Mains Paper II · 4 Environment & Ecology · 4.3 Biodiversity and species

4.3.1 Biodiversity: genetic, species and ecosystem levels; alpha, beta and gamma diversity

Biodiversity is the variety of life at three levels — genes, species and ecosystems — and ecologists measure it within a habitat (alpha), between habitats (beta) and across a region (gamma).

  • APPSC Group 2 · Mains Paper II
  • Advanced level
  • 9 min read
  • Full course

Key terms

  • biodiversity
  • genetic diversity
  • species diversity
  • ecosystem diversity
  • alpha diversity
  • beta diversity
  • gamma diversity
  • species-area relationship
  • latitudinal gradient
  • rivet popper

What this note covers

  1. Core factsFoundation
  2. ExplainedStandard
  3. DeeperAdvanced
  4. Mains writingMains writing
  5. Common trapsFoundation
  6. Quick revisionFoundation

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