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.

在该项目中，将数学建模和遗传分析与实验和现场调查相结合，以更好地预测侵入性的Hemlock羊毛Adelgid，Adelges Tsugae（HWA）在美国东部的传播。这种森林有害生物杀死了铁杉树，并造成了经济和生态损害。遗传标记将用于识别不同的HWA克隆线，这些线条将其分布速率，人口增长率和测得的冷耐受性。该信息将与调查数据结合使用，报告侵入性种群的遗传结构，以开发一种数学模型，研究分散和选择在促进寒冷冬季条件下的作用，以推动HWA的扩张范围扩展。这项研究将大大提高人们对侵入性物种在跨景观中的侵入性分布方式的理解。铁杉具有经济和文化的重要性，他们的损失涉及从林业官员到当地公民的群体。了解HWA如何以及为什么在整个景观中传播，将允许确定最有针对性控制工作风险的位置。这项工作还提高了科学家和资源经理的能力，可以预测地理范围边界的运动，以应对由于全球变暖而可能发生的气候变化而发生的变化。