Tree-ring demonstration of ancient trees over 300 years old and 1000 years old in Angren County,Xizang
Due to the harsh habitat in western Xizang(Tibet),it is hard to find old trees with hundreds of years.In the 2023 survey of ancient tree resources in Angren County,the authors found two very ancient trees,Sabina tibetica Juiperus tibetica Kom..One grows in Gandan Takong Temple of Daju Township.Its core sample was close to the pith of the trunk,and its age was identified as 306 years(starting from year 1716)by the dendrochronology method.Another ancient tree,located in Xie Village,Duobai Township,has chest circumference 8.5 meters,and only 12 cm of core samples collected with 216 growth rings,which is estimated to be more than 1,000 years old.The tree-ring data of the two ancient trees not only reflect the regional climate change signal,but also reflect the local niche and people's protection signals of the ancient trees,and show that the ancient trees is currently growing in a healthy state.Our findings enrich the background resource of ancient trees in Angren County,and are of great significance for under-standing the culture,ecology,climate,scientific research and social values of ancient trees in western Xizang.
Ancient tree resourcesHigh elevationCold habitatGrowth history of ancient treesSabina tibetica
NETL
NSTL
万方数据
