干旱区生态环境知识资源中心(Arid): Aboveground net primary productivity and soil respiration display different responses to precipitation changes in desert grassland

Arid

DOI	10.1093/jpe/rtab067
	Aboveground net primary productivity and soil respiration display different responses to precipitation changes in desert grassland
	Zhang, Lihua; Wang, Junfeng; Zhao, Ruifeng; Guo, Yafei; Hao, Lianyi; Hu, Zhongmin
通讯作者	Zhang, LH (corresponding author)，Northwest Normal Univ, Coll Geog & Environm Sci, 967 Anning East Rd, Lanzhou 730070, Peoples R China.
来源期刊	JOURNAL OF PLANT ECOLOGY
ISSN	1752-9921
EISSN	1752-993X
出版年	2022
卷号	15 期号:1 页码:57-70
英文摘要	Precipitation (PPT) changes affect both aboveground vegetation dynamics and belowground carbon cycling processes, particularly in arid and semiarid regions. However, it remains unclear how extreme PPT variation can affect soil carbon sequestration potential. A 3-year PPT manipulation experiment with five levels (+/- 40%, +/- 20% and ambient PPT) was conducted in a desert grassland of western Loess Plateau. Aboveground net primary productivity (ANPP) and soil respiration (Rs) were measured to examine whether the responses of ANPP and Rs to PPT changes displayed a double asymmetry model. The ANPP was more sensitive to extreme drought than extreme wet treatments in wet and dry years, which displayed a negative asymmetric model. The change in ANPP was mainly due to the direct effect of PPT change, and plant density variation also exerted some influence in the dry year. In contrast, Rs displayed a positive asymmetry response to PPT change in dry year. This may be ascribed to enhanced autotrophic respiration due to the enhanced positive responses of plant growth and ANPP to wet treatments as well as stronger birch effect of rainfall events on heterotrophic respiration. The saturating response of Rs to extreme drought (-40% PPT treatment) was also found in the dry year. Nevertheless, the response of Rs to PPT change displayed a negative asymmetry model in wet years. The contrasting models for ANPP and Rs in response to altered PPT regime suggest that extreme wet or dry treatments may increase soil C pools effluxes toward debt in this desert grassland.
英文关键词	primary production plant growth soil respiration soil carbon balance extreme precipitation desert grassland asymmetry response
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000759083500005
WOS关键词	TERRESTRIAL ECOSYSTEMS ; EXTREME PRECIPITATION ; SPECIES-DIVERSITY ; GROWING-SEASON ; CARBON STORAGE ; PLANT COVERAGE ; BIOMASS ; DYNAMICS ; RAINFALL ; CLIMATE
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376386
作者单位	[Zhang, Lihua; Wang, Junfeng; Zhao, Ruifeng; Guo, Yafei; Hao, Lianyi; Hu, Zhongmin] Northwest Normal Univ, Coll Geog & Environm Sci, 967 Anning East Rd, Lanzhou 730070, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Lihua,Wang, Junfeng,Zhao, Ruifeng,et al. Aboveground net primary productivity and soil respiration display different responses to precipitation changes in desert grassland[J],2022,15(1):57-70.
APA	Zhang, Lihua,Wang, Junfeng,Zhao, Ruifeng,Guo, Yafei,Hao, Lianyi,&Hu, Zhongmin.(2022).Aboveground net primary productivity and soil respiration display different responses to precipitation changes in desert grassland.JOURNAL OF PLANT ECOLOGY,15(1),57-70.
MLA	Zhang, Lihua,et al."Aboveground net primary productivity and soil respiration display different responses to precipitation changes in desert grassland".JOURNAL OF PLANT ECOLOGY 15.1(2022):57-70.