What factors govern the rate of spread of an invasive species? Assessing the importance of dispersal and selection in range expansion

哪些因素决定了入侵物种的传播速度？

• 批准号: 0715504
• 负责人: Evan Preisser
• 金额: $ 50万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-11-01 至 2011-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0715504&HistoricalAwards=false
• 关键词: What; factors; govern; rate; spread

In this project, mathematical modeling and genetic analysis are combined with experiments and field surveys to better predict the spread of the invasive hemlock woolly adelgid, Adelges tsugae (HWA), across the eastern United States. This forest pest kills eastern hemlock trees and has caused both economic and ecological damage. Genetic markers will be used to identify distinct HWA clonal lines that will each have its spread rate, population growth rate, and cold tolerance measured. This information will be used in combination with survey data reporting the genetic structure of the invasive populations to develop a mathematical model examining the role of dispersal and selection for surviving cold winter conditions in driving the range expansion of HWA.This research will substantially increase the understanding of how invasive species spread across landscapes. Hemlocks have both economic and cultural importance, and their loss concerns groups ranging from forestry officials to local citizens. Understanding how and why HWA spreads throughout the landscape will allow the identification of locations most at risk for infestation for targeted control efforts. This work also increases the ability of scientists and resource managers to anticipate the movement of geographic range boundaries in response to the changing climatic regimes likely to occur as a consequence of global warming.

在这个项目中，数学建模和遗传分析与实验和实地调查相结合，以更好地预测入侵铁杉羊毛球蚜，Adelges tsugae（HWA），在美国东部的传播。这种森林害虫杀死了东部铁杉树，并造成了经济和生态破坏。遗传标记将用于鉴定不同的HWA克隆系，每个克隆系将测量其传播速率、群体生长速率和耐冷性。这些信息将被用来与调查数据报告的入侵种群的遗传结构相结合，开发一个数学模型，研究扩散和选择的作用，生存寒冷的冬季条件下，驱动范围扩大的HWA.这项研究将大大增加了解入侵物种如何跨景观传播。铁杉在经济和文化上都很重要，它们的损失关系到从林业官员到当地公民的各种群体。了解HWA在整个景观中传播的方式和原因将有助于确定最有可能发生虫害的地点，以便进行有针对性的控制工作。这项工作还提高了科学家和资源管理人员的能力，使他们能够预测地理分布范围的移动，以应对全球变暖可能导致的气候状况的变化。