The Influence of Microarthorpod-Microbial Interactions on Forest Floor Nitrogen Dynamics

微节肢动物-微生物相互作用对森林地面氮动态的影响

• 批准号: 8714663
• 负责人: D. Crossley
• 金额: $ 8万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-12-15 至 1989-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8714663&HistoricalAwards=false
• 关键词: Influence; Microarthorpod; Microbial; Interactions; Forest

Microarthropods influence rates of soil organic matter decomposition and nutrient release in forest ecosystems. Their most important effects are assumed to occur through interactions with the microflora. Although microarthropods generally increase decomposition rates of litter, their effects on nutrient fluxes in the forest floor have not been well documented. This is especially true for nitrogen, which is often immobilized in decaying litter during the initial stages of decomposition. This one-year project will test and develop the methods for the long range study and will focus on: 1) identifying and quantifying potential non-target effects of naphthalene using both field and laboratory approaches, 2) completing a one-year field study of the effects of microarthropod exclusion on litter decomposition rates, the microbial decomposer community, and nitrogen dynamics in litter and soil pools, and 3) using 15N in conjunction with the litterbasket technique to quantify the effects of microarthropod exclusion on immobilization and movement through the forest floor profile of exogenous sources of nitrogen. Experiments will also be completed on the 15N labeling of litter for use in long-term studies of decomposition and nitrogen mineralization. //

微型节肢动物对土壤有机质含量的影响 分解和养分释放的森林生态系统。 他们的 大多数重要的影响被认为是通过相互作用发生的 微生物群落 虽然微型节肢动物通常会增加 凋落物分解速率及其对养分通量的影响 森林地表的生物多样性还没有得到很好的记录。 这是 尤其是氮，它往往是固定在 在分解的最初阶段腐烂的枯枝落叶。 这 一个为期一年的项目将测试和发展的方法，为长期 范围研究，将侧重于：1）确定和量化 萘的潜在非靶效应， 实验室方法，2）完成为期一年的实地研究， 排除微型节肢动物对凋落物分解的影响 速率、微生物分解者群落和氮动态 3）15N与 垃圾篮技术，以量化的影响， 排除微节肢动物的固定和运动， 外源氮源的森林地表剖面。 实验也将完成对15 N标记的垃圾 用于长期研究分解和氮 成矿 //