地理科学 ›› 2016, Vol. 36 ›› Issue (8): 1261-1268.doi: 10.13249/j.cnki.sgs.2016.08.018

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马尾松树轮不同组分稳定碳同位素的差异及其对气候变化响应的初步研究

王建1(), 赵业思1,2(), 商志远1, 白世彪1, 陈振举3, 张志刚1   

  1. 1. 南京师范大学地理科学学院,江苏 南京210023
    2. 南京大学地理与海洋科学学院,江苏 南京 210023
    3. 沈阳农业大学林学院,辽宁 沈阳 110866
  • 收稿日期:2015-08-25 修回日期:2015-11-04 出版日期:2016-08-20 发布日期:2016-08-20
  • 作者简介:

    作者简介:王建(1962-),男,山东昌邑人,教授,博士,主要从事地表过程和环境变迁研究。E-mail: jwang169@vip.sina.com

  • 基金资助:
    国家自然科学基金项目(41271204),江苏省地理信息资源开发与利用协同创新中心和江苏高校优势学科建设工程项目(164320H116)资助

Diverse Stable Carbon Isotope Ratios in Tree-ring Components of Pinus massoniana with Their Climate Sensitivities

Jian Wang1(), Yesi Zhao1,2(), Zhiyuan Shang1, Shibiao Bai1, Zhenju Chen3, Zhigang Zhang1   

  1. 1. School of Geography Science, Nanjing Normal University, Nanjing 210023, Jiangsu, China
    2. School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, Jiangsu, China
    3. College of Forestry, Shenyang Agricultural University, Shenyang 110866, Liaoning, China
  • Received:2015-08-25 Revised:2015-11-04 Online:2016-08-20 Published:2016-08-20
  • Supported by:
    National Natural Science Foundation of China (41271204), Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Key Project for Leading Disciplines of Jiangsu High Learning Institutions(164320H116)

摘要:

比较了中国东南地区九岭山和九连山两地马尾松(Pinus massoniana)树轮不同组分δ13C对气候变化响应的敏感性,结果表明:α纤维素δ13C和综纤维素δ13C在均数方面较全木δ13C分别偏正1.170‰±0.168‰和1.211‰±0.121‰;3种组分δ13C年际变化序列显著正相关(p < 0.001);两地生长季中晚期水分状况是制约马尾松树轮δ13C的主要因子,3种组分δ13C与此时段的气候要素相关性均达到显著水平(p<0.05),3种组分δ13C对气候变化响应的敏感性没有显著差异。

关键词: 稳定碳同位素, 树轮, 气候响应, 组分, 马尾松

Abstract:

It has been proved that stable carbon isotope ratio(δ13C)of tree-ring is an excellent physical proxy for climatic reconstruction in warm and moist regions. However, since wholewood, the raw material of tree-ring, is composed by different chemical components and it is still uncertain which component contains the most stronger climate signal in its δ13C. In this study, climate sensitivities of δ13C in wholewood, holocellulose and α-cellulose were compared in Pinus massoniana from mountains of Jiuling and Jiulian in southeastern China. Results indicated that δ13C of α-cellulose and holocellulose were enriched by 1.211±0.121‰ and 1.170‰±0.168‰ compared with the whole wood respectively; δ13C series of the three components demonstrated high coherence with significant positive correlation coefficients (p<0.001); Hydroclimatic conditions during the middle to late growing season were both the dominated climatic factors limiting δ13C variations in the two study areas and δ13C of the three components all significantly correlated with these climatic factors(p<0.05)without obviously differences. Therefore, it can be concluded that δ13C of tree-ring whole wood in Pinus massoniana is good enough to be used in the climatic reconstruction at an annual or even longer time scale and holocellulose or α-cellulose extraction unnecessary during the studies about stable isotopes in tree-ring of Pinus massoniana.

Key words: stable carbon isotope, tree-ring, climate sensitivity, component, Pinus massoniana

中图分类号: 

  • P932