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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 | |
| 引用本文： | 王建,赵业思,商志远,白世彪,陈振举,张志刚.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[J].地理科学,2016,36(8):1261-1268. |
| 作者姓名： | 王建 赵业思 商志远 白世彪 陈振举 张志刚 |
| 作者单位： | 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 |
| 基金项目： | 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 |
| 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 |
| 收稿时间： | 2015-08-25 |
| 修稿时间： | 2015-11-04 |
Diverse Stable Carbon Isotope Ratios in Tree-ring Components of Pinus massoniana with Their Climate Sensitivities |
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| Jian Wang,Yesi Zhao,Zhiyuan Shang,Shibiao Bai,Zhenju Chen,Zhigang Zhang.Diverse Stable Carbon Isotope Ratios in Tree-ring Components of Pinus massoniana with Their Climate Sensitivities[J].Scientia Geographica Sinica,2016,36(8):1261-1268. | |
| Authors: | Jian Wang Yesi Zhao Zhiyuan Shang Shibiao Bai Zhenju Chen Zhigang Zhang |
| Institution: | 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 |
| 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. |
| Keywords: | stable carbon isotope tree-ring climate sensitivity component Pinus massoniana |
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