Verlässliche Abschätzung von CH4-Bilanzen für Ökosysteme auf der Basis der Extrapolation von Punktmessungen unter Benutzung von Vegetationsmustern und weiteren Umweltparametern

基于使用植被模式和其他环境参数的点测量外推，可靠地估计生态系统的 CH4 平衡

• 批准号: 177406452
• 负责人: Dr. Gerald Jurasinski
• 金额: --
• 依托单位: Institut für Botanik und Landschaftsökologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/177406452?language=en
• 关键词: Verl; ssliche; Absch; tzung; von

Gas fluxes and matter balances of ecosystems are of crucial importance for the evaluation of the climate impact of land use under predicted climate change. Closed chamber (CC) and eddy covariance (EC) measurements are the two most widely used methods to assess greenhouse gas (GHG) emissions from ecosystems. CC measurements exhibit a considerable spatial and temporal variability caused by the phenological development (temporal variability) and by the spatial variability of the vegetative cover and their associated micro-organism communities. In the planned project the vegetation composition of a degraded, rewetted, brackish fen shall be used - together with continuous maps of relevant environmental parameters - as a proxy to extrapolate CC measurements of CH4 flux rates to obtain reliable CH4 emission estimates for the ecosystem/habitat scale. The vegetation assessment is carried out in a regular equidistant grid. The relationship between CH4 emissions and vegetation composition and further environmental parameters is modeled under the consideration of spatial effects with regression kriging. Our results will help to obtain better, more exact, and thus, more reliable CH4 balances by upscaling of point measurements (CC) to the ecosystem scale whilst allowing to attribute the emitted CH4 to plant community characteristics.

生态系统的气通量和物质平衡对于评估在预测气候变化下土地利用的气候影响至关重要。封闭室（CC）和涡流协方差（EC）测量是评估生态系统中温室气体（GHG）排放的两种最广泛使用的方法。 CC测量结果表现出由物候发育（时间变异）以及营养覆盖物及其相关微生物群落的空间变异性引起的相当大的空间和时间变异性。在计划的项目中，应使用降解，重新润断，咸淡的FEN的植被组成 - 以及相关环境参数的连续图 - 作为推断CC测量CH4通量速率的代理，以获得可靠的CH4排放估算值的生态系统/生境量表。植被评估是在常规等距网格中进行的。 CH4排放与植被组成与进一步的环境参数之间的关系是根据回归kriging考虑的空间效应的。我们的结果将有助于通过将点测量值（CC）提高到生态系统量表，从而获得更好，更精确的CH4余额，从而获得更可靠的CH4余额，同时允许将发射的CH4归因于植物社区特征。

项目成果

Vegetation controls methane emissions in a coastal brackish fen

植被控制沿海咸湿沼泽的甲烷排放

• DOI: 10.1007/s11273-013-9304-8
• 发表时间: 2013
• 期刊: Wetlands Ecology and Management
• 影响因子: 1.8
• 作者: Koebsch F;Glatzel S;Jurasinski G
• 通讯作者: Jurasinski G

Controls for multi-scale temporal variation in ecosystem methane exchange during the growing season of a permanently inundated fen

• DOI: 10.1016/j.agrformet.2015.02.002
• 发表时间: 2014-05
• 期刊: Agricultural and Forest Meteorology
• 影响因子: 6.2
• 作者: F. Koebsch;G. Jurasinski;M. Koch;Joachim Hofmann;S. Glatzel

Spatial Variability of Annual Estimates of Methane Emissions in a Phragmites Australis (Cav.) Trin. ex Steud. Dominated Restored Coastal Brackish Fen

• DOI: 10.1007/s13157-014-0528-z
• 发表时间: 2014-03
• 期刊: Wetlands
• 影响因子: 2
• 作者: S. Koch;G. Jurasinski;F. Koebsch;M. Koch;S. Glatzel

CO2 exchange of a temperate fen during the conversion from moderately rewetting to flooding

从适度再润湿到淹没过程中温度分界的 CO2 交换

• DOI: 10.1002/jgrg.20069
• 发表时间: 2013
• 期刊: Journal of Geophysical Research: Biogeosciences
• 作者: Koebsch F;Glatzel S;Hofmann J;Forbrich I;Jurasinski G
• 通讯作者: Jurasinski G