DISSERTATION RESEARCH: Soil Microbial Communities and Carbon Dynamics in the Southern Great Plains: Influence of Woody Plant Invasion and Prescribed Fire

论文研究：南部大平原的土壤微生物群落和碳动态：木本植物入侵和规定火灾的影响

• 批准号: 0608465
• 负责人: Thomas Boutton
• 金额: $ 0.6万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-15 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0608465&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Soil; Microbial; Communities

Woody plant encroachment into grasslands and savannas is among the most geographically extensive vegetation changes occurring in the world today, and fire is a common management tool used to control it. Both woody encroachment and fire often modify key ecosystem properties and processes such as plant species composition, plant productivity, decomposition, and nutrient cycling processes. The investigators will study the impacts of woody encroachment and fire history on the diversity and function of soil microbial communities in the southern Great Plains. New techniques using ribosomal RNA genes extracted from soils will be applied to characterize the diversity of the bacterial and fungal communities in the soil, and functional gene arrays will be used to document their functional attributes. This study will enhance fundamental understanding of the interactions and feedbacks between above- and belowground components of ecosystems, and improve abilities to manage and conserve natural resources in grassland and savanna ecosystems.

木本植物入侵草原和稀树草原是当今世界上发生的最广泛的地理植被变化之一，火是一种常用的管理工具来控制它。木本植物入侵和火通常会改变关键的生态系统特性和过程，如植物物种组成，植物生产力，分解和养分循环过程。 研究人员将研究树木入侵和火灾历史对南部大平原土壤微生物群落多样性和功能的影响。 利用从土壤中提取的核糖体RNA基因的新技术将用于表征土壤中细菌和真菌群落的多样性，功能基因阵列将用于记录其功能属性。 这项研究将加强对生态系统地上和地下组成部分之间相互作用和反馈的基本理解，并提高管理和保护草原和稀树草原生态系统自然资源的能力。