write the short note on tropical grasslands
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Tropical grasslands occur on either side of the equator and extend till the tropics. This vegetation grows in the areas of moderate to low amount of rainfall. The grass can grow very tall, about 3 to 4 meters in height. Savannah grasslands of Africa are of this type.
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Tropical grasslands, or savannas, are also the homes of primates in Africa and Asia; no savanna-living primates exist in South America. Tropical grasslands comprise a mixture of trees and grasses, the proportion of trees to grass varying directly with the rainfall. Areas of high seasonal rainfall support single-story woodlands of tall trees, while lush grasses form the ground vegetation; but, where rainfall is both seasonal and low, the trees consist of stubby xerophilous (dry-loving) shrubs and short, tussocky grasses. The principal primates of the savanna are the ground-living species: in Africa, the vervets, baboons, and patas monkey; and in Asia, the macaques and the Hanumān langur.
Tropical montane forests or tropical rainforests at high altitude also abound in primates in Africa, Asia, and South America. In equatorial Africa, certain primate species have colonized the montane-savanna regions, or moorlands, where the rugged mountainous terrain and seasonal food scarcity support herds of geladas and hamadryas baboons. These high mountaineers of Africa have no ecological counterparts in Asia or South America.
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