291168 20240928180704.0 G:(GEPRIS)276973106 G:(GEPRIS)276973106 276973106 GEPRIS http://gepris.its.kfa-juelich.de Differenzierung der Rolle organischer Nuclei und der Mineraloberflächen bei der Bildung von Mikroaggregaten durch Untersuchung ihrer Element- und Isotopenzusammensetzung 2015 - 2020 Professorin Dr. Ingrid Kögel-Knabner DFG project G:(GEPRIS)276973106 d 2015 - 2020 Deutsche Forschungsgemeinschaft I:(DE-588b)2007744-0 DFG G:(GEPRIS)251268514 FOR 2179: MAD Soil - Microaggregates: Formation and turnover of the structural building blocks of soils t With this proposal we aim to elucidate governing processes and mechanisms for the formation of soil microaggregates by means of the analysis of elemental/isotopic composition and the three-dimensional structural association of organic and mineral soil components at submicron resolution. We will specifically focus our approach on the analytical power of NanoSIMS in order to elucidate soil microaggregate structure and composition. This spatially explicit data will be supplemented by bulk scale measurements, such as 13C-NMR. We intend to reveal the dynamics of soil microaggregate formation and turnover by applying our analytical approach to the natural soil materials from the chronoseqence and toposequence approaches of the research unit and for multi-isotope labelled microaggregates isolated from soils from the central microcosm experiments of the research unit. The data collected will enable us to define relevant statistical relationships regarding the functions of soils as being carbon sinks, habitats for microorganisms and the water storage and transport function. The developed indexes and identified mechanistic relationships will form an integral part of the mechanistic quantitative model developed in PM. oai:juser.fz-juelich.de:957911 authority:GRANT authority G AUTHORITY oai:juser.fz-juelich.de:957911