"Meet the researchers restoring these unique wetlands high in Colorado’s San Juan Mountains."
"The resinous scent of Engelmann spruce wafted over a shallow, mossy pool surrounded by lush sedges near the 11,800-foot summit of Ophir Pass, in southwestern Colorado’s rugged San Juan Mountains. This type of wetland, known as a fen, forms when perennial water saturates the ground, limiting plant decomposition and allowing organic matter to accumulate as peat.
Just downhill, however, on that hot, sunny July day, another part of the fen was visible: a degraded area, bare soil exposed on a steep slope.
Peatlands — fens and bogs — are key climate regulators. (Bogs are maintained by precipitation, but fens, which, in North America, occur in the Northeast, Midwest and Mountain West, depend on groundwater.) Their peat retains plant carbon that would otherwise decompose and be released as carbon dioxide. Despite covering only about 4% of Earth’s land area, peatlands store a third of the world’s soil carbon — twice the amount trapped in forest biomass. “Fens are old-growth wetlands,” said Delia Malone, a recently retired field ecologist with the Colorado Natural Heritage Program. Some of Colorado’s fens are over 10,000 years old."
Anna Marija Helt reports for High Country News September 29, 2025.
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