黑龙江省兴安落叶松和红松的生态地理分布变化

摘要

利用1961～2005年黑龙江逐日气象资料,采用半峰宽(PWH)计算法,研究近46年来黑龙江省兴安落叶松和红松的生态地理分布界限的变化.结果表明,以1990年为界,兴安落叶松的适宜分布区出现了明显的向北收缩趋势,原因是分布区的水热条件发生了变化;红松的适宜分布区几乎向北扩展了1°,主要原因是热量条件发生了变化.%According to the daily meteorological data in Heilongjiang Province from 1961 to 2005, the peak width at half height method was a-dopted to study the eco-geographical changes of Larix gmelinii and Pinus koraiensis during recent 46 years. As indicated by the results, after 1990, the suitable distributing region of Larix gmelinii showed obvious tendency of moving northwards under the change of temperature and rainfall conditions. Due to the changes of thermal condition, the suitable distributing regions of Pinus koraiensis moved 1° northward.