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Biodiversity and its Conservation
Biology · Chapter 18 · Unit 5: Ecology and Environment
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Your path through this chapter
Visual lesson Beta
- Part 1: Biodiversity and its patterns16 slides
- Part 2: Loss and conservation of biodiversity15 slides
Flashcards Beta
30 cards for quick recall of key terms and facts.
Review the cards Step 3: Not startedPractice
66 board-style questions with instant checks: Multiple choice 33, Short answer 15, Numerical 6, Assertion and reason 4.
Practise Step 4: Not startedChapter test Free
Short and long chapter tests in board pattern, with results and analysis.
Step 5: Not started- Chapter test (long) — Biodiversity and its Conservation · 40 marks · 100 min
- Chapter test (short) — Biodiversity and its Conservation · 20 marks · 50 min
Topics 6
- Biodiversity: genetic, species and ecosystem diversity; global biodiversity and proportions of major taxa
- Patterns: latitudinal gradients, species-area relationship (graph and equation); rivet popper hypothesis; importance of biodiversity (narrowly utilitarian, broadly utilitarian, ethical)
- Loss of biodiversity: recent extinctions (dodo, quagga, Steller's sea cow, thylacine, three tiger subspecies); causes - habitat loss, over-exploitation, alien species, coextinction
- In-situ conservation: biosphere reserves, national parks, sanctuaries, sacred groves; hotspots, Ramsar sites, Red Data Book
- Ex-situ conservation: captive breeding, zoos, botanical gardens, wildlife safaris, seed banks, cryopreservation, tissue culture
- International conventions: the Earth Summit and the World Summit (place, year, agenda)