Introduction to Ecosystems
What is a SYSTEM? <ul><li>A  system  is a set of parts which link together to make the system work. </li></ul><ul><li>Ther...
What is an ECOSYSTEM? <ul><li>An  ecosystem  is a group of living things plus the non-living things they need. </li></ul><...
Examples of inputs/outputs/processes <ul><li>Inputs: </li></ul><ul><li>The inputs into an ecosystem may be water, CO 2  (c...
At what SCALE do ecosystems operate? <ul><li>There are many different ecosystems in the world. </li></ul><ul><li>Some are ...
STORES and FLOWS <ul><li>An ecosystem has a series of  stores  and  flows . </li></ul><ul><li>In the woodland ecosystem, e...
FOOD CHAINS <ul><li>Living things in the ecosystem are linked together by the flows of  energy and matter  as things eat e...
FOOD CHAINS This shows a food chain in the sea. Removing one animal from this would seriously harm the system.  HOW?
FOOD WEBS This shows a food web in a woodland area.  What would happen if the RABBITS were removed from the ecosystem?
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Ecosystem Introductory Presentation

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Introduction to GCSE ecosystems

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Ecosystem Introductory Presentation

  1. 1. Introduction to Ecosystems
  2. 2. What is a SYSTEM? <ul><li>A system is a set of parts which link together to make the system work. </li></ul><ul><li>There are inputs and outputs to the system. </li></ul><ul><li>A car's engine is an example of a system. An input to a car is petrol and an output is exhaust gases. </li></ul>
  3. 3. What is an ECOSYSTEM? <ul><li>An ecosystem is a group of living things plus the non-living things they need. </li></ul><ul><li>The parts of an ecosystem are linked together. </li></ul><ul><li>For example: in a woodland ecosystem, rain is an input which makes the trees grow. Evaporation is an output. </li></ul><ul><li>Copy the diagram and add examples to each box. </li></ul>
  4. 4. Examples of inputs/outputs/processes <ul><li>Inputs: </li></ul><ul><li>The inputs into an ecosystem may be water, CO 2 (carbon dioxide), O 2 (oxygen), matter, nutrients. </li></ul><ul><li>Processes: </li></ul><ul><li>Processes can be transpiration, growing, eating, absorption, respiration, photosynthesis, etc. </li></ul><ul><li>Outputs: </li></ul><ul><li>Outputs are waste or unwanted products such as O 2 (oxygen), water, dead matter, CO 2 (carbon dioxide). </li></ul>
  5. 5. At what SCALE do ecosystems operate? <ul><li>There are many different ecosystems in the world. </li></ul><ul><li>Some are small-scale , such as a pond. </li></ul><ul><li>Others are large-scale and cover vast areas, such as a rainforest. </li></ul>
  6. 6. STORES and FLOWS <ul><li>An ecosystem has a series of stores and flows . </li></ul><ul><li>In the woodland ecosystem, energy and matter is stored in the wood and the leaves. </li></ul><ul><li>There is a flow of nutrients from the soil to the leaves. </li></ul><ul><li>These are part of cycles such as the nutrient cycle and the water cycle. </li></ul>
  7. 7. FOOD CHAINS <ul><li>Living things in the ecosystem are linked together by the flows of energy and matter as things eat each other. </li></ul><ul><li>These links can be shown as food chains </li></ul>
  8. 8. FOOD CHAINS This shows a food chain in the sea. Removing one animal from this would seriously harm the system. HOW?
  9. 9. FOOD WEBS This shows a food web in a woodland area. What would happen if the RABBITS were removed from the ecosystem?

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