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How Do Human Activities Affect Sustainability?

How Do Human Activities Affect Sustainability?. Text 1.3: 36-40. Agenda. How Do Humans Affect Biodiversity? Habitat Change Habitat Fragmentation Overexploitation Pollution Acid Rain Invasive Species Climate Change Case Studies – Human Impact of Ontario Ecosystems

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How Do Human Activities Affect Sustainability?

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  1. How Do Human Activities Affect Sustainability? Text 1.3: 36-40

  2. Agenda • How Do Humans Affect Biodiversity? • Habitat Change • Habitat Fragmentation • Overexploitation • Pollution • Acid Rain • Invasive Species • Climate Change • Case Studies – Human Impact of Ontario Ecosystems • Inquiry – Help They Are Invading! • Consolidation – Exit Card

  3. Learning Goals • By the end of this class, we should be able to: • Analyze the impacts of the effects of human activity on populations, biodiversity and ecosystem sustainability

  4. How Do Humans Alter Habitats? • Habitat change • This is when humans alter a habitat so much that native species can no longer survive there • EX: to collect bottom-dwelling fish can destroy coral reefs

  5. How Do Humans Alter Habitats? • This also can to habitat fragmentation of habitations • The habitat is now a patchwork of different smaller habitats • Look at view of farmland which used to be deciduous forest in Canada!

  6. What is the Impact of Overuse? • Overexploitation: When we deplete or use a resource faster that it can be replaced • Common example is overfishing • EX: Cod overfishing in Atlantic Canada • Overuse of Water • EX: Drying up of the Aral Sea

  7. How Do Humans Affect Biodiversity? • Is any substance added to the environment that produces a condition that is harmful to organisms • Solid waste: Cannot be recycled, which is isolated from contaminated ecosystems in landfills

  8. How Do Humans Affect Biodiversity? • Air Pollution: One of the one of most concern is carbon dioxide gas which is key in climate change • Water pollution: Very easy to pollute. Can enter water from a specific or indirectly through rain or snow

  9. What is Acid Rain and Its Impacts? • Emissions from human activity can combine with water in the atmosphere to make acids which makes acid rain • Acid rain can … • Damage the waxy protective coating on leaves • Burns the skin of earthworms when in the soil • Can effect the way plants absorb nutrients

  10. What Are Invasive Species? • Increased by international travel and trade • An invasive species is a non-native species that causes harm to the ecosystem in which it has been introduced • Tend to outcompete the native species, have no competitor or can reproduce faster than native species

  11. Climate Change • There is a difference between Global warming and Climate Change • Global warming: The increase of the earth’s annual temperature • Climate change: significant long term change in expected climate patterns

  12. Climate Change • Climate Change and Global Warming can cause Range Shifts • EX: Dengue fever carrying mosquitoes have returned to Key West Florida in 2009 • This disease was absent of more than 75 years! • The return is blamed on warming-induced insect migration.

  13. Case Studies: Human Impact on Ontario Ecosystems • Form a group of 2-3. Pick one of the following topics: • A Freshwater Ecosystem p.g. 61 • A Suburban Terrestrial Ecosystem p.g. 62 • A Forest Ecosystem p.g. 62-63 • Create a placemat and individual research your topic. • As a group come to a consensus about what the impacts are on your Ontario Ecosystem.

  14. Inquiry – Help They Are Invading! • Research one Invasive Species in Ontario • Include the following components: • Picture of species • Description of species • How was your species introduced? • How can we remove your species?

  15. Consolidation • Exit Card – Reflect on the following statement and questions: • Ecosystems provide things that directly affect you. Do you take these things for granted? Give an example of how an ecosystem specifically helps you. Which value related to the preservation of biodiversity do you hold most important?

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