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Lec26 - Conservation Thursday Review sessions Monday(12/12...

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Conservation Thursday 12/8/11 Biodiversity Crisis Threats to Biodiversity Species & Habitat conservation What YOU can do! Habitat / Ecosystem conservation Ex: Goose Pond Fish & Wildlife Area Species conservation: Ex: Bald Eagle Review sessions: Monday (12/12) 2:00- 4:00pm– JH 122 Final Exam: Tuesday (12/13) 10:15am- 12:15pm JH A106
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BIODIVERSITY: species richness & relative abundance # of species & relative population sizes biodiversity crisis 1.9billion species on earth ~2,000 Value of biodiversity: read pages 744-747
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Biodiversity is a crucial natural resource! economic value for humans direct -- indirect -- ethical & aesthetic values
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Ecosystem Services: purification of air and water reduction of the severity of droughts and floods generation and preservation of fertile soils detoxification and decomposition of wastes pollination of crops and natural vegetation dispersal of seeds nutrient cycling control of many agricultural pests by natural enemies protection of coastal shores from erosion protection from ultraviolet rays moderation of weather extremes provision of aesthetic beauty
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Madagascar’s has loss 90%of rain forest cover. loss of habitat reduction in available habitat Major Threats to Biodiversity: HUMAN INDUCED!
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