Dissolved carbon as a component of net biome productivity of major land use systems

溶解碳作为主要土地利用系统净生物群落生产力的组成部分

• 批准号: 17813416
• 负责人: Dr. Klaus Kaiser
• 金额: --
• 依托单位: Institut für Bodenkunde und Bodenerhaltung
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/17813416?language=en
• 关键词: Dissolved; carbon; component; net; biome

Atmosphere-based estimates of carbon (C) sequestration in terrestrial ecosystems are larger than land-based estimates, which is attributed to `missing fluxes¿ that are not accounted for in present analysis. The transfer of dissolved organic and inorganic C from terrestrial settings to the hydrosphere through soils might well explain the differences in estimates of C sequestration. However, studies of dissolved C fluxes are almost exclusively from temperate forest ecosystems and non of these studies related dissolved C fluxes to local estimates of C sequestration. Also, little is known about dissolved C export to the hydrosphere from soil under different land use. Our hypotheses are i) export of dissolved C from soils fills the gap between atmosphere-based and land-based estimates of C sequestration; ii) land use modifies fluxes of dissolved C from soils in the order arable land > grassland > deciduous forest > coniferous forest. These hypotheses will be tested by determining fluxes of dissolved C from soils in relation to estimates of net biome productivity of 13 sites of different land use

基于大气的陆地生态系统碳固存估计数大于基于陆地的估计数，这是由于本分析中没有考虑到“缺失通量”。溶解的有机和无机碳从陆地设置到水圈通过土壤的转移可能很好地解释了估计的C螯合的差异。然而，溶解碳通量的研究几乎完全是从温带森林生态系统和非这些研究相关的溶解碳通量，以当地的估计碳封存。此外，鲜为人知的是，溶解C输出到水圈从不同的土地利用下的土壤。我们的假设是：（1）土壤溶解态C的输出填补了基于大气和基于陆地的C固存估算之间的差距;（2）土地利用对土壤溶解态C通量的影响顺序为耕地>草地>落叶林>针叶林。这些假设将通过确定土壤中溶解碳的通量与13个不同土地利用地点的净生物群落生产力的估计进行检验

项目成果

Dissolved carbon leaching from soil is a crucial component of the net ecosystem carbon balance

• DOI: 10.1111/j.1365-2486.2010.02282.x
• 发表时间: 2011-02-01
• 期刊: GLOBAL CHANGE BIOLOGY
• 影响因子: 11.6
• 作者: Kindler, Reimo;Siemens, Jan;Kaupenjohann, Martin
• 通讯作者: Kaupenjohann, Martin