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Isotopes of dissolved oxygen as dynamic tracers for aerobic turnover in surface and shallow groundwaters (IsoDO)

溶解氧同位素作为地表水和浅层地下水有氧转换的动态示踪剂 (IsoDO)

基本信息

批准号：
290026025
负责人：
Professor Johannes Barth, Ph.D.
金额：
--
依托单位：
Department Hydrogeologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2015
资助国家：
德国
起止时间：
2014-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/290026025?language=en
关键词：
Isotopes dissolved oxygen dynamic tracers

项目摘要

Steep gradients of dissolved oxygen (DO) indicate that critical zones of aerobic activity exist in riparian and hyporheic subsurface environments. These important zones need new tools to quantify sources and sinks of dissolved oxygen as a key parameter for aquatic biogeochemical activity. Together with concentration measurements, we plan to investigate stable isotope ratios of DO together with those of dissolved and particulate carbon in order to trace their biological components. The approach enables quantification of atmospheric and photosynthetic sources of DO. In addition, systematic 18O-enrichment in the DO pool will quantify aerobic respiration rates. The survey will focus on the Selke River field laboratory in the Harz Mountains with riparian, ripple and in- as well as below stream sampling. The work aims to investigate the hypothesis of biological controls on oxygen and related carbon dynamics in continental waters. The approach will enable to differentiate and quantify rates of oxygen consumption and input that will also be verified with reactive transport models. Applied and tested methods will also be available to investigations of other aquatic systems including lakes, rivers and groundwaters.

溶解氧（DO）的陡梯度表明，在河岸和潜流地下环境中存在的有氧活动的关键区域。这些重要区域需要新的工具来量化溶解氧的来源和汇，作为水生生物地球化学活动的关键参数。与浓度测量一起，我们计划调查溶解氧的稳定同位素比以及溶解碳和颗粒碳的稳定同位素比，以追踪它们的生物成分。该方法能够量化的大气和光合源的DO。此外，DO池中的系统18O富集将量化有氧呼吸速率。调查将集中在哈尔茨山脉的塞尔克河野外实验室，进行河岸、涟漪和溪流内以及溪流下的采样。这项工作的目的是调查的假设，生物控制的氧气和相关的碳动力学在大陆沃茨。该方法将能够区分和量化氧气消耗和输入的速率，这也将通过反应性运输模型进行验证。应用和测试的方法也将用于其他水生系统的调查，包括湖泊，河流和地下水。

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

River recharge versus O2 supply from the unsaturated zone in shallow riparian groundwater: A case study from the Selke River (Germany).

DOI：
10.1016/j.scitotenv.2018.03.230
发表时间：
2018-09
期刊：
The Science of the total environment
影响因子：
0
作者：
Michael Mader;André M. Roberts;David Porst;C. Schmidt;N. Trauth;R. van Geldern;J. Barth
通讯作者：
Michael Mader;André M. Roberts;David Porst;C. Schmidt;N. Trauth;R. van Geldern;J. Barth

A new approach to quantify system efficiency with dissolved oxygen isotopes during engineered growth of Galdieria sulphuraria

在 Galdieria sulfuraria 工程化生长过程中用溶解氧同位素量化系统效率的新方法