Marine biomes

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Marine biomes

  1. 1. MARINE BIOMES<br />Marine biomes generally have salt concentrations that average 3%.<br />Marine algae and photosynthetic bacteria supply a substantial portion of the world’s oxygen and consume huge amounts of atmospheric carbon dioxide.<br />
  2. 2. OCEANS<br />Did you know that life on planet Earth began in the oceans more than 3 billion years ago?<br />Covers about 75% of the earth’s surface<br />The Four Main Oceans:<br />Pacific Ocean<br />Atlantic Ocean<br />Indian Ocean<br /> Arctic Ocean<br />The evaporation of water from the oceans provides most of the planet’s rainfall, and ocean temperatures have a major effect on world climate and wind patterns.<br />
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  4. 4. MARINE ZONATION<br />Like lakes, the marine environment is generally classified on the basis of:<br />LIGHT PENETRATION<br /><ul><li>Photic Zone
  5. 5. Aphotic Zone</li></ul>DISTANCE FROM THE SHORE AND WATER DEPTH <br /><ul><li>Intertidal Zone
  6. 6. Neritic Zone
  7. 7. Oceanic Zone</li></ul>OPEN<br /><ul><li> Pelagic Zone </li></ul>BOTTOM<br /><ul><li>Benthic Zone
  8. 8. Abyssal Zone</li></li></ul><li>Photic Zone<br />The zone where the light penetrates.<br />There is sufficient light for photosynthesis.<br />Aphotic Zone<br />Very little light can penetrate.<br />Light is insufficient for photosynthesis.<br />Intertidal Zone<br />Where land meets water<br />Alternately submerged and exposed twice daily die to tides<br />Can be rocky or sandy<br />Neritic Zone<br />Beyond intertidal<br />includes shallow regions over the continental shelves<br />
  9. 9. Ocean Pelagic Zone<br />Extends past continental shelves, can be very deep, is the open water<br />Includes most of the ocean’s water.<br />Benthic Zone<br />The substrate at the bottom of all aquatic biomes.<br />Made up of sand and organic and inorganic sediments (“ooze”).<br />Occupied by communities of organisms collectively called benthos.<br />A major source of food for the benthos is dead organic matter called detritus.<br />Abyssal Zone<br />The deepest regions of the ocean floor.<br />
  10. 10. CORAL REEFS<br />are widely distributed in warm shallow waters<br />dominated by structure of coral itself<br />formed by diverse group of cnidarians that secrete hard external skeletons made of calcium carbonate<br />cerates a substrate upon which other corals, sponges, algae grow<br />very diverse assortment of vertebrates and invertebrates<br />very productive<br />currents and waves constantly renew nutrients<br />light penetrates to ocean floor allowing photosynthesis<br />
  11. 11. ESTUARIES<br />Areas where freshwater merges with ocean<br />Freshwater meets salt water<br />Salinity varies<br />From that of fresh water to that of ocean water<br />One of most productive biomes on earth due to nutrients delivered by rivers<br />

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