Population ecology of an endemic and an invasive species

种群动态的原因和后果是种群生态学家的研究领域。 地方性物种和外来物种的种群动态往往不同，地方性种群的爆发是暂时的，而外来物种的爆发是持久的。北方特有森林鳞翅目昆虫最显著的动态是种群循环。与这些种群周期相关的特征是：爆发之间的周期为6至11年，种群在5至8年内增加，然后迅速下降，没有持续低种群密度的时期，以及不同种群之间的同步性。对于西方帐篷毛虫，病毒性疾病的动物流行病发生在种群爆发中。我们建议研究两个问题帐篷毛虫种群动态：病毒感染的严重程度在爆发人群与环境条件，是同步性的网站之间的环境决定或由于扩散？ 我们将使用新开发的遗传标记，以确定在多大程度上保持种群间的蛾的传播同步和现场实验和天气和人口记录，研究病毒流行病。

The causes and consequences of population dynamics are the domain of population ecologists. Population dynamics of endemic and exotic species often differ in that outbreaks of endemic populations are temporary while those of exotic species are persistent. the most striking dynamics of endemic forest Lepidoptera in the northern hemisphere are population cycles. Characteristics associated with these population cycles are; a periodicity of 6 to 11 years between outbreaks, population increase over 5 to 8 years and then a rapid decline, no period of persistent low population density, and synchronicity among separate populations. For western tent caterpillars epizootics of a viral disease occur in population outbreaks. We propose to study two questions about tent caterpillar population dynamics: Is severity of viral infection in outbreak populations related to environmental conditions, and is the synchronicity of populations among sites environmentally determined or due to dispersal? We will use newly developed genetic markers to determine to what extent dispersal of moths among populations maintains synchronicity and field experiments and weather and population records to study viral epizootics.