Field evidences for the positive effects of aerosols on tree growth

doi:10.1111/gcb.14339

	Field evidences for the positive effects of aerosols on tree growth
	Wang, Xin 1; Wu, Jin 2; Chen, Min 3,4; Xu, Xiangtao 5; Wang, Zhenhua 1; Wang, Bin 1; Wang, Chengzhang 1; Piao, Shilong 6; Lin, Weili 7; Miao, Guofang 8; Deng, Meifeng 1; Qiao, Chunlian 1; Wang, Jing 1; Xu, Shan 1; Liu, Lingli1
	2018
发表期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
卷号	24 期号:10 页码:4983-4992
摘要	Theoretical and eddy covariance studies demonstrate that aerosol-loading stimulates canopy photosynthesis, but field evidence for the aerosol effect on tree growth is limited. Here, we measured in situ daily stem growth rates of aspen trees under a wide range of aerosol-loading in China. The results showed that daily stem growth rates were positively correlated with aerosol-loading, even at exceptionally high aerosol levels. Using structural equation modeling analysis, we showed that variations in stem growth rates can be largely attributed to two environmental variables covarying with aerosol loading: diffuse fraction of radiation and vapor pressure deficit (VPD). Furthermore, we found that these two factors influence stem growth by influencing photosynthesis from different parts of canopy. Using field observations and a mechanistic photosynthesis model, we demonstrate that photosynthetic rates of both sun and shade leaves increased under high aerosol-loading conditions but for different reasons. For sun leaves, the photosynthetic increase was primarily attributed to the concurrent lower VPD; for shade leaves, the positive aerosol effect was tightly connected with increased diffuse light. Overall, our study provides the first field evidence of increased tree growth under high aerosol loading. We highlight the importance of understanding biophysical mechanisms of aerosol-meteorology interactions, and incorporating the different pathways of aerosol effects into earth system models to improve the prediction of large-scale aerosol impacts, and the associated vegetation-mediated climate feedbacks.
关键词	aerosol loading aerosol-meteorology interactions canopy photosynthesis diffuse radiation mechanistic photosynthesis model sun shade leaf tree stem growth vapor pressure deficit
学科领域	Biodiversity Conservation ; Ecology ; Environmental Sciences
DOI	10.1111/gcb.14339
收录类别	SCI
语种	英语
WOS关键词	NET PRIMARY PRODUCTIVITY ; ATMOSPHERIC PARTICLES ; STOMATAL CONDUCTANCE ; DIFFUSE-RADIATION ; OAK FOREST ; CO2 FLUX ; PHOTOSYNTHESIS ; CLOUDS ; VARIABILITY ; CANOPY
WOS记录号	WOS:000445728800040
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2486
资助机构	Chinese National Key Development Program for Basic Research [2014CB954003, 2017YFC0503900] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31522011, 31670478, 31600389, 31070430] ; United States Department of EnergyUnited States Department of Energy (DOE) [DE-SC0012704]
作者邮箱	lingli.liu@ibcas.ac.cn
作品OA属性	Bronze, Green Submitted
引用统计	被引频次：60[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/20509
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Brookhaven Natl Lab, Environm & Climate Sci Dept, New York, NY USA 4.Carnegie Inst Sci, Dept Global Ecol, Stanford, CA USA 5.Pacific Northwest Natl Lab, Joint Global Change Res Inst, Richland, WA 99352 USA 6.Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 02138 USA 7.Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing, Peoples R China 8.Minzu Univ China, Coll Life & Environm Sci, Beijing, Peoples R China 9.Univ Illinois, Dept Nat Resources & Environm Sci, Urbana, IL USA
推荐引用方式 GB/T 7714	Wang, Xin,Wu, Jin,Chen, Min,et al. Field evidences for the positive effects of aerosols on tree growth[J]. GLOBAL CHANGE BIOLOGY,2018,24(10):4983-4992.
APA	Wang, Xin.,Wu, Jin.,Chen, Min.,Xu, Xiangtao.,Wang, Zhenhua.,...&Liu, Lingli.(2018).Field evidences for the positive effects of aerosols on tree growth.GLOBAL CHANGE BIOLOGY,24(10),4983-4992.
MLA	Wang, Xin,et al."Field evidences for the positive effects of aerosols on tree growth".GLOBAL CHANGE BIOLOGY 24.10(2018):4983-4992.

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