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天山东西部雪岭云杉径向生长对气候变暖的响应差异
张艳静
学位类型硕士
导师郑宏伟 ; 于瑞德
2017-05-01
学位授予单位中国科学院大学
学位授予地点新疆乌鲁木齐
学位专业理学硕士
关键词树木年轮 雪岭云杉 气候变化 敏感性 响应差异 tree ring Picea schrenkiana climate change sensitivity divergence
摘要To reveal the radial growth trends of Pinus koraiensis and the differences in theirresponses to climate factors among eastern and western Tianshan Mountains, tree-ringwidth Chronologies were developed in upper forest and in lower forest of Zhaosu andHami. According to the normal process of tree ring analysis, tree chronology was attainedusing the software DendroClim2002 和 SPSS to acquire the response and intervals analysisbetween tree ring widths and climatic factors including temperature and precipitation aftercrossdating these samples by Cofecha program and ARSTAN program. The relationshipbetween tree growth and meteorological factors of Picea schrenkiana in upper and lowerforest of eastern and western Tianshan Mountains was studied by climatological method. The results showed that the radial growth of P. schrenkiana in different regions haddifferent response to climatic factors and the sensitivity of P. koraiensis under the influenceof climate warming. Through a large number of data collection and analysis, the resultsshowed several interesting points. First, the statistical characteristics of chronology aremore significant in the region of Zhaosu and more sensitive to climatic factors than that ofradial growth of trees in the region of Hami. Second, the growth of trees in the two regionswas affected by temperature and precipitation. From western to eastern TianshanMountains, the significant positive correlationship was reversed to significant negativebetween tree radial growth and temperature in the lower forest, while the relationshipbetween tree growth and precipitation in the upper forest changed from significant negativecorrelation to significant positive correlation. Furthermore, as the temperature increased, asignificant change was showed in the relationship with climatic factors following the radialgrowth of P. schrenkiana in the lower forest in the region of Zhaosu and the upper and lower forest in the region of Hami. The promoting effect of temperature on the radialgrowth of trees increased significantly in the lower forest of Hami in April, while theinhibitory effect of temperature on the radial growth of trees was significantly increased inin the lower forest of Zhaosu in June. So each respectively, the promoting effects ofprecipitation increased significantly for the radial growth of P. schrenkiana in upper forestin Zhaosu and in the upper and lower forest in Hami in May, June and October. Theprecipitation in upper forest in Zhaosu can meet the growth of trees, while the effect is notsignificant for temperature increase on the relationship between tree growth and climatefactors.
其他摘要为研究雪岭云杉树木生长对不同气象因子的响应状况,选取了天山东西部昭苏和哈密地区的森林上下限的雪岭云杉的树木年轮样本,运用 COFECHA 程序和 ARSTAN程序分别进行交叉定年及建立 2 个地区的标准年表,并利用 SPSS 程序进行相关函数和滑动相关分析,探讨了雪岭云杉树木的生长与温度、降水之间的关系以及气候条件的变化对树木的生长与气候因子的关系的影响。运用树木年轮气候学方法,研究了天山东西部森林上下限雪岭云杉(Picea schrenkiana)树木径向生长与气候因子的关系,以期掲示不同地区雪岭云杉径向生长对气候因子响应的差异及气候变暖影响下雪岭云杉的敏感性。本文得出以下几点结论:(1)昭苏地区树轮年表的统计特征更显著,比哈密地区树木的径向生长对气候因子的响应更敏感;(2)昭苏和哈密的树木的生长均受温度与降水的限制作用,从昭苏到哈密地区,森林下限树木径向生长与气温的相关关系由显著正的相关关系逆转为显著负的相关关系;而森林上限树木的生长与月降水量的相关关系由显著负相关转变为显著正相关;(3)随着温度升高,昭苏森林下限和哈密森林上下限的雪岭云杉径向生长与气候因子的关系均出现了显著变化。快速升温后,4 月温度对哈密森林上限树木径向生长的促进作用显著增加,6 月温度对昭苏下限树木生长的抑制作用显著增加;而 5,6 和 10 月降水分别对昭苏森林上限和哈密森林上下限雪岭云杉径向生长的促进作用显著增加。昭苏森林上树限的降水能够满足树木的径向生长,温度的升高对树木的生长与气候因子关系的影响较小。
学科领域自然地理学
语种中文
文献类型学位论文
条目标识符http://ir.xjlas.org/handle/365004/14912
专题研究系统_荒漠环境研究室
作者单位中国科学院新疆生态与地理研究所
第一作者单位中国科学院新疆生态与地理研究所
推荐引用方式
GB/T 7714
张艳静. 天山东西部雪岭云杉径向生长对气候变暖的响应差异[D]. 新疆乌鲁木齐. 中国科学院大学,2017.
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