The butternut tree, a close relative of black walnut prized for its pale wood and wildlife value, is on the brink of disappearing from North American forests. A new study from Virginia Tech offers hope that the species could regain its foothold with help from modern data science. By mapping climate and soil conditions linked to natural disease resistance, researchers are guiding restoration strategies that could help this native species recover across the eastern United States.

Published recently in Forest Ecology and Management, the research identifies where endangered butternut trees and their more disease-resistant hybrids are most likely to thrive. Using habitat modeling that combines climate, soil, and genetic data, the team mapped regions across the Midwest and Northeast that are best suited for restoration.

[edit This is what makes this Solarpunk to me, using technology and advanced scientific GIS datasets to figure out where to focus on trying to bring back one of North America’s greatest trees.]

“Butternut has nearly vanished from our forests because of an invasive fungal disease that spread across the landscape a century ago,” said Carrie Fearer, assistant professor in the Department of Forest Resources and Environmental Conservation and senior author of the study. “But we now know that some individuals have natural resistance, and by understanding the conditions that support those trees, we can focus conservation where it will matter most.”

…

The models highlight parts of southern Indiana, western Kentucky, western Michigan, and much of New England as prime regions for resistant butternut. The results also identify areas where naturally occurring hybrids, crosses between native butternut and the disease-tolerant Japanese walnut, may already be helping the species persist.

“This study gives forest managers a conservation map,” said Fearer, also an affiliated faculty member of the Fralin Life Sciences Institute. “It tells us which combinations of temperature, precipitation, and soil carbon tend to support resistant butternuts. Those insights help us protect the right trees and guide future restoration planting.”

The findings have broader ecological implications, too. Butternuts are valuable “mast trees,” producers of large nuts that feed wildlife such as turkeys, deer, and bears. Their decline has ripple effects across forest ecosystems and the communities that depend on them.