REU/ROW: Systematics and Evolution of Semionotid Fishes in an Early Jurassic Lake

REU/ROW：早侏罗世湖泊中半节鱼的系统学和进化

• 批准号: 8707500
• 负责人: Amy McCune
• 金额: --
• 依托单位: Cornell Univ - State: AWDS MADE PRIOR MAY 2010
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-09-01 至 1993-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8707500&HistoricalAwards=false
• 关键词: REU; ROW; Systematics; Evolution; Semionotid

The goal of this research is to understand the origin of a closely-related complex of 21 species of fishes, in the genus Semionotus, in relation to the formation, expansion and subsequent evaporation of a large fossil lake (Lake P4) preserved in the Newark Basin of eastern North America. Specific objectives are to: (1) determine which species were unique to Lake P4 by mapping the occurrences of these species in 8 distinct lake basins and through 33 million years of time, (2) analyze the genealogical (phylogenetic) history of these species, and (3) test the hypothesis that those species which are unique to P4 (and thus probably originated in that lake) will be more derived and appear later in the historical record of the lake than those species which have widespread distributions and presumably colonized Lake P4 during its early history. This study will have significant implications for our understanding of the fundamental pattern of the origin of species and of the relation between environmental change and organic evolution.

本研究的目的是了解一个密切相关的复杂的21种鱼类，在属Semionotus的起源，在北美东部的纽瓦克盆地保存的大型化石湖（湖P4）的形成，扩张和随后的蒸发。具体目标是：（1）通过绘制这些物种在8个不同湖盆和3300万年时间内的出现情况，确定哪些物种是P4湖独有的，（2）分析谱系这些物种的（系统发育）历史，（3）检验P4所特有的那些物种（因此可能起源于该湖）将更多地衍生，并出现在湖泊的历史记录中，而不是那些具有广泛分布并可能在P4湖早期历史中殖民的物种。这项研究将对我们理解物种起源的基本模式以及环境变化与有机进化之间的关系具有重要意义。