Dissertation Research: Molecular Systematics, Origin, and Conservation of the Hawaiian Damselfly Genus Megalagrion

论文研究：夏威夷豆娘巨藻属的分子系统学、起源和保护

• 批准号: 0073314
• 负责人: Chris Simon
• 金额: $ 1万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-01 至 2002-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0073314&HistoricalAwards=false
• 关键词: Dissertation; Research; Molecular; Systematics; Origin

0073314Simon and Jordan Hawaii's active and colorful Megalagrion damselflies (pinao 'ula) have always been among the most beautiful and conspicuous insects in the islands. The roughly 23 species are unusual in that they are thought to be descended from a single colonizing ancestor that has given rise to descendants that now occupy as many different kinds of larval habitats as all other damselflies in the world put together, from swift streams, upland bogs, ponds and brackish pools, to plant leaf bases and damp leaf litter beneath fern banks. During this century, many species of Megalagrion have become locally scarce due to human disturbance. Some lowland species are no longer found on certain islands. Six species or subspecies are currently candidates for listing as threatened or endangered under the Endangered Species Act. The genealogical relationships of the species of Megalagrion have long been debated and are problematic because of their highly variable morphological features and probable ongoing speciation. Graduate student Stephen Jordan, under the direction of Dr. Christine Simon, is studying the phylogenetic relationships of species of Megalagrion and its closest presumed relatives in the Pacific region, in relation to island geography and larval habitats. In this study, he will gather nuclear and mitochondrial DNA sequence data for comparative measures of mutational differences among these and other Pacific area damselflies. A large body of work has accumulated concerning the use of molecular and systematic data in conservation biology. This literature and the new results will provide a basis for recommendations to resource managers working to conserve these important and vulnerable members of Hawaii's freshwater ecosystems.

0073314西蒙和乔丹夏威夷的活泼多彩的Megalagrion豆娘（pinao 'ula）一直是岛上最美丽、最引人注目的昆虫之一。 这大约23个物种的不同寻常之处在于，它们被认为是来自一个殖民祖先的后代，这个祖先已经产生了后代，现在占据了世界上所有其他豆娘的幼虫栖息地之和，从湍急的溪流，高地沼泽，池塘和半咸水池塘，到植物叶基和蕨类植物堤岸下的潮湿落叶。 在这个世纪，由于人类的干扰，许多Megalagrion物种在当地变得稀少。 某些低地物种在某些岛屿上已不复存在。 根据《濒危物种法》，目前有六个物种或亚种被列为受威胁或濒危物种。 Megalagrion物种的系谱关系长期以来一直存在争议，并且由于其高度可变的形态特征和可能正在进行的物种形成而存在问题。 研究生斯蒂芬·乔丹在克莉丝汀·西蒙博士的指导下，正在研究Megalagrion物种及其在太平洋地区最接近的推定亲属的系统发育关系，与岛屿地理和幼虫栖息地有关。在这项研究中，他将收集核和线粒体DNA序列数据，以比较这些和其他太平洋地区豆娘之间的突变差异。大量的工作积累了关于在保护生物学中使用分子和系统数据。 这些文献和新的研究结果将为资源管理者提供一个基础，以保护这些重要而脆弱的夏威夷淡水生态系统的成员。