Oak trees are a keystone species, - The Morton Arboretum

Oak trees are a keystone species, critical to the survival of entire ecosystems. As oaks decline, so can 500 species of birds, animals, and insects that

New Assessment Finds that Nearly One-Fourth of Oak Species in the US are of Conservation Concern – APGA

Oak Ecosystems Focus Area - Chicago Wilderness

keystone species Archives - Center for Plant Conservation

Oaktober: The Importance of Oak Trees - Nature's Perspective Landscaping

Global Conservation Consortium for Oak (GCCO)

Conservation of threatened oaks in Mesoamerica - Fondation Franklinia

West Hartford park with 63 tree species earns arboretum status

Morton Arboretum scientists are saving the world's trees - Curbed Chicago

Tree Advocacy Rebecca Latta Consulting

The Mighty Oak Natural Sustainable Living Chicago

OAKtober is Here - Friends of the Fox River

Oaktober: The Importance of Oak Trees - Nature's Perspective Landscaping

Illinois Issues: State's Oaks Squeezed Out By Other Species

The Morton Arboretum, United States Botanic Garden partner to protect threatened trees