Denitrification and the Microbial Nitrogen Cycle in a Pelagic Oxygen Minimum Zone

小行星9530875 反硝化作用（=氧化态氮呼吸为二氮气体）导致生物圈中化合态氮的损失，而化合态氮是植物生长的关键养分。 反硝化作用的大小影响水柱中有机物的分解速率。 这些速率的变化可以改变到达深海的碳量与大气中可用的二氧化碳量之间的平衡。 该项目将在东热带北太平洋进行，那里的沃茨持续存在适当的低氧。 反硝化作用的各种测量 在这种环境下将解决 这些问题对于理解海洋中的氮和碳循环至关重要。 将使用最新的N-15技术和同位素比率质谱法来确定反硝化率。 ***

9530875 LIPSCHULTZ Denitrification (=respiration of oxidized nitrogen to dinitrogen gas) results in the loss, from the biosphere, of combined nitrogen, a critical nutrient for plant growth. The magnitude of denitrification affects the rates of decomposition of organic matter in the water column. Changes in these rates can alter the balance between the amount of carbon that reaches the deep ocean and the amount of CO2 available in the atmosphere. The project will be conducted in the Eastern Tropical North Pacific where suitably low oxygen waters persist. Various measurements of denitrification in this environment will address research questions that are crucial to understanding nitrogen and carbon cycling in the ocean. State-of-practice N-15 techniques and isotope ratio mass spectrometry will be used to determine dinitrification rates. ***