Effects of breeding density on the behaviour and reproductive success of cavity nesting birds

繁殖密度对空巢鸟类行为和繁殖成功率的影响

• 批准号: RGPIN-2016-03742
• 负责人: Wiebe, Karen
• 金额: $ 2.04万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=631957
• 关键词: Effects; breeding; density; behaviour; reproductive

Many species of birds and mammals use tree holes for nesting. Secondary cavity users compete for nesting holes created by excavators such as woodpeckers which are the called the primary cavity excavators. The types of resources (tree substrates) and characteristics of cavities used by different species of cavity-nesters have been well described. However, there is a poor understanding of how intra- and inter-specific competition for nest sites influence the settlement patterns, nest spacing on the landscape, and the reproductive success of cavity-nesting birds in forests. Studying the consequences of breeding density is important because many habitats are becoming more fragmented, for example as a result of forest harvesting. As a result, densities may increase in the remaining habitat patches, and birds may be forced to interact more with one another.

许多种类的鸟类和哺乳动物利用树洞筑巢。次级洞穴使用者争夺由诸如啄木鸟之类的挖掘机（被称为初级洞穴挖掘机）创造的筑巢洞。对不同种类的洞巢虫所利用的资源（树体）类型和洞巢特征进行了详细的描述。然而，有一个贫穷的了解如何内部和种间的巢址竞争影响的解决方案，巢间距的景观，以及在森林中的洞穴筑巢鸟类的繁殖成功。研究繁殖密度的后果很重要，因为许多生境正变得更加支离破碎，例如森林采伐。因此，剩余栖息地斑块的密度可能会增加，鸟类可能会被迫更多地相互交流。