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	Age-mediation of tree-growth responses to experimental warming in the northeastern Tibetan Plateau
	Du, Jun1,2; Li, Kai3,4; He, Zhibin1,2; Chen, Longfei1,2; Zhu, Xi1,2,5; Lin, Pengfei1,2,5
刊名	ECOLOGY AND EVOLUTION
	2019-02-01
卷号	9期号:4页码:2242-2254
关键词	age mediation experimental warming phenology sapling growth Tibetan Plateau
ISSN号	2045-7758
DOI	10.1002/ece3.4920
通讯作者	He, Zhibin(hzbmail@lzb.ac.cn)
英文摘要	The trajectory of tree-growth response to climate warming may be related to attributes like tree age. However, age-mediation of temperature sensitivity of tree growth has received little attention. This study aimed to determine how age affects tree growth in a future warmer world. In a 2-year ecosystem warming experiment in the northeastern Tibetan Plateau of China, we explored the response of Qinghai spruce saplings at two life stages to two warming levels. Our results indicated a significant interaction between warming and age for sapling growth of Qinghai spruce. In high-level warming scenario, the experiment increased growing season air temperatures by approximately 1.0 degrees C and annual growing degree-days by 38%. In response, warmed saplings lengthened the growing season by 10days on average and increased the final shoot length to a maximum of 104% compared to control groups. Comparison of age classes revealed that old saplings exhibited significantly higher temperature sensitivity than young saplings. This performance may be caused by the differences in adaptive strategy to the asymmetric warming occurring during the whole day. Increased daytime temperature was expected to significantly enhance leaf photosynthesis, whereas lack of obvious nighttime warming would effectively restrict autotrophic respiration, thus resulting in the higher growth rate of old saplings compared with young saplings. Moreover, lack of nighttime warming rendered young saplings to be still in high stresses of freezing injury at low temperatures. These findings highlight the need for additional research on the effects of further climate anomalies on tree species during their ontogenetic processes.
收录类别	SCI
WOS关键词	SEMIARID MOUNTAIN REGIONS ; CLIMATE-CHANGE ; PICEA-CRASSIFOLIA ; QILIAN MOUNTAINS ; GREEN-UP ; SPRING PHENOLOGY ; LEAF PHENOLOGY ; GROWING-SEASON ; WHITE SPRUCE ; WOODY-PLANTS
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology
WOS类目	Ecology ; Evolutionary Biology
语种	英语
出版者	WILEY
WOS记录号	WOS:000461114900056
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2555553
专题	寒区旱区环境与工程研究所
通讯作者	He, Zhibin
作者单位	1.Chinese Ecosyst Res Network, Linze Inland River Basin Res Stn, Lanzhou, Gansu, Peoples R China 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou, Gansu, Peoples R China 3.Lanzhou Univ, Coll Earth Environm Sci, Key Lab Western Chinas Environm Syst, Lanzhou, Gansu, Peoples R China 4.Texas Tech Univ, Dept Agr & Appl Econ, Lubbock, TX 79409 USA 5.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Du, Jun,Li, Kai,He, Zhibin,et al. Age-mediation of tree-growth responses to experimental warming in the northeastern Tibetan Plateau[J]. ECOLOGY AND EVOLUTION,2019,9(4):2242-2254.
APA	Du, Jun,Li, Kai,He, Zhibin,Chen, Longfei,Zhu, Xi,&Lin, Pengfei.(2019).Age-mediation of tree-growth responses to experimental warming in the northeastern Tibetan Plateau.ECOLOGY AND EVOLUTION,9(4),2242-2254.
MLA	Du, Jun,et al."Age-mediation of tree-growth responses to experimental warming in the northeastern Tibetan Plateau".ECOLOGY AND EVOLUTION 9.4(2019):2242-2254.

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