biodiversity and conservation 5.2- threats to biodiversity part 2 spi 4 predict how various types of...
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Biodiversity and Conservation5.2- Threats to Biodiversity part 2
SPI 4 Predict how various types of human activities affect the environment.
SPI 5 Make inferences about how a specific environmental change can affect the amount of biodiversity.
SPI 6 Predict how a specific environmental change may lead to the extinction of a particular species.
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Pollution:contamination of air, water, or soil by substances that are harmful to living organisms
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Pollution Statistics• More than 1 billion people worldwide don’t have
access to safe drinking water.• 5000 people die every day as a result of
drinking unclean water.• People who live in high-density air pollution
area, have 20% higher risk of dying from lung cancer.
• More than 3 million kids under the age of 5 years die every year due to environmental factors like pollution.
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Pollution Statistics• The United States produces 30% of the world’s
waste and uses 25 % of the world’s natural resources
• Every year around one trillion gallons of untreated sewage and industrial waste is dumped in the U.S water.
• Composting and recycling alone have prevented 85 million tons of waste to be dumped in 2010.
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2010 BP Oil Spill, Gulf of Mexico *206,000,000 gallons spilled
*<25% recovered
*Tens of thousands of fish, reptile, and mammal deaths
*Tens of billions economic damage
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Biological magnification
Non-lethal amounts of chemical pollutants can be passed up the food chain, becoming more concentrated at each stage until it reaches lethal levels even to large organisms.
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Eutrophication• Occurs when fertilizers,
and waste flow into waterways, causing extensive algae growth.
• Algae out-competes all other vegetation, causing massive plant die off
• Plant die off causes absence of oxygen in the water
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Invasive Species
• Non-native species that are either introduced intentionally or unintentionally.
• Outcompete native species for resources, often not recognized as predators by native animals
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