Nitrification Rates and Controls: The Deep Oligotropic Nitrogen Cycle

硝化速率和控制：深层寡变氮循环

• 批准号: 9000217
• 负责人: Oliver Zafiriou
• 金额: $ 62.2万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-12-15 至 1995-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9000217&HistoricalAwards=false
• 关键词: Nitrification; Rates; Controls; Deep; Oligotropic

Nitrification Rates and Controls: The Deep Oligotropic NitrogenCycle Water.column nitrification (NH.3 .. N0.2 and N0..2 .. N0>0.3) is thecrucial biogeochemical PON/DON sink and source of N0.3 for newprimary production. Measuring these rates directly will requireadvances in (1) measuring substrate levels, (2) detecting smallchanges in incubations, and (3) >in situ> incubation technology. The first real nitrification rates in the subsurface Nremineralization region will use new .1.5N..1.80.2 double.labellingisotope techniques. Natural rates of N0.2 oxidation will bedetermined from transformation of tracer.level .1.5N.1.80..2 to.1.5N..1.80.3; isotope dilution of .1..5N.1.8.0.2 and ıN0.2! pool size changeswill give rates of oxidation of NH.3 to NO.2. Time.course >in situ>incubations will utilize a modified Taylor/Doherty SubmersibleIncubation Device (SID)...

硝化速率和控制：深层寡营养 氮循环 水柱硝化（NH.3.. N0.2和N 0..二... N 0>0.3）是 氮源和氮汇的关键生态化学作用 新的初级生产 直接测量这些比率将 要求（1）测量底物水平，（2）检测 孵育过程中变化不大，（3）>原位>孵育 技术.地下的第一个真实的硝化速率 Necrosalization区域将使用新的.1.5N.. 1.80.2 双标记同位素技术。 N0.2的自然率 根据示踪剂水平的变化来确定氧化程度 .1.5N.1.80.. 2至1.5N.. 1.80.3;同位素稀释度为.1。5N.1.8.0.2 0.2！池大小的变化将给出NH.3的氧化速率 到NO.2 时间过程>原位>孵育将利用 改进型Taylor/Doherty潜水培养装置（SID）