Collaborative Research: MSB: Links Between Soil Biogeochemistry and Microbial Community Dynamics Along Recently Deglaciated Chronosequences

合作研究：MSB：土壤生物地球化学和微生物群落动态与最近消融时间序列之间的联系

• 批准号: 0921940
• 负责人: Eran Hood
• 金额: $ 7.06万
• 依托单位: University of Alaska Southeast Juneau Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0921940&HistoricalAwards=false
• 关键词: Collaborative; Research; MSB; Links; Between

Studies of how plant communities assemble and shift on landscapes created by receding glaciers have been integral in developing the theoretical bases of nutrient cycling, organismal interactions, and community dynamics in the face of environmental change. Indeed, the relative simplicity of these 'young' (geologically speaking) systems has revealed patterns in ecosystem structure and function that often also apply across a wide range of older, more complex environments. Although soil microorganisms regulate nutrient cycling reactions with regional to global importance, there is no parallel understanding of how these communities come together and change through time. This work will address three hypotheses which relate microbial community structure and soil nutrient status across newly deglaciated sites in three geographically, geologically and climatically disparate locations (Alaska, Peru and Montana). An array of techniques, including newly developed methods in high-throughput DNA sequencing and bioinformatics, microbial process measurements, and field manipulations will be replicated at the three different sites, and are designed to reveal broadly applicable patterns that govern early microbial community development. The project will support three graduate and two undergraduate students, including broadening participation from Native Alaskans at the University of Alaska, Southeast. Additionally, ecosystem science learning will be extended to a high school that serves "at risk" students, and students from underrepresented groups in science, by developing a new course using recently deglaciated soils as model systems for students to understand the relationships between nutrient cycling and biodiversity. The PIs will also work closely with the United States Forest Service staff at the Mendenhall Visitor Center to integrate the results of this project into interpretive programs and displays.

研究植物群落如何通过回收冰川造成的景观组装和转变在发展营养自行车，有机体相互作用和社区动态的理论基础上是不可或缺的。确实，这些“年轻”（从地质上讲）系统的相对简单性揭示了生态系统结构和功能中的模式，这些模式通常也适用于广泛的较旧，更复杂的环境。尽管土壤微生物调节养分循环反应具有区域重要性，但对这些社区如何融合和随着时间的变化没有平行的了解。这项工作将解决三个假设，这些假设将微生物群落结构和土壤养分状况与新脱回去的地点的土壤养分状态相关联，在地理，地质和气候不同的位置（阿拉斯加，秘鲁和蒙大拿州）。一系列技术，包括在高通量DNA测序和生物信息学，微生物过程测量和现场操作中新开发的方法，将在三个不同的地点进行复制，并旨在揭示主要适用于早期微生物社区发展的广泛适用模式。 该项目将支持三名毕业生和两名本科生，包括从阿拉斯加大学的阿拉斯加分校扩大参与。此外，生态系统科学学习将扩展到一所高中，该高中通过使用最近退化的土壤作为模型系统开发新课程，从而为学生提供新课程，以了解学生的养分循环和生物多样性之间的关系，从而扩展到科学领域的学生。 PIS还将与Mendenhall游客中心的美国森林服务人员紧密合作，以将该项目的结果整合到解释性计划和展示中。