Phenotypic plasticity and adaptation in the morphology, life history traits and bioenergetics of introduced species

我的发现补助金在这个周期的研究将集中在生活史，形态学，遗传学和入侵鱼类种群的生物能量学;他们的能力，以应对新的环境和适应本地环境的损失所提出的新机会。假设将进行测试，确定和解释观察到的生活史差异本地和非本地人口，动态改变的生活史特征作为入侵物种扩大其范围，健身优势，个人迁移到新的领域，入侵种群的形态可塑性，和充满活力的适应入侵种群一个新的热制度。动态方面的范围扩大将评估一轮虾虎鱼在安大略，我们已经研究自2006年以来。人口和生活史特征将在其扩大范围的边缘与前一年的边缘进行比较，以测试该物种是否迅速改变生活史策略。人口密度和栖息地数据将被纳入我们开发的范围扩展模型。将进行现场试验，以确定虾虎鱼生物量，深度，速度和基板上虾虎鱼eDNA的影响，和eDNA检测模型将从这些数据开发。线粒体和微卫星DNA将从本地和非本地南瓜种子进行分析，以确定原产地和伊比利亚半岛的范围扩展的机制，该物种是入侵的。使用后代南瓜种子殖民地建立在西班牙和安大略，营养共同环境实验将进行与青少年形态可塑性评估和测试替代假设，以解释损失的适应本地热制度。将评估这些菌落后代的生活史特征，以确定遗传和表型可塑性对观察到的生活史差异的相对贡献。这项研究提供了一个独特的机会来解释为什么特定的物种在某些地区是成功的入侵者，而在其他地区却不是。

My Discovery Grant research in this cycle will focus on the life history, morphology, genetics and bioenergetics of invasive fish populations; their ability to respond to new opportunities presented by novel environments and the loss of adaptations to the native environment. Hypotheses will be tested that identify and explain observed life history differences between native and non-native populations, the dynamic alteration of life history traits as invasive species expand their range, fitness advantages to individuals that migrate into new areas, morphological plasticity in invasive populations, and energetic adaptations of invasive populations to a novel thermal regime. Dynamic aspects of range expansion will be assessed on a Round Goby in Ontario that we have studied since 2006. Population and life-history traits will be compared at the edge of its expanding range with those of its previous-year edge to test whether this species rapidly shifts life history strategies. Population density and habitat data will be incorporated into a range expansion model we developed. Field trials will be conducted to determine the effect of goby biomass, depth, velocity and substrate on goby eDNA, and an eDNA detectability model will be developed from these data. Mitochrondrial and microsatellite DNA will be analyzed from native and non-native Pumpkinseed to identify the area of origin and mechanisms of range expansion in the Iberian Peninsula where the species is invasive. Using progeny from Pumpkinseed colonies established locally from source populations in Spain and Ontario, trophic common environment experiments will be conducted with juveniles to assess morphological plasticity and to test alternative hypotheses to explain the loss of adaptations to native thermal regimes. Life-history traits of progeny from these colonies will be assessed to determine the relative contribution of inheritance and phenotypic plasticity to observed life history differences. The proposed research provides a unique opportunity to explain why particular species are successful invaders in some regions but not others.