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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
______________________
http://www.sciencephoto.com/image/164225/350wm/E1680117-Forest_fire-SPL.jpg
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
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
CO2) is increasing due to
humans causing
______________________________
Increase in CO2 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.
http://upload.wikimedia.org/wikipedia/commons/thumb/0/0b/P,p%27-dichlorodiphenyltrichloroethane.svg/200px-P,p%27-dichlorodiphenyltrichloroethane.svg.png
http://www.scienceclarified.com/images/uesc_04_img0177.jpg
http://tigertailfoods.com/wp/wp-content/uploads/2010/11/bald-eagle.jpg