Unit 8 · Environmental Biology

A/L Biology

• Ecology: the environment and its factors
• Ecosystems: trophic levels, food webs and energy flow
• Ecological pyramids and productivity
• Biogeochemical cycles: carbon and water
• Biogeochemical cycles: nitrogen and phosphorus
• Population ecology
• Community interactions
• Ecological succession
• Biomes and the climatic zones of Sri Lanka
• Ecosystems of Sri Lanka
• Biodiversity: values, endemism and threats
• Conservation of biodiversity
• Pollution: air, water and soil, eutrophication and biomagnification
• Global environmental issues: climate change, ozone depletion and acid rain
• Waste management and sustainable development