Maintaining Biodiversity (OCR A-Level Biology A): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
Human population: 1800 vs 2026
Human population: 1800 vs 2026
1 billion (1800) to over 8 billion (2026)
Main risk from habitat fragmentation
Main risk from habitat fragmentation
Inbreeding & local extinction from reduced genetic diversity
Atlantic cod stock decline by 1990s
Atlantic cod stock decline by 1990s
Over 95% of maximum historical biomass
Overexploitation definition
Overexploitation definition
Harvesting resources faster than natural regeneration
Monoculture definition
Monoculture definition
Growing single crop species over extensive areas
Eutrophication definition
Eutrophication definition
Water enrichment with nutrients (nitrate & phosphate)
UK specialist farmland bird decline (1970-2013)
UK specialist farmland bird decline (1970-2013)
Approximately 65%
Current ocean large animal % vs pre-exploitation
Current ocean large animal % vs pre-exploitation
Only 10% remain
Coral reef % of ocean biodiversity
Coral reef % of ocean biodiversity
Approximately 25%
Predicted year for coral reef disappearance
Predicted year for coral reef disappearance
2050