WP5 : Inverse models of the sedimentary C cycle

We will combine the framework of linear inverse modeling (LIM, 65, 66) and dynamic modeling to quantify the C flows between the various components in the sediments. LIM is particularly suited to combine various types of data, including biomass, rates, and experimental isotope tracer data to quantify element flows in a network (67). The availability of detailed quantitative estimates of functional diversity will greatly enhance our understanding of the relationship between functional microbial (but also grazer) diversity and C flow in sandy and silty food webs. All partners will deliver data in the appropriate formats to UG-MB. One of the main novelties in this project will be the direct inclusion of EPS production and consumption by microbiota. Given the high contribution of EPS production to total primary production on tidal flats (68), this will greatly contribute to the development of better C flux models for tidal flats.

• Task 5.1 – Development of a LIM of the intertidal sediment food web at high functional resolution
• Task 5.2 – Development of a dynamic tracer uptake model