Collaborative Research: Ecology of Migratory Passerine Birds in Breeding and Wintering Areas: Demographic and Experimental Studies

合作研究：繁殖和越冬地区候鸟的生态学：人口统计和实验研究

• 批准号: 9213828
• 负责人: Thomas Sherry
• 金额: $ 12.6万
• 依托单位: Tulane University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1997-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9213828&HistoricalAwards=false
• 关键词: Collaborative; Research; Ecology; Migratory; Passerine

The objectives of this research are to determine what factors limit or regulate populations of migratory birds that breed in north temperate forests and winter in the Neotropics. the basic questions concerns whether these factors operate more importantly in summer breeding areas at temperate latitudes, in neotropical winter quarters, or during both seasons. Through demographic and experimental studies, hypotheses will be tested to determine (1) if limitation occurs in both summer and winter, (2) if habit occupancy is determined by social dominance (depotism) or other preemptive behavior, (3) if individuals vary in fitness among habitats, that is, the demographic consequences of despotic habitat selection, and (4) what ecological variables affect habitat quality and therefore fitness. Emphasis will be on differential fitness among habitats i both summer and winter, including second-growth forests, agricultural lands, and other human-modified habitats. The results will advance our understanding of the population dynamics and community relations of these migrant bird species, as well as the factors affecting their population abundances. Such information will also contribute to the development of sound and effective conservation policies.

这项研究的目的是确定哪些因素限制或调节在北温带森林繁殖和在新热带地区越冬的候鸟种群。 基本问题涉及这些因素是否在温带夏季繁殖区、新热带冬季或两个季节中发挥更重要的作用。 通过人口统计和实验研究，将测试假设以确定（1）限制是否发生在夏季和冬季，（2）习惯占用是否由社会主导（专制主义）或其他先发制人的行为决定，（3）个体是否在栖息地之间的适应性，即专制栖息地选择的人口统计后果，以及（4）哪些生态变量影响栖息地质量并因此影响适应性。 重点将放在夏季和冬季栖息地之间的差异适应性，包括次生林、农田和其他人类改造的栖息地。 研究结果将增进我们对这些候鸟物种的种群动态和群落关系以及影响其种群丰度的因素的理解。 这些信息还将有助于制定健全有效的保护政策。