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Transcript of Grasslands
some of the largest animals on earth
have to survive food shortages and droughts
fast runners and able to camouflage with their surroundings due to the lack of hiding places
graze for food
80 species of animals
300 species of birds
few animals can endure grassland conditions
examples: prairie dogs, cheetahs, bison, armadillos, coyotes, elephants, tigers, lions, crocodiles, and many more!
Here is an example of a grassland.
grow but also threaten the biome
plants have roots that will regrow after a wild fire
Locations of Grasslands
found on every continent except for the poles
Africa, Asia, Australia, South America, Europe, North America ( Midwest Rocky Mountains)
both coastal and inland, although more commonly inland
middle latitudes between 65˚N and 30˚S
wide range of latitudes because of the many types of grasslands
roughly 1/4 of the world's landmass
Today, many farmers use grasslands as grazing land for cattle. Grasslands may be vast, but that doesn't mean they are renewable.
GRASSLANDS AND SAVANNAS
By Ashley and Gigi
Cheetah chasing Zebras
Grassland climates have extreme hot and cold tempatures.
hot summers and cold winters
temperature ranges from -40˚ f (40˚c) to 110˚ f (43˚c)
large temperature range due to the many locations of the grassland biome
more precipitation in summer than winter
get about 25-87.5 cm (10-35 in) of precipitation
tropical or subtropical
receive 62.5-165.5 cm (25-65 in) of precipitation
little vegetation in the prairies
few trees except along small streams where there are cracks deep in the soil
plants arrive when its rainy, but get swept out during the dry season when there are fires
some flowers include milkweed, goldenrods, asters, and the blazingstar
not a lot of shrubs
poison ivy found at the edge of a prairie
not many trees
the 2 major trees are palms and acacias
few wild fruit trees
trees are spread throughout grasslands
never bunches of trees in 1 area
umbrella-like acacias are very typical in African savanna
provide food and shade for animals
birds and other animals eat off the wild fruit trees
Health Issues in the Grassland
common because animals kill other animals and the bodies are left to rot
no sewage drains underground
sewage runs by houses and contaminates the environment where people live
Here are some animals
Types of Trees
common tree is the white Acacia tree with big branches that animals use for shade
most of the trees in the grasslands are deciduous
the Candlebra, Gum, Acacia, Jarrah, Baobob, Manketii, and Jackalberry trees are also found in the prairies
the growing season begins when the temperature reaches 50˚f
plants that endure the arid climate of a grassland must be able to conserve water
trees do this with their knotty branches, thick bark, and considerable roots like the Baobob Tree
grasses and shrubs that survive are distinguished by having the ability reduce evaporation with layers of wax on their leaves or with vast root systems that trap large amounts of water
organisms that have the ability to do this are called xerophytic
As of today there are as few as 32,000 lions
in the African savanna.
Throughout the dry season temperatures fluctuate from scorching to freezing. During the wet season temperatures tend to consistently stay warm.
Animals in the savannas are constantly being threatened by hunting and poaching. Bison are nearly extinct.
Some wild grasses, plants, herbs, and bushes that grow include:
many non-woody plants
Here is a fun fact: Giant Eland the antelope lives in Africa. She is the largest antelope, weighing over 1,000 kg. She is 1.8 meters tall and can run over 70 kmph. She can easily jump over 1.5 meters in the air.
Kopjes are cliffs or stony hills found in a savanna.
Lakes and Ponds
large, deep bodies of water
surrounded by grassland
most ponds have floating vegetation
trees and shrubs often line the banks
due to lack of precipitation, ponds not very common
varies due to the large range of location
in temperate grasslands
it can snow
March-May is the rainy season
June-February is the dry season
live on a savanna in Kenya
protect their home from farmers and cattle
follow old traditions of Africa
has been here for hundreds of years
have always lived in the grassland and show no sign of moving
were once known as warriors
make their houses out of branches, twigs, grass and mud
women build the houses and get water
main food is milk
raise animals such as sheep and goats for meat
the grasslands meet the needs of the Maasai people so they continue to live there
had to build shelter to survive
had to adapt to environment
grasslands are not human's natural habitat
grasslands are not densely populated
Here is a fun fact: Big bluestrem grass is the tallest grass found on tall grass prairies. It can grow to be 11 feet tall! Another name for the big Bluestem is Turkeyfeet because of the shape of the seed heads.
Joe Pye Weed
Prairies (North America)
covered with tall grasses
trees would be found on hills or in more moist locations near springs or ponds
farmers have used prairies for centuries
animals are being driven out by hunters
prairies have grass that can grow as tall as 152cm; about 80cm of rain per year
prairies have grass that can grow 60-90 cm tall; average of 40-60 cm of rain per year
prairies have no taller than knee-high grasses; less than 15 cm of rain fall per year
very little moisture
plants store water
animal life is minimized to grazing and burrowing animals
threatened by over grazing
warm and dry climate
organisms can store water and become dormant for droughts
has lots of plant and animal life
rhinos and elephants are endangered due to hunting and poaching
wild fires are common
more fires where people live
Yellow Eyed Grass
Queen Ann's Lace
home to many endangered animals and rare plants that are important for the world to maintain
cover large amounts of earth
lots of non touched plants keep air clean and fresh
Grasslands cover vast amounts of land with rolling hills, scattered trees and bushes, and many grasses inhabiting some of the worlds largest animals.
Threats to the Biome
farmers with cattle
hunting and poaching
Why Few Trees?
animals graze on the few saplings growing
although many plants grow during the rainy season a good number of them are wiped out with fires that come during the dry season
need certain qualities to survive though conditions
1000 year old Baobob Tree
common in rainy season
water floods easily because of the topography
The sky always seems big in the grassland because there is little obstruction.
The soil is very rich in the grasslands.
as we know from the plant experiment soil is not the most important element for a plant to grow
water is the most important element
grasslands have good soil but not that much precipitation
therefor not many plants can survive
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