Plant-Soil Feedback Dynamics in Ecosystem Ecology
Summary
Plant-soil feedbacks arise from the bidirectional influence between vegetation and the soil environment, encompassing biotic and abiotic processes that shape community composition, productivity and ecosystem resilience. Through root exudation, litter deposition and microbial interactions, plants modify soil nutrient availability, moisture regimes and pathogen loads, thereby creating legacies that affect subsequent plant performance. Negative feedbacks often stem from the accumulation of specialist pathogens or depletion of essential nutrients under monocultures, leading to reduced growth and driving species turnover. Positive feedbacks emerge via mutualistic associations, notably with mycorrhizal fungi or plant growth-promoting bacteria, enhancing nutrient uptake and stress tolerance. Trait-based approaches have revealed how plant resource-acquisition strategies—embodied in root morphology, chemistry and phenology—predict the direction and strength of feedbacks. Temporal dynamics further modulate feedbacks, with fungal legacies persisting longer than bacterial communities and shifting under environmental change such as drought. Chemical legacies, embodied in soil metabolome alterations driven by root exudates, add a layer of complexity by influencing microbial consortia and nutrient cycling. Modelling frameworks integrating pathogen dilution, microbial assembly and metabolite-mediated interactions are refining our predictive capacity. Understanding these feedbacks is vital for sustainable agriculture, grassland restoration and forecasting ecosystem responses to global change.
Research from Nature Portfolio
Recent studies have demonstrated that dilution of specialist pathogens in diverse plant mixtures underpins productivity gains, confirming that pathogen accumulation in monocultures drives overyielding in field and greenhouse experiments. A combined empirical and theoretical model corroborates that diversity-mediated pathogen dilution is a key mechanism sustaining ecosystem function under changing environmental conditions. Investigations into microbial legacies reveal that soil fungal communities retain the imprint of previous plant occupancy for months, whereas bacterial communities turnover rapidly; however, both legacy types shape the endophytic microbiome of newly established plants, exerting lasting effects on early growth and resilience. Trait-based analyses among closely related species show that variation in specific root length and chemical root traits better predicts root microbiome composition than phylogeny, and that nematode herbivory correlates with negative feedback strength, underscoring the role of root-feeding organisms in mediating feedback outcomes.
Plant-Soil Feedback Dynamics in Ecosystem Ecology publication trend
The graph below shows the total number of articles in plant-soil feedback dynamics in ecosystem ecology across all publications each year (not limited to Nature Index journals).
Technical terms
Plant-soil feedback (PSF): Reciprocal influence between plants and soil properties affecting subsequent plant growth.
Soil legacy: Persistent changes in soil biotic or abiotic conditions following prior plant occupancy.
Pathogen dilution: Reduction of disease pressure in diverse communities due to non-host neighbours.
Overyielding: Enhanced combined productivity in mixtures compared with monocultures.
Rhizodeposits: Organic compounds released by roots that shape soil microbial and chemical profiles.
Soil metabolome: The complete set of small molecules in the soil, including root-derived exudates and microbial by-products.
References
- Dilution of specialist pathogens drives productivity benefits from diversity in plant mixtures. Nature Communications (2023).
- Plant–soil feedback under drought: does history shape the future?. Trends in Ecology & Evolution (2023).
- A trait‐based framework linking the soil metabolome to plant–soil feedbacks. New Phytologist (2023).
- Persistence of plant-mediated microbial soil legacy effects in soil and inside roots. Nature Communications (2021).
- Root traits and belowground herbivores relate to plant–soil feedback variation among congeners. Nature Communications (2019).
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