A Multi-faceted Exploration of Late Paleozoic Communities

晚古生代群落的多方位探索

• 批准号: 0746072
• 负责人: Stephen Schellenberg
• 金额: $ 17万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-05-01 至 2014-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0746072&HistoricalAwards=false
• 关键词: Multi; faceted; Exploration; Late; Paleozoic

A Multi-faceted Exploration of Late Paleozoic CommunitiesLindsey Leighton, Stephen Schellenberg, Jerad Morrow, and Christie Schneider San Diego State University: EAR-0746072AbstractTo understand how community diversity (the number of species in an ecosystem) can be negatively affected by disturbances, including those induced by humans, we need a clear understanding of the factors controlling biodiversity under normal conditions. Four factors ? climate, habitat, productivity, and interactions among organisms ? have been recognized as influences on community diversity. Although studies of the relationship between diversity and any one factor exist, there have been no studies examining all four factors on the same communities. The goal of this study is to examine the relationship between diversity and the four factors in a set of well-preserved Pennsylvanian (300 million years ago) fossil marine communities from Texas, which are among the oldest that include diverse and abundant elements of both the Paleozoic and Modern Faunas.Fossil marine invertebrates will be collected, identified, and counted from 8-10 separate communities. These data will be analyzed using ordination, a technique that reduces multi-dimensional data (such as those produced by multiple communities) to a graphical plot that permits recognition of similarity among communities. In addition, using geochemical, sedimentological, and predation-trace analyses, it is possible to determine values for the four factors for each community. Having determined which communities are similar, PIs will determine statistically which of the factors influence the degree of similarity among communities, and the interactions among the communities.The entire project is closely linked with student training, projects and classes. Several students will be involved in the project from start to finish and will have an excellent ?hands-on? opportunity to do real research as part of a multi-disciplinary team.Although the results from a single study will not solve the question of how multiple, interacting, factors influence diversity, it is hoped that this study will serve as a model for community analyses, and thus lead to many future studies through time and space.

晚古生代群落的多方面探索Lindsey Leighton，Stephen谢伦贝格，Jerad Morrow，and Christie Schneider圣地亚哥州立大学：E-0746072摘要为了理解群落多样性（生态系统中的物种数量）如何受到干扰的负面影响，包括人类引起的干扰，我们需要清楚地了解在正常条件下控制生物多样性的因素。 四个因素？气候、生境、生产力和生物体之间的相互作用？被认为是对社区多样性的影响。 虽然存在多样性与任何一个因素之间关系的研究，但没有研究对同一社区的所有四个因素进行审查。 这项研究的目的是研究多样性和四个因素之间的关系，在一组保存完好的宾夕法尼亚州（3亿年前）的化石海洋群落从得克萨斯州，这是最古老的，包括多样性和丰富的元素，古生代和现代Faunas.化石海洋无脊椎动物将被收集，确定，并从8-10个独立的社区计数。 这些数据将使用排序进行分析，排序是一种将多维数据（如多个社区产生的数据）简化为图形的技术，可以识别社区之间的相似性。 此外，使用地球化学，沉积学和捕食痕迹分析，它是可能的，以确定每个社区的四个因素的值。 在确定了哪些社区是相似的之后，PI将通过统计来确定哪些因素影响社区之间的相似程度，以及社区之间的相互作用。整个项目与学生培训，项目和课程密切相关。 几个学生将参与该项目从开始到结束，将有一个优秀的？亲自动手有机会作为多学科团队的一部分进行真实的的研究。虽然单一研究的结果无法解决多个相互作用的因素如何影响多样性的问题，但希望这项研究能够作为社区分析的模型，从而引领许多未来的研究。跨越时间和空间。