Dissertation Research: The Evolution of Arboreal Carabid Beetles

论文研究：树栖步甲虫的进化

基本信息

批准号：
0073273
负责人：
David Maddison
金额：
$ 0.83万
依托单位：
University of Arizona
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=0073273&HistoricalAwards=false
关键词：
Dissertation Research Evolution Arboreal Carabid

项目摘要

0073273Maddison and Ober The diversity of many groups of living organisms is related to the evolution of novel features that contribute to an explosive increase in the number of species. Adaptations acquired during such a radiation posses specialized functions and a unique evolutionary history. An example of increasing diversification of species and progressive specialization can be found in carabid beetles, commonly known as ground beetles, that have adapted an arboreal lifestyle. Graduate student Karen Ober, under the direction of Dr. David Maddison, is studying the evolution of arboreal adaptations in carabid beetles by surveying representative taxa across the 10 or so tribes of the large group Lebiomorpha. New collections from Malaysia and from Madagascar (the latter supplied by colleagues) will augment museum holdings and provide materials for molecular and morphological studies. Morphological features include tarsal and claw structures (independent of those associated with mating), leg length, and prorhorax shape, which may be involved in adaptive changes to arboreal life. To investigate the origin and evolution of arboreal carabids, an evolutionary tree of lebiomorphs and their relatives will be reconstructed using molecular sequence data from minimally two genes, the 28S ribosomal RNA gene and the nuclear gene 'wingless.' Both show promise of providing mutational differences that would allow discrimination among lineages of lebiomorphs. With the evolutionary history of relationships in hand, one can study the number and direction of habitat shifts from ground-dwelling to arboreality and explore patterns of changes in ecological and morphological features presumed to be associated with arboreal life.

0073273MADDISON和OBER许多群体的多样性与新型特征的演变有关，这些特征有助于物种数量的爆炸性增加。在这种辐射中获得的适应性具有专业功能和独特的进化历史。可以在甲壳虫（通常称为地甲虫）中找到种植物种多样化和进行性专业化的一个例子，这些甲虫适应了树木的生活方式。在大卫·麦迪逊（David Maddison）博士的指导下，研究生卡伦·奥伯（Karen Ober）正在研究甲壳虫甲虫中的树木适应性的演变，通过对大型Lebiomorpha的10个左右的代表性分类进行调查。来自马来西亚和马达加斯加（同事提供的后者）的新收藏将增强博物馆控股公司，并为分子和形态学研究提供材料。形态学特征包括tarsal和爪结构（与交配相关的爪子），腿长长度和prorhorax形状，它们可能参与了对树栖生命的自适应变化。为了调查树木甲状腺质甲虫的起源和进化，将使用来自最小两个基因的分子序列数据（28S核糖体RNA基因和核基因“无翼”的分子序列数据，将重建lebiomorphs及其亲属的进化树。两者都表现出提供突变差异的希望，可以歧视lebiomorphs的谱系。随着手头关系的进化历史，人们可以研究栖息地的数量和方向，从地面居住到树木上的变化，并探索与树木生命相关的生态和形态学特征变化的模式。