Grassland Biome Facts
|Grassland Biome Facts|
|Grasslands are also known as prairies, pampas, steppes, and savannas.|
|Grassland biomes are normally situated between a forest and a desert. In fact, grasslands surround every desert in Asia.|
|Twenty-five percent of the Earth is covered by the grassland biome.|
|There is a grassland biome on each continent with the exception of Antarctica.|
|Tropical and temperate are the two kinds of grasslands. Tropical grasslands experience warm weather all year long while temperate grasslands are warm part of the year and very cold during the other part.|
|Grasslands are perfect for cropping and pasturing because its soil runs deep and is extremely fertile.|
|Periodic fires, whether they are human induced or occur spontaneously, are very important to the grassland to ensure that invasive plants do not take over.|
|Tropical grassland biomes are located in the Southern Hemisphere while temperate grassland biomes are located in the Northern Hemisphere.|
|The grasses in the tropical grassland biome tend to be taller than that of the temperate because of the constant warm weather and additional rainfall it receives.|
|Since grassland biomes have rich soil, much of them are used for farming. There is only 2% of the original grassland left in North America.|
|There are two seasons in the temperate grassland: the growing season and the dormant season. Plants do not grow during the dormant season because the climate is too cold during that time.|
|Animals that you can expect to find in a grassland biome are zebras, lions, wolves, prairie dogs, and foxes. The animal diversity is dependent upon the location of the biome.|
|Large animals called bison previously ruled the grassland biome and roamed by the millions. During the 1800s, settlers begin to slaughter them for various reasons.|
|Since so much of the grassland biome has been utilized for farmland, the United States has made efforts to restore the grassland by planting grasses in areas previously used for farming.|
|The grasslands in the United States are known as prairies and are considered to be temperate grasslands.|
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LOCATION: Savannas are comprised mostly of grasses and a few scattered trees. They cover half the surface of Africa, large areas of Australia, South America, and India. That is a lot of the earth’s surface! Savannas can result from climate changes, soil conditions, animal behavior, or agricultural practices. Humans create savannas by burning grasslands and cutting down trees so they can plant crops. Large animals, like elephants, can turn a forest into a savanna by knocking trees down, stripping the bark from the trees, and tramping on tree seedlings.
WEATHER: An important factor in the savanna is climate. The climate is usually warm and temperatures range from 68° to 86°F (20 to 30°C). Savannas exist in areas where there is a 6 - 8 month wet summer season, and a 4 - 6 month dry winter season. The annual rainfall is from 10 - 30 inches (25 - 75 cm) per year. During the dry season, lightning often strikes the ground, igniting the dry grasses that cover the savanna.
PLANTS: The savanna is dominated by grasses such as Rhodes grass, red oats grass, star grass, lemon grass, and some shrubs. Most savanna grass is coarse and grows in patches with interspersed areas of bare ground. You won’t see many trees in the savanna because of little rainfall. Occasionally, you’ll find individual trees or small groves of trees. These mostly live near streams and ponds. The Acacia tree is an interesting plant in the savanna. It has an umbrella shape, with branches and leaves high off the ground that giraffes like to eat. Baobab trees also live in the savanna. They deal with dry conditions by storing water between the bark and meat of the tree.
ANIMALS: There are many different types of animals that live in the savanna. The species found in savannas vary by the geographic location of the biome. Animals native to African savannas include African elephants, zebras, horses, and giraffes. Many animals in the savanna are herbivores, which means they eat plants, and there is plenty of grass in the savanna. During the rainy months animals thrive in the savanna, but the rainy season is only half the year. During the dry season, surface water from the rain is quickly absorbed into the ground by thirsty soils. The competition for water during the dry season is so intense that most birds and many of the large mammals migrate elsewhere in search of water. Depending on the severity of the drought, the migration may be to a place nearby, or far away. The dry season is often associated with fires. Many insects with short life spans die in these fires, but the birds and larger animals are usually able to fly or run to safety. Although small burrowing animals probably can’t outrun the flames, they often survive the fire by digging deep into the ground and remaining there until the flames are gone. Some birds, such as the Fork-tailed Drongos, don’t flee the fires; they actually fly to the fires. For these birds fire means dinner. They eat the fleeing or flame-roasted insects.
PEOPLE AND THE SAVANNA: Some environmental concerns with savannas include poaching or hunting, overgrazing, and destruction of land for commercial crops. Many animals in the savanna, such as the rhinoceros and zebra, are endangered and threatened with extinction due to hunting, poaching, and habitat loss. The savanna is often damaged when it is used as pastureland for non-native domestic cattle. Cattle grazing also limits the amount of food available for wildlife.
Blue Planet Biomes: Savanna
Enchanted Learning: Savanna Animal Printouts
Smithsonian National Zoological Park: African Savanna for Kids