REU: Collaborative Research: Ecology of Migratory PasserineBirds on Breeding and Wintering Areas - Demographic and Experimental Studies

REU：合作研究：迁徙雀形目鸟类在繁殖和越冬地区的生态学 - 人口统计和实验研究

• 批准号: 8907298
• 负责人: Thomas Sherry
• 金额: $ 18.34万
• 依托单位: Tulane University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-07-01 至 1992-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8907298&HistoricalAwards=false
• 关键词: REU; Collaborative; Research; Ecology; Migratory

This study is a continuation and expansion of long-term studies of population dynamics and habitat selection by two migratory passerine bird species on their breeding grounds, in forested parts of central New Hampshire and on wintering sites in Jamaica. It combines experimental, observational, and demographic approaches to test the hypothesis that populations of these species are limited both in summer and winter. Three steps will be used in both areas: (1) a test whether habitat selection is density dependent and/or despotic (i.e., younger individuals or females are constrained by socially dominant older males), as reflected in distribution patterns along habitat gradients, and by testing for dominance behavior directly; (2) a test for consequences of dominance behavior on age- and sex-specific reproduction and/or survival by habitat, and (3) a determination of the importance of temporally and spatially variable food supplies (especially a defoliating caterpillar in breeding areas) and predators as possible ecological causes of demographic patterns observed. Finally, the relative importance of temporally variable ecological conditions on age-structure and abundances of these populations will be assessed. Such information is urgently needed by conservationists, due to rapid habitat loss for these migratory species on both breeding and wintering areas.

本研究是对长期以来 研究种群动态和栖息地选择的两个 迁徙雀形目鸟类在其繁殖地， 新罕布什尔州中部的森林地区和 牙买加. 它结合了实验，观察， 人口统计学方法来检验假设， 这些物种在夏季和冬季都是有限的。 三个步骤 将用于两个方面：（1）测试是否栖息地选择 是密度依赖的和/或专制的（即，年轻患者 或女性受到社会主导的老年男性的限制）， 反映在分布格局沿着生境梯度， 直接测试支配行为;（2）测试 优势行为对年龄和性别特异性的影响 繁殖和/或生存的栖息地，和（3）确定 时间和空间上可变的食物的重要性 供应品（特别是繁殖中的落叶毛虫 地区）和捕食者作为可能的生态原因的人口 观察到的模式。 最后，相对重要性 时变生态条件对年龄结构和 将对这些种群的丰度进行评估。 等 由于快速发展，自然资源保护主义者迫切需要信息 这些迁徙物种的栖息地丧失对繁殖和 越冬区。