CRB: Habitat Selection of Landbird Migrants

CRB：陆鸟迁徙的栖息地选择

• 批准号: 9100054
• 负责人: Frank Moore
• 金额: $ 3.91万
• 依托单位: University of Southern Mississippi
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-01 至 1994-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9100054&HistoricalAwards=false
• 关键词: CRB; Habitat; Selection; Landbird; Migrants

Habitat use during migration has profound consequences for a bird's ability to satisfy energy requirements, vulnerability to predators, and exposure to environmental stress. The proposed research quantifies habitat use during spring and fall en route periods. Presumably migrants select particular habitats because they thereby enhance their fitness. Although it would be difficult to measure directly the effect of en route use of habitat on survival and reproductive success, it is possible to evaluate the immediate consequences in relation to how effectively migrants satisfy energy demand during migration, i.e. deposit fat reserves and gain body mass. Over half of all North American landbirds are long-distance migrants that journey between temperature breeding ranges and more tropical wintering areas. Decline in populations of Neotropical landbird migrants is linked to habitat loss on the wintering grounds and fragmentation of forested breeding habitats. Because the persistence of migrant populations depends on the bird's ability to find favorable conditions throughout the annual cycle, factors associated with the en route ecology of migrants must figure in the formulation of sound conservation policy.

迁徙过程中的栖息地利用对一个 鸟类满足能量需求的能力， 捕食者和暴露于环境压力。 拟议 研究量化了春季和秋季途中的栖息地使用情况 时期 据推测，移民选择特定的栖息地， 从而增强其适应性。 虽然这将是 难以直接衡量在途中使用 栖息地对生存和繁殖成功的影响， 评估直接后果， 有效地满足移民在移民期间的能源需求，即 存款脂肪储备和增加体重。 超过一半的北美陆地鸟类是长途鸟类 迁徙者在温度繁殖范围之间旅行， 更多的热带越冬地 人口减少 新热带陆鸟移民与栖息地丧失有关 越冬地和森林繁殖的破碎化 栖息地 因为移民人口的持续性取决于 鸟类在整个栖息地中寻找有利条件的能力 年周期，与途中生态相关的因素， 移民必须在制定合理的保护措施时发挥作用 政策