干旱区生态环境知识资源中心(Arid): Non-rainfall water inputs: A key water source for biocrust carbon fixation

Arid

DOI	10.1016/j.scitotenv.2021.148299
	Non-rainfall water inputs: A key water source for biocrust carbon fixation
	Chamizo, Sonia; Rodriguez-Caballero, Emilio; Moro, Maria Jose; Canton, Yolanda
通讯作者	Chamizo, S (corresponding author), Univ Almeria, Dept Agron, Almeria 04120, Spain.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2021
卷号	792
英文摘要	Links between water and carbon (C) cycles in drylands are strongly regulated by biocrusts. These widespread communities in the intershrub spaces of drylands are able to use non-rainfall water inputs (NRWI) (fog, dewfall and water vapour) to become active and fix carbon dioxide (CO2), converting biocrusts into the main soil C contributors during periods in which vegetation remains inactive. In this study, we first evaluated the influence of biocrust type on NRWI uptake using automated microlysimeters, and second, we performed an outdoor experiment to examine how NRWI affected C exchange (photosynthesis and respiration) in biocrusts. NRWI uptake increased from incipient cyanobacteria to well-developed cyanobacteria and lichen biocrusts. NRWI triggered biocrust activity but with contrasting effects on CO2 fluxes depending on the main NRWI source. Fog mainly stimulated respiration of biocrust-covered soils, reaching net CO2 emissions of 0.68 mu mol m(-2) s(-1), while dew had a greater effect stimulating biocrust photosynthesis and resulted in net CO2 uptake of 0.66 mu mol m(-2) s(-1). These findings demonstrate the key role that NRWI play in biocrust activity and the soil C balance in drylands. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Dew Fog Lichen Biocrust photosynthesis Dark respiration Net CO2 uptake
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000689562200009
WOS关键词	BIOLOGICAL SOIL CRUSTS ; CO2 EXCHANGE ; SURFACE ; DESERT ; PHOTOSYNTHESIS ; TEMPERATURE ; RESPONSES ; LICHENS ; FIELD
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364576
作者单位	[Chamizo, Sonia; Rodriguez-Caballero, Emilio; Canton, Yolanda] Univ Almeria, Dept Agron, Almeria 04120, Spain; [Chamizo, Sonia; Rodriguez-Caballero, Emilio; Canton, Yolanda] Univ Almeria CECOUAL, Res Ctr Sci Collect, Almeria 04120, Spain; [Moro, Maria Jose] Univ Alicante, Dept Ecol, Alicante 03690, Spain
推荐引用方式 GB/T 7714	Chamizo, Sonia,Rodriguez-Caballero, Emilio,Moro, Maria Jose,et al. Non-rainfall water inputs: A key water source for biocrust carbon fixation[J],2021,792.
APA	Chamizo, Sonia,Rodriguez-Caballero, Emilio,Moro, Maria Jose,&Canton, Yolanda.(2021).Non-rainfall water inputs: A key water source for biocrust carbon fixation.SCIENCE OF THE TOTAL ENVIRONMENT,792.
MLA	Chamizo, Sonia,et al."Non-rainfall water inputs: A key water source for biocrust carbon fixation".SCIENCE OF THE TOTAL ENVIRONMENT 792(2021).