辽河三角洲地区植物物候对气候变暖的响应(英文)

Response of Plant Phenology to Climate Warming in Liaohe River Delta

在分析辽河三角洲地区1989～2009年小叶杨春秋两季的物候变化特征的基础上,建立了物候期差异与温度变化之间的关系模式,分析了当前气候变化背景下,物候期对温度变化和界限温度通过日期变化的响应关系。结果表明,近21年辽河三角洲地区春季物候期略有提早,但趋势特征不明显,春季物候期的变化主要受气温波动的制约,且两者之间的关系是非线性的;秋季物候期呈明显推迟趋势,秋季物候期的早晚主要是由气温降到一定指标的时间决定的。

Based on the analysis of phenological variation characters of Populus simonii in spring and autumn in Liaohe River Delta during 1989-2009,the relationship model between phenophase difference and temperature variation was constructed,and the responses of phenophase to the changes of temperature and critical temperature duration were analyzed under the background of climate change.The results showed that spring phenophase in Liaohe River Delta in recent 21 years occurred a little earlier without obvious trend feature,and spring phenophase change was mainly affected by temperature fluctuation,with the nonlinear relationship between them.Meanwhile,autumn phenophase was significantly delayed and mainly determined by the time of temperature dropped to a certain index.