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Deserts

Deserts. Jerica Rode and Tara Banfield. What is a desert?. Less than 50 cm/year Occupies 20% of the land surface of the Earth Four types Hot and dry Semiarid Coastal Cold. Where are they located?. Deserts. General Characteristics: Soil. Lithosols. Stone or mineral soil

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Deserts

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  1. Deserts Jerica Rode and Tara Banfield

  2. What is a desert? • Less than 50 cm/year • Occupies 20% of the land surface of the Earth • Four types • Hot and dry • Semiarid • Coastal • Cold

  3. Where are they located? Deserts

  4. General Characteristics: Soil Lithosols • Stone or mineral soil • Evaporated water leaves deposits of salt • Shrubbery and animals add nutrients

  5. General Characteristics: Plants • Plant hair helps to reduce evaporation • Produce small leaves in response to rainfall • Some remain as seeds and only germinate during wet periods • Ephemerals

  6. Hot and Dry Desert • Annual temperature: 20-25°C • Annual rainfall: 1.5 – 28 cm/year • Plants • Small, thick, and covered in cuticles • Open their stomata at night • Animals include species that are able to burrow

  7. Semiarid Desert • Summer Temperature: 21-27°C • Annual rainfall: 2 - 4 cm/year • Plants • Spiny for protection • Some are glossy to reflect radiation • Animals • Avoid direct sunlight

  8. Coastal Desert • Average temperature: 13-24°C • Average rainfall: 8-13 cm/year • Plants • Some plants form ridges/grooves to hold water • Thick fleshy leaves/stems to store water • Animals • Some are able to speed up their life cycle in ideal conditions

  9. Cold Desert • Long, cold winters and warmer summers • Annual temperature: -2 - 4°C • Annual precipitation: 15- 26cm • Plants are scattered • Animalsburrow

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