soil crust rainfall size desert-oasis ecotone C balance arid region
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000466176100007
WOS关键词	REVEGETATED AREA ; TENGGER DESERT ; SAND BURIAL ; EXCHANGE ; IMPACT
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/333517
作者单位	[Huang, CuiHua; Peng, Fei; Luo, Jun; Xue, Xian; Wang, Tao] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Minqin Salinizat Res Stn, Lanzhou 730000, Gansu, Peoples R China; [Peng, Fei; Akashi, Kinya; Tsunekawa, Atsushi] Tottori Univ, Int Platform Dryland Res & Educ, Koyama, Tottori 6808550, Japan; [Peng, Fei; Shibata, Itaru; Akashi, Kinya; Tsunekawa, Atsushi] Tottori Univ, Arid Land Res Ctr, Hamasaka, Tottori 6800001, Japan
推荐引用方式 GB/T 7714	Huang, CuiHua,Peng, Fei,Shibata, Itaru,et al. Increase in medium-size rainfall events will enhance the C-sequestration capacity of biological soil crusts[J],2019,11(1):81-92.
APA	Huang, CuiHua.,Peng, Fei.,Shibata, Itaru.,Luo, Jun.,Xue, Xian.,...&Wang, Tao.(2019).Increase in medium-size rainfall events will enhance the C-sequestration capacity of biological soil crusts.SCIENCES IN COLD AND ARID REGIONS,11(1),81-92.
MLA	Huang, CuiHua,et al."Increase in medium-size rainfall events will enhance the C-sequestration capacity of biological soil crusts".SCIENCES IN COLD AND ARID REGIONS 11.1(2019):81-92.