Ecosystems

Ecosystems

1. What is an ecosystem

   • a ecosystem is a biological community of interacting organisms and their physical environment.

2. plants

   • photosynthesis
     • Plants produce their own nutrients
     • turn suns enegy water and carbon dioxide into glucose
     • plants are producers
     • plants are at the bottom of food chains

3. food webs

   • a system of interlocking and interdependent food chains.

4. food chains

   • A food chain shows how each living thing gets food, and how nutrients and energy are passed from creature to creature.

5. humans and ecosystems

   • posative impacts
     • jobs are created
     • money is made
     • quality of life improves
   • negative impacts
     • habitats are destroyed
     • native tribes have been forced to move
     • global warming is speeded up
     • soil quality reduced
     • increased flooding

6. main types of ecosystem

   • Tropical rainforests
     • The tropical rainforest is a hot, moist biome found near Earth's equator.
   • hot deasert
     • A desert is a barren area of land where little precipitation occurs and consequently living conditions are hostile for plant and animal life.
   • Tundra
     • tundra is a type of biome where the tree growth is hindered by low temperatures and short growing seasons.
   • plains
     • a plain is a flat, sweeping landmass that generally does not change much in elevation.