Topic explanation

Standard explanation

Water, carbon, nitrogen and phosphorus cycle between organisms and physical reservoirs. Energy flows through ecosystems, but matter is reused.

Key points

• biogeochemical cycles
• cause → mechanism → outcome
• biogeochemical, cycles
• definition · mechanism · significance
• Biogeochemical cycles: Water, carbon, nitrogen and phosphorus cycle between organisms and physical reservoirs. Energy flows
• Mechanism: Start with the trigger or starting condition, follow the biological structures and signals in order,
• Biological significance: Understanding biogeochemical cycles connects structure, mechanism and biological outcome. It helps e
• WHAT — BIOGEOCHEMICAL CYCLES: Water, carbon, nitrogen and phosphorus cycle between organisms and physical reservoirs. Energy flows

Labelled diagram