All data-GCB0726投稿数据.xlsx

This dataset supports a long-term experimental study examining the effects of canopy versus understory nitrogen (N) addition on soil animal communities across temperate and subtropical forest ecosystems. The study investigates how atmospheric nitrogen deposition, when mediated by forest canopies, fundamentally alters soil biodiversity and trophic dynamics.<br>The dataset includes comprehensive ecological measurements collected over a decade, encompassing:<br>Ant communities: Abundance, species richness, Shannon diversity, and community dominance indices.<br>Ant functional groups: Relative abundances of dominant and subordinate taxa, including functional classifications (e.g., generalists, specialists, predators).<br>Soil physicochemical properties: Parameters such as soil pH, total nitrogen, carbon content, and microbial biomass, indicative of soil microhabitat quality.<br>Other soil fauna: Abundance, taxonomic diversity, and order-level composition of soil invertebrates, including basal prey like Collembola and Acari.<br>Data were collected under six nitrogen addition treatments (0, 25, and 50 kg N ha⁻¹ yr⁻¹, applied either to the canopy (CAN) or understory (UAN)), allowing for direct comparison of canopy-mediated versus traditional enrichment approaches. The experimental design enables mechanistic insight into trophic cascades and biodiversity patterns across climatic gradients.<br>These data underpin the structural equation models and diversity analyses presented in the associated manuscript, revealing divergent ecological pathways by which nitrogen input restructures belowground communities. The dataset is valuable for meta-analyses, forest biodiversity modeling, and studies of global change ecology.