Carbon Turnover Through the Soil Microbial Community

通过土壤微生物群落的碳周转

• 批准号: 0075777
• 负责人: David Myrold
• 金额: $ 39.9万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0075777&HistoricalAwards=false
• 关键词: Carbon; Turnover; Through; Soil; Microbial

Abstract00-75777MyroldCarbon turnover through the soil microbial communityTerrestrial ecosystems are driven by inputs of organic carbon derived from their plant communities. The quantity and quality of this carbon changes during the different growth stages of the plants and is influenced by seasonal climate. The investigators hypothesize that these factors exert selective pressures on the soil microbial community and influences which microbes respond to plant carbon inputs, where such responses take place, and the fate of plant carbon in the soil. The fate of plant-derived organic carbon will be followed by labeling tall fescue grass with a stable carbon isotope and following the labeled plant carbon in shoot and root residues as they decompose. At the same time, microbial activities, community composition and turnover will be measured with a combination of molecular and biochemical techniques. The project will provide new information about how climate and plant carbon inputs interact with the microbial community to influence how carbon is processed in soil.

[摘要]土壤微生物群落的碳周转是陆地生态系统由植物群落的有机碳输入驱动的。这种碳的数量和质量在植物的不同生长阶段发生变化，并受季节气候的影响。研究人员推测，这些因素对土壤微生物群落施加了选择性压力，并影响了微生物对植物碳输入的反应，这些反应发生在哪里，以及土壤中植物碳的命运。用稳定的碳同位素标记高羊茅，并在茎部和根部残留物中跟踪标记的植物碳，以跟踪植物来源的有机碳的命运。同时，将采用分子与生物化学相结合的方法对微生物活动、群落组成和周转进行测量。该项目将提供有关气候和植物碳输入如何与微生物群落相互作用以影响碳在土壤中的加工方式的新信息。