Ecological problems
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Ecological Problems PowerPoint PPT Presentation


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Ecological Problems. Biological Magnification. Increase or concentration of a substance, such as the pesticide DDT, in a food chain. OZONE DEPLETION. CFC’s are commonly used as: Refrigerants Styrofoams Solvents Aerosols. OZONE DEPLETION. Ozone protects the earth from harmful UVB rays.

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Ecological Problems

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Ecological Problems


Biological Magnification

Increase or concentration of a substance, such as the pesticide DDT, in a food chain.


OZONE DEPLETION

  • CFC’s are commonly used as:

  • Refrigerants

  • Styrofoams

  • Solvents

  • Aerosols


OZONE DEPLETION

  • Ozone protects the earth from harmful UVB rays.

  • It has been thinning over Antarctica.


OZONEO3

  • UV rays split

    Oxygen that add to O2 to make O3


Ozone = 03 CFC = CCl4

OZONE DEPLETION

Cl breaks off an oxygen from ozone


Why McDonalds changed to paper containers.


Should the School Use Styrofoam Lunch Trays?


Ozone Depletion Kills Krill (baleen whale food source)

Krill is a zooplankton


Reports show an 80% drop in the

Population of zooplanction off the

coast of southern California.

  • Krill are dramatically affected by UVB rays.


Glacier Melting

  • State of the Arctic on Vimeo


GLOBAL WARMING: SEA LEVELS RISE

  • Reuters AlertNet - VIDEO: Rising seas threaten the Maldives


DEFORESTATION

  • Loss of Forests

REPLANT


“Slash and Burn”


Erosion is More Likely with Deforestation


ACID RAIN


pH of Acid Rain

  • The pH of "normal" rain has traditionally been given a value of 5.6.

  • However scientists now believe that the pH of rain may vary from 5.6 to a low of 4.5 with the average value of 5.0.


EXTINCTION

  • End of a species


INVASIVE SPECIES

  • Non-native (or alien) to the ecosystem

Kudzu from Japan to stop erosion

Garden purple loosestrife is taking over wetlands


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