RAPID: Nitrogen Cycling Immediately after Fire in an Alberta Bog

快速：艾伯塔省沼泽火灾后立即进行氮气循环

• 批准号: 1143719
• 负责人: R. Kelman Wieder
• 金额: $ 6.98万
• 依托单位: Villanova University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-08-01 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1143719&HistoricalAwards=false
• 关键词: RAPID; Nitrogen; Cycling; Immediately; after

Globally, peatlands cover 3-4 % of the Earth?s land surface, yet they store 25-30% of the world?s soil carbon (C) and 9-16% of the world?s soil nitrogen (N) in peat. The cycling of C, and in particular the strength of the bog C sink, changes dramatically and predictably as a function of time since fire. However, understanding of how N cycling changes in bogs as a function of time since fire is unknown. This is a Rapid Response Research (RAPID) award to support a project to study carbon (C) and nitrogen (N)cycling at Utikuma Bog, in western Alberta Canada. The site represents an unique opportunity for research on linked bog N and C cycling in light of the recent wildfire activity which decimated the site, the historically low atmospheric N deposition (1 kg/ha/yr), which anchors the site as a global end-member in the spectrum of atmospheric N deposition, and because of the large stores of C found in Canadian peatlands. Peatlands of the boreal forest are vital to global terrestrial N and C balances, and the vulnerability of the large amounts of N and C stored in peat deposits has both science and policy implications. With RAPID funding to initiate investigations at the burned Utikuma Bog, this project is expected to transform current understanding of bog N cycling, which has largely ignored the potential ramifications of fire in boreal bogs of western Canada. The project will also support one M.S. student at Villanova University and one undergraduate lab/field assistant.

在全球范围内，泥炭地占地3-4％的土地表面，但它们存储了世界上25-30％的土壤碳（C）和世界9-16％的土壤氮（N）。 C的循环，尤其是沼泽C下沉的强度，自火以来随时间的函数而发生了巨大可预测的变化。但是，了解n循环在沼泽中如何变化随时间的变化，因为火是未知的。 这是一项快速响应研究（快速）奖，以支持在加拿大艾伯塔省西部的Utikuma Bog研究碳（C）和氮（N）骑自行车的项目。 鉴于最近的野火活动，该站点是一个独特的研究机会，可以研究该地点的近期野火活动，即历史悠久的大气N沉积（1 kg/ha/yr），将该地点锚定为大气N沉积频谱中的全球最终成员，以及在Canadian Peatlands中发现的大量商店。北方森林的泥炭地对于全球陆地N和C平衡至关重要，并且在泥炭矿床中存储的大量N和C的脆弱性具有科学和政策的影响。通过迅速的资金来开始对燃烧的Utikuma Bog进行调查，该项目有望改变对沼泽N自行车的当前理解，这在很大程度上忽略了加拿大西部北方沼泽中火灾的潜在影响。该项目还将支持一个硕士维拉诺瓦大学的学生和一名本科实验室/现场助理。