Response of microbial community of tundra soil to global warming: Simulation of seasonal and long-term population dynamics
A mathematical model has been constructed and verified to simulate dynamics of a microbial community in typical tundra. The model contains the following state variables: the population densities of three competing microbial species (exemplified by Arthrobacter, Pseudomonas, and Bacillus), indexes of their physiological state, concentration of available organic substrate, plant litter reserves, the amount of microbiovorous protozoans, and temperature. The mathematical model simulates adequately the qualitative features of microbial seasonal dynamics observed in tundra. The global warming and associated increase in primary productivity, as predicted by simulation, will relieve the pressure of L-selection and thus result in stabilization of the tundra microbial community. The model also predicts that aerobic decomposition of dead organic matter in solid will be accelerated compared to its formation. 24 refs., 7 figs., 1 tab.
- OSTI ID:
- 28944
- Journal Information:
- Microbiology (New York), Journal Name: Microbiology (New York) Journal Issue: 3 Vol. 63; ISSN MIBLAO; ISSN 0026-2617
- Country of Publication:
- United States
- Language:
- English
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Tundra soil carbon is vulnerable to rapid microbial decomposition under climate warming