气候对亚马尔半岛北部森林生态区树龄结构的影响

V.Ya. Bessonova, V. Kukarskih, N. Devi, Ivan Surkov, Aleksandr Surkov, Lyudmila Gorlanova, R. Hantemirov
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摘要

本文研究了亚马尔半岛北部树线生态区森林-苔原群落的时空动态。论文介绍了对 12 个样地和 1000 多棵西伯利亚落叶松和西伯利亚云杉的调查结果。根据交叉定年的树环年表,获得了过去 150 年间林分的年龄结构和动态变化。北部树线生态区林分的动态过程在疏林区最为明显,自 20 世纪中叶以来,疏林区的林分密度急剧增加。树木成林时间与气候变量工具观测值的相关性分析表明,不同林分类型中落叶松和云杉新个体的成林时间受 6-8 月降水量的显著影响。
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Climatic influence on the age structure of tree stands in ecotone of the northern treeline on the Yamal Peninsula
The spatial and temporal dynamics of forest-tundra communities was studied on the Yamal Peninsula within the northern treeline ecotone. The paper presents the results of surveying 12 sample plots and more than 1000 trees of Siberian larch and Siberian spruce. Based on cross-dated tree-ring chronologies, the age structure and dynamics of stands for the last 150 years were obtained. Dynamic processes in stands of the northern treeline ecotone are most pronounced in the sparse forests, where there has been a sharp increase in stand density since the middle of the 20th century. Correlation analysis of tree establishment time with instrumental observations of climatic variables showed that the establishment of new larch and spruce individuals in different stand types is significantly influenced by the amount of precipitation in June-August.
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