COLLABORATIVE RESEARCH: RAPID: Using river restoration to test the ecological and evolutionary effects of secondary contact

合作研究：RAPID：利用河流恢复来测试二次接触的生态和进化效应

• 批准号: 1343920
• 负责人: David Post
• 金额: $ 14.37万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-01 至 2016-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1343920&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; RAPID; Using; river

In many aquatic ecosystems, dams have isolated fish populations for decades to centuries and the isolated populations have diverged both morphologically and genetically. Secondary contact between previously isolated populations will occur as these dams are removed or restoration efforts restore spatial connectivity. This RAPID project will examine the ecological and evolutionary consequences of the initial stages of secondary contact; restoration of river connectivity will soon allow secondary contact between anadromous alewife populations and landlocked populations in Rogers Lake, Connecticut. Divergence in morphology, foraging behavior, and migration has altered the ecological role of these two alewife life history forms over the past 250-350 years. Research will examine the inbreeding between anadromous and landlocked alewife using genetic markers to track introgression. It will document changes in food web structure, nutrient loading, and habitat and resource use by alewife at the initiation of secondary contact. By documenting these important direct and indirect effects of initial contact between anadromous and landlocked populations, the project will significantly advance our understanding of a process that is fundamental to the origin and maintenance of biodiversity.Although anadromous alewives are a critical resource in freshwater and marine habitats and a federally listed species of conservation concern, landlocked alewives are invasive across their range. The investigators will continue work with local lake associations, land trusts and the regional conservation and management community to aid anadromous alewife restoration efforts by contributing results from this study. They will take advantage of an NIH-funded Yale program to recruit under-represented minority undergraduate students to the project, and will train them in the broader scientific context of the research, research methods, data analysis, and written and oral project reports. Outreach talks to the general public, education programs targeting underrepresented minority groups, interactive displays, and digital outreach via internet and social media are also planned.

在许多水生生态系统中，水坝将鱼类种群隔离了数十年至数百年，并且隔离的种群在形态和遗传上都出现了分化。当这些水坝被拆除或恢复工作恢复空间连通性时，先前孤立的人群之间将发生二次接触。该 RAPID 项目将研究二次接触初始阶段的生态和进化后果；河流连通性的恢复很快将使康涅狄格州罗杰斯湖溯河产卵的白鹀种群与内陆种群之间实现二次接触。在过去 250-350 年里，形态、觅​​食行为和迁徙方面的差异改变了这两种鳅鱼生活史形式的生态作用。研究将利用遗传标记追踪基因渗入来检查产卵雌性和内陆雌性雌性之间的近亲繁殖。它将记录第二次接触开始时，狼蛛的食物网结构、营养负荷以及栖息地和资源利用的变化。通过记录溯河产卵种群和内​​陆种群之间初次接触的这些重要的直接和间接影响，该项目将极大地增进我们对生物多样性起源和维持的基本过程的理解。尽管溯河产卵的鳀鱼是淡水和海洋栖息地的重要资源作为联邦列入保护关注的物种，内陆白鹬在其分布范围内具有入侵性。研究人员将继续与当地湖泊协会、土地信托机构以及区域保护和管理团体合作，通过贡献这项研究的结果来帮助溯河产卵的白鹬恢复工作。他们将利用美国国立卫生研究院资助的耶鲁大学项目招募代表性不足的少数族裔本科生参与该项目，并对他们进行更广泛的研究、研究方法、数据分析以及书面和口头项目报告等科学背景的培训。还计划与公众进行外展对话、针对代表性不足的少数群体的教育计划、互动展示以及通过互联网和社交媒体进行数字外展。