What are the main differences between paper birch and aspen trees in terms of their characteristics and ecological roles?

Paper birch trees and aspen trees have some key differences in their characteristics and ecological roles. Paper birch trees have white bark that peels in thin layers, while aspen trees have smooth, gray bark with black markings. Paper birch trees are typically found in cooler, wetter environments, while aspen trees thrive in a wider range of habitats. Ecologically, paper birch trees provide food and habitat for wildlife, while aspen trees are important for soil stabilization and nutrient cycling. Both trees play important roles in their respective ecosystems, but their differences in characteristics and ecological functions make them unique in their own right.