The change of excavated cavity quantity influence the quantity of Ashy Starling significantly, the change of all cavity influence the quantity of Great Tit and Ashy Starling significantly.
啄洞数量的变化对灰椋鸟的数量变化产生明显影响；样地内总的树洞数量的变化对灰椋鸟和大山雀数量产生明显影响。
参考来源 - 鸟类群落结构形成的因素分析·2,447,543篇论文数据，部分数据来源于NoteExpress
N a large common Eurasian tit, Parus major, with yellow-and-black underparts and a black-and-white head 大山雀
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