Varying soil respiration under long-term warming and clipping due to shifting carbon allocation toward below-ground

doi:10.1016/j.agrformet.2021.108408

	Varying soil respiration under long-term warming and clipping due to shifting carbon allocation toward below-ground
	Yan, Yingjie 1,2,3; Quan, Quan 1,2,3; Meng, Cheng 1; Wang, Jinsong 1; Tian, Dashuan 1; Wang, Bingxue 1; Zhang, Ruiyang 1; Niu, Shuli 1,2,3
刊名	AGRICULTURAL AND FOREST METEOROLOGY
	2021-07-15
卷号	304 页码:9
关键词	Climate warming Biofuel harvest Soil respiration Net primary productivity Carbon allocation
ISSN号	0168-1923
DOI	10.1016/j.agrformet.2021.108408
通讯作者	Niu, Shuli(sniu@igsnrr.ac.cn)
英文摘要	Global warming and land-use change have profound impacts on soil respiration (R-s), with consequent changes in carbon exchange between terrestrial ecosystem and atmosphere and its feedback to climate change. However, it is not clear how soil respiration and its components (heterotrophic respiration, R-h; and autotrophic respiration, R-a) respond to long-term warming and clipping in alpine meadow, and what are the controlling factors for the responses of soil respiration. To answer these questions, we conducted a field experiment of warming and clipping in an alpine meadow on the Qinghai-Tibet Plateau from 2014 to 2019. Infrared heaters were used to simulate climate warming and plots were clipped once a year to mimic hay or biofuel harvest. The results showed that warming decreased R-h by 5.06% but stimulated R-a by 10.08% across years, while clipping enhanced R-s, R-h and R-a by 12.31%, 18.65% and 1.29%, respectively, and marginally interacted with warming in impacting R-a across the years. Furthermore, the warming effect on soil respiration and its components varied largely over years, which was mostly attributable to the changes in the ratio of above-ground to below-ground net primary productivity (ANPP/BNPP, A/B) and soil temperature. Increased allocation of photosynthate toward below-ground caused the gradual increase in R-a and R-s under long-term warming. While soil temperature changes explained the variation of warming effects on R-h across years. The results demonstrated that soil respiration and its components in the alpine meadow are highly sensitive to climate warming and hay harvest but with large interannual variations in their responses. We highlight that plant carbon allocation is an emerging property in determining soil respiration under climate warming.
资助项目	National Natural Science Foundation of China[31988102] ; National Natural Science Foundation of China[31625006] ; Chinese Academy of Sciences[XDA23080302]
WOS关键词	NET PRIMARY PRODUCTIVITY ; GLOBAL CLIMATE-CHANGE ; INTERANNUAL VARIABILITY ; TEMPERATURE SENSITIVITY ; AUTOTROPHIC RESPIRATION ; TERRESTRIAL ECOSYSTEMS ; ORGANIC-CARBON ; CYCLE FEEDBACK ; PLANT BIOMASS ; CO2 EFFLUX
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000652014300025
资助机构	National Natural Science Foundation of China ; Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/163931]
专题	中国科学院地理科学与资源研究所
通讯作者	Niu, Shuli
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Dept Ecol, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Dept Environm, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Yan, Yingjie,Quan, Quan,Meng, Cheng,et al. Varying soil respiration under long-term warming and clipping due to shifting carbon allocation toward below-ground[J]. AGRICULTURAL AND FOREST METEOROLOGY,2021,304:9.
APA	Yan, Yingjie.,Quan, Quan.,Meng, Cheng.,Wang, Jinsong.,Tian, Dashuan.,...&Niu, Shuli.(2021).Varying soil respiration under long-term warming and clipping due to shifting carbon allocation toward below-ground.AGRICULTURAL AND FOREST METEOROLOGY,304,9.
MLA	Yan, Yingjie,et al."Varying soil respiration under long-term warming and clipping due to shifting carbon allocation toward below-ground".AGRICULTURAL AND FOREST METEOROLOGY 304(2021):9.