Skip to content
Ecological Intelligence

Ecological evidence.
Independent perspective.
Explore Wild Lands ↗

Ecological Intelligence / Subject

Microbiome

Peer-reviewed

Two carbonate rock types did not support the same soil-microbial functional potential

Evidence
Peer-reviewed
Geography
Southwest China
System
Subtropical forest soils across contrasting lithologies

WHAT THE EVIDENCE SAYS

A Frontiers study used high-throughput quantitative PCR (HT-qPCR) to quantify carbon-, nitrogen-, phosphorus- and sulfur-cycling functional genes across limestone, dolostone and clastic-rock forest soils. Limestone soils showed significantly higher abundances across several functional-gene groups, and random-forest models explained 87–92% of variation in the measured functional-gene pools, informing the authors’ proposed nitrogen–microbial limitation–reactive minerals framework.

WHY IT MATTERS / OUR READ

Underlying geology can constrain biological function even under broadly similar forest cover. For soil assessment and restoration, lithology may be a useful prior variable when interpreting microbial indicators or transferring expectations from one site to another.

CAVEATS / UNCERTAINTY

Functional genes indicate metabolic potential, not realized nutrient flux. The lithology comparisons are observational and can carry correlated soil and site differences, and the proposed predictive framework still needs broader validation beyond the sampled forests.

SOURCE

Frontiers in Ecology and Evolution
View original evidence ↗

HT-qPCR functional-gene profiles from subtropical Chinese forests link limestone, dolostone and clastic substrates to different potential for carbon, nitrogen, phosphorus and sulfur cycling.

Read the Wild Lands assessment →
Peer-reviewed

Light-to-moderate grazing maintained higher plant diversity than heavy grazing in an Inner Mongolia desert-steppe experiment

Evidence
Peer-reviewed
Geography
Inner Mongolia, China
System
Desert steppe and managed rangeland

WHAT THE EVIDENCE SAYS

A long-term grazing experiment compared ungrazed, light, moderate and heavy grazing treatments in desert steppe. Plant species and functional-diversity responses were strongest under light to moderate grazing, while soil nutrients and microbial-community measures also changed with grazing intensity rather than following one uniform response.

WHY IT MATTERS / OUR READ

Grazing is better treated as an intensity and objective problem than a binary presence-or-absence treatment. The response variable matters: vegetation diversity, production, soils and microbial condition may not identify the same 'best' grazing level.

CAVEATS / UNCERTAINTY

The result comes from one long-term experimental platform in a specific desert-steppe climate and soil context. Diversity is not identical to forage production, soil condition or wildlife habitat, and rainfall variability can alter treatment responses across years.

SOURCE

Global Ecology and Conservation
View original evidence ↗

A long-running grazing platform suggests neither complete exclusion nor heavy grazing maximized plant community diversity, while soil and microbial responses shifted on their own trajectories.

Read the Wild Lands assessment →
Peer-reviewed

Plant diversity did not make every soil nitrifier more drought-resistant

Evidence
Peer-reviewed
Geography
Hanjiang River Basin, China
System
Riparian soils and nitrogen-cycling microbial guilds

WHAT THE EVIDENCE SAYS

A Journal of Ecology study combined a 41-site field survey with a controlled pot experiment and 914 soil samples to test drought resistance across ammonia-oxidizing archaea, ammonia-oxidizing bacteria and complete ammonia oxidizers. Drought reduced bacterial and comammox activity more strongly than archaeal activity. Increasing plant richness strengthened archaeal resistance but weakened bacterial resistance, while comammox responses were comparatively insensitive to richness.

WHY IT MATTERS / OUR READ

Biodiversity–stability relationships can reverse depending on the microbial process being measured. For soil management, 'more diverse vegetation stabilizes nitrogen cycling' is too coarse a prediction unless the functional guild and the relevant nitrogen pathway are specified.

CAVEATS / UNCERTAINTY

The study combines field gradients with a controlled experiment, but guild-level gene and activity responses do not directly quantify whole-ecosystem nitrogen loss or greenhouse-gas emissions. Results are system- and process-specific rather than a general rule for all soils.

SOURCE

Journal of Ecology
View original evidence ↗

Field and pot experiments in China found plant richness increased drought resistance of ammonia-oxidizing archaea, reduced it for bacteria and had little direct effect on complete ammonia oxidizers.

Read the Wild Lands assessment →
Peer-reviewed North America

For cover crops, ‘more species’ was not the best predictor of what happened next

Evidence
Peer-reviewed
Geography
Pullman, Washington, USA
System
Dryland wheat agroecosystem of the Palouse

WHAT THE EVIDENCE SAYS

A 2019–2022 field experiment compared single-species and functionally assembled cover-crop mixtures across 55 plots, followed by winter wheat. Soil and crop responses depended more on which functional groups were present than on species count alone: an oilseed–legume treatment produced the strongest multifunctionality and subsequent wheat response, while the six-species mixture did not emerge as the best-performing option.

WHY IT MATTERS / OUR READ

For managers, seed-mix richness is a weak stand-in for function. Choose species combinations against the rotation’s actual objectives—nitrogen, rooting, residue, weed suppression, soil biology and cash-crop performance—and monitor the following crop instead of assuming a more diverse mix is automatically more beneficial.

CAVEATS / UNCERTAINTY

The diversity gradient was unbalanced, with only one high-diversity mixture and one fallow control, so richness effects cannot be cleanly separated from composition. An exceptional 2021 drought caused cover-crop failure, the experiment was short, and results are specific to a dryland Palouse rotation rather than a universal cover-crop prescription.

SOURCE

Journal of Applied Ecology
View original evidence ↗

In a four-year Pullman experiment, functional composition—not mix richness—best explained soil and winter-wheat responses; one oilseed–legume combination outperformed the six-species mix.

Read the Wild Lands assessment →
Peer-reviewed

Coral probiotics may be changing more than the microbiome

Evidence
Peer-reviewed
Geography
Controlled coral experiment led at KAUST, Saudi Arabia
System
Pocillopora verrucosa coral holobiont under pathogen and heat stress

WHAT THE EVIDENCE SAYS

In Nature Communications, researchers inoculated Pocillopora verrucosa fragments with the pathogen Vibrio coralliilyticus, a putative probiotic Cobetia strain, both or neither, then exposed them to heat stress. Pathogen exposure produced distinct DNA-methylation changes; probiotic co-inoculation mitigated some of those changes, and those responses correlated with greater stress resilience and survival.

WHY IT MATTERS / OUR READ

If microbiome interventions can reproducibly alter host regulatory state, coral probiotics could eventually be more than short-lived microbial supplementation. That would widen the mechanism by which assisted resilience might operate—but this is exactly the kind of early mechanistic signal that needs replication before it becomes restoration practice.

CAVEATS / UNCERTAINTY

This was a controlled experiment on one coral species and specific bacterial strains. Epigenetic correlation does not establish durable transgenerational benefit, field effectiveness or ecological safety, and the authors note that many mechanistic questions remain unresolved.

SOURCE

Nature Communications
View original evidence ↗

A controlled experiment found that bacterial inoculation altered coral DNA methylation under heat stress, with a probiotic mitigating some pathogen-associated epigenetic changes and correlating with higher survival.

Read the Wild Lands assessment →

Keep exploring

Follow the systems. Find the connections.

WildlifeLandWaterOceansClimateCitiesOne HealthGovernanceMethods / Monitoring
Browse the archive →