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

	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
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	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6447056
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336076
作者单位	Huang Cuihua, Northwest Institute of Eco-Environment and Resources,Chinese Academy of Science, Key Laboratory of Desert and Desertification,Chinese Academy of Sciences;;Minqin Salinization Research Station,Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Luo Jun, Northwest Institute of Eco-Environment and Resources,Chinese Academy of Science, Key Laboratory of Desert and Desertification,Chinese Academy of Sciences;;Minqin Salinization Research Station,Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Xue Xian, Northwest Institute of Eco-Environment and Resources,Chinese Academy of Science, Key Laboratory of Desert and Desertification,Chinese Academy of Sciences;;Minqin Salinization Research Station,Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Wang Tao, Northwest Institute of Eco-Environment and Resources,Chinese Academy of Science, Key Laboratory of Desert and Desertification,Chinese Academy of Sciences;;Minqin Salinization Research Station,Chinese Academy of Sciences, ...
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.