Dissertation Research: Microbial Activity on Wood in Streams: Exploring Abiotic and Biotic Factors Affecting the Structure and Function of Wood Biofilms

论文研究：溪流中木材的微生物活性：探索影响木材生物膜结构和功能的非生物和生物因素

• 批准号: 9423518
• 负责人: Jackson Webster
• 金额: $ 1.09万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-03-15 至 1997-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9423518&HistoricalAwards=false
• 关键词: Dissertation; Research; Microbial; Activity; Wood

WEBSTER & TANK Woody debris is an integral part of most stream ecosystems. In many streams and rivers, the highest densities and rates of production for aquatic invertebrates are associated with wood. For many aquatic invertebrates, their food base is the microbial biofilm on the surfaces of woody debris. The factors which affect the structure and function, both biological and non-biological, of these biofilms has received little consideration. This project uses measurements of microbial growth and activity to experimentally test the roles of factors such as light levels, burial, leaf litter abundance, and wood type on biofilms in stream ecosystems. This research is important because it tests some of the possible causes and mechanisms for the high rates of production associated with woody debris. Human management activities and natural disturbances affect such variables as the amount of light reaching a stream, the types and amount of vegetation, and the rates of sediment input. How these impacts might resonate through the stream ecosystem will be focused on woody debris since this habitat is a region of high biological activity. This research looks closely at this link and possible factors influencing microbial growth rates and rates of activity at this crucial interface.

WEBSTER & TANK 木质残骸是大多数溪流生态系统不可分割的一部分。在许多溪流和河流中，水生无脊椎动物的最高密度和生产率与木材有关。对于许多水生无脊椎动物来说，它们的食物基础是木质残骸表面的微生物生物膜。影响这些生物膜的生物和非生物结构和功能的因素很少受到考虑。该项目利用微生物生长和活动的测量来通过实验测试光照水平、埋藏、落叶丰度和木材类型等因素对溪流生态系统中生物膜的作用。 这项研究很重要，因为它测试了与木质碎片相关的高生产率的一些可能原因和机制。人类管理活动和自然干扰会影响到达溪流的光照量、植被类型和数量以及沉积物输入速率等变量。这些影响如何通过溪流生态系统产生共鸣将集中在木质残骸上，因为该栖息地是生物活动高度活跃的区域。这项研究密切关注这一联系以及影响这一关键界面微生物生长速率和活动速率的可能因素。