Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Ecosystems and Communities
Ecosystem  <ul><li>All the communities plus the physical factors in the environment in a given area, and how they relate t...
Topics <ul><li>Energy </li></ul><ul><li>Trophic levels </li></ul><ul><li>Food chains and webs </li></ul><ul><li>Chemical r...
Energy Light energy Photosynthesis Glucose Starch Respiration Released as ATP
ATP <ul><li>Provides energy for all living processes </li></ul><ul><ul><li>Mechanical (movement) </li></ul></ul><ul><ul><l...
Humans  <ul><li>Upset energy flow </li></ul><ul><ul><li>Block out light </li></ul></ul><ul><ul><li>Remove food source   </...
Trophic Levels
Energy Pyramids <ul><li>1% light used  for photosynthesis </li></ul><ul><ul><li>Light falling on a  leaf is   </li></ul></...
 
 
 
Food Chains and Webs
Human Affects <ul><li>Biological magnification </li></ul><ul><ul><li>Chemicals and poisons become more concentrated in bod...
<ul><li>Remove part of the food chain </li></ul><ul><ul><li>Cut down forests </li></ul></ul><ul><ul><ul><li>Remove produce...
<ul><li>Introduce exotic species </li></ul><ul><ul><li>Rabbits eat grassland </li></ul></ul><ul><ul><li>Stoats and weasels...
<ul><li>Removal of too much of an organism </li></ul><ul><ul><li>Overfishing - not enough older fish to reproduce </li></u...
Upcoming SlideShare
Loading in …5
×

5 Ecosystem

1,045 views

Published on

Published in: Education
  • Be the first to comment

  • Be the first to like this

5 Ecosystem

  1. 1. Ecosystems and Communities
  2. 2. Ecosystem <ul><li>All the communities plus the physical factors in the environment in a given area, and how they relate to each other </li></ul>
  3. 3. Topics <ul><li>Energy </li></ul><ul><li>Trophic levels </li></ul><ul><li>Food chains and webs </li></ul><ul><li>Chemical recycling </li></ul><ul><li>Management practices </li></ul>
  4. 4. Energy Light energy Photosynthesis Glucose Starch Respiration Released as ATP
  5. 5. ATP <ul><li>Provides energy for all living processes </li></ul><ul><ul><li>Mechanical (movement) </li></ul></ul><ul><ul><li>Chemical (new molecules or cells) </li></ul></ul><ul><ul><li>Active transport (absorb nutrients) </li></ul></ul><ul><ul><li>Electrical (for nerves) </li></ul></ul><ul><ul><li>Bioluminescence (e.g. glow worms) </li></ul></ul><ul><li>One way energy flow </li></ul>
  6. 6. Humans <ul><li>Upset energy flow </li></ul><ul><ul><li>Block out light </li></ul></ul><ul><ul><li>Remove food source </li></ul></ul>
  7. 7. Trophic Levels
  8. 8. Energy Pyramids <ul><li>1% light used for photosynthesis </li></ul><ul><ul><li>Light falling on a leaf is </li></ul></ul><ul><ul><ul><li>Transmitted </li></ul></ul></ul><ul><ul><ul><li>Reflected </li></ul></ul></ul><ul><ul><ul><li>Absorbed </li></ul></ul></ul>
  9. 12. Food Chains and Webs
  10. 13. Human Affects <ul><li>Biological magnification </li></ul><ul><ul><li>Chemicals and poisons become more concentrated in body tissues as you go higher up the pyramid </li></ul></ul><ul><ul><li>Top predators have the highest dose </li></ul></ul>
  11. 14. <ul><li>Remove part of the food chain </li></ul><ul><ul><li>Cut down forests </li></ul></ul><ul><ul><ul><li>Remove producer </li></ul></ul></ul><ul><ul><ul><li>Remove prey - predator suffers </li></ul></ul></ul><ul><ul><ul><li>Remove predators - prey population “booms” then “busts” </li></ul></ul></ul>
  12. 15. <ul><li>Introduce exotic species </li></ul><ul><ul><li>Rabbits eat grassland </li></ul></ul><ul><ul><li>Stoats and weasels introduced to eat rabbits - ate native birds instead </li></ul></ul><ul><ul><li>Deer (for sport) ate out beech forests </li></ul></ul><ul><ul><li>Possums eat out pohutakawa </li></ul></ul><ul><ul><li>German wasp competes with native birds (honey dew) </li></ul></ul>
  13. 16. <ul><li>Removal of too much of an organism </li></ul><ul><ul><li>Overfishing - not enough older fish to reproduce </li></ul></ul><ul><ul><li>Overfarming - don’t return nutrients to soil - create dust bowls covered in weeds </li></ul></ul>

×