Ecosystems

Ecosystems

1. Niche

   • Specific role in the community
   • Two organisms cannot occupy the same niche

2. Succession

   • Seres
     • Stage in succession
   • Primary e.g. bare rock
     • 1st habitat produced from
   • Secondary
     • After event
     • After primary
   • Pioneer colonies
     • Needs little nutrients
       • Autotrophic
       • From atmosphere
     • Climax community
       • Stable or in equilibrium (dynamic)
     • Can survive in harsh environments

3. Habitats

4. Population

   • Same species

5. Community

   • Intracting different species

6. Pyramids

   • Biamass
   • Number
   • Energy
   • Productivity
     • GPP
       • Total amount of energy converted
     • NPP total
       • Respiration
     • Secondary productivity

7. Abiotic

   • Climate
   • Nutients
   • PH of soil
   • Temperature

8. Biotic

   • Symbiotic
   • Humans
   • Disease
   • Competition
   • Predator/prey
   • Invasive species

9. Food chains

   • Producer
     • Primary consumer
       • Secondary
         • Tertiary
   • Flow of energy
   • Food webs
   • Detrivores and decomposers