Dissertation Research: An Analysis of Diversification in Neritopsine Gastropods: Evidence from Phylogeography and Paleontology

论文研究：Neritopsine 腹足动物多样化分析：来自系统发育地理学和古生物学的证据

• 批准号: 0104788
• 负责人: David Lindberg
• 金额: $ 1.03万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-15 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0104788&HistoricalAwards=false
• 关键词: Dissertation; Research; Analysis; Diversification; Neritopsine

Understanding the processes that shape biodiversity requires multiple lines of evidence, including those from paleobiology, ecology, population genetics, biogeography, and phylogenetics. I will use a powerful technique, known as phylogeography, that employs many of these lines to investigate which processes have been most important in generating diversity in a group of gastropods known as the Neritopsina. I will be testing whether or not species that are distributed in space with geographic barriers separating them show more genetic divergence between populations than species that have no barriers between populations. I will then combine this information with data from their evolutionary relationships and fossil record to test whether or not this divergence at the population level is manifested as significant diversity at the species level.As biodiversity is a dynamic process, with populations and species in a constant state of flux, it is necessary to understand how diversity is generated in order to make informed conservation decisions. By understanding how geographic distribution has affected the evolutionary history of these gastropods, we may better understand which processes need to be conserved in order to ensure that diversity remains relatively stable through time. Instead of focusing solely on the current state of these gastropod species, I will be examining how we might better ensure that they are allowed to continue to maintain and generate diversity in the millennia to come.

了解形成生物多样性的过程需要多方面的证据，包括来自古生物学，生态学，种群遗传学，地理学和遗传学的证据。 我将使用一种强大的技术，被称为地理学，它使用了许多这些线来调查哪些过程在一组被称为Neritopsina的腹足动物中产生多样性方面最重要。 我将测试是否物种分布在空间与地理障碍分开他们显示更多的种群之间的遗传差异比物种之间没有障碍。 然后，我将联合收割机结合这些信息，从它们的进化关系和化石记录的数据，以测试这种在种群水平上的分歧是否表现为物种水平上的显著多样性。由于生物多样性是一个动态过程，种群和物种处于不断变化的状态，因此有必要了解多样性是如何产生的，以便做出明智的保护决策。 通过了解地理分布如何影响这些腹足类动物的进化历史，我们可以更好地了解哪些过程需要保护，以确保多样性随着时间的推移保持相对稳定。 与其仅仅关注这些腹足类物种的现状，我将研究我们如何更好地确保它们在未来的千年里继续保持和产生多样性。