Planting their orchards for millennia, the first Amazonians slowly transformed large swaths of the river basin into something more pleasing to human beings. In the country inhabited by the Ka’apor, on the mainland southeast of Marajó, centuries of tinkering have profoundly changed the forest community. In Ka’apor-managed forests, according to Balée’s plant inventories, almost half of the ecologically important species are those used by humans for food. In similar forests that have not recently been managed, the figure is only 20 percent. Balée cautiously estimated, in a widely cited article
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