干旱区生态环境知识资源中心(Arid): Water relations of "trailing-edge" evergreen oaks in the semi-arid upper Yangtze region,SE Himalaya

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	Water relations of "trailing-edge" evergreen oaks in the semi-arid upper Yangtze region,SE Himalaya
	He Xiaofang; Wang Songwei; Sun Hang; Korner Christian; Yang Yang
来源期刊	Journal of Systematics and Evolution
ISSN	1674-4918
出版年	2021
卷号	59 期号:6 页码:1256-1265
英文摘要	Unlike the well-understood cold limit of trees,the causes of the dry trailing edge of trees await explanation.Here we aimed at explaining the drought limit of an evergreen oak species (Quercus pannosa s.l.) in a typical dry valley of the upper Yangtze region,SE Himalaya,where rains (ca.250 mm/a) are largely confined to the typical monsoon season (July-August) with drought during the remaining 9-10 months.We capitalized on an unintentional year-round irrigation treatment with trees growing along the overflow of a water reservoir serving as moist controls.We measured shoot water potential (Psi),leaf conductance (g),flushing phenology,leaf mass per area (LMA),foliar and stem delta~(13)C,leaf nutrients,and non-structural carbohydrates across the transition from non-monsoon to monsoon season,from April to August 2018.At the dry site,psi and g were high during the monsoon but declined to<-3 MPa as drought proceeded in the non-monsoon season.Irrigated oaks retained high values year-round.Oaks experiencing the natural drought flushed at the full strength onset of the monsoon only,that is,80 days later than irrigated oaks.The annual shoot increment in oaks under natural drought was ca.10% of that in irrigated oaks.However,mature foliage showed no difference in LMA and delta~(13)C between dry and moist sites.We conclude that these oaks drastically reduce their activity in response to drought,with growth strictly confined to the monsoon season,the minimum duration of which,presumably is setting the range limit.
英文关键词	adaptation Himalaya monsoon climate Quercus species distribution water stress
类型	Article
语种	英语
收录类别	CSCD
WOS类目	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:7100975
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377466
作者单位	He Xiaofang, Kunming Institute of Botany,Chinese Academy of Sciences;;University of Chinese Academy of Sciences, Key Laboratory for Plant Diversity and Biogeography of East Asia,Chinese Academy of Sciences;;, Kunming;;, ;;Beijing 650201;;100049.; Wang Songwei, Institute of Botany,University of Basel, Basel, 4056, Switzerland.; Korner Christian, Institute of Botany,University of Basel, Basel, 4056, Switzerland.; Sun Hang, Kunming Institute of Botany,Chinese Academy of Sciences, Key Laboratory for Plant Diversity and Biogeography of East Asia,Chinese Academy of Sciences, Kunming, Yunnan 650201, China.; Yang Yang, Kunming Institute of Botany,Chinese Academy of Sciences, Key Laboratory for Plant Diversity and Biogeography of East Asia,Chinese Academy of Sciences, Kunming, Yunnan 650201, China.
推荐引用方式 GB/T 7714	He Xiaofang,Wang Songwei,Sun Hang,et al. Water relations of "trailing-edge" evergreen oaks in the semi-arid upper Yangtze region,SE Himalaya[J],2021,59(6):1256-1265.
APA	He Xiaofang,Wang Songwei,Sun Hang,Korner Christian,&Yang Yang.(2021).Water relations of "trailing-edge" evergreen oaks in the semi-arid upper Yangtze region,SE Himalaya.Journal of Systematics and Evolution,59(6),1256-1265.
MLA	He Xiaofang,et al."Water relations of "trailing-edge" evergreen oaks in the semi-arid upper Yangtze region,SE Himalaya".Journal of Systematics and Evolution 59.6(2021):1256-1265.