Ecology Part 7 Pollution

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Ecology Part 7 Pollution https://encrypted-tbn0.google.com/images?q=tbn:ANd9GcQnxqJkhff5jnciQJKPJMdz6NLOJ6wwS2F7Edc0pqviJKOwVP3U Ecology Part 7 Pollution http://room42.wikispaces.com/file/view/frozen-tundra_60.jpg/34424225/frozen-tundra_60.jpg https://encrypted-tbn1.google.com/images?q=tbn:ANd9GcQAEXerUrTGltkqpjeB5pVQ9tuumYcjA9TrfN1cncDzLFnZlclWyw https://encrypted-tbn2.google.com/images?q=tbn:ANd9GcQLzI9lItHn2rscnwSi1tpvaciTyItSxswsgHNL0zkB88TcUV8VbA

Environmental Change Environmental change can impact ecosystem stability. Such factors can include: Pollution Acid rain Ozone Layer Greenhouse effect Biomagnification

Pollution Air Pollution Other sources: volcanoes and forest fires Greatest source is burning of fossil fuels Other sources: volcanoes and forest fires http://www.sciencephoto.com/image/164225/350wm/E1680117-Forest_fire-SPL.jpg

Pollution Water Pollution Sewage discharged into rivers and streams Diseases: cholera, dysentery, hepatitis Fertilizer run-off is extra source of nutrients. Causes algal bloom and a decrease in available oxygen

Acid Rain Rain or snow that is more acidic than normal. Effects of acid precipitation: Washes away nutrients from soil Damages plant tissues Disrupts life cycles in water systems Destroys buildings and statues

Ozone O3 Ozone Depletion The ozone layer is thinning. Ozone layer is a protective layer of atmosphere that protects the Earth from UV radiation The ozone layer is thinning. Causes of ozone depletion: CFC’s (chlorofluorocarbons) These are man made coolants usedin refrigerants and air conditioners.

Greenhouse Effect Gases called greenhouse gases keep Earth insulated. Concentration of greenhouse gases (mainly CO2) is increasing due to humans causing temperatures to increase. Increase in CO2 is due to the burning of fossil fuels and deforestation

Biomagnification Concentration of a pollutant in the tissue of an organism increases as you move to higher trophic levels within a food chain Producers pick up pollutants from water that is not metabolized. They are concentrated and stored in their tissues. While energy decreases as it moves up the food chain, toxins increase in potency.

Biomagnification Biological Magnification Herbivores eat the producer and also concentrate and store the pollutant in their tissues. Carnivores eat the herbivores and store the pollutant in their tissues. At each step in the food chain the components become more concentrated.

Biomagnification Example includes a pesticide, DDT, which caused eggshell thinning and resulted in severe population declines for the Bald Eagles. http://tigertailfoods.com/wp/wp-content/uploads/2010/11/bald-eagle.jpg http://www.scienceclarified.com/images/uesc_04_img0177.jpg http://upload.wikimedia.org/wikipedia/commons/thumb/0/0b/P,p%27-dichlorodiphenyltrichloroethane.svg/200px-P,p%27-dichlorodiphenyltrichloroethane.svg.png