DISSERTATION RESEARCH: Evolutionary potential in response to climate change in two related species with different dispersal modes

论文研究：具有不同扩散模式的两个相关物种响应气候变化的进化潜力

• 批准号: 1209531
• 负责人: Jeffrey Levinton
• 金额: $ 1.5万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2015-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1209531&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Evolutionary; potential; response

The proposed research will investigate how different rates of dispersal in marine snails can influence their ability to adapt to water temperatures. The investigators will compare the larval and juvenile traits of two species of snail (genus Crepidula) under different temperature regimes. One of the species (C. fornicata) has larvae that live in the water for 2-4 weeks and disperse with ocean currents; the other (C. convexa) has larvae that disperse by crawling away as juveniles. Previous research has shown that C. convexa has much lower dispersal than C. fornicata, and that this lower dispersal may allow the species to adapt to local water temperatures. The current project will rear larvae and juveniles of both species at an ambient temperature and a stressful, higher temperature to investigate the genetic basis of temperature tolerance in these species.This research is important because it will help to elucidate the links between dispersal mode, gene flow, and extant local adaptation as related to future adaptation in the face of warming climate, one of the most pressing questions facing organismal biologists today. In addition to being a valuable model system to answer these questions, the issue of range shifts or expansions in C. fornicata is of management interest. The species is invasive in Europe and has impacted its invaded ecosystems. These same impacts may also apply to the native range of C. fornicata as the species expands its range and abundance northward in response to warming water temperature.

拟议的研究将调查海洋蜗牛的不同传播速度如何影响它们适应水温的能力。 研究人员将比较两种蜗牛（Crepidula属）在不同温度条件下的幼虫和幼虫特征。 其中一个物种（C. fornicata）的幼虫在水中生活2-4周，并随洋流扩散;另一种（C. convexa）的幼虫在幼年时通过爬行而分散。 以往的研究表明，C. convexa比C.这种较低的扩散可能使该物种能够适应当地的水温。 本研究将在环境温度和高温胁迫条件下培育这两个物种的幼虫和幼体，以研究这些物种耐温性的遗传基础。这项研究很重要，因为它有助于阐明扩散模式、基因流和现存的局部适应之间的联系，以及未来面对气候变暖时的适应性，这是当今生物学家面临的最紧迫的问题之一。除了作为回答这些问题的一个有价值的模型系统之外，C语言中的值域移动或扩展问题也是一个有价值的模型系统。fornicata是管理层感兴趣的。该物种在欧洲具有入侵性，并影响了其入侵的生态系统。这些影响也可能适用于C的原生范围。fornicata，因为该物种的分布范围和数量随着水温的升高而向北扩展。