On the periphery of these climatic regions, fire is important in maintaining grasslands by preventing the encroachment of forests in moist regions and desert shrubs in semiarid regions. Tropical grasslands develop in regions with marked wet and dry seasons. Temperate natural grasslands develop in regions characterized by an annual rainfall between 250 and 750 mm (10 and 30 in), a high rate of evaporation, and seasonal and annual droughts. Natural grasslands occupy, or once occupied, large areas of continental landmasses, including the prairies and plains of North America, the pampas and paramos of South America, the veld of South Africa, and the steppes of Eurasia.
Grasslands are natural, seminatural, and cultivated. Although temperate grasslands may have more than 50 species of vascular plants, and tropical grasslands more than 200, two or three species of grasses usually dominate upward of 60 percent of the biomass above ground. Grassland is defined as an ecosystem in which grasses, sedges, and other forage plants are the dominant vegetation. East Indian Lemon Grass ( Arabian Nights).Campbell Island Daisy ( Island Excursions).Other plants list Grassland as their biome but instead appear under the Zoo Decorations filter. Squirrel ( Zoo Tycoon 2, Grassland as of Marine Mania).Plain Tiger Butterfly ( Arabian Nights).Citrus Swallowtail Butterfly ( Arabian Nights).Shetland Pony ( Zoo Tycoon 2 Farm Animals booster pack)Īmbient Animals (four official + four user-made).Sheep ( Zoo Tycoon 2 Farm Animals booster pack).Przewalski's Wild Horse ( Endangered Species).Dwarf Sicilian Elephant ( Extinct Animals).Columbian Mammoth ( Extinct Animals booster pack).Clydesdale Horse (Colonel Swampert and Mjmannella download).Black-tailed Prairie Dog ( North America Pack).Aldabra Giant Tortoise ( Grassland Pack).4 Plants (six official + six user-made)Įxhibit Animals (eight official + 17 user-made).3 Trees (three official + eight user-made).2 Ambient Animals (four official + four user-made).1 Exhibit Animals (eight official + 17 user-made).
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