Dissertation Research: Determinants of Annual Breeding Productivity of a Neotropical Migrant Bird, the Black-throated Blue Warbler

论文研究：新热带候鸟黑喉蓝莺年繁殖力的决定因素

• 批准号: 0104989
• 负责人: Richard Holmes
• 金额: $ 0.99万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-05-15 至 2003-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0104989&HistoricalAwards=false
• 关键词: Dissertation; Research; Determinants; Annual; Breeding

Annual reproductive output has been shown to be a major factor affecting the recruitment, and hence the abundance, of Neotropical migrant birds. This study will identify and evaluate the mechanism(s) driving reproductive output that are critical to understanding current and future population trends of these species, many of which are declining. A review of the literature and analysis of breeding data on Black-throated Blue Warblers (Dendroica caerulescens) reveals that an important factor affecting the number of breeding attempts, and hence productivity, is territory level-food availability. This study will test to see if food is a causal factor using a food supplementation experiment. Additionally, observational data will be collected to test the alternative hypotheses that nest site availability, male assistance/protection, or female quality drives the number of breeding attempts and therefore annual reproductive output. This research contributes to current knowledge by examining population-level questions from the perspective of the individual female. Using a mechanistic approach, coupled with modeling this study will provide information necessary to assess how species respond to perturbations, which is especially import in light of proposed changes in species abundance due to global warming, habitat fragmentation, and other anthropogenic effects.

年繁殖产量已被证明是影响新热带候鸟的补充和数量的主要因素。 这项研究将确定和评估驱动生殖输出的机制，这对于了解这些物种当前和未来的种群趋势至关重要，其中许多物种正在下降。 对黑喉蓝莺（Dendroica caerulescens）的文献综述和繁殖数据分析表明，影响繁殖尝试次数以及生产力的一个重要因素是领地水平的食物供应。 这项研究将通过食品补充剂实验来测试食物是否是一个致病因素。此外，还将收集观察数据来测试其他假设，即筑巢地点的可用性、雄性协助/保护或雌性质量驱动繁殖尝试的次数，从而影响年繁殖产量。 这项研究通过从女性个体的角度审视人口层面的问题，为当前的知识做出了贡献。 使用机械方法，结合建模，这项研究将提供评估物种如何应对扰动所需的信息，鉴于全球变暖、栖息地破碎化和其他人为影响导致物种丰度发生变化，这一点尤其重要。