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APES - The Living Environment Part 3
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UNIT 7 - The Living Environment - Part 3
Biodiversity
The sum total of all organisms in an area.
SPECIES
SPECIES DIVERSITY
A group of organisms with enough genetic similarities to breed with one another and produce fertile offspring
SPECIES RICHNESS
The number of different species in an area
SPECIES
RICHNESS
RELATIVE ABUNDANCE (SPECIES EVENNESS)
The extent to which the numbers of individuals of different species are equal or skewed
RELATIVE ABUNDANCE
BIODIVERSITY INDEX
GLOBAL SPECIES RICHNESS
Latitudinal gradient
species richness increases as you approach the equator
Latitude
Amphibian species richness
Varying and inconsistent environmental conditions favor generalists
Generalists
vs
Specialists
High solar energy, water availability and climate stability favor specialists
GENETIC DIVERSITY
The variation within the gene pool of a species/population
GENETIC
DIVERSITY
Wild
Species with greater genetic diversity typically provide more ecosystem services and are more resistant to environmental change
Wild
Domestic
Domestic
Species with lower genetic diversity typically provide fewer ecosystem services and are more vulnerable to environmental change