Linking Nitrogen Availability, Litter Chemistry, and Decomposer Organisms to Explain the Inconsistent Effect of Nitrogen Addition on Litter Decomposition

将氮的有效性、凋落物化学和分解生物联系起来，解释氮添加对凋落物分解的不一致影响

• 批准号: 0224917
• 负责人: Serita Frey
• 金额: $ 19.22万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0224917&HistoricalAwards=false
• 关键词: Linking; Nitrogen; Availability; Litter; Chemistry

Inputs to the global nitrogen cycle have increased significantly due to human activities and there are many uncertainties in our knowledge of how this nitrogen enrichment will impact terrestrial biotic communities and ecosystem function. Among these is the impact that nitrogen enrichment is having on decomposer organisms and the litter decomposition process. The overall objective of this research is to examine how plant litter chemistry (lignin and nitrogen content) and external nitrogen availability interact to impact the composition and/or activity of the litter microbial community. Because nutrient cycles are being significantly altered by human activities, basic ecological research is needed to determine whether anthropogenic disturbance is impairing the ability of ecosystems to function sustainably. This research will contribute to our understanding of how decomposer microorganisms respond to nitrogen additions and to enhance our ability to predict how nitrogen enrichment impacts the litter decomposition process.

由于人类的活动，全球氮周期的投入大大增加了，并且在我们了解这种氮富集如何影响地面生物群落和生态系统功能的知识中存在许多不确定性。 其中包括氮富集对分解生物和垃圾分解过程的影响。 这项研究的总体目的是研究植物垃圾化学（木质素和氮含量）和外部氮的可用性如何影响垃圾微生物群落的组成和活动。 由于人类活动正在显着改变养分周期，因此需要基本的生态研究来确定人为障碍是否损害了生态系统可持续运行的能力。 这项研究将有助于我们理解分解体微生物如何对氮的添加反应，并增强我们预测氮富集如何影响垃圾分解过程的能力。