An Arctic Road Trip Brings Vital Underground Networks into View

A race against the midnight sun

A white Chevy Suburban rolled down Alaska’s Dalton Highway with a steel corer, GPS and a small team of biologists chasing a vanishing window of fieldwork in the polar summer. The landscape looked barren at first glance — no trees, a sea of sedge and moss — but the real action was underfoot. It has been reported that Michael Van Nuland, the lead data scientist for the nonprofit Society for the Protection of Underground Networks (SPUN), led the sampling effort to map mycorrhizal fungi in northern Alaska’s permafrost soils.

Probing the hidden highways

The team hammered tubes into frozen ground, pulling soil cores that reveal sprawling fungal threads — hyphae — that knit plant roots together. These mycorrhizal networks shuttle nutrients like nitrogen and phosphorus to plants in exchange for carbon, forming a living scaffold beneath tundra ecosystems. Advanced imaging and robotics, it has been reported, are now showing these fungal systems aren’t mere plumbing; they can direct flows and restructure soil at landscape scales.

Rethinking who calls the shots

For more than a century fungi were cast as passive helpers or parasites. Recent work flips that script: fungi behave like merchants and managers, actively shaping plant communities and ecosystem dynamics. Who’s really running the show in the tundra — plants or fungi? The answer matters, and fast. As permafrost thaws and climates shift, those subterranean networks could redraw the map of Arctic life.

Why it matters beyond the soil

This is not nerdy natural history for its own sake. These networks underpin food for caribou, birds and large mammals, and influence carbon cycling in a region warming faster than most. Understanding them could change conservation priorities and climate models — and remind us that the most consequential ecosystems are sometimes the ones we walk right over. The Wood Wide Web, it seems, is more than a neat metaphor; it’s a key player in a warming world.

Sources: quantamagazine.org, Hacker News