Scholarlink

Aims <p>Revealing the driving mechanisms of forest soil multifunctionality is critical for devising climate-dependent strategies in forest resource management. Global warming has aggravated seasonal soil moisture droughts (a seasonal phenomenon marked by a temporary drop in soil moisture below levels needed for normal ecosystem functions); however, whether such droughts lead to changes in soil multifunctionality (SMF) in forest ecosystems is largely unknown.</p> Methods <p>Here, we examined forest soils in the dry–hot valley of northwestern Guangxi, where the climate is characterized by pronounced seasonal drought, to investigate the changes in soil properties and microbial communities during the dry and wet seasons and to analyze their relationships with SMF (e.g., water regulation, carbon storage, nutrient supply and material decomposition).</p> Results <p>We found that seasonal drought reduced soil material decomposition, increased soil water regulation, carbon storage and nutrient supply, and decreased the level of SMF index. Several soil functions and SMF index increased with increasing soil moisture, pH, nutrient availability, bacterial diversity, and network complexity. Seasonal soil moisture drought indirectly regulated SMF by influencing bacterial diversity and network complexity through soil pH and nutrient availability.</p> Conclusions <p>Overall, our results revealed that nitrogen availability and bacterial network complexity play a fundamental role in maintaining forest SMF in response to drought stress in dry–hot valleys. Therefore, not only soil nutrient availability but also bacterial diversity and their interactions should be considered when evaluating the responses of forest SMF, which has important implications for predicting changes in forest ecosystem functioning under future intensified drought scenarios.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Impact of seasonal drought on soil multifunctionality in dry–hot valley forests

  • 期刊论文

  • 发表日期：

    2025年8月14日

查看全文
  • Ping Zhong,
  • Shuoxing Wei,
  • Zhihui Wang,
  • Hanbiao Ou,
  • Yong Wang,
  • Hanjie He,
  • Weizhi Lu,
  • Xiaoyong Chen,
  • Shuguang Liu,
  • Songhai Li,
  • Guangjun Wang

摘要

Aims

Revealing the driving mechanisms of forest soil multifunctionality is critical for devising climate-dependent strategies in forest resource management. Global warming has aggravated seasonal soil moisture droughts (a seasonal phenomenon marked by a temporary drop in soil moisture below levels needed for normal ecosystem functions); however, whether such droughts lead to changes in soil multifunctionality (SMF) in forest ecosystems is largely unknown.

Methods

Here, we examined forest soils in the dry–hot valley of northwestern Guangxi, where the climate is characterized by pronounced seasonal drought, to investigate the changes in soil properties and microbial communities during the dry and wet seasons and to analyze their relationships with SMF (e.g., water regulation, carbon storage, nutrient supply and material decomposition).

Results

We found that seasonal drought reduced soil material decomposition, increased soil water regulation, carbon storage and nutrient supply, and decreased the level of SMF index. Several soil functions and SMF index increased with increasing soil moisture, pH, nutrient availability, bacterial diversity, and network complexity. Seasonal soil moisture drought indirectly regulated SMF by influencing bacterial diversity and network complexity through soil pH and nutrient availability.

Conclusions

Overall, our results revealed that nitrogen availability and bacterial network complexity play a fundamental role in maintaining forest SMF in response to drought stress in dry–hot valleys. Therefore, not only soil nutrient availability but also bacterial diversity and their interactions should be considered when evaluating the responses of forest SMF, which has important implications for predicting changes in forest ecosystem functioning under future intensified drought scenarios.