DISSERTATION RESEARCH: Repeated Reverse Island Colonization of Hawaiian Bark Lice

论文研究：夏威夷树皮虱的反复逆岛殖民

• 批准号: 0808120
• 负责人: Kevin Johnson
• 金额: $ 1.16万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-15 至 2010-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0808120&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Repeated; Reverse; Island

The Hawaiian Islands are a hotspot of biodiversity and a natural laboratory for the study of evolution and how quickly new species arise. In fact, Hawaiian insects have the fastest speciation rates documented among invertebrates. One diverse and rapidly speciating group in Hawaii is the bark louse (Order Psocoptera) genus Ptycta, which has 51 described species and more than an estimated 100 species, but has received little attention. This research focuses on the study of Hawaiian Ptycta, including documenting the diversity of Hawaiian Ptycta, analyzing relationships among Ptycta species, and investigating the geographic origin of the Ptycta colonist(s) that reached Hawaii. Preliminary DNA sequence data suggest that Hawaiian Ptycta may have diversified extremely rapidly, with a speciation rate higher than any other insect lineage. These data also support novel patterns that challenge the standard patterns of colonization and diversification on the Hawaiian Islands. This study will improve understanding of the processes driving speciation on the Hawaiian Islands, offer insights into how quickly new species arise, and provide important information on diversity and habitat use of Hawaiian bark lice. Description of new species, documentation of species distribution, and identification of local diversity hotspots will also result, providing important information for conservation of biodiversity in Hawaii.

夏威夷群岛是生物多样性的热点地区，也是研究进化和新物种出现速度的天然实验室。 事实上，夏威夷昆虫在无脊椎动物中具有最快的物种形成率。 夏威夷的一个多样化且快速形成物种的类群是树皮虱（裸翅目）Ptycta 属，该属有 51 种已描述物种，估计超过 100 种，但很少受到关注。本研究的重点是夏威夷 Ptycta 的研究，包括记录夏威夷 Ptycta 的多样性、分析 Ptycta 物种之间的关系以及调查到达夏威夷的 Ptycta 殖民者的地理起源。 初步 DNA 序列数据表明，夏威夷 Ptycta 可能极其迅速地多样化，其物种形成率高于任何其他昆虫谱系。 这些数据还支持挑战夏威夷群岛殖民化和多样化标准模式的新模式。 这项研究将增进对夏威夷群岛物种形成过程的理解，深入了解新物种的出现速度，并提供有关夏威夷树皮虱多样性和栖息地利用的重要信息。 新物种的描述、物种分布的记录以及当地多样性热点的识别也将产生，为夏威夷生物多样性的保护提供重要信息。