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BIOME DESERT

BIOME DESERT. By : Juan José Romero María José Barrera Carlos Mario Angarita. Map. The desert biome. Deserts cover about one fifth of the Earth's surface and occur where rainfall is less than 50 cm per year . 1/5 = 20%. Types of deserts.

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BIOME DESERT

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  1. BIOME DESERT By: Juan José Romero María José Barrera Carlos Mario Angarita

  2. Map

  3. The desert biome Desertscoveraboutonefifth of theEarth'ssurfaceand occurwhererainfallislessthan 50 cm per year. 1/5 = 20%

  4. Types of deserts Desert biomes can be classified according to several characteristics. There are four major types of deserts: Coastal Hot and dry Cold Semiarid

  5. Hot and drydesert Most deserts, such as the Sahara of North Africa and the deserts of South Western United States, Mexico and Australia, occuring at low latitudes, they are hot and dry deserts. Theseasons are generallywarmthroughouttheyear and veryhot in thesummer. Thewintersusuallybringlittlerainfall. Theaveragerainfallrangesfrom 15 – 26 cm per year. Desertsurfacesreceive a little more thantwicethe solar radiation and lose almosttwice as muchheat at night. Annualtemperaturesrangefrom 20-25° C. The extreme maximumrangesfrom 43.5-49°C. Minimumtemperaturessometimesdropto -18° C.

  6. Semiariddesert Thesummers are moderatelylong and dry, and likehotdeserts, thewintersnormallybringlowconcentrations of rainfall. Summertemperaturesusuallyaveragebetween 21-27° C. Itnormallydoesnotgoabove 38° C and eveningtemperatures are cool, at around 10° C. As in thehotdesert, rainfallisoftenverylow and concentrated. Theaveragerainfallrangesfrom 2-4 cm annually. Montana and Great Basin along with the Nearctic realm make up the semiarid deserts.

  7. Coastaldesert Thecoolwinters of coastaldeserts are followedbymoderatelylong, warmsummers. Theaveragesummertemperaturerangesfrom 13-24° C; wintertemperatures are 5° C orbelow. Themaximumannualtemperatureisabout 35° C and theminimumisabout -4° C. Theaveragerainfallmeasures 8-13 cm in manyareas. Themaximumannualprecipitationover a longperiod of years has been 37 cm with a minimum of 5 cm. Coastal deserts generally are found on the western edges of continents near the Tropics of Cancer and Capricorn.

  8. Colddesert Thesedeserts are characterizedbycoldwinterswithsnowfall and highoverallrainfallthroughoutthewinter and occasionallyoverthesummer. The mean wintertemperatureisbetween -2 to 4° C and the mean summertemperatureisbetween 21-26° C. Thewintersreceive quite a bit of snow. The mean annualprecipitationrangesfrom 15-26 cm. Annualprecipitation has reached a maximum of 46 cm and a minimum of 9 cm. In someareas, rainfall can be heavy in autumn. Cold deserts are also known as polar deserts. Antarctica is the earth's largest cold desert, and the Arctic is the second largest.

  9. Animals in Desert • Armadillo Lizard • Banded Gila Monster • Bobcat • Cactus Wren • Coyote • Desert Bighorn Sheep • Desert Kangaroo Rat • Desert Tortoise • Javelina • Cactus Ferruginoug Pygmy Owl • Sonoran Desert Toad • Sonoran Pronghorn Antelope • Thorny Devil Armadillo Lizard Banded Gila Monster Coyote Desert Bighorn Sheep

  10. Plantsin desert • Barrel Cactus • Brittle Bush • Chainfruit Cholla • Creosote Bush • Crimson Hedgehog Cactus • Desert Ironwood • Joshua Tree • Jumping Cholla • Mojave Aster • Ocotillo • Palo Verde • Pancake Prickly Pear Cactus • Saguaro Cactus • Soaptree Yucca • Triangle-leaf Bursage

  11. LIFE IN DESERTS – HEALTH ISSUES A desert is a hostile, deadly environment for humans. In hot deserts, high temperatures cause rapid loss of water due to sweating , and the absence of water sources. Dehydration and death can appear within a few days. Humans have to adapt to sandstorms in some deserts, not just in their adverse effects on respiratory systems and eyes. Sandstorms can last for hours, even days. Surviving in the desert is difficult for humans. Despite this, some cultures have made hot deserts their home for thousands of years. Modern technology, including advanced irrigation systems, desalinization and air conditioning have made deserts much more hospitable. In cold deserts, hypothermia and frostbite are the chief hazards, as well as dehydration in the absence of a source of heat to melt ice for drinking. Starvation is also a hazard; in low temperatures the body requires much more food energy to maintain body heat and to move. Most traditional human life in deserts is nomadic in hot deserts on finding water. In cold deserts, it depends on finding good hunting and fishing grounds, and on storing enough food for winter. Permanent settlement in both kinds of deserts requires permanent water and food sources and adequate shelter, or the technology and energy sources to provide it. The danger represented by wild animals in deserts has been featured in explorers' accounts but does not cause higher rates of death, and generally does not by itself affect human life. Defense against polar bears may be advisable in some areas of the Arctic, as may precautions against venomous snakes and scorpions in choosing sites at which to camp in some hot deserts.

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