The concept of an "ecological corridor" is a re-cent trend in conservationism. Studies in North America have found that as road systems have developed and cities have continually expanded, the natural environment has become ever more fragmented. Although there are national parks and other protected areas, they are isolated from one another like islands in the sea. This greatly reduces the value of the original conservation areas, especially for large roaming mammals like wolves, who find themselves constantly hemmed in. Hence the idea for linking separate protected zones together. In 1997 the International Union for the Conservation of Nature adopted a resolution that future planning should move from "island type" protected areas to "network type."
There are already several examples of ecological corridors in the world, such as the Ecological Corridor of the Americas, which is intended to run 40,000 kilometers from Alaska to Tierra del Fuego. The concept was originally bruited in 1967, and in 1990 the US, Mexico, and Central American countries joined in one after the other. If it can be successfully promoted, it may protect an impressive one-half of all species in the Americas.
In Taiwan, recently scholars and environmentalists have been promoting a "Central Mountain Range ecological corridor." They hope to link up the range's nature conservation areas, animal preserves, and major wildlife habitats with the Yushan, Taroko, and Shei-Pa national parks in a corridor that will connect 11 existing protected zones and stretch 300 kilometers from north to south.
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