The effects of Typhoon Doksuri on soil respiration in a subtropical forest.

Typhoons would alter soil respiration by altering forest structure and tree growth. However, there is limi-ted information on how typhoon will alter soil respiration under global warming with increasing intensity and frequency of typhoons in the future. We examined the effects of Typhoon Doksuri and soil warming (+4 ℃ via cable warming) on soil respiration in a subtropical broadleaf evergreen forest in 2023 by measuring soil respiration and environmental factors using a high time-resolution automated monitoring system. The results showed that the Typhoon Doksuri did not affect soil respiration in the control, but reduced it by 25.7% in warming treatment. Soil respiration in the warming treatment declined by 22.5% after Typhoon Doksuri's landfall. Furthermore, soil respiration in the warming treatment did not recover to pre-typhoon level after Doksuri's landfall. Typhoon Doksuri increased the temperature sensitivity of soil respiration in the warming treatment. The typhoon altered the daily dynamics of soil respiration, delayed the daily maximum by about 12 hours and advanced the minimum by about 9 hours in the warming treatment compared to the control. The typhoon affected both the magnitude and resilience of soil respiration in a subtropical forest under warming, altered its dynamics and temperature sensitivity. These findings were significant for understanding the impact of extreme climate events on forest soil respiration under global warming.