How Ingested Soil Microbes Stimulate Greenhouse Gas Emissions and Iron Transformations of Earthworms

摄入的土壤微生物如何刺激温室气体排放和蚯蚓的铁转化

• 批准号: 53162670
• 负责人: Professor Dr. Harold L. Drake
• 金额: --
• 依托单位: Institut für Mikrobiologie (ifmb)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/53162670?language=en
• 关键词: How; Ingested; Soil; Microbes; Stimulate

Up to approximately 50% of soil-emitted nitrous oxide (N2O) might be derived from earthworms, a soil macrofauna that ingests soil microbial biomes. In the previous funding period, synergistic links were established between ingested denitrifiers and the emission of N2O and dinitrogen (N2) by earthworms. The new objectives (in abstracted form) are: to determine if earthworms emit nitric oxide (NO); to identify regulatory parameters responsible for changes in the structure and function of ingested microbial biomes associated with C- and N-transformations in the gut (molecular, microsensor, and reporter strain technologies; PCR-assisted isolation of target organisms); to correlate earthworm abundances with N2O and NO emissions in the field; to determine if earthworm ecotypes affect in situ gradients of nitrate, N2O, and O2 in casts and burrow-associated soils (wormsoil chambers, microsensors); to assess N2O emissions of worms from southern and northern hemispheres, and evaluate the microbes associated with these emissions (functional gene fingerprinting). This study will resolve primary links between C- and N-driven microbial processes that yield nitrogenous gases in the earthworm gut.

大约50％的土壤液化一氧化二氮（N2O）可能源自earth，这是一种摄入土壤微生物生物群落的土壤大氟纳那。在上一个融资期间，摄入的脱脂剂与通过earth的N2O和Dinitrogen（N2）的排放之间建立了协同联系。新目标（以抽象形式）是：确定earth是否发出一氧化氮（NO）；确定负责与肠道中与C-和N转化相关的摄取的微生物生物群落结构和功能变化的调节参数（分子，微传感器和报告菌株技术； PCR辅助靶向生物体的隔离）；将earth的丰富与N2O相关联，并且没有排放；确定earth生态型是否会影响硝酸盐，N2O和O2的原位梯度在铸造和与洞穴相关的土壤中（蠕虫室，微传感器）；评估来自南半球和北半球的蠕虫的N2O排放，并评估与这些排放相关的微生物（功能基因指纹）。这项研究将解决C-和N驱动的微生物过程之间的主要联系，这些微生物过程产生earth肠中的氮气。