干旱区生态环境知识资源中心(Arid): Increased precipitation differentially changed soil CO2 efflux in arid and humid areas

Arid

DOI	10.1016/j.geoderma.2021.114946
	Increased precipitation differentially changed soil CO2 efflux in arid and humid areas
	Tan, Siyi; Ni, Xiangyin; Yue, Kai; Liao, Shu; Wu, Fuzhong
通讯作者	Wu, FZ (corresponding author), 8 Shangshan Rd, Fuzhou 350007, Peoples R China.
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2021
卷号	388
英文摘要	It has been well acknowledged that a continuous increase in atmospheric carbon dioxide (CO2) concentration will lead to climate warming. Numerous experiments have found that increased precipitation could promote soil CO2 emissions into the atmosphere, but there is great uncertainty in the magnitude of increased precipitation of this feedback. Here, we assessed the influences of different durations and magnitudes of increased precipitation on soil CO2 efflux across biomes through a meta-analysis. Humid (extremely wet, moderately wet, and slightly wet), temperate, and arid (slight drought, moderate drought and extreme drought) areas were classified according to the Palmer drought severity index (PDSI). Overall, the average experimentally applied precipitation increases of 31.81%, 19.14% and 37.68% significantly stimulated soil CO2 efflux by 12.74%, 13.10% and 14.71%, respectively for experiments from all areas, humid areas, and arid areas. No significant effects were found for temperate areas. Increased precipitation stimulated large soil CO2 efflux in extreme drought areas (PDSI > -3) by 38.09%. Moreover, soil CO2 efflux increased with increasing precipitation intensity but decreased with increasing precipitation duration regardless of the area with different PDSIs. Our results highlight the positive feedback between soil CO2 efflux and increased precipitation in both humid and arid terrestrial ecosystems, which improves our understanding in possible climate change effects on the global carbon cycle. Further efforts should assess the differential effects of various durations and magnitudes of increased precipitation in ecosystems with different wetness conditions.
英文关键词	Climate change Carbon cycle Greenhouse gas Arid areas Humid areas
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000621894500014
WOS关键词	CARBON FLUXES ; WATER CONTENT ; RESPIRATION ; RESPONSES ; PULSES ; TEMPERATURE ; GRASSLAND ; COMMUNITY ; WETLAND ; EVENTS
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/2XILL650/350372
作者单位	[Tan, Siyi; Ni, Xiangyin; Yue, Kai; Liao, Shu; Wu, Fuzhong] Fujian Normal Univ, Sch Geog Sci, Key Lab Humid Subtrop Ecogeog Proc, Minist Educ, Fuzhou 350007, Peoples R China
推荐引用方式 GB/T 7714	Tan, Siyi,Ni, Xiangyin,Yue, Kai,et al. Increased precipitation differentially changed soil CO2 efflux in arid and humid areas[J],2021,388.
APA	Tan, Siyi,Ni, Xiangyin,Yue, Kai,Liao, Shu,&Wu, Fuzhong.(2021).Increased precipitation differentially changed soil CO2 efflux in arid and humid areas.GEODERMA,388.
MLA	Tan, Siyi,et al."Increased precipitation differentially changed soil CO2 efflux in arid and humid areas".GEODERMA 388(2021).