摘要
对大山雀（Ｐａｒｕｓｍａｊｏｒ）和沼泽山雀（Ｐ．ｐａｌｕｓｔｒｉｓ）巢地选择中１７个生态因子作了比较研究．通过逐步判别分析得知：两种山雀在９个环境因子中都以平均树高（ｙ２）、中心上层植物盖度（ｙ４）和树种多样性（ｙ５）三个生态因子判别力最强，为主要环境因子；两种山崔在８个洞因子中都以洞口短径（ｘ２）、洞口内径（ｘ５）和洞底短径（ｘ８）三个生态因子判别力最强，为主要洞因子．在巢地选择中洞因子比环境因子相对重要（ｘ２＝２６．２２＞１３．９９）．两种山雀巢地选择中的区别是：３个主要环境因子中，大山雀与沼泽山雀相比较差异极显著（ｆｍｄ＝６．０２＞ｆ０．０１）；３个洞因子中沼泽山雀与大山雀相比较差异极显著（ｆｍｄ＝６．０２＞ｆ０．０１）．
The nest site selection variables is divided into two parts,habitats variables and cavity variables.The differences of the two tits on habitats are the century upper plant cover,average tree height and the tree species diversity.There are more obvious differences on cavity,the cavity entrance short diameter,the cavity inside diameter and the short diameter of cavity floor.All these factors are the really ecological reasons of their coexistence.
关键词
大山雀
沼泽山雀
天然洞
巢地选择
Nest site selection,Great tit,Mash tit,Natural cavity,Secondary cavity nesting birds
