Communities, Abiotic and Biotic factors

• Population tells us the number of organisms of a species in a particular area.
• An ecosystem:

  The interaction between a community and the surrounding environment.
• A community:

  All the organisms living in an ecosytsem
• A population is the number of organisms of one species living in a particular area.
• Biodiversity measures how many different habitat species there are.
• More biodiversity means more food options. If one runs out, organisms can survive off another.
• Factors that affect communities can either be Biotic (living) or Abiotic (non living)
• Abiotic factors that affect communities: 1. Light intensity 2. Temperature 3. Precipitation 4. Wind speed 5. Soil pH 6. Moisture 7. Oxegyn levels
• Biotic factors that affect communities:

  • availability of other organisms for food.
  • the arrival of new predators close predator An animal that hunts, kills and eats other animals for food: in balanced ecosystems, predators and prey.
  • new diseases
  • one species outcompeting another