...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Annual review of marine science >Denitrification, Anammox, and N-2 Production in Marine Sediments
【24h】

Denitrification, Anammox, and N-2 Production in Marine Sediments

机译：海洋沉积物中的反硝化，厌氧氨氧化和N-2生产

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Fixed nitrogen limits primary productivity in many parts of the global ocean, and it consequently plays a role in controlling the carbon dioxide content of the atmosphere. The concentration of fixed nitrogen is determined by the balance between two processes: the fixation of nitrogen gas into organic forms by diazotrophs, and the reconversion of fixed nitrogen to nitrogen gas by denitrifying organisms. However, current sedimentary denitrification rates are poorly constrained, especially in permeable sediments, which cover the majority of the continental margin. Also, anammox has recently been shown to be an additional pathway for the loss of fixed nitrogen in sediments. This article briefly reviews sedimentary fixed nitrogen loss by sedimentary denitrification and anammox, including in sediments in contact with oxygen-deficient zones. A simple extrapolation of existing rate measurements to the global sedimentary denitrification rate yields a value smaller than many existing measurement-based estimates but still larger than the rate of water column denitrification.
机译：固定氮限制了全球海洋许多地方的初级生产力，因此它在控制大气中的二氧化碳含量方面发挥了作用。固定氮的浓度取决于两个过程之间的平衡：重氮菌将氮气固定为有机形式，以及通过反硝化生物将固定氮转化为氮气。但是，当前的沉积物反硝化速率受到的限制很有限，特别是在覆盖大部分大陆边缘的可渗透沉积物中。另外，最近已证明厌氧氨水是沉积物中固定氮损失的另一条途径。本文简要回顾了通过沉积物反硝化和厌氧氨化法（包括与缺氧区接触的沉积物中的沉积物）造成的沉积物固氮损失。将现有速率测量值简单地外推到全球沉积物反硝化速率，得出的值小于许多现有的基于测量的估计值，但仍大于水柱反硝化率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号