File:Forest Development in Bitterroot.jpg

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Deutsch: Drei Bilder desselben Gelbkiefernwaldes (Pinus ponderosa) im Bitterroot Nationalforst in Montana aus den Jahren 1909, 1948 und 1989. Die Zunahme der Vegetationsdichte ist auf die Bemühungen zu Brandschutz und Brandvermeidung seit 1895 zurückzuführen.
English: Forest development in a Ponderosa pine (Pinus ponderosa) stand in the Bitterroot National Forest in Montana. Photographs from 1909, 1948 and 1989, the increase in vegetation density was attributed to fire prevention efforts since 1895.

Forest development on the Bitterroot National Forest in Montana in a ponderosa pine stand after harvest (1909) in which fire was excluded since 1895. Note the changes in vertical arrangement and horizontal continuity in forest stand structure. In general many of today’s ponderosa pine forests contain higher densities of fire-intolerant species and suppressed trees than historical forests.

— U.S. Department of Agriculture Forest Service: Science Basis for Changing Forest Structure to Modify Wildfire Behavior and Severity. Editors: Russell T. Graham, Sarah McCaffrey, Theresa B. Jain, April 2004, p.4
Date Left to right: 1909, 1948, 1989
Source U.S. Department of Agriculture Forest Service: Science Basis for Changing Forest Structure to Modify Wildfire Behavior and Severity. Editors: Russell T. Graham, Sarah McCaffrey, Theresa B. Jain, April 2004, p.4
Author U.S. Department of Agriculture Forest Service; formatted by MrBell using Paint

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This image is a work of the Forest Service of the United States Department of Agriculture. As a work of the U.S. federal government, the image is in the public domain.

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