气候条件对家燕物候期变化的影响

Influence of Climate Condition on Change of Phenophase of Barn Swallow

利用桂林市迁徙过境家燕的物候期及同期地面气象资料,分析了家燕物候期的变化规律及其对气候变化的响应。结果表明,家燕始见期稳定,绝见期显著推迟,始、绝见间隔期明显延长;影响家燕始见期的主要气象条件为1月平均最高气温,影响其绝见期的主要气象条件为6月份降水量和5月份日照时数,影响其始、绝见间隔期的主要气象条件为6月份降水量;1月份平均最高气温升高可使家燕始见期提前,6月份降水量增多、5月份日照时数增加可使家燕绝见期推迟。

With the phenophase of migrated barn swallow and the surface meteorological data during the same period of Guilin, the changing role of phenophase of barn swallow and its response to climate change were analyzed. The results showed that, the start sight phase （SSP） of barn swallow was stable, but their halting sight phase （HSP） delayed, so the interval of SSP and HSP obviously prolonged. The main meteorological condition that influenced HSP was the averagel highest temperate in January, and that influenced HSP were the precipitation in June and sunshine hours in May, that on interval of SSP and HSP was the precipitation in June. The increase of the average highest temperate in January could advance the SSP of barn swallow, the increase of precipitation in June and the sunshine hours in May could prolong the HSP of barn swallow.