Coal mining in Semi-Arid Regions: Contrasting Effects on SOC Accumulation (Loess) vs. Loss (Desert)

This data reveal that mining substantially reshapes SOC storage and its regulation mechanisms: (i) loess soils exhibit deep SOC enrichment, whereas transition and sandy soils undergo significant depletion; (ii) coal mining was not the dominant driver of SOC vertical distribution in the transitional zone, but had non-negligible impacts on SOC of 0-100 cm disturbance, it overrides vegetation effects; and (iii) controlling factors shift with depth-from soil structural attributes at the surface to soil properties and topographic drivers in the subsoil.

本数据集表明，采矿活动显著重塑了土壤有机碳（Soil Organic Carbon，SOC）储量及其调控机制：（1）黄土土壤呈现深层SOC富集现象，而过渡性土壤与沙质土壤则出现显著的SOC损耗；（2）在过渡带内，煤炭开采并非SOC垂直分布的主导驱动因子，但对0-100 cm扰动土层的SOC具有不可忽视的影响，其效应盖过了植被的作用；（3）SOC的主控因子随深度发生变化：表层土壤的主控因子为土壤结构属性，深层土壤则为土壤属性与地形驱动因子。