欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报

• 研究报告 • 上一篇    下一篇

大兴安岭北部樟子松树轮δ13C的高向变化及其与树轮宽度的关系

商志远1**,王建1,张文1,2,李彦彦1,崔明星3,4,陈振举4,赵兴云5,6   

  1. (1南京师范大学地理科学学院, 南京 210023;  2山西农业大学信息学院, 山西太谷 030800; 3中国科学院东北地理与农业生态研究所, 长春 130012; 4中国科学院沈阳应用生态研究所, 沈阳 110016; 5山东省水土保持与环境保育重点实验室, 山东临沂 276000; 6临沂大学资源环境学院, 山东临沂 276000)
  • 出版日期:2013-01-18 发布日期:2013-01-18

Vertical  variability of Pinus sylvestris var. mongolica tree ring δ13C and its relationship with tree ring width in northern Daxing’an Mountains of Northeast China.

SHANG Zhi-yuan1, WANG Jian1, ZHANG Wen1,2, LI Yan-yan1, CUI Ming-xing3,4, CHEN Zhen-ju4, ZHAO Xing-yun5,6   

  1. (1College of Geographical Science, Nanjing Normal University, Nanjing 210023, China; 2College of Information, Shanxi Agricultural University, Taigu 030800, Shanxi, China; 3Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China; 4Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 5Shandong Province Key Laboratory of Water and Soil Conservation and Environmental Protection, Linyi 276000, Shandong, China; 6College of Resources and Environment, Linyi University, Linyi 276000, Shandong, China)
  • Online:2013-01-18 Published:2013-01-18

摘要:

通过对大兴安岭北部樟子松树轮样品高向的年轮宽度和稳定碳同位素比率(δ13C)进行测定,分析了高向上δ13C的变化特征及其与年轮宽度的关系.结果表明: 在木质部全轮、早材和树皮内皮3种成分中,样品高向δ13C均呈现由顶部至基部先显著增加,在冠层底部达到最大值,再向下迅速减少至谷值的变化趋势.早晚材平均宽度比由基部至顶部增大.高向上δ13C年均值序列与轮宽年均值序列呈现较为明显的反向对应关系,与早晚材宽度比年均值序列呈现在冠层以上较为一致的变化趋势.样本高向上年轮宽度序列及δ13C序列均存在不同程度的显著差异,δ13C值的高向变化与年际变化基本处于同一量级.树体高向δ13C序列逐年变化趋势基本一致,同一高度盘的δ13C序列与年轮宽度序列基本呈负相关,但不同高度的显著性有所差异.

 

Abstract: A measurement was made on the vertical direction tree ring stable carbon isotope ratio (δ13C) and tree ring width of Pinus sylvestris var. mongolica in northern Daxing’an Mountains of Northeast China, with the relationship between the vertical direction variations of the tree ring δ13C and tree ring width analyzed. In the whole ring of xylem, earlywood (EW) and bark endodermis, the δ13C all exhibited an increasing trend from the top to the base at first, with the maximum at the bottom of tree crown, and then, decreased rapidly to the minimum downward. The EW and latewood (LW) had an increasing ratio of average tree ring width from the base to the top. The average annual sequence of the δ13C in vertical direction had an obvious reverse  correspondence  with the average annual sequence of tree ring width, and had a trend comparatively in line with the average annual sequence of the tree ring width ratio of EW to LW above tree crown. The variance analysis showed that there existed significant differences in the sequences of tree ring δ13C and ring width in vertical direction, and the magnitude of vertical  δ13C variability was basically the same as that of the interannual δ13C variability. The yeartoyear variation trend of the vertical  δ13C sequence was approximately identical. For each sample, the δ13C sequence at the same heights was negatively correlated with the ring width sequence, but the statistical significance differed with tree height.