台风“杜苏芮”对亚热带森林土壤呼吸的影响

doi:10.13287/j.1001-9332.202412.014

摘要/Abstract

摘要： 台风等极端气候事件通过干扰森林结构与树木生长影响森林生态系统土壤呼吸,全球变暖将提高台风强度及其发生频率,但有关台风对森林土壤呼吸的影响还知之甚少。本研究基于亚热带常绿阔叶天然林野外原位增温(电缆增温4 ℃)试验平台,利用土壤呼吸高频自动监测系统,探讨2023年台风“杜苏芮”发生期间亚热带森林土壤呼吸的动态变化及其对增温的响应。结果表明: 台风没有显著影响不增温对照的土壤呼吸,但使增温处理的土壤呼吸显著降低25.7%,其中,在台风登陆时增温处理的土壤呼吸比台风登陆前显著降低了22.5%,台风过后增温处理的土壤呼吸没有恢复到台风登陆前的水平,且台风还提高了增温处理的土壤呼吸温度敏感性。同时,台风还改变了土壤呼吸的日动态特征,增温处理的土壤呼吸日最高值比对照推迟约12 h,日最低值比对照提前约9 h。台风不仅影响了增温后亚热带森林土壤呼吸的强度与恢复力,还改变了土壤呼吸的动态变化特征和土壤呼吸温度敏感性。本研究结果对理解气候变暖背景下的极端气候事件对森林土壤呼吸的影响过程具有重要意义。

关键词: 台风, 土壤增温, 土壤呼吸, 高频自动监测, 亚热带森林

Abstract: 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.

Key words: typhoon, soil warming, soil respiration, high-frequency automated observation, subtropical forest

宋佳雨, 陈相标, 陈仕东, 熊德成, 杨智杰. 台风“杜苏芮”对亚热带森林土壤呼吸的影响[J]. 应用生态学报, 2024, 35(12): 3386-3392.

SONG Jiayu, CHEN Xiang-biao, CHEN Shidong, XIONG Decheng, YANG Zhijie. The effects of Typhoon Doksuri on soil respiration in a subtropical forest[J]. Chinese Journal of Applied Ecology, 2024, 35(12): 3386-3392.

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