PEET: Systematics of the Daltoniaceae (Bryophyta)

PEET：Daltoniaceae（苔藓植物）的系统学

• 批准号: 0529593
• 负责人: Arthur Shaw
• 金额: $ 74.24万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0529593&HistoricalAwards=false
• 关键词: PEET; Systematics; Daltoniaceae; Bryophyta

The goals of this project are to reconstruct phylogenetic relationships among an ecologically prominent group of Southern Hemisphere mosses, and to clarify the boundaries among species, their geographic ranges, and their distinguishing features. The Daltoniaceae, which are the focal group for this research, are widespread in tropical and South-Temperate forests of both South America and Australasia. The species are conspicuous components of many Southern Hemisphere ecosystems, where they occur as epiphytes on flowering plants and tree ferns, on soil, and on rotting logs. There are about 14 genera and 215 species in the family, but basic information about their ecology and geographic ranges is still lacking. The current project will provide a multifaceted assessment of biodiversity patterns in the Daltoniaceae, utilizing a range of methodology including laboratory analyses of morphological variation, field studies of ecological relationships, and DNA nucleotide sequence data to resolve population structure and phylogenetic relationships. The research will yield formal taxonomic treatments for these mosses (including illustrations, descriptions, and other tools for identification), plus molecular analyses of genealogical relationships that are crucial to understanding the origin of morphological and ecological diversity in this group. Analyses of molecular phylogenetic information will be employed to infer rates and patterns of diversification and how those patterns relate to ecological and geographical factors. The project will address a broad range of scientific issues using complementary methods that are all directed toward a better understanding of the world's biodiversity and its origins. The Southern Hemisphere has a rich and relatively poorly known flora and many of the distributional patterns found in Daltoniaceae occur in other plant and animal groups. Thus, the application of molecular tools to understanding the geography of biodiversity will be relevant to many other groups. The taxonomic treatments produced by this research provide a basic description of biodiversity patterns and thus form the foundation for all future research by members of the broader scientific community. As a PEET grant, this project is built around a central goal of training young investigators to develop future careers in science, and in particular, in studies of biodiversity. This project impacts favorably on scientific infrastructure by including undergraduate, graduate, and post-doctoral trainees in all aspects of the work. Intellectual cross stimulation and the development of a positive, collaborative research ethic is an important training component of the project. All information collected during the course of this research will be made freely available on the internet, and will be broadly accessible to the public.

该项目的目标是重建南半球生态突出的苔藓类群之间的系统发育关系，并澄清物种之间的界限、地理范围和显着特征。 道尔顿科是本研究的重点群体，广泛分布于南美洲和澳大利亚的热带和南温带森林中。该物种是许多南半球生态系统的显着组成部分，它们以附生植物的形式出现在开花植物和树蕨、土壤和腐烂的原木上。该科约有14属、215种，但仍缺乏有关其生态和地理范围的基本信息。当前的项目将对道尔顿科的生物多样性模式进行多方面的评估，利用一系列方法，包括形态变异的实验室分析、生态关系的实地研究和DNA核苷酸序列数据，以解决种群结构和系统发育关系。该研究将为这些苔藓提供正式的分类学方法（包括插图、描述和其他识别工具），以及谱系关系的分子分析，这对于理解该类苔藓的形态和生态多样性的起源至关重要。 对分子系统发育信息的分析将用于推断多样化的速率和模式以及这些模式与生态和地理因素的关系。 该项目将使用补充方法解决广泛的科学问题，所有这些方法都旨在更好地了解世界生物多样性及其起源。南半球拥有丰富但相对鲜为人知的植物区系，道尔顿科中发现的许多分布模式也出现在其他动植物群中。 因此，应用分子工具来了解生物多样性的地理将与许多其他群体相关。这项研究产生的分类学处理提供了生物多样性模式的基本描述，从而为更广泛的科学界成员未来的所有研究奠定了基础。作为 PEET 资助项目，该项目的核心目标是培训年轻研究人员发展未来的科学职业，特别是生物多样性研究。 该项目通过让本科生、研究生和博士后学员参与工作的各个方面，对科学基础设施产生了有利的影响。 智力交叉刺激和积极、协作研究道德的发展是该项目的重要培训组成部分。 本研究过程中收集的所有信息将在互联网上免费提供，并向公众广泛开放。