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Ecosystems Are Complex
 

Ecosystems Are Complex

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ecosystems ppt

ecosystems ppt

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Ecosystems Are Complex Ecosystems Are Complex Presentation Transcript

  • Ecosystems Complex structures containing mother nature’s gifts!
  • Ecosystems
    • An ecosystem is a natural unit consisting of all plants, animals and micro-organisms in an area interacting together with all of the non-living physical factors of the environment.
    • So how do living things interact with non living things?
  • Before we answer this question…
    • Lets look at examples of living and non living.
  • Living Things
  • Even these little guys are alive… Tiny planktons found in the ocean are a main food source for many fish and mammals. A protozoan found in the human body.
  • Living and non living things interacting… Living Things Non- Living things Plants Herbivores Carnivores Omnivores Detrivores Sunlight Water Soil Temperature Carbon Dioxide Oxygen Moisture
  • Putting it Together
    • The energy obtained at the first stage of any ecosystem cycle comes from the sun.
    • This is called the primary source of energy.
    • Energy from the sun is captured by plants in a process called photosynthesis.
    • Final product of photosynthesis is oxygen, water and simple sugars.
    • As a result of photosynthesis, smaller creatures like insects and other herbivores consume the plants.
    • Then carnivores eat these herbivores for their source of energy.
    • The remains of the herbivores and droppings left by any carnivores are consumed by detrivores (insects, beetles, etc.)
  •  
  • If only the cycle was this simple…
    • Unfortunately due to various human influences such as clearing of rainforests and the overuse of resources, some stages of the cycle either get too much energy or none at all.
    • Clearing of forests around the world have resulted in the extinction of many native plants and animals.
  • Types of human impact on the ecosystem.
    • Reduction - Loss in area or coverage of an ecosystem.
    • Fragmentation - Ecosystems reduced on size for purposes of housing and development.
    • Substitution - Replacing one set of organisms with another. For example, the introduction of cane toads in an effort to eradicate sugar beetles.
    • Simplification- Making an ecosystem less diverse.
    • Contamination - Introducing pollutants to an ecosystem.
    • Overgrowth- Creating too much nutrients causing an overproduction of an organism.
  • Ecosystems in Australia
    • Wetlands
    • Arid Inlands
    • Coral Reefs
    • Rainforests
    • Remnants
    • Islands
  • Ecosystems in Australia A marine habitat. A wetland habitat. A rainforest habitat. An arid desert habitat.
  • Riddle Me This!
    • I have gills, I have scales, I have fins, and one tail….
    • You may think I live underwater but alas to your horror I love walking not on water but on land!
    • What am I?
  • I am a Mudskipper! Unlike most fish, mudskippers spend most of their time out of the water! And they can live both in the water and on land. So how do they do it?
  • The End!