The impact of forest fire smoke deposition on soil microorganisms
The impact of forest fire smoke deposition on soil microbial carbon conversion is manifested in multiple aspects. Firstly, the organic carbon and black carbon particles in smoke are directly input into the soil, providing new carbon sources for microorganisms and affecting their carbon metabolism and biomass. Meanwhile, smoke may alter the physical and chemical properties of soil, such as pH, soil moisture, and nutrient content, which can affect the growth environment and metabolic activity of microorganisms. In addition, smoke deposition may also alter the structure of soil microbial communities. Some microorganisms may be more sensitive to harmful substances in smoke, while others may utilize carbon sources in smoke to multiply and increase, thereby altering community composition. The black carbon and organic carbon in smoke may also interfere with the carbon cycling process in soil, such as reducing the decomposition rate of organic carbon, thereby altering the storage and release patterns of soil carbon. Finally, the impact of smoke deposition on microbial communities may also alter key biogeochemical functions in soil, such as nitrogen cycling and phosphorus release, indirectly affecting plant nutrient uptake and growth. Therefore, the impact of forest fire smoke deposition on soil microbial carbon conversion is complex and long-term, and is closely related to the frequency and intensity of forest fires.