Maternal effects as a bridge between parental environment and offspring phenotype during range expansion

在范围扩展过程中，母体效应作为亲本环境和后代表型之间的桥梁

• 批准号: 0918095
• 负责人: Renee Duckworth
• 金额: $ 32.27万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0918095&HistoricalAwards=false
• 关键词: Maternal; effects; bridge; between; parental

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Numerous species are expected to modify their geographical range in response to climate change. Predicting the extent and speed with which such range changes will occur is difficult because we currently have a poor understanding of the mechanisms that enable species to invade and spread into new areas. The proposed research will capitalize on the recently discovered large scale range expansion of western bluebirds (Sialia mexicana) to gain insight into the mechanisms underlying this process. In this species, during the colonization of new populations at the edge of the range, breeding females influence the colonizing behavior of male offspring in response to changes in local resource abundance. When resources are limited, they produce males that disperse and spread into new areas; whereas, when resources are abundant, they produce males that remain in their natal population to breed. However, the proximate mechanisms by which breeding females influence offspring dispersal are not known. The proposed research combines a detailed knowledge of the history of western bluebird's range expansion and long-term tracking of marked individuals with field experiments on maternal physiology to test alternative hypotheses of how mothers influence offspring behavior during range expansion. Not only will this work provide insight into the mechanisms underlying range expansion, but it also provides a unique opportunity for dissemination of information about species coexistence and biodiversity in relation to climate change through existing bluebird monitoring programs which involve collaborations between local ranchers, Native American tribes and members of the general public.

该奖项由2009年美国复苏和再投资法案（公法111-5）资助。许多物种预计将改变其地理范围以应对气候变化。预测这种范围变化的程度和速度是困难的，因为我们目前对物种入侵和扩散到新地区的机制了解甚少。这项拟议的研究将利用最近发现的西部蓝知更鸟（Sialia mexicana）的大规模范围扩张，以深入了解这一过程的机制。在这个物种中，在新的种群在范围的边缘殖民化，繁殖女性的影响殖民行为的男性后代在当地资源丰富度的变化。当资源有限时，它们产生的雄性会分散并扩散到新的地区;而当资源丰富时，它们产生的雄性会留在它们的纳塔尔种群中繁殖。然而，繁殖雌性影响后代扩散的近似机制尚不清楚。拟议中的研究结合了详细的知识，西部蓝知更鸟的范围扩张和长期跟踪标记的个人与产妇生理学的实地实验，以测试替代假设的母亲如何影响后代的行为在范围扩张。这项工作不仅将深入了解潜在的范围扩大的机制，但它也提供了一个独特的机会，通过现有的蓝鸟监测计划，涉及当地牧场主，美洲原住民部落和公众成员之间的合作，传播有关物种共存和生物多样性的信息。