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不同纬度阔叶红松林红松径向生长对气候因子的响应

刘敏1,2,毛子军1*,厉悦2,孙涛1,李兴欢1,黄唯1,刘瑞鹏1,李元昊2
  

  1. (1东北林业大学森林植物生态学教育部重点实验室, 哈尔滨 150040; 2齐齐哈尔大学, 黑龙江齐齐哈尔 161006)
  • 出版日期:2016-05-18

Response of  radial growth of Pinus koraiensis in broad-leaved Korean pine forests with different latitudes to climatical factors.

LIU Min1,2, MAO Zi-jun1*, LI Yue2, SUN Tao1, LI Xing-huan1, HUANG Wei1, LIU Rui-peng1, LI Yuan-hao2#br#   

  1. (1Ministry of Education Key Laboratory of Forest Plant Ecology, Northeast Forestry University, Harbin 150040, China; 2Qiqihar University, Qiqihar 161006, Heilongjiang, China).
  • Online:2016-05-18

摘要:

运用树木年轮气候学方法,研究了不同纬度阔叶红松林红松径向生长趋势及其与气候因子的关系,以期揭示不同纬度红松径向生长对气候因子响应的差异以及气候变化影响下红松的动态特征、适应性及敏感性.结果表明: 不同纬度红松径向生长对当地气候因子的响应存在差异,最南部的白石砬子自然保护区红松径向生长与生长季的平均相对湿度呈显著正相关,与平均最高气温呈显著负相关.中部的长白山自然保护区的低海拔区域红松径向生长与生长季的水分因子(降水、相对湿度和帕尔默干旱指数PDSI)呈显著正相关,而与平均最高气温呈显著负相关;凉水自然保护区红松径向生长与生长季的水分因子(相对湿度和PDSI)呈显著正相关,与气温因子(平均气温和平均最高气温)呈显著负相关.而最北部的胜山自然保护区红松径向生长则与大部分月份的气温因子呈显著正相关.当年6月气候因子是影响所有纬度红松径向生长的关键气候因子,4个样地都与当年6月平均最高气温呈显著负相关.在气温不断上升的近40年,最南部的红松径向生长呈显著下降趋势,最北部呈显著上升趋势,中部的变化不显著.如果未来气温升高而降水不变,红松分布区可能缩小.
 

关键词: 红松, 树木年轮, 纬度, 气候变化

Abstract: To reveal the radial growth trends of Pinus koraiensis and the  differences in their responses to climate factors among different latitudes, and to assess the dynamic characteristics, adaptability and sensitivity of P. koraiensis under the influence of climate change, dendrochronological techniques were used to study the relationships between the climatic variables and the radial growth of P. koraiensis in broadleaved Korean pine forests with different latitudes. The results showed that there were differences in the responses of the radial growth of P. koraiensis in four different latitudes to local climatic factors. In Baishilazi Nature Reserve, the southernmost sample plot, the radial growth of P. koraiensis was significantly positively correlated to the average relative humidity but significantly negatively correlated to the average maximum temperature of growing season. In low altitude of Changbai Mountain Nature Reserve, the intermediate sample plot, it was significantly positively correlated with precipitation, average relative humidity and PDSI, and significantly negatively correlated with the average maximum temperature in growing season. In Liangshui Nature Reserve, the intermediate sample plot, significantly positive correlations occurred for average relative humidity and PDSI in growing season, while significantly negative correlations occurred for the average temperature and the average maximum temperature in growing season. Nevertheless, in Shengshan Nature Reserve, the northernmost sample plot, it was positively correlated to the temperature factors of most months. The climatic variables in June of current year were the main factors limiting the radial growth of P. koraiensis in all latitudes, and the average maximum temperature in June of current year was highly negatively correlated with radial growth for P. koraiensis measured at all sites. In recent four decades, with the rising of temperature, the radial growth of P. koraiensis decreased significantly in the southernmost point, increased significantly in the northernmost point, and did not change significantly in middle latitudes. The distribution area of P. koraiensis would be reduced if the temperature increased and precipitation remained unchanged in the future.

Key words: Pinus koraiensis, climate change., tree ring, latitude