1. Desert Masa Kanaan & Aisha Bint Feisal

2. Biome A collection of ecosystem sharing the similar climatic conditions; for example, tundra, tropical rainforest, desert.

3. Distribution

4. Climate in The Sahara desert The Sahara winds can reach hurricane level and often give rise to sand storms. Half of the Sahara receives less than an inch of rain per year, and the rest receives up to 4 inches (10 centimeters) per year. Extreme dryness is one of the Sahara's characteristics Daytime temperatures, especially in summer, are among the hottest in the world. Highs of more than 38°C. Because the air is so dry and has so few clouds, the temperature drops quickly after sunset. Differences of as much as 28°C.

5. Limiting Factors That Causes The Vegetation To Change Extreme heat Lack of water Vegetation must be able to adapt to unreliable precipitation and excessive heat

6. Vegetation Structure Grass Shrubs Oleander Date palm Thyme

7. NPP (Net Primary Productivity) Ecosystem type NPP (kilocalories /square meter/ year) Type of land% of earth’s land surface Desert< 200Barren ice, sand tundra desert 33%

9. Human Impacts hunting animals that are native to the Sahara Desert Overuse any oasis that they find Development of cities Oil drilling Irrigation Interference of natural ecosystems Pollution Agriculture

10. The Sahara Desert is being destroyed by development. So as population increases so does the demand for water. The streams, and ground water sources, once used by animals have been drained for industries, agriculture and people

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