Microbial Communities associated with Atmospheric Biogenic Sugar (ABS) - Raw sequence reads
Tropospheric particulate matter (PM) is at the root of many impacts on climate change, health effects, dispersion of pollutants, or damages to the environment. However, the main component by mass of PM, the organic matter (OM) is still poorly known, and several of its direct sources or formation processes in situ are not understood nor their emission fluxes quantified. While the formation of Secondary Organic Aerosol (SOA) is largely studied, the Primary Biogenic Organic Aerosol (PBOA) is still disregarded, and not at all included in Chemical Transport Model (CTM), while studies point out to its large importance for the OM fraction.Further, we know now that a large part of this PBOA is clearly related to fungi emission sources, with strong connections between some sugars / sugar alcohols (S/SA) and specific species / genus of fungi, and seasonal cycles of S/SA concentrations are directly related to large biomes. However, this link has only been characterized for a limited number of cases and S/SA, and the main drivers of many S/SA in PM have not all been identified, although vegetation seems to be strongly involved. Currently, the mechanisms of microorganism emissions (along with their organic cortege) to the atmosphere and their fate and transfer to other ecosystem compartments remain poorly understood, especially in cold environments. We will investigate these chemistry - microbiology links in PM during this ABS project.