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Trees are obviously a lot less mobile than, say, trogons—tropical birds common in Manú—or even ticks. But in a cloud forest, trees structure the ecosystem, much as corals structure a reef. Certain types of insects depend on certain types of trees, and certain sorts if birds depend on those insects, and so on up the food chain. The reverse is also true: animals are critical to the survival of the forest. They are the pollinators and seed dispersers, and the birds prevent the insects from taking over. At the very least . . . global warming will restructure ecological communities. Different groups if trees will respond differently to warming, and so contemporary associations will break down. New ones will form. In this planet-wide restructuring, some species will thrive. . . . Others will fall behind and eventually drop out.
