Threats to Roadless Areas

In 2008, the International Union for Conservation of Nature and the Conservation Measures Partnership recognized a problem. Conservation scientists around the world were documenting threats to species and ecosystems — but using different words for the same things. One team called it "cattle." Another called it "livestock." A third called it "grazing." They were all describing the same threat, but their data couldn't talk to each other.

The solution was the same one Linnaeus applied to living organisms three centuries earlier: a shared, hierarchical classification system. If every team agreed to tag their cattle threat as "2.3 Terrestrial Animal Farming, Ranching & Herding," the data became comparable across continents, species groups, and decades.

Version 4.0 of this classification — published in 2025 by Salafsky and colleagues in Conservation Biology — is the current international standard. It is used by the IUCN Red List, by NatureServe, and by conservation agencies in dozens of countries. When a species in this database carries a threat code like 8.1 or 4.1, that code was assigned by professional ecologists at NatureServe using this same international standard — the same language used to assess the Snow Leopard in Central Asia or the Atlantic Sturgeon in the rivers of France.

The classification organizes threats into eleven broad categories, each divided into specific subcategories. Each entry carries an official definition — what the threat is — and an exposition — guidance on how to apply it and where it fits relative to adjacent categories. These are the authoritative descriptions. What follows uses them directly.

Stand at the edge of an Inventoried Roadless Area. What you're standing at the edge of is not simply a place without pavement. You're standing at the edge of a different ecological reality — one where the cascade of consequences that follows road construction has not yet begun.

A road is not one thing. It is many things simultaneously: a path for logging equipment and mining vehicles; a corridor along which invasive species travel on tire treads and boot soles; a source of sediment that enters streams whenever it rains; an ignition point for wildfire; a barrier that severs the movement of animals across the landscape; an enabler of grazing intensification and livestock infrastructure; a delivery mechanism for pathogens into previously isolated terrain; a structure that blocks fish passage at every stream it crosses; a signal to every opportunistic land use that the terrain is now accessible.

The ten threat themes documented in this application are not ten separate problems. They are ten faces of one decision — whether to build roads.

The Notice of Intent that initiated this rulemaking states its purpose plainly. The proposed rescission responds directly to Executive Order 14154, Unleashing American Energy, and Executive Order 14225, Immediate Expansion of American Timber Production — federal directives declaring that energy, mineral, and timber production must be facilitated "to the maximum possible extent" on public lands. The ecological consequences of that intent are not speculative. For the species and ecosystems documented here, they are already measured, already recorded, already expressed in the language of international conservation science.