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Tropical rainforests have been called the "jewels of the Earth" and the "world's largest pharmacy", because over one quarter of natural medicines have been discovered there. [2] Rainforests as well as endemic rainforest species are rapidly disappearing due to deforestation, the resulting habitat loss and pollution of the atmosphere. [3]
Kakamega Forest is a tropical rainforest situated in the Kakamega, Vihiga, and Nandi counties of Kenya, northwest of the capital Nairobi, and near the border with Uganda. It is Kenya 's only tropical rainforest and is said to be Kenya's last remnant of the ancient Guineo-Congolian rainforest that once spanned the continent.
An evergreen forest is a forest made up of evergreen trees. They occur across a wide range of climatic zones, and include trees such as conifers and holly in cold climates, eucalyptus, live oak, acacias, magnolia, and banksia in more temperate zones, and rainforest trees in tropical zones.
Amazon River rain forest in Peru. Tropical rainforests are hot and wet. Mean monthly temperatures exceed 18 °C (64 °F) during all months of the year. [4] Average annual rainfall is no less than 1,680 mm (66 in) and can exceed 10 m (390 in) although it typically lies between 1,750 mm (69 in) and 3,000 mm (120 in). [5]
In northern Idaho rainforest patches along the Clearwater River, a mean annual temperature of 5.4°C has been measured. [8] In British Columbian Inland rainforest areas, the mean annual temperature ranges from 2.7 to 4.5°C. In the coldest months, the mean temperature of these region lies between -8 and -9.5°C. [9]
The forest types on the islands include beach forest, mangroves, and lowland tropical rainforest. [4] The beach forests feature Barringtonia , Caesalpinia , and Terminalia . Characteristic species of the lowland rain forest include Anisoptera , Dipterocarpus , Hopea , and Shorea .