Presentation on theme: "Aim What does the phraseHuman impact on Ecosystems mean?"— Presentation transcript:
Aim What does the phraseHuman impact on Ecosystems mean?
Explain what has happened to the polar bear in the picture below.
Ecosystem- all the living and non-living things that interact in a certain area of the environment
Environmental Impact All living things, including humans, affect the environment around them
Beaver Example Beavers build dams and affect the flow of water in the river
Termite Example Termite affect the environment by eating wood on trees
Human Impact As a result of technology we are making more significant changes to the environment. Give an example of how technology changes the environment? Where are i-phones made?
Stress on the Environment Human growth consumption depletes resources that the earth contains Industrialization
Pollutions affect on an Ecosystem Pollution decreases the stability of an ecosystem Pollution decreases biodiversity by harming species habitat
Depletion Depletion means a serious reduction in a short period of time
Finite Supply They cannot be replaced naturally We will eventually run out of supplies
What are some human activities that negatively affect the environment?
Deforestation Cutting trees down Destroys Habitats Causes Erosion Decreases Biodiversity
Why do we cut trees? For Industry (Jobs) Paper Housing Furniture
Fossil fuels Fuels that come from the ground Burning them produces energy to heat our homes, run our cars, and produce energy to run factories Examples- Oil, Gas and Coal
Burn Fossil Fuels Produces Carbon Dioxide (CO 2 ) (Greenhouse gas) Causes Global Warming Melts the Ice Caps
Natural Resources Renewable – Resources can be replaced quickly (Solar and wind power) Non-Renewable- Resources cannot be replaced quickly (Fossil Fuels-Oil, Coal, Gas)
Ozone Depletion Caused by Freon gas in refrigerators and air conditioners More UV (ultra-violet) rays reach the earths surface Causes mutations and skin cancer
Strip Mining Depletes Resources Causes Erosion
Overfishing Kills fish Depletes supply of fish for future generations
How does the government prevent pollution? Pass Laws to prevent it Impose a fine or penalty
Aim How and why do we need to preserve our natural resources?
How do we preserve resources? Reduce consumption Reuse resources Recycle
Reduce Carpooling Mass transit Conserve (walk or ride your bike)
Reuse Grocery Bags Water bottles Plastic plates
Recycle Plastic Paper Scrap metal Glass
Why do we need to conserve resources? Resources are finite (limited), so we will run out Prevents pollution
Define Pollution Pollution is the harmful change in the environment that will affect an organisms habitat (where it lives)
Types of Pollution Air pollution Water pollution Land pollution
Natural Recycling Water Cycle Carbon Cycle Nutrients
Water Cycle Ecosystems maintain a supply of water to survive
Carbon Cycle Animals take in oxygen and release carbon dioxide (Cellular Respiration) Plants take in carbon dioxide an release oxygen (Photosynthesis)
Nutrients Recycle Plants use nutrients in the soil to grow Nutrients are transferred through food chain Dead and waste of organisms are recycled and put back into the soil by decomposers (Bacteria and Fungi)
Aim How do people affect the way ecosystems function?
The Flow of Energy Energy is passed through the environment but NOT recycled Energy pyramid loses large amount of energy to heat Sun is constant source of energy
Population Growth The population levels off as it reaches an ecosystems carrying capacity
Direct Harvesting Destruction or removal of a species from a habitat which can lead to extinction An example is when an exotic animal is removed for a pet ( Cute monkey or parrot)
Invasive Species When people remove a species from one environment to another They become pest because they usually have no natural enemy and multiply quickly
Land Use As human populations grow we need more resources to make things we need (clothes, MP3 players and cars) Need more space for factories and homes
Deforestation Need to clear land to make homes and factories This leads to habitat destruction
Leads to Loss of Biodiversity Direct Harvesting Imported Species Deforestation
Aim What is the impact of technology and industrialization on the environment?
Industrialization The development of an economy in which machines produce our products
We Need Power Burn fossil fuels Nuclear fuels (splits atoms)
Power Plants Cause: Water pollution Air pollution
Water Pollution Sewage from a power plants can act as a fertilizer Plants bloom using up oxygen resulting in fish suffocating
Toxic Waste Poisonous waste dumped in rivers end up in the food chain Many organisms are killed as a result of these toxins
Air Pollution Burning fossil fuels leads to Increase in CO2 levels (Global Warming) Acid rain Smog
Aim How will the choices we make today affect our environment tomorrow?
Advances in Technology New factories Increase crop yield Efficient cars New Computers and iPods
Technology Creates Problems Mainly environmental There is a cost to everything For each new technology we must assess the risk
A trade-off We have to analyze the cost verse the benefit Is it worth it? (Pros and Cons)
Today's decisions affect our future The decisions we make today will affect our future environment
Decisions have Consequences The trade off was power produced verses a possible nuclear accident Was it worth it?
Aim Ecology Review
Ecology The study of how organisms interact with living and nonliving things that surround them
Terms to Know Biotic factors- Living things Abiotic factors- Nonliving things
Biotic vs Abiotic Biotic Animals Plants Bacteria Dead organisms Abiotic The Sun Water (Lake) Oxygen Temperature Nutrients
Ecosystem All living things and nonliving things interacting together
Habitat The specific environment an organisms lives in is called a habitat Examples- Frogs- Pond Birds- Trees Whales- Oceans
Niche The specific role an organism plays in an ecosystem (Sea Otter- What it eats and who eats it)
Population Members of a single species in a given area
Community All the different populations combined