Microbial Diversity and Ecosystem Function in Soils

Soil is a living matrix in which vast microbial communities drive fundamental biogeochemical processes. The diversity of bacteria, archaea, fungi and protists underpins functions such as decomposition of organic matter, nutrient mineralisation, nitrogen cycling and carbon sequestration. Diverse assemblages confer resilience to disturbances, enabling soils to maintain productivity and stability under changing climatic and land-use regimes. Functional complementarity among taxa ensures that key processes continue when conditions shift; for example, different ammonifiers and nitrifiers operate across pH gradients and nutrient pulses. Soil microbial diversity also shapes plant health via rhizosphere interactions, influencing nutrient uptake, disease suppression and growth promotion. Globally, preserving and managing soil biodiversity is critical for sustaining ecosystem services, mitigating greenhouse gas fluxes and ensuring agricultural productivity in the face of intensification and land degradation.

Research from Nature Portfolio

Reciprocal transplant experiments have clarified how environmental constraints modulate microbial functioning: in oligotrophic mineral layers, community composition has limited impact on carbon turnover, whereas in the rhizosphere and litter layers, diversity and structure strongly influence respiration and decomposition rates. This work underscores the context dependency of microbial effects on soil carbon dynamics. Complementary studies on rhizosphere bacterial consortia reveal that increasing species richness and trait complementarity linearly enhances microbial respiration and plant biomass. These findings demonstrate that multispecies inoculations, rather than single-strain applications, deliver more robust ecosystem services in plant–microbe systems.

Research from all publishers

In agricultural microcosms, the stability of ammonia-oxidising communities under repeated nitrogen fertiliser disturbances depends on overall microbial diversity. High-diversity soils maintain more stable ammonia-oxidising bacteria (AOB) abundances and nitrification rates, whereas ammonia-oxidising archaea (AOA) decline irrespective of diversity, highlighting functional group-specific responses. Experimental loss of soil diversity via dilution-to-extinction disrupts nitrification, but rediversification with high-diversity inocula can fully restore nitrogen conversion rates. This work provides a blueprint for microbial rescue strategies to recover depleted soil functions. Metagenomic network analyses further identify specialised metabolic functions—particularly nitrogen metabolism and phosphonate cycling—embedded within keystone taxa. These functions sustain microbiome stability under pH perturbations, linking phylogenetic diversity to functional insurance and ecosystem resilience.

Microbial Diversity and Ecosystem Function in Soils publication trend

The graph below shows the total number of articles in microbial diversity and ecosystem function in soils across all publications each year (not limited to Nature Index journals).

Technical terms

Microbial community composition: The identity and relative abundances of microbial taxa present in a soil sample.

Nitrification: The two-step microbial oxidation of ammonium to nitrite and then nitrate, crucial for nitrogen availability.

Ammonia-oxidising bacteria (AOB) and archaea (AOA): Distinct groups of microorganisms that catalyse the first step of nitrification.

Rhizosphere: The narrow soil zone directly influenced by root exudates and associated microorganisms.

Keystone taxa: Species or groups whose specialised functions disproportionately support community stability and ecosystem processes.

Functional complementarity: The phenomenon where different taxa perform complementary roles, enhancing overall process efficiency.

References

1. Effects of habitat constraints on soil microbial community function. Scientific Reports (2017).
2. Complementarity among plant growth promoting traits in rhizospheric bacterial communities promotes plant growth. Scientific Reports (2015).
3. Stability of ammonia oxidizer communities upon nitrogen fertilizer pulse disturbances is dependent on diversity. Geoderma (2023).
4. Leveraging microbiome rediversification for the ecological rescue of soil function. Environmental Microbiome (2023).
5. Specialized metabolic functions of keystone taxa sustain soil microbiome stability. Microbiome (2021).
6. Consequences of microbial diversity in forest nitrogen cycling: diverse ammonifiers and specialized ammonia oxidizers. The ISME Journal: Multidisciplinary Journal of Microbial Ecology (2019).