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Transcript of Desert Biome
Rainfall concentrated in short bursts
Evaporation exceeds rainfall. Sometimes, condensation of dew
from night cooling may equal or exceed rainfall. Rainfall Range Joshua Tree Seasons Tortoise Coyote Bobcat Devil Lizard Gila Monster Joshua Tree Barrel Cactus Day-100.4*F
Hot and Dry- winter, summer 68-77*F
Semi-arid- winter, summer 70-81*F
Coastal- winter 41*F or below, summer
Cold - winter 28-39*F, summer 70-80*F Scorching hot day and freezing cold in the night Soil / Decomposers In the summer it's hot
and dry In the winter rainfall happens although not a lot Human Threats Claret Cup Ironwood Desert Locations/Types *Hot and dry... Chihuahuan, Sonoran, Mojave, and Great Basin-NA; Southern Asian area , Neotropical, Ethiopian, and Australian
*Semi-arid..Utah, Montana, Great Basin-NA; Polar area
*Coastal... Polar area and Neotropical
*Cold... Antarctic, Greenland, and Polar areas Animal Adaptations Plant Adaptations Food Web Credits -Must be able to survive on very little food and
In Hot Deserts:
-Majority are nocturnal
-Many are burrowing and sleep below ground
-Animals use enclosed spaces to recycle the water
they release as they breathe
Stay in the shade or the shadows
In Cold Deserts:
-animals need thick fur and layers of fat -Must be able to collect and store water when present
-Must be able to reduce the water evaporating from them
-Leaves are hard, spiny or hairy
-Silvery or glossy leaves to reflect heat and sun
-Use dew for moisture and take in water through stems and leaves
-Short life cycle
-Grow far apart and roots extend out -Global Warming is increasing,humans are making too much carbon dioxide
-Nuclear wastes are being dumped there
- Oil and gas production
-Off road vehicles Spiny leaves Hairy leaves Hard leaves Rocky soil Gravely soil Shallow soil http://Environment.nationalgeographic.com
Prentice Hall Science Explorer, 2005 ed.
Deserts cover about 1/5 of the Earth's surface and have average rainfall less than 25cm per year.
Most occur at low latitudes.
Most animals are non-mammals, such as reptiles
Larger animals do exist but are less common than smaller animals Coastal deserts have long, warm summers and cool winters
Cold deserts have short, moderately warm summers and winters that are fairly long, cold and with snowfall Creosote tree The soil is course textured, shallow, rocky, and gravely
Contains abundunt nutrients, little or no organic matter
Can't absorb rain from flashfloods so flooding occurs
No sub-surface water
In the cold desert, the soil is heavy, silty, and salty Decomposers- Bacteria,Dung Beetles,Millipedes,Earthworms Sagebrush Ants Primary Consumers Producers Badgers Raptor Mountain Lion Antelope 2nd Level Consumers 3rd Level Consumers Kangaroo Mice Prickly Pear Cactus Snakes Desert Wildflowers Decomposers Soil Bacteria Coyote Gila Monster Bat