干旱区生态环境知识资源中心(Arid): Temporal dynamics of dryland soil CO2 efflux using high-frequency measurements: Patterns and dominant drivers among biocrust types, vegetation and bare soil

Arid

DOI	10.1016/j.geoderma.2021.115404
	Temporal dynamics of dryland soil CO2 efflux using high-frequency measurements: Patterns and dominant drivers among biocrust types, vegetation and bare soil
	Chamizo, Sonia; Rodriguez-Caballero, Emilio; Sanchez-Canete, Enrique P.; Domingo, Francisco; Canton, Yolanda
通讯作者	Chamizo, S (corresponding author), Univ Almeria UAL, Dept Agron, Almeria 04120, Spain.
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2022
卷号	405
英文摘要	Soil respiration is an important component of the carbon (C) cycle and a major contributor to total ecosystem C efflux. Knowledge of the factors that drive soil respiration in drylands is limited, despite these regions represent more than 40% of the Earth land's surface. In these environments, biocrusts play an important role in CO2 exchange towards and from soils. However, the temporal dynamics and main drivers of CO2 efflux in biocrusts compared to other representative dryland covers such as bare soil and soil under perennial grasses, has not been fully investigated. In this study, we measured the soil CO2 molar fraction (chi(c)) at 2 and 5 cm depths in representative surface covers (cyanobacteria and lichen dominated biocrusts, soil under the alpha grass Macrochloa tenacissima and bare soil) from a semiarid area in SE Spain (Tabernas desert, Almeria) using small solid-state CO2 sensors, during one hydrological year. We determined the CO2 efflux (F-s) from the 0 to 5 cm soil profile using the gradient method. Our results show that soil chi(c) and F-s were low in all surface covers (on average, 464 ppm at 5 cm) during dry soil periods (soil moisture <0.05 m(3) m(-3)). chi(c) and subsequent F-s rapidly increased after rainfall, and showed the highest values in the soil under grass (M. tenacissima) and lichen biocrusts. Time series analysis of F-s allowed identifying periodic patterns in F-s strongly related to moisture and temperature periodicities. Moisture was the main driver for F-s on timescales of weeks and months, while temperature was the main driver on daily scales. Moisture exerted a greater influence on F-s in lichen and soil under grass, while temperature had a greater effect on F-s in cyanobacteria and bare soil. Estimated annual CO2 efflux was 633 g CO2 m(-2) y(-1) in the soil under M. tenacissima, 450 g CO2 m(-2) y(-1) in the lichen biocrust, 268 g CO2 m(-2) y(-1) in the cyanobacterial biocrust and 188 g CO2 m(-2) y(-1) in the bare soil. On the whole, we demonstrate the suitability of automated F-s measurements for characterising rapid changes in C efflux from dryland surfaces due to changing environmental conditions, which can help improve C predictions in drylands under current climate change.
英文关键词	Biological soil crust Cyanobacteria Lichen Macrochloa tenacissima Temporal dynamics Soil respiration
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000703712100014
WOS关键词	MICROBIAL CONTRIBUTIONS ; TEMPERATURE RESPONSES ; TABERNAS DESERT ; CARBON FIXATION ; GRADIENT-METHOD ; TENGGER DESERT ; ORGANIC-CARBON ; CLIMATE-CHANGE ; SOUTHERN UTAH ; WATER-CONTENT
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363392
作者单位	[Chamizo, Sonia; Rodriguez-Caballero, Emilio; Canton, Yolanda] Univ Almeria UAL, Dept Agron, Almeria 04120, Spain; [Chamizo, Sonia; Rodriguez-Caballero, Emilio; Canton, Yolanda] Univ Almeria CECOUAL, Res Ctr Sci Collect, Almeria 04120, Spain; [Sanchez-Canete, Enrique P.] Univ Granada UGR, Dept Appl Phys, Granada 18071, Spain; [Sanchez-Canete, Enrique P.] Interuniv Inst Earth Syst Res IISTA CEAMA, Granada 18006, Spain; [Domingo, Francisco] Expt Stn Arid Zones EEZA CSIC, Dept Desertificat & Geoecol, Almeria 04120, Spain
推荐引用方式 GB/T 7714	Chamizo, Sonia,Rodriguez-Caballero, Emilio,Sanchez-Canete, Enrique P.,et al. Temporal dynamics of dryland soil CO2 efflux using high-frequency measurements: Patterns and dominant drivers among biocrust types, vegetation and bare soil[J],2022,405.
APA	Chamizo, Sonia,Rodriguez-Caballero, Emilio,Sanchez-Canete, Enrique P.,Domingo, Francisco,&Canton, Yolanda.(2022).Temporal dynamics of dryland soil CO2 efflux using high-frequency measurements: Patterns and dominant drivers among biocrust types, vegetation and bare soil.GEODERMA,405.
MLA	Chamizo, Sonia,et al."Temporal dynamics of dryland soil CO2 efflux using high-frequency measurements: Patterns and dominant drivers among biocrust types, vegetation and bare soil".GEODERMA 405(2022).