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Presentation on theme: "https://encrypted-tbn1.google.com/images?q=tbn:ANd9GcQAEXerUrTGltkqpjeB5pVQ9tuumYcjA9TrfN1cncDzLFnZlclWyw https://encrypted-tbn2.google.com/images?q=tbn:ANd9GcQLzI9lItHn2rscnwSi1tpvaciTyItSxswsgHNL0zkB88TcUV8VbA."— Presentation transcript:

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

3 Environmental Change Environmental change can impact ecosystem stability. Such factors can include:  _____________________________  Acid rain  Ozone Layer  Greenhouse effect  _______________________________

4 Pollution Air Pollution  Greatest source is _________________________ _________________________  Other sources: volcanoes and ______________________ http://www.sciencephoto.com/image/164225/350wm/E1680117-Forest_fire-SPL.jpg

5 Pollution Water Pollution  Sewage discharged into rivers and streams  _________________________________, dysentery, hepatitis  ________________________________ is extra source of nutrients.  Causes algal bloom and a decrease in available ______________________

6 Acid Rain  Rain or snow that is more _______________________________________  Effects of acid precipitation:  Washes away nutrients from soil  _____________________________________  Disrupts life cycles in water systems  Destroys buildings and statues

7 Ozone O3O3  Ozone Depletion  Ozone layer is a ______________________________ of atmosphere that protects the Earth from ________________________________________________  The ozone layer is thinning.  Causes of ozone depletion: _______________________ (chlorofluorocarbons)  These are man made coolants usedin refrigerants and air conditioners.

8 Greenhouse Effect  Gases called ______________________________ keep Earth insulated.  Concentration of greenhouse gases (mainly CO 2 ) is increasing due to humans causing ______________________________  Increase in CO 2 is due to the _______________________________ _______________________________

9 Biomagnification  Concentration of a pollutant in the tissue of an organism ______________________________________________________ levels within a food chain  Producers ______________________________________ that is not metabolized.  They are concentrated and stored in their tissues.  While energy decreases as it moves up the food chain, _______________________________________in potency.

10 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 __________________________________

11 Biomagnification Example includes a pesticide, DDT, which caused _____________________________________ 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

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