Dendroclimatic response of Picea jezoensis along an altitudinal gradient in Changbai Mountains  

作　　者：G.Geoff Wang 

机构地区：[1]Department of Forestry and Natural Resources,Clemson University,Clemson,South Carolina 29634-0317,USA

出　　处：《Science China(Technological Sciences)》2006年第z1期150-159,共10页中国科学（技术科学英文版）

基　　金：jointly supported by the Overseas Scholar Funding from the Chinese Academy of Sciences(Grant No.C13HK&C13HU);the Opened Research Station of Changbai Mountains Forest Ecosystems and the National Natural Science Foundation of China(Grant Nos.70373044 and 30470302).

摘　　要：We investigated the effects of climate on Yeddo spruce (Picea jezoensis)radial growth along altitudinal gradients in the subalpine forests of Changbai Mountains using dendroclimatic analyses. Yeddo spruce at its lower and upper distribution limits was more sensitive to the climate. Despite precipitation being generally considered sufficient, we found that precipitation significantly affected Yeddo spruce radial growth. Yeddo spruce at its lower distribution limit was much more affected by precipitation while Yeddo spruce at its upper distribution limit was much more affected by minimum temperature. Yeddo spruce at its medial altitude was affected by sunshine ratio. These results demonstrated that climate affected Yeddo spruce growth differently depending on its altitudinal distributions in the Changbai Mountains. Both temperature and precipitation in the annualization period significantly correlated with Yeddo spruce radial growth. However, warmer signals were not reflected in radial growth trend during the past 20 years because annual total precipitation declined during the same period. It appeared that the climate affected tree rings growth by altering soil moisture availability.We investigated the effects of climate on Yeddo spruce (Picea jezoensis) radial growth along altitudinal gradients in the subalpine forests of Changbai Mountains using dendroclimatic analyses. Yeddo spruce at its lower and upper distribution limits was more sensitive to the climate. Despite precipitation being generally considered sufficient, we found that precipitation significantly affected Yeddo spruce radial growth. Yeddo spruce at its lower distribution limit was much more affected by precipitation while Yeddo spruce at its upper distribution limit was much more affected by minimum temperature. Yeddo spruce at its medial altitude was affected by sunshine ratio. These results demonstrated that climate affected Yeddo spruce growth differently depending on its altitudinal distributions in the Changbai Mountains. Both temperature and precipitation in the annu-alization period significantly correlated with Yeddo spruce radial growth. However, warmer signals were not reflected in radial growth trend during the past 20 years because annual total precipitation declined during the same period. It appeared that the climate affected tree rings growth by altering soil moisture availability.

关 键 词：dendrochronology  Yeddo SPRUCE (Piceajezoensis)  ALTITUDE gradient  Changbai Mountains. 

分 类 号：S791[农业科学—林木遗传育种]