Biodiversity And Evolution Flashcards
Summary
Define Habitat Diversity
The number of different habitats in an area
Define species diversity
Number of different species and abundance of each species (species eveness) in an area
Define genetic diversity
Number of different alleles within a species population
Define species richness
Number of different species within an area
Define species eveness
Relative abundance of each species in an area
Factors affecting biodiversity
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Habitat loss Over exploitation (greater demand for reseources) Urbanisation Pollution Climate change
In situ protection methods
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Protected areas
Preventing introduction of threatening species
Promotion of particular species
Legal protection
Ex situ protection
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Relocating
Breeding in captivity
Botanic gardens
Seed banks
In situ 2 pros and 1 cons
Larger population conserved
Less disruptive
Difficult to control poaching and predators
Ex situ 2 pro 2 cons
Protect individual animals
Used to reintroduce species
Costly and hard to recreate habitat
Less successful
Only small number conserved
Rio convention on biological diversity (CBD)
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Teaches how to use plant and animal resources sustainably
Conservation of biodiversity everyone’s responsibility
CITES agreement
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Make it illegal to trade endangered species (limit through licensing)
Raise awareness through education
Countryside Stewardship Scheme (CSS)
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Regenerate hedgerows
Leave a grassy margin
Reduce grazing
Define phylogeny
Studying evolutionary history of groups of organisms
What can be used to classify an organism?
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Observable features
Embryological evidence
Fossil evidence
Molecular evidence
