Responses of two nonlinear microbial models to warming and increased carbon input
February 18, 2016
Improve understanding of significance of soil microbial processes in soil carbon responses to climate change.
- Compared two nonlinear microbial models: one based on reverse Michaelis–Menton kinetics (model A) and the other on regular Michaelis–Menton kinetics (model B).
- Used analytic approximations and numerical solutions to test CO2 efflux of both models.
- We found oscillatory responses of C pools to small perturbations in initial pool sizes, which dampen faster in model A than in model B.
- Soil warming always decreased C storage in model A, but in model B it predominantly decreased C storage in cool regions and increased C in warm regions.
- Sensitivity of maximum CO2 efflux to increased C input increased with soil temperature in model A but decreased with increased soil temperature in model B.
Wang, Y. P., J. Jiang, B. Chen-Charpentier, F. B. Agusto, A. Hastings, Forrest M. Hoffman, M. Rasmussen, M. J. Smith, K. Todd-Brown, Y. Wang, X. Xu, and Y. Q. Luo. February 18, 2016. “Responses of Two Nonlinear Microbial Models to Warming and Increased Carbon Input.” Biogeosci., 13(4):887–902. doi:10.5194/bg-13-887-2016.