Human Human ImpactImpact

Invasive SpeciesInvasive Species

Non-Native Speciesenter an ecosystem

• Invasive Species, Alien Species, Non-Native Species are all the same.

• Globalization has allowed species to get into new ecosystems. Pets and Hitchhikers.

• Compete with native species and WIN!• Makes native species endangered or

extinct.

Acid RainAcid Rain

Deadly Acid Rain

• Chemicals like Sulfates and Nitrates enter the atmosphere from factory smoke and car exhaust.

• The pollution mixes with rain in clouds and lowers the pH of the water.

• The resulting acid rain burns trees, pollutes rivers and lakes killing fish and whole ecosystems.

Global WarmingGlobal Warming

Climate Change via

Green House Gasses Include

• Carbon Dioxide• Water Vapor• Methane

Climate Change = Global Warming

• Polar Ice melts, drowning coastal areas.• Average global temperature rises = HOT!• Ecosystems shift north.• Loss of Biodiversity.• Rain patterns shift = New deserts!

How do we stop it?

• Reduce combustion of fossil fuels.• Drive less cars.• No Coal, Oil, or Natural gas power plants.• Reduce your personal electricity

consumption.• Recycle manufactured materials.• Write your congressman, Protest!

Ozone Layer HoleOzone Layer Hole

CFC eat the Ozone Layer

• The ozone layer protects us from cancer causing UV rays.

• Chloro-floro-hydrocarbons are released from refrigerants (refrigerators, car ACs, home Acs, and arosol cans)

• Laws banning CFCs in the 1990s has helped to restore some of the ozone hole.

DeforestationDeforestation

Deforestation is poor land use.

• Cut trees down for lumber, agriculture, and human settlements.

• Destroys habitat for organisms, creates extinct species.

• Removes CO2 absorbing trees that stop global warming.

• No plants to hold soil = soil erosion.

Bioaccumulation Bioaccumulation or or

BiomagnificationBiomagnification

Poisons get into the environment

• Toxins - harmful chemicals that my get passed from one energy level to the next as they move up the food chain, DDT, lead, mercury

• Pesticide - a chemical used to kill agricultural pests, mainly insects

Causes• Bioaccumulation (Biomagnification) - increasing

concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web

Bioaccumulation (Biomagnification)

30

3030

30

30

30 30

30

30

30

30

30

3030

30

30

30

30

30

3030

30

30

30

30

30 3030

30

900 30

trophic level producers primary consumers

secondary consumers

tertiary consumers top carnivore

organism phytoplankton zooplankton small fish large fish raptor

total organisms caught 20

Total pollutants in caught by the organism

pollution average math

____ ÷ 20 = 2 ____ ÷ 5 = _______ ÷ ___ = ___ ___ ÷ ___ = ___ ___ ÷ ___ = ___

average amount of

pollution in the population

2