A model of oxygen reduction, denitrification, and organic matter mineralization in marine sediments1
A model of oxygen reduction, denitrification, and organic matter mineralization in marine sediments1
复制标题
海洋沉积物中氧还原、反硝化和有机物矿化的模型1
DOI：
10.4319/lo.1982.27.4.0610
复制
发表时间：
1982
影响因子：
4.5
通讯作者：
J. Murray
中科院分区：
文献类型：
--
作者：
R. Jahnke;S. Emerson;J. Murray
孔隙水养分剖面是沉积物中有机质降解的敏感指标。为了解释这些数据，我们推导了一个氧还原、硝化和反硝化的动力学模型，该模型定量地将氧还原和反硝化的速率与分离这些过程的深度和碳氧化速率联系起来。
Porewater nutrient profiles are sensitive indicators of organic matter degradation in sediments. To interpret these data, we have derived a kinetic model of oxygen reduction, nitrification, and denitrification which quantitatively relates the rates of oxygen reduction and denitrification to the depth separating these processes and the carbon oxidation rate.
We have compared model profiles with porewater profiles of the sum of NO2−, NO3−, and NH4+ (∑N) from both Atlantic and Pacific Ocean stations. Calculated rates of oxygen reduction and denitrification vary proportionally at these stations. Extrapolation along this relationship predicts a maximum in NO3− even where the nitrification zone is so thin that only a decrease from bottom water samples is measured with a 1–2-cm sampling interval. The model also predicts that the maximum amount of organic matter that can be oxidized by denitrification is only 30% of that oxidized by oxygen respiration in the Pacific and only 13% in the Atlantic Ocean.