Peak Soil Erosion Risk in Mixed Forests: A Critical Transition Phase Driven by Moso Bamboo Expansion

作者：Jie Wang, Xin Wang, Youjin Yan, Liangjie Wang, Haibo Hu, Bing Ma, Hongwei Zhou, Jia-Cai Liu, Fengling Gan, Yuchuan Fan · 发表于：Agriculture · 年份：2025 · DOI：10.3390/agriculture15161772 · 被引用次数：6 · 研究领域：Agriculture and Rural Development Research

Driven by climate change and human activities, the expansion of highly invasive moso bamboo (Phyllostachys edulis) into coniferous forests induces a serious ecological imbalance. Its rapidly spreading underground roots significantly alter soil structure, yet the mechanisms by which this expansion affects soil detachment capacity (Dc), a key soil erosion parameter, remain unclear. While bamboo expansion modifies soil physicochemical properties and root characteristics, influencing Dc and, consequently, soil erosion resistance, the underlying mechanisms, particularly stage-specific variations, are not thoroughly understood. In this study, we examined Japanese white pine (Pinus parviflora Siebold & Zucc.) forest (CF), moso bamboo–Japanese white pine mixed forest (MF), and moso bamboo forest (BF) as representative stages of bamboo expansion. By integrating laboratory-controlled measurements of soil physicochemical properties and root traits with field-based flume experiments, we comprehensively investigate the effects of moso bamboo expansion into CF on soil detachment capacity. The results of the study can be summarized as follows: (1) Expansion of moso bamboo significantly changed soil physicochemical properties and root characteristics. Soil bulk density was the highest in the MF (1.13 g·cm−3), followed by the CF (1.08 g·cm−3) and BF (1.03 g·cm−3); non-capillary porosity increased significantly with expansion (CF 0.03% to MF 0.10%); and although the stability of aggregates...