The Missing Piece in Rewilding: Why We Aren’t Talking About Soil Microbes

Walk into any rewilding project and you’ll hear the same hopeful language:

The forest is coming back.

Wildlife is returning.

Native plants are thriving.

Rewilding is often measured in what we can see — trees, birds, flowers, animals. But beneath the leaf litter and roots lies the most overlooked part of ecological recovery: the soil microbiome. And the truth is, most conservation projects don’t measure it at all.

This matters more than people realize.

Soil microbes are the hidden engineers of the natural world. They break down organic matter, drive nutrient cycling, form partnerships with plant roots, regulate carbon storage, and build soil structure. They are, quite literally, the living infrastructure of ecosystems.

A forest might look lush aboveground, but if the microbial community hasn't recovered, the ecosystem is still fragile — like a house rebuilt on a cracked foundation.

So why do we ignore something this important?

1. Microbial Testing Is Expensive and Out of Reach: To study microbes directly, you usually need DNA extraction, sequencing equipment, specialized labs, bioinformatics expertise, etc. These tools aren’t accessible to most conservation groups, which often operate with small budgets and volunteers. Even a single round of DNA sequencing can cost hundreds of dollars. So while microbes run ecosystems, they rarely make it into restoration budgets.

2. Aboveground Recovery Is Easier to See — and Sell: Funders, volunteers, and policymakers want visible progress: “We planted 2,000 native saplings;” “Bird populations increased by 40%;” “Invasive species removal was successful.” Soil microbes don’t show up in photos. They don’t attract donors. They’re easy to ignore because they live where we don’t look. As a result, microbial recovery becomes a scientific footnote instead of a restoration goal.

3. Microbial Ecology Is Complex and Hard to Translate: Even for scientists, soil microbiomes are difficult to summarize. They contain thousands of species per handful of soil. Many microbes can’t be cultured. Recovery timelines vary wildly. More diversity doesn’t always mean better function. For land managers, there’s no clear checklist that says:

“Your microbes are 80% restored — keep going.” Until there are simple tools and guidelines, soil microbes stay in the “too complicated” category.

4. Conservation Focuses on What Humans Can Directly Influence: Restoration ecologists can plant trees, remove invasives, install fencing, and adjust hydrology. But microbes? You can’t plant a Streptomyces seedling. You can’t weed out a pathogen with gloves and a trash bag. Microbial communities return indirectly through changes in habitat structure. So when conservation plans don’t explicitly include belowground recovery, it’s often because the pathway to influence feels unclear.

5. Out of Sight, Out of Mind: Soil is quiet, hidden, and doesn’t wave its branches in the wind. And for that reason, soil organisms — despite being responsible for most ecosystem processes — simply don’t capture public attention the way charismatic wildlife does. But ecosystems only function when the invisible world beneath them is restored.

BUT, the good news is that you don’t need a genetics lab to understand microbial recovery.

Decades of research show strong links between habitat complexity and microbial health:

deeper litter layers, more coarse woody debris, greater plant diversity, higher soil moisture, and reduced edge exposure. These metrics can be measured with nothing more than: a ruler, a quadrat frame, a smartphone canopy app, and a field notebook. By using these habitat features as proxies for microbial recovery, conservation groups could finally track belowground health without advanced equipment. The idea is powerful and liberating idea:

make microbial science accessible.

Why This Matters for the Future of Rewilding?

If we truly want restored ecosystems to function, then soil microbial recovery needs to become a standard part of monitoring plans.

Imagine:

*Land trusts tracking microbial resilience alongside tree growth

*Community groups measuring soil health without laboratories

*Restoration projects guided by both aboveground and belowground data

*Microbial recovery becoming part of every ecological success story

The Bottom Line: Soil microbes are the quiet heroes of ecological recovery. Ignoring them means ignoring the very processes that make forests resilient. As conservation tools evolve — including simple, field-based indices for microbial recovery — we have the chance to bring the underground world into the center of rewilding conversations.