Nutrient availability and invader density regulate the diversity–invasibility relationship mediated by soil microbes

This dataset accompanies a study examining how native plant diversity,
nutrient availability, and invader density interact to influence the
growth of the invasive plant Phytolacca americana via soil microbial
mechanisms in a temperate forest ecosystem. The dataset includes (1)
aboveground biomass data of P. americana grown in soils conditioned by
varying native plant diversity levels (1, 3, or 6 species), under
different nutrient conditions (fertilized vs. non-fertilized) and invader
planting densities (1, 2, or 4 individuals); and (2) soil fungal community
data derived from high-throughput sequencing, including taxonomic profiles
(from phylum to genus) and functional classifications assigned using
FUNGuild (e.g., saprotrophs, pathogens, symbionts). These data support
analyses of how plant–soil feedbacks and soil microbial composition
mediate invasion success, and are valuable for researchers in the fields
of invasion ecology, soil microbiology, and plant–microbe interactions.