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West Cascade Range Crest, Oregon and Washington

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Composition: The Trees, Animals, and Other Life in the Old-Growth Forest


Wild rhododendron is part of the mosaic of young and old trees, shrubs, herbs, mosses, and fungi in an old-growth forest.Composition is defined as the different species of animals, plants, and other living organisms that are found in the ecosystem, and the abundance of each species.


The Pacific coast old-growth forest has thousands of species. The main tree species and just a few of the animal species are described on the Web page.



Old-growth hemlock. Each tree species contributes a little differently to an old-growth forest.


USDA Forest Service - Pacific Northwest Research Station
Last Modified: Monday, 16 December 2013 at 14:18:41 CST

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