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Presentation transcript:

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

Pollution Air Pollution  Greatest source is _________________________ _________________________  Other sources: volcanoes and ______________________

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

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

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.

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 _______________________________ _______________________________

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.

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 __________________________________

Biomagnification Example includes a pesticide, DDT, which caused _____________________________________ and resulted in severe population declines for the Bald Eagles