- Rainforests are ecoregions that typically receive between 180 to 210 centimeters of rainfall per annum. These forest types typically have canopies that attain heights of 30 to 45 meters. Rainforests may occur in tropical or temperate zones, but are customarily characterized by elevated levels of endemism and species richness. Sunlight penetration to the forest floor is a minimal quantity, generally less than two percent of the canopy value.
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