HOW DO HUMAN ACTIVITIES AFFECT SUSTAINABILITY?Text 1.3: 36-40

Agenda1. How Do Humans Affect Biodiversity?

Habitat Change Habitat Fragmentation Overexploitation Pollution Acid Rain Invasive Species Climate Change

2. Case Studies – Human Impact of Ontario Ecosystems

3. Inquiry – Help They Are Invading!4. Consolidation – Exit Card

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

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

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!

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

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

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

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

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

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

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.

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.

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?

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?