Marine pollution
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Marine Pollution. Objectives: Explain how marine debris enters the ocean ecosystem and the impact it has on the marine ecosystem Explain how oil enters the ocean and its impact on marine life. List possible oil clean-up methods. Discuss the concept of Gaia and global ecology.

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Marine Pollution

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Marine pollution

Marine Pollution

Objectives:

Explain how marine debris enters the ocean ecosystem and the impact it has on the marine ecosystem

Explain how oil enters the ocean and its impact on marine life.

List possible oil clean-up methods.

Discuss the concept of Gaia and global ecology.


Sources of human contamination

Sources of Human contamination

1. Agricultural

  • Fertilizers

  • Pesticides

  • Herbicides

  • Animal wastes from farms and ranches


Marine pollution

2. Domestic

  • Chemicals

  • Trash and other debris

  • Sewage


Marine pollution

3. Industrial

  • Chemicals from mines, refineries, and manufacturing plants

  • Heavy metals

  • Radioactive wastes


Marine pollution

4. Vehicles (automobiles and boats)

  • Fuel emissions

  • Oil spills

  • Trash

  • Sewage


Impact of chemicals in the ocean

Impact of Chemicals in the Ocean

1. biomagnification –higher concentrations of chemicals as you move up the food chain


Marine pollution

2. Eutrophication – excess nutrients enter the water, cause algal blooms which leads to oxygen depletion


Marine pollution

3. Debris harm/kill marine life.


Marine pollution

Oil

Source of millions of gallons of oil


Oil clean up methods

Oil clean-up methods

  • mechanical clean-up (mop up)- absorbing oil

  • fire

  • high pressure washing

  • bacterial break-down (bioremediation)


Gaia hypothesis

Gaia Hypothesis

  • idea that our planet functions as a single organism


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