权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Quantification and regulation of carbon fluxes in Lake Windsborn (Eifel): do hot spots and hot moments of carbon cycling occur in shallow waters?

温兹伯恩湖（埃菲尔湖）碳通量的量化和调节：碳循环的热点和热点时刻是否发生在浅水区？

基本信息

批准号：
282994351
负责人：
Professor Dr. Klaus-Holger Knorr, since 8/2016
金额：
--
依托单位：
Institut für Landschaftsökologie
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/282994351?language=en
关键词：
Quantification regulation carbon fluxes Lake

项目摘要

Recently it has been discovered that small aquatic ecosystems cover much larger areas than previously assumed. Due to this fact and their high metabolic activity, they are most likely significant sinks for carbon and sources of methane and may provide relevant feedback in the climate-biosphere system. The role of these systems is so far poorly understood because they fall between disciplinary boundaries of terrestrial ecosystem science and limnology. To begin rectifying our knowledge deficiency the project will quantify the gas exchange between water and the atmosphere and sediment and surface waters in a shallow dystrophic model system and establish controls on CO2 and CH4 emission and carbon sequestration throughout the year. In this analysis we focus on periods and zones that have great influence on annual balances of carbon, such as ice breakup, spring and fall. To this end most recent advances in the application of sensor systems and high resolution gas flux chamber measurements will be employed that will allow for novel insights in the functioning of the carbon cycle. Carbon fluxes will be related to environmental variables and internal biological and physical dynamics. Moreover, we will focus on methanogenesis, methane oxidation and transport, which are key processes for the greenhouse warming potential of these systems. In this respect, mass balances, pore water analysis and modeling, incubation techniques and application of 13C stable isotope balances are combined to quantify these processes and their dependencies on environmental conditions. The research will thus address an important knowledge deficiency that potentially hampers assessments about climate-biosphere interactions.

最近人们发现，小型水生生态系统覆盖的面积比以前设想的要大得多。由于这一事实及其高代谢活性，它们很可能是重要的碳汇和甲烷源，并可能在气候-生物圈系统中提供相关反馈。这些系统的作用是迄今为止知之甚少，因为它们属于陆地生态系统科学和湖沼学的学科边界。为了开始纠正我们的知识不足，该项目将在一个浅营养不良模型系统中量化水与大气、沉积物与地表沃茨之间的气体交换，并建立对全年CO2和CH 4排放和碳固存的控制。在这项分析中，我们专注于对年度碳平衡有很大影响的时期和区域，如冰破裂，春季和秋季。为此，传感器系统和高分辨率气体通量室测量的应用中的最新进展将被采用，这将允许在碳循环的功能新的见解。碳通量将与环境变量和内部生物和物理动态有关。此外，我们将专注于甲烷生成，甲烷氧化和运输，这是这些系统的温室效应的关键过程。在这方面，质量平衡，孔隙水分析和建模，孵化技术和应用13 C稳定同位素平衡相结合，以量化这些过程及其对环境条件的依赖性。因此，这项研究将解决一个重要的知识缺陷，这可能会阻碍对气候-生物圈相互作用的评估。