AP Biology ch. 56 Global & Local Issues. Biological Diversity ~2 million species identified on Earth...
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Transcript of AP Biology ch. 56 Global & Local Issues. Biological Diversity ~2 million species identified on Earth...
![Page 1: AP Biology ch. 56 Global & Local Issues. Biological Diversity ~2 million species identified on Earth ~8 million species to find ~1 billion extinct species.](https://reader035.fdocuments.in/reader035/viewer/2022081603/56649f2f5503460f94c48fac/html5/thumbnails/1.jpg)
AP Biology ch. 56
Global & LocalIssues
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Biological Diversity
~2 million species identified on Earth~8 million species to find~1 billion extinct speciesEX: Mycena luxaeterna (eternal light
mushroom)
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Levels of Biodiversity
Genetic Diversity (humans ~1%)
Species Diversity (9,000 birds)
Ecosystem Diversity (US wetlands (marshes, fens, rivers…)
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Humans depend upon Nature
Ecosystem provides $33 trillion/year Purification of air and water Reduction of severity of natural disasters Generation of fertile soils Detoxification of waste Pollination of crops
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Big Problem: Biodiversity Crisis
Gene pools, species, and ecosystems are disappearing at a faster rate than at any time in the past 100 thousand years
Human population is causing 6th mass extinction
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Human Population History
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Humans are connected to Nature
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Ecological Problems
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1. Habitat Destruction
Occurs when humans destroy native habitats!Solution: restore and conserve natural areas
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2. Overharvesting
Occurs when wild organisms are harvested at a rate greater than the population can replenish
Solution: practice sustainability
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3. Invasive species
Occurs when species are moved by humans and thrive at the expense of other organisms
Solution: Plant native species
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4. Pollution
Occurs when contaminants enter the environment
Solution: EPA guidelines
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4b. Ozone Depletion
Occurs when chlorofluorocarbons break the chemical bonds of ozone
Solution: Global ban of CFC’s
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5. Global Climate Change
CO2 & global temperatures are increasingPolar ice caps are meltinghttp://www.youtube.com/watch?v=UaKqhRTqSlg
Sea levels are risinghttp://geology.com/sea-level-rise/
Solution: alternative energy
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5b. Ocean Acidification
Excess CO2 is dissolved into the Ocean lowering pH
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Overview of Human Impact
Humans use ecosystem services to liveThe human population rose exponentiallyHumans have altered natural biogeochemical
cyclesHumans must protect these biogeochemical
cycles upon which our survival is dependent