Potential effects of simulated warming on soil fungal community diversity

The survival, growth, and development of soil fungi are very sensitive to environmental changes. Indoor simulation heating method was used in this study, amplicon sequencing and bioinformatics methods were used to explore the response characteristics of soil fungal communities to temperature changes, identify the core fungal groups in temperaturesensitive soil, and elucidate the potential effects of temperature on soil fungal diversity. The results showed that there was no significant difference in soil fungal diversity (P>0.05) under six temperature treatments (T0, T8, T16, T24, T32, T 40), and the soil fungal community abundance was the lowest in T0. Among soil fungi, Ascomycota, Basidiomycota, and Chytridiomycota are high-temperature tolerant fungi, and Gibberella and Microidium are low temperatures loving fungi. The relative abundance of dominant fungal communities showed significant differences under different temperature gradients, the relative abundance of Tomentella showed a U-shaped trend of decreasing first and then increasing; the relative abundance of Gibberella showed a downward trend as a whole and reached the minimum value of 0.9424% at T40; the relative abundance of Madurella showed an overall upward trend, and reached the maximum value of 0.4918% under T40 treatment, which was significantly higher than that under other treatments (T0- T32). The effect of temperature on soil fungal community became more obvious with the decrease of classification level of fungi. The higher the classification level, the influence of temperature will be weakened to a certain extent. In conclusion, soil key dominant bacteria can adjust their relative abundance according to their adaptability to temperature, change the soil fungal community structure, and then make positive or negative responses.