savannah

by: namita and emma

location

  • most of northern Australia is made up mostly of savannahs


  • savannahs cover up almost half of africa (more than 13 million square kilometers)

. the Serengeti (or Serengeti Plains) is the most well-known. The Serengeti is a vast, undulating plain that stretches 30,000 square kilometers. The Serengeti is home to one of the continents highest concentrations of large mammal species, including lions, hyenas, zebras, giraffes, and elephants


  • 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!

  • savannahs in africa savannahs cover up almost half of africa (more than 13 million square kilometers)

. the Serengeti (or Serengeti Plains) is the most well-known. The Serengeti is a vast, undulating plain that stretches 30,000 square kilometers. The Serengeti is home to one of the continents highest concentrations of large mammal species, including lions, hyenas, zebras, giraffes, and elephants

Big image

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.
Big image

Adaptations

  • Many animals in the savanna are herbivores because there is so much 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 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.

Variation

The animals all adapt to their environment over time by genes or by the physical traits in their bodies and they change over time to fit their need. For example the giraffes have long necks over time so they can reach their food and survive.

Description of interdependency between organisms

Example: one : the cheetah depends on the zebra for food and the zebra depends on insects that will need to eat other insects
two : the black mamba snake feeds and relies on rats and mice. rats feed on small animals and mice rely on wood and scraps.
Big image
Big image
Big image
Big image

how will the exotic species affect the environment?

if you add an exotic species such as a lemar to an already healthy and smoothly running ecosystem the producers that the lemur eats which are trees and shrubs will eventually run out because there's just enough for the animals who have always been eating it. and competition between the lemar, impala, rhino and the giraffe will come up because they all want the same producers. and also, the leopard and the vulture who eat the lemar will eat less of what they originally ate so those species will over populate. so if you add an exoctic species to a smoothly running ecosystem it will cause a lot of chaos.
Big image

how will the ecosystem be affected now that the native species is gone?

the ecosystem of the savannah would be greatly affected by the removal of the native rhinos. The plants the rhinos ate would over grow (over populate). and all the animals that ate the rhino such as the lion and the vulture would not have one of their food sources and would eventually starve and die off so all the animals they used to eat would overpopulate and then the whole entire ecosystem would become a mess and eventually all the organisms would die.