An empirical model to predict methane production in inland water sediment from particular organic matter supply and reactivity
An empirical model to predict methane production in inland water sediment from particular organic matter supply and reactivity
复制标题
根据特定有机物供应和反应性预测内陆水沉积物中甲烷产量的经验模型
DOI：
10.1002/lno.11905
复制
发表时间：
2021
影响因子：
4.5
通讯作者：
S. Sobek
中科院分区：
文献类型：
--
作者：
C. Grasset;Simone Moras;A. Isidorova;R. Couture;Annika Linkhorst;S. Sobek
缺氧内陆水域表面沉积物中的 CH4 生产率最高，但没有模型能够量化缺氧沉积物上新鲜特定有机物 (POM) 沉积后的 CH4 产量。这限制了我们模拟从内陆水域到大气中的 CH4 排放的能力。为了生成这样的模型，我们通过使用不同数量的水生和陆地 POM 以不同频率修正沉积物，量化了 POM 供应率和 POM 反应性如何控制缺氧表层沉积物中 CH4 的产生。从模拟的 CH4 生产中，我们得出了与 CH4 生产动力学和程度相关的参数。我们表明，CH4 的产生程度可以通过供给缺氧沉积物的 POM 的质量（即 C/N 比）和数量来很好地预测。特别是，在水生系统中的沉降速率范围内，我们发现 CH4 产量随着浮游植物来源和陆地来源的 POM 的数量线性增加。自然系统中常见的情况是频繁添加 POM，导致 CH4 生产率峰值更高。这表明，早期仅添加一次 POM 的孵化实验得出的关系可能会导致低估沉积物 CH4 产量。我们的结果定量地将缺氧表层沉积物中的 CH4 产生与 POM 沉积通量耦合起来，因此可用于进一步开发内陆水域 CH4 排放的机理模型。
The highest CH4 production rates can be found in anoxic inland water surface sediments however no model quantifies CH4 production following fresh particular organic matter (POM) deposition on anoxic sediments. This limits our capability of modeling CH4 emissions from inland waters to the atmosphere. To generate such a model, we quantified how the POM supply rate and POM reactivity control CH4 production in anoxic surface sediment, by amending sediment at different frequencies with different quantities of aquatic and terrestrial POM. From the modeled CH4 production, we derived parameters related to the kinetics and the extent of CH4 production. We show that the extent of CH4 production can be well predicted by the quality (i.e., C/N ratio) and the quantity of POM supplied to an anoxic sediment. In particular, within the range of sedimentation rates that can be found in aquatic systems, we show that CH4 production increases linearly with the quantity of phytoplankton‐derived and terrestrially derived POM. A high frequency of POM addition, which is a common situation in natural systems, resulted in higher peaks in CH4 production rates. This suggests that relationships derived from earlier incubation experiments that added POM only once, may result in underestimation of sediment CH4 production. Our results quantitatively couple CH4 production in anoxic surface sediment to POM sedimentation flux, and are therefore useful for the further development of mechanistic models of inland water CH4 emission.
影响因子：
16.6
作者：
Aben RCH;Barros N;van Donk E;Frenken T;Hilt S;Kazanjian G;Lamers LPM;Peeters ETHM;Roelofs JGM;de Senerpont Domis LN;Stephan S;Velthuis M;Van de Waal DB;Wik M;Thornton BF;Wilkinson J;DelSontro T;Kosten S
通讯作者：
Kosten S
影响因子：
4.9
作者：
Abril, G.;Bouillon, S.;Borges, A. V.
通讯作者：
Borges, A. V.
气候驱动的沉积物化学变化提高了北部湖泊的甲烷产量
DOI：
10.1101/161653
发表时间：
2017
期刊：
--
影响因子：
--
作者：
Emilson E
通讯作者：
Emilson E