气候变化对不同纬度兴安落叶松径向生长的影响

以大兴安岭地区3个不同纬度地区的兴安落叶松为研究对象,建立不同纬度兴安落叶松年轮宽度年表;探索1967—2005年间,不同纬度气候因子变化规律,对气候因子和年轮宽度年表进行相关性分析。结果表明:1967—2005年间,大兴安岭不同纬度地区温度均显著上升,降水量未呈现出显著性变化;1927—2007年间,高纬度兴安落叶松树木径向生长显著增加,与此相反,中纬度和低纬度地区兴安落叶松径向生长变化不明显;温度是影响兴安落叶松径向生长的主要因子,降水变化对兴安落叶松径向生长的影响较小;高纬度地区气候变暖后,降水量的下降抑制了该地区兴安落叶松的径向生长。

Effeet of Chinate Change on Larix gmelinii Growth in Different Latitudes

We used Larix gmelinii at three different latitudes in Daxing ’ an Montains to build the chronology tree-ring width at different latitudes , explored the change regulation of climate factor at different latitude in 1967-2005 , and then conducted a correlation analysis between climate factor and tree-ring width. The temperature showed a significant increasing trend at different latitudes in Daxing ’ an Montains in 1967-2005 , but the precipitation did not show a significant change at all lati-tudes.The standard chronology of high latitude showed the significant increasing trend of trees growth in 1927-2007, the growth of mid-latitudes and low latitudes area did not change significantly over the entire time .The temperature was the main factor affecting tree growth than precipitation .With the increase of climate warming , the tree ring growth was sup-pressed by reduced precipitation in high latitude region .