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Biology
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Forest fires bring about a renewal of the area. Thus, forest fires prevent climax communities from dominating an ecosystem forever. Why is this not desirable? 

Dec 5th, 2014

An old-growth forest (also termed primary forestvirgin forestprimeval forestlate seral forest, or in Britainancient woodland) is a forest that has attained great age without significant disturbance and thereby exhibits unique ecological features and might be classified as a climax community.[1] Old-growth features include diverse tree-related structures that provide diverse wildlife habitat that increases the bio-diversity of the forested ecosystem. The concept of diverse tree structure includes multi-layered canopies and canopy gaps, greatly varying tree heights and diameters, and diverse tree species and classes and sizes of woody debris.

Old-growth forests are economically valuable, and logging of these forests has been a point of contention between the logging industry and environmentalists.

Old-growth forests tend to have large trees and standing dead trees, multi-layered canopies with gaps that result from the deaths of individual trees, and coarse woody debris on the forest floor.[2]

Dec 6th, 2014

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