干旱区生态环境知识资源中心(Arid): Warming effects on soil respiration in moss-dominated crusts in the Tengger Desert, northern China

Arid

DOI	10.1007/s11104-019-04255-y
	Warming effects on soil respiration in moss-dominated crusts in the Tengger Desert, northern China
	Guan, Chao 1,2; Li, Xinrong2 ; Chen, Ning 1; Zhang, Peng2 ; Zhao, Changming 1
通讯作者	Li, Xinrong
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2019
卷号	443 期号:1-2 页码:591-603
英文摘要	Background and aims Despite the important role of biological soil crusts in the soil carbon cycles of desert ecosystems, the responses of soil respiration in biological soil crust-dominated areas to warming are not well understood. The goal of this study was to investigate the expected increases in temperature on soil respiration both diurnally and seasonally in biological soil crust-dominated areas. Methods We used open-top chambers to simulate warming in the Shapotou region in the Tengger Desert, northern China. An automated soil respiration system was used to measure the soil respiration rates in moss-dominated crusts. The measured environmental variables included the precipitation, volumetric soil water content, air temperature and soil temperature at depths of 0, 5, 10, 20, and 50 cm. Results The response of soil respiration to warming is a function of soil moisture following rainfall in desert ecosystems. Our results showed that 1.5 degrees C of simulated warming significantly decreased soil respiration, indicating that the inhibition of soil respiration was likely due to the reduction in soil water content at a relatively high temperature. Over daily cycles, hourly soil respiration rates have commonly been related to hourly temperatures. The observed diel hysteresis between hourly soil respiration and temperature resulted in semielliptical hysteresis loops, and the temperature often lagged behind soil respiration for several hours. The lag times between soil respiration and temperature were significantly and positively related to the depth of the soil temperature measurements. The proximate reason for the diel hysteresis between soil respiration and temperature was likely a mismatch between the depth of CO2 production and the depth of the temperature measurements. Conclusions Our results indicate that warming increases the response of soil respiration to soil water availability in biological soil crust-dominated desert ecosystems. Therefore, the accelerated drying effect of warming on soil respiration and diel soil respiration patterns between soil respiration and temperature at different depths should be considered in future soil carbon cycle models for biological soil crust-dominated desert ecosystems.
英文关键词	Soil respiration Biological soil crust Warming Temperature Diel hysteresis
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000493661800039
WOS关键词	NITROGEN ADDITION ; SEASONAL-VARIATION ; ORGANIC-CARBON ; CLIMATE-CHANGE ; LOESS PLATEAU ; TEMPERATURE ; VEGETATION ; RESPONSES ; ECOSYSTEM ; BIOCRUST
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
EI主题词	2019-10-01
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310205
作者单位	1.Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China; 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Guan, Chao,Li, Xinrong,Chen, Ning,et al. Warming effects on soil respiration in moss-dominated crusts in the Tengger Desert, northern China[J]. 兰州大学,2019,443(1-2):591-603.
APA	Guan, Chao,Li, Xinrong,Chen, Ning,Zhang, Peng,&Zhao, Changming.(2019).Warming effects on soil respiration in moss-dominated crusts in the Tengger Desert, northern China.PLANT AND SOIL,443(1-2),591-603.
MLA	Guan, Chao,et al."Warming effects on soil respiration in moss-dominated crusts in the Tengger Desert, northern China".PLANT AND SOIL 443.1-2(2019):591-603.