文献类型：会议论文

英文题名：Differences in tree and shrub growth responses to climate change in a boreal forest in China

作者：Yang, Jingwen[1,2,3] Cooper, David J.[3] Li, Zongshan[4] Song, Wenqi[1,2] Zhang, Yuandong[5] Zhao, Binqing[1,2] Han, Shijie[6] Wang, Xiaochun[1,2]

第一作者：Yang, Jingwen

通信作者：Wang, XC[1];Wang, XC[2];Han, SJ[3]

机构：[1]Northeast Forestry Univ, Ctr Ecol Res, Sch Forestry, Harbin 150040, Peoples R China;[2]Northeast Forestry Univ, Sch Forestry, Minist Educ, Key Lab Sustainable Forest Ecosyst Management, Harbin 150040, Peoples R China;[3]Colorado State Univ, Dept Forest & Rangeland Stewardship, Ft Collins, CO 80523 USA;[4]Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China;[5]Chinese Acad Forestry, Res Inst Forest Ecol Environm & Protect, Key Lab Forest Ecol & Environm Natl Forestry & Gr, Beijing 100091, Peoples R China;[6]Henan Univ, Dept Life Sci, State Key Lab Cotton Biol, Kaifeng 475001, Peoples R China

会议论文集：International Conference on Tree Rings in Archaeology, Climatology and Ecology (TRACE)

会议日期：MAY 08-11, 2019

会议地点：Caserta, ITALY

语种：英文

外文关键词：Shrub; Trees; Climate warming; Tree rings; Radial growth; Boreal forest

年份：2020

摘要：Global climate change has led to rising temperatures and drought in boreal forests in Northeast China. In some areas, shrubs and trees coexist in high altitude and high latitude areas, and their differences with global warming may lead to significant changes in vegetation composition and distribution. Therefore, we compared the relationships between climate and growth for the most widely distributed dwarf shrub (Punts pumila) and the two dominant tree species (Larbc gmelinii and Pinus sylvestris var. mongolica) in boreal forests in the Daxing'an Mountains, China. A total of 340 tree-ring cores from 172 trees and 64 discs from shrubs were collected from four sites and compared the responses of shrub and tree growth to climate patterns using dendrochronological methods. The shrub and two tree species responded differently to interannual climate variance. The negative effect of growing season temperature was greater on growth of L.gmelinii and P. sylvestrisvar.mongolica than on P. pumila, and the promoting effect of winter and spring precipitation was greatest on P. pumila. Compared with the two tree species, P. pumila had a higher temperature threshold and grew over a shorter growing season. Our findings suggested that L. gmelinii and P. sylvestrisvar.mongolica are more susceptible to global warming than the shrubs that coexist with them. However, P.pumila should be studied from an individual perspective in the future due to the dwarf morphology of shrubs and their complex microenvironment.