Long-term (1925–2015) forest structure reorganization in an actively managed temperate-boreal forest region of eastern North America

•Logging history (1925–2015) has reduced old forests to the profit of young stands.•Stand density has considerably increased (>72%) over the 20th century.•Above-ground biomass remains stable following these drastic changes.•Large diameter trees are now a smaller component of forest stand.•Ecological forestry could reduce the possible detrimental effects of forest management.