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Why are recovering eastern deciduous forests not identical to forests that existed before 1650?
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ecological restoration
Wetland restoration along the Târnava Mică (Tîrnava Mică) River in Romania. A former gravel mine (left) was transformed into a functional wetland (right).
Recovering eastern deciduous forests are not identical to those that existed before 1650 primarily because they lack the complex characteristics of old-growth forests. While forest cover in eastern North America has increased since the 1870s, most of these trees are relatively young, and few areas retain stands of uncut, mature timber.1
The differences stem from several key factors:
- Structural Complexity: Unlike the complex, multi-layered canopy and diverse age structure of old-growth forests, recovering forests are often dominated by younger trees. They lack the abundance of large, old trees, standing deadwood, and woody debris on the forest floor that provide essential habitats for diverse species.12
- Disturbance History: Most of the region was cleared for agriculture or timber following European settlement. This history of intensive land use has fundamentally altered the soil and vegetation, making it difficult to discern the original natural condition.314
- Faunal Changes: The animal populations of these regions have been so drastically altered that it is nearly impossible to determine what the original animal geography would look like if humans were removed.5
- Invasive Species: Modern forests are more susceptible to invasive species, which are less common in undisturbed, primary forests.2