Invasive Plants Rapidly Reshape Soil Properties in a Grassland Ecosystem

Area of Science:

• Ecology
• Soil Science
• Microbiology

Background:

• Plant invasions often decrease native biodiversity and alter soil characteristics.
• Invaded soils can impede the restoration of native plant communities.
• Understanding invader impacts on soil is crucial for ecological restoration.

Purpose of the Study:

• To investigate how invasive plants alter soil physicochemical properties and microbial communities.
• To determine if invader-mediated soil shifts are reproducible and species-specific.
• To assess the long-term effects of plant invasions on soil environments.

Main Methods:

• Characterized plant, prokaryotic, and fungal communities alongside soil physicochemical properties.
• Utilized field sites, invasion gradients, and experimental plots for three invasive species.
• Analyzed soil microbial community structure, function, and 16S rRNA gene copy numbers.

Main Results:

• Each invasive species uniquely impacted soil physicochemical properties.
• Invasions shifted microbial taxa abundances but maintained overall community structure.
• Forb invaders showed enrichment in copiotrophic bacteria and higher metabolic potential.
• Older invasions exhibited stronger effects on soil abiotic properties.

Conclusions:

• Plant invasions have idiosyncratic but reproducible effects on soil environments over multiyear timescales.
• Invader-driven soil alterations can prevent or impair the reestablishment of native plant communities.
• There is no single strategy for how plant invaders alter grassland soil environments.