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Chapter 9 - Pollution-e Over harvesting-Environmental...

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Chapter 9 (9-1) Local Extinction - Ecological Extinction - Biological Extinction - Endangered Species - Threatened Species - Biologists estimate than more than 99.9% of all species that have ever existed are extinct Current extinction rate is about 1% per year Why is this estimate low? - Why is it so difficult to estimate extinction rates? - Species-area Relationship - What happens to number of species when area declines? - Human impacts on extinction rates - Extinction rates are higher in some places, such as tropical rain forests Extinction due to human causes is faster than biodiversity can be replaced by speciation How should we apply the precautionary principle to extinction-prone species? - (9-2) Economic values and ecological services a) Instrumental value - b) Genetic information - c) Recreational value - ecotourism, Intrinsic Value - (9-3) HIPPO a) Habitat Loss - b) Invasive species - c) Population growth of humans - d)
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Unformatted text preview: Pollution-e) Over harvesting-Environmental indicators-Invasive, non native species-Over Harvesting-a) Wild game-b) Predator and pest control-c) Exotic pets and plants-Pollution- bioaccumulation, (9-4) CITES- Convention on International Trade in Endangered Species CBD- Convention on Biological Diversity ESA- Endangered Species Act a) Critical habitat-b) Habitat conservation plans-c) How many species are covered ?-Status of the ESA a) Some suggest the ESA is too restrictive b) Better implementation of the ESA (9-5) Wildlife refuges-Zoos, aquaria, botanical gardens-Gene Banks-(9-6) Create new habitats that foster both economic and conservation goals Most of the earth’s land and water is affected by humans, but there are often wild species in or near human dominated areas Example: Department of Defense Lands (Fort Huachuca, S. Arizona)...
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Chapter 9 - Pollution-e Over harvesting-Environmental...

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