U.S.-Brazil Dissertation Enhancement Research: Phylogeography of Proceratophrys Boiei and Hyla Geographica (Amphibia, Anura) in Rainforest Fragments of Northeastern Brazil

这篇论文增强补助金将支持安娜C。在约翰·M.芝加哥大学的贝茨博士对巴西东北部两种森林青蛙的地理分布和种群遗传学进行了详细的研究。13个种群的树蛙和10的垃圾青蛙将进行比较的地理距离，片段的年龄和大小的影响，对当地水平的遗传多样性。 这些研究的主要目标是通过评估线粒体和核DNA多态性水平，评估自然和人为森林破碎化对这些物种的群体遗传学的影响。 这些被研究的青蛙物种栖息在大西洋雨林的碎片中，这是一种重要的植被类型，可能比我们熟悉的亚马逊森林更濒危。 这项研究将阐明巴西森林遗传多样性的模式，这项研究有可能揭示该地区的历史，并为当地的保护做法提供信息。 这些结果可能与保护生物学、种群遗传学和系统生物学有关。

This dissertation enhancement grant will support Ana C. Carnaval under the direction of Dr. John M. Bates of the University of Chicago, for a detailed study of phylogeography and population genetics of two species of forest frogs in northeastern Brazil. Thirteen populations of tree frog and ten of the litter frog will be compared for the effects of geographic distance, fragment age, and size on local levels of genetic diversity. The main goal of these studies is to assess the impact of natural and human-made forest fragmentation on the population genetics of these species, by assessing levels of mitochondrial and nuclear DNA polymorphisms. These frog species being examined inhabit fragments of Atlantic rainforest, an important vegetational type that may be more endangered than the familiar Amazonian forest. The study will elucidate patterns of genetic diversity in Brazilian forests, and the research has the potential to shed light on the history of this region and inform local conservation practices. The results likely will have relevance to conservation biology, population genetics, and systematic biology.