Minority Post Doctoral Research Starter Grant: Understanding Post Colonization Recovery of Genetic Diversity

本研究考察了种群在一次非进化事件后重新获得正常遗传多样性水平的能力。多个海洋物种的种群将从1）喀拉喀托，一个火山岛殖民不到120年前的灾难性喷发，2）巽他大陆架殖民10,000年后，冰后期海平面上升，和3）万鸦老湾，那里的人口基本上没有受到火山或海平面波动的影响。将利用DNA测序来估计每个区域每个物种种群内的遗传多样性水平，以确定时间、扩散能力和世代时间对遗传多样性重新获得的影响。遗传多样性是种群对环境压力和扰动作出反应的能力的基础，也是生物多样性的重要组成部分。种群遗传多样性的维持是自然资源保护者和资源管理者的首要关注。了解种群如何获得遗传多样性，以及影响这一过程的变量，对于制定有效的管理战略以保护遗传和生物多样性至关重要。本研究的结果将提供深入了解人口可能会恢复后，人口规模或重新引入，以及如何管理人员可能会促进种群内的遗传多样性的重新获得严重减少。

This study examines the ability of populations to reacquire normal levels of genetic diversity genetic following a recolonization event. Populations of multiple marine species will be compared from 1) Krakatau, a volcanic island colonized less than 120 years ago following a catastrophic eruption, 2) the Sunda Shelf colonized 10,000 years after postglacial sea level rise, and 3) Manado Bay where populations have remained largely unaffected by vulcanism or sea level fluctuations. DNA sequencing will be employed to estimate levels of genetic diversity within populations of each species from each region to determine the effect of time, dispersal ability, and generation time on the reacquisition of genetic diversity.Genetic diversity is fundamental to the ability of a population to respond to environmental stress and perturbations and is an essential component of biological diversity. The maintenance of genetic diversity in populations is a primary concern of both conservationists and resource managers. Understanding how populations acquire genetic diversity, as well as the variables affecting this process, is critical to developing effective management strategies to preserve both genetic and biological diversity. The results of this study will provide insight into how populations may recover following a severe reduction in population size or reintroduction as well as how managers might facilitate the reacquisition of genetic diversity within populations.