Conserving Energy to Optimize Fecundity in a Derived Host Race of the Goldenrod Gall Fly: Do Warm Winters Limit Distribution?

沃伦·亚伯拉罕森DEB-0343633摘要：暖冬限制分布吗？节约能量以优化黄粉虫衍生寄主种群的繁殖力？虽然人们对限制昆虫地理分布的因素知之甚少，但气候肯定是非常重要的。研究人员将研究黄花五倍子苍蝇，以考察气候对昆虫地理范围的影响。这种苍蝇在夏天进食，积累脂肪，以支持苍蝇过冬，以及在春季成虫羽化和繁殖。经历温暖冬季的苍蝇在整个冬天消耗更多的能量，因此存活率较低，在春季产卵较少。研究人员将创建一个模型，将冬季温度与能源消耗联系起来，最终将胆小蜂的南部地理限制联系起来。该模型将被用于预测随着气候变化的发生，五倍子向北迁移的情况。今天和下个世纪，全球气候变化将影响昆虫的地理范围。这可能会产生严重的后果，特别是对农业，因为害虫可能会进入它们以前无法栖息的地区。在科学家能够预测昆虫分布如何变化之前，他们需要了解哪些因素限制了这些分布。研究人员正在测试一种基于冬季能源使用的模型，该模型将帮助我们预测随着气候变化昆虫分布的地理变化。

Warren Abrahamson DEB-0343633 AbstractConserving Energy to Optimize Fecundity in a Derived Host Raceof the Goldenrod Gall Fly: Do Warm Winters Limit Distribution? While the factors limiting geographic distributions of insects are poorly understood, climate is certainly of great importance. The investigators will study the goldenrod gall fly to examine the role of climate on the geographic range of insects. This fly feeds during the summer to accumulate fat that supports the fly through the winter, as well as adult emergence and reproduction in the spring. Flies experiencing warmer winters use more energy through the winter and thus have lower survival and produce fewer eggs in spring. The investigators will create a model linking winter temperatures to energy use and, ultimately, the southern geographic limit of the gall fly. The model will be applied to predict the northward shift of the gall fly as climate change occurs. Today and into the next century, global climate change will influence the geographic range of insects. This could have serious consequences, especially for agriculture, as pest insects may move into areas they previously could not inhabit. Before scientists can predict how insect distributions might shift, they need to understand which factors limit these distributions. The investigators are testing a model based on winter energy use, which will assist us in predicting the geographic shifts in insect distributions as climates shift.