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Elemental Co-localization of Nutrients, C, Al, and Fe in Soil Minerals with Electron Microscopy and Scatterplot-matrix Analysis

Transformation of minerals on Earth’s surface is an important process because it supplies terrestrial ecosystems with essential nutrients that are vital for the life of soil microbes and for plant growth. In addition, mineral transformation influences organic carbon capture as well as sequestration of atmospheric carbon dioxide (CO 2 ) in soils, with global impact towards reduction of CO 2 levels in atmosphere. Understanding linkages between mineral transformation, nutrient availability, and C capture in varying ecosystems can advance our knowledge on ecosystems responses to a warming climate and can guide in developing more accurate models to mitigate climate change. research is i) to gather micron to mm-scale insights on distribution of essential nutrients and C balance in soils from understudied ecosystems and ii) to interrogate the impact of bedrock on C-storage on these soils. Specifically, here we investigate the soils developed at cold wet climates of the northern latitudes, i.e. coastal temperate ecosystems. It is known that these ecosystems store significant amounts of soil C, a process that is driven by high biomass productivity during wet and warmer summer temperatures followed by cool and slow C decomposition rate during winter season. Here we study the association between minerals, nutrients, and the organic matter, which includes microbes and decaying organic material in the soil matrix, by using scanning electron microscopy (SEM) analytical tools and scatter-plot matrix analysis. To further investigate organic matter association with minerals, we combined confocal microscopy with SEM images which assessed bacterial and fungal-mineral interactions.