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biodiversity
the product of millions of years of evolution as organisms adapt to changing circumstances
three levels of biodiversity
genetic diversity
species diversity
ecosystem diversity
genetic diversity
sum of different forms of genes
species diversity
the variety of species & relative abundance
ecosystem diversity
the relationship between the range of habitats and various organisms that live in them
importance to humans
economic value - source of medicine, textiles, and industrial products
food source - sea food, crop production, decomposers
ecological life support - forests cleans air, water, control erosion
recreational - hiking, camping, relaxing in nature
keystone species
a species that has a large impact if present or absent in an ecosystem
eg: sea otters -