Where is equatorial region found
From the air, the tropical rain forest appears like a thick canopy of foliage, broken only where it is crossed by large rivers or cleared for cultivation.
The tallest trees attain a height of over feet Fig. Their slender trunks pierce skywards with wide-spread branches at the top. The smaller trees beneath form the next layer, and the ground is rooted with ferns and herbaceous plants which can tolerate shade.
Because the trees cut out most of the sunlight the undergrowth is not dense. Unlike the temperate forests, where only a few species occur in a particular area, the trees of the tropical rain forests are not found in pure stands of a single species. This has made commercial exploitation of tropical timber a most difficult task. Many of the tropical hardwoods do not float readily on water and this makes haulage an expensive matter. It is therefore not surprising that many tropical countries are net timber importers!
Many parts of the virgin tropical rain forests have been cleared either for lumbering or shifting cultivation. In the coastal areas and brackish swamps, mangrove forests thrive.
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