Zonation in the ocean powerpoint
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Transcript of Zonation in the ocean powerpoint
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Zonation in the Ocean
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The ocean can be divided into zones.
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neritic zone• shallow water over the continental
shelf• lots of light
oceanic zone• water over the deep sea• light only at the surface
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ocean light zones
photic zone
• sunlit, upper layers of ocean• made up of euphotic and disphotic zones
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ocean light zones
euphotic zone
• sunlit, upper layers of ocean• upper 150 m – depending on where you are• phytoplankton can survive and
photosynthesize here
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ocean light zones
disphotic zone
• twilight zone• enough light to see, but not enough for
photosynthesis• extends to a few hundred meters deep
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ocean light zones
aphotic zone
• permanently dark• no sunlight• no photosynthesis• most of ocean• extends to sea floor
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vertical zonation of the ocean depends on depth
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The Epipelagic Zone
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The Mesopelagic Zone
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The Bathypelagic Zone
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The Abyssopelagic Zone
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The Hadal or Hadopelagic Zone