Welcome to visit Scientia Silvae Sinicae,Today is

Scientia Silvae Sinicae ›› 2013, Vol. 49 ›› Issue (6): 1-9.doi: 10.11707/j.1001-7488.20130601

Previous Articles     Next Articles

Orientation Difference of Tree Ring δ13C Response to Climatic Factors for Pinus sylvestris var. mongolica

Shang Zhiyuan1, Wang Jian1, Zhao Xingyun2,3, Zhang Maoheng1, Cui Mingxing4, Chen Zhenju5,6   

  1. 1. College of Geographical Science, Nanjing Normal University Nanjing 210023;
    2. Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protections Linyi 276000;
    3. College of Resources and Environment, Linyi University Linyi 276000;
    4. China Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences Changchun 130102;
    5. Forestry College, Shenyang Agricultural University Shenyang 110866;
    6. Institute of Applied Ecology, Chinese Academy of Sciences Shenyang 110164
  • Received:2012-05-02 Revised:2013-05-07 Online:2013-06-25 Published:2013-07-16

Abstract:

Through investigation of the stable carbon isotope ratio (δ13C) of discs which were sampled from three 15-year-old trees in the north part of Daxing'anling Mountain, we analyzed the orientation variation in tree ring δ13C in response to climate factors and influence of sampling orientations and the sample combinations on the circumferential representative. The result showed that the impact of regional climate and environment factors on the variation in tree ring δ13C was consistent. It was found that most of the correlations between the tree ring δ13C sequences were positive, but some were negative. The sequences with significant correlation usually exhibited symmetrical or obtuse-angled distribution. The capability and extent of tree ring δ13C extracting the climate factors varied obviously among different orientations which accounted for the responses of different orientations to climate factors. The result suggests that 3 orientations provide the best and most efficient choice for extracting the information of tree ring δ13C. Sampling should avoid boring in one direction only, but should also include transversal angles.

Key words: tree rings, δ13C, orientation difference, climatic factors, response, Pinus sylvestris var. mongolica

CLC Number: