Fig. 2 | Nature Communications

Fig. 2

From: A moisture function of soil heterotrophic respiration that incorporates microscale processes

Fig. 2

Effects of the collocation between soil-adsorbed organic carbon (SOC) and microorganisms on the SOC–microorganism collocation factor a. SOC and microorganisms are a uniformly allocated in the simulated soil core, b allocated in ten connected sections, c allocated in two connected sections, and d allocated in two separate sections. e The relative heterotrophic respiration (HR) rates change with the relative water content for the different allocations of SOC and microorganisms in ad. The blue circles, red squares, black triangles, and pink crosses represent the simulated HR–moisture relationships obtained by the microscale model (see Methods section) for the different collocations in ad, respectively. The simulated HR rates were calculated by averaging the CO2 flux at the soil–atmosphere interface of the soil core. The solid curves represent the moisture function, fm, with fitted a, a = 0, 0.40, 0.72, and 0.97, via the linear least-square regression

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