Collaborative Research: Population Limitation of Neotropical Migrant Birds and the Seasonal-Interaction Hypothesis

合作研究：新热带候鸟的种群限制和季节相互作用假说

基本信息

批准号：
0089541
负责人：
Thomas Sherry
金额：
$ 24.7万
依托单位：
Tulane University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2001
资助国家：
美国
起止时间：
2001-03-15 至 2005-02-28
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0089541&HistoricalAwards=false
关键词：
Collaborative Research Population Limitation Neotropical

项目摘要

0089541SherryUnderstanding the biology of small migratory animals is hampered by the difficulties involved in tracking individuals and integrating ecological impacts year-round. The work proposed here addresses seasonal linkages in two migratory bird species. This study will test the hypothesis that reproductive success depends on habitat quality occupied in the prior tropical winter period in contrast to the conventional alternative that breeding conditions alone matter. Winter habitat signatures will be identified in breeding birds using stable carbon isotopes sampled in blood tissue. Reproductive success will be measured and assessed according to winter habitat occupancy patterns and to indices of breeding territory quality and individual condition. Food manipulations in winter will assess the mechanisms linking habitat quality in winter to breeding events.The abundance and diversity of migratory birds comprise a spectacular natural phenomenon. Such species control insect pests, modify plant communities via seed dispersal and pollination, and stabilize ecosystems upon which humans depend. This research will contribute fundamental new insights into how the abundance of migratory birds is limited and regulated year-round, thereby helping structure seasonally linked population models more accurately. Population models are crucial to understand these animals' responses to human impacts on global habitat quantity, quality, and climate change.

0089541的hherryrynecompands涉及跟踪个人和整合生态影响的困难，阻碍了小型迁徙动物的生物学。这里提出的工作解决了两种迁徙鸟类的季节性联系。这项研究将检验以下假设：与单独繁殖条件至关重要的常规替代方案相反，生殖成功取决于先前热带冬季所占的栖息地质量。使用在血液组织中采样的稳定碳同位素，将在繁殖鸟类中鉴定冬季栖息地特征。将根据冬季栖息地占用模式以及繁殖领土质量和个体状况的指标进行测量和评估生殖成功。冬季的食物操纵将评估将冬季栖息地质量与育种事件联系起来的机制。迁徙鸟类的丰度和多样性包括一种壮观的自然现象。这样的物种控制害虫，通过种子分散和授粉来修改植物群落，并稳定人类所依赖的生态系统。这项研究将对候鸟的丰度有限且全年受管制，从而有助于更准确地结构季节性联系的人群模型，从而为迁徙鸟类的丰富度有限和规范提供了基本的新见解。人口模型对于了解这些动物对人类对全球栖息地数量，质量和气候变化的影响的反应至关重要。