16. Pollution

16 Pollution - Pollution as a Threatening Factor A subtle but universal form of habitat degradation What is Pollution Pollution is the introduction

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Pollution as a Threatening Factor A subtle, but universal form of habitat degradation
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What is Pollution? Pollution is the introduction of contaminants into a natural environment that causes instability, disorder, or harm to the ecosystem Pollution occurs in the air , water , and soil due to many factors including: Pesticides, fertilizers, heavy metals, fossil fuel burning, radioactive and chemical waste, prescription drugs, oils spill, litter, light, noise Pollution can be detected in virtually all ecosystems and affects both humans and wildlife
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Effects on Humans Water pollution causes 14,000 deaths per day , mostly due to contaminated drinking water in developing countries. Air pollution prematurely kills >600,000 people in China, >500,000 in India and >50,000 in the US per year Pollution in its various forms causes a range of illnesses as well as death in humans.
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Clearly, controlling benefits humans as well as native and endangered species.
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Pollution as an “Externality” Pollution affects the global “commons” Usually happens because the way our economy is organized allows polluters to treat pollution as an externality The cost of pollution is not born by the polluter but by someone else, while the polluter increases profits
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The Alarm Bell Dangers of pesticides to wildlife were brought to the world‟s attention in 1962 by Rachel Carson‟s book Silent Spring
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Pesticides Carson brought attention to chlorinated hydrocarbon pesticides such as DDT These chemicals are highly persistent and stored in lipids Spread from species to species through the food chain Subject to biomagnification that can result in threatening concentrations at the highest levels of the food chain
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Bioaccumulation
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Effects of DDT DDT and (other pesticides) contributed to the listing of several species „listed‟ under the US Endangered Species Act (Bald Eagle, Brown Pelicans, and Peregrine Falcons) DDT banned from most industrialized countries in the 1970s which allowed species to recover
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Peregrine Falcon Recovery
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Water Pollution - Oil Spills
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Water Pollution Plastics Massive amounts of plastics are being released into the ocean, threatening many
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This note was uploaded on 12/17/2011 for the course ZOO 360 taught by Professor Staff during the Fall '08 term at Wisconsin.

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16 Pollution - Pollution as a Threatening Factor A subtle but universal form of habitat degradation What is Pollution Pollution is the introduction

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