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Ocean Acidification

The ongoing decrease in pH level of the oceans on Earth.

Melissa Kerhin

on 22 April 2010

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Transcript of Ocean Acidification

Ocean Acidification Why Do We Care? Impact on Future Generation What is it? How can we stop it? What causes it to occur? ocean acidification: the process whereby atmospheric carbon dioxide dissolves in seawater producing carbonic acid, which subsequently lowers pH of surrounding seawater (Glossary, 2010). CO2 + CO32- + H2O 2HCO3- Sources
fishing and tourism How does it Impact our Oceans?
Caused by the increasing amount of manmade CO2
Increase caused by fossil fuel burning, deforestation, cement production, and agriculture
Ocean absorbs about 1/3 of the carbon dioxide produced per year
Areas with pH of 7.6 have 30% less species
Sea grasses and algae like acidic waters
Species relying on don't
Ex: mollusks, crustaceans, echinoderms, corals, large calcareous algae, etc.
Some corals are more tolerant to high acidic levels because of symbiotic realtionship with certain algae
Reduce rate of coral building leaving it susceptible to bleaching, disease, and death
Plankton may decline if reef start dying off
The body tissues and fluids of large animals with gills will acidify and making it harder to carry oxygen

Background Information Chemical Equation The normal ocean pH is 8.2 calcium carbonate calcium carbonate Socioeconomic
Effects Biological Effects Commercial fishing
Tourism revenue
Fishery habitats
Protection against storm surges and hurricanes
Impact on Antarctica Loses a lot of calcium carbonate in winter
Loses even more from acidification
Causes decrease in marine petropod and other plankton which form the base of Antarctica's food web
Decline in fish penguins and whales There are http://www.vuvox.com/collage/detail/0246f58a28
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