KS4 Biology Ecosystems

Ecosystems

Levels of organisation within an ecosystem

• Organism
• Population
• Biological Community
• Habitat
• Ecosystem
• Abiotic Environmental Factors
• Biotic Environmental Factors
• Feeding Relationships
  • Predator
  • Prey
  • Producers
  • Consumers
  • Parasites
  • Mutualists
  • Decomposers
  • Detrivores
• Competition
• Interdependence
• Survival of the Fittest

The principle of material cycling

• Water Cycle
• Carbon Cycle
• Nitrogen Cycle
• Decomposition
  • Decomposers

GCSE Biology Required Practical: Decay of Organic Material

Pyramids of biomass and transfer through trophic levels

Trophic Levels

• Food Chain
• Food Web
• Biomass
  • Pyramid of Biomass

Biodiversity

• Biodiversity
• Classification Key
• Sampling
  • Quadrat
  • Transect

GCSE Biology Required Practical: Measuring Population in a Habitat

Human Effect on Ecosystems

• Nature Reserves
• Protected Species
• Pollution
• Habitat Destruction
  • Deforestation
  • Global Warming

Some of the biological challenges of increasing food yields using fewer resources

• Food Production