Early Morning Beach Walk

by Deborah Benoit

Title

Early Morning Beach Walk

Artist

Deborah Benoit

Medium

Photograph - Original Photography By Deborah Benoit

Description

Taken in Port Orange, Florida near Sun Glow Pier.
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Oceanographers divide the ocean into different zones depending on the present physical and biological conditions. The pelagic zone includes all open ocean regions, and can be divided into further regions categorized by depth and light abundance. The photic zone covers the oceans from surface level to 200 metres down. This is the region where photosynthesis can occur and therefore is the most biodiverse. Since plants require photosynthesis, life found deeper than this must either rely on material sinking from above (see marine snow) or find another energy source; hydrothermal vents are the primary option in what is known as the aphotic zone (depths exceeding 200 m). The pelagic part of the photic zone is known as the epipelagic. The pelagic part of the aphotic zone can be further divided into regions that succeed each other vertically according to temperature. The mesopelagic is the uppermost region. Its lowermost boundary is at a thermocline of 12 �C (54 �F), which, in the tropics generally lies at 700�1,000 metres (2,300�3,300 ft). Next is the bathypelagic lying between 10 and 4 �C (50 and 39 �F), typically between 700�1,000 metres (2,300�3,300 ft) and 2,000�4,000 metres (6,600�13,000 ft) Lying along the top of the abyssal plain is the abyssopelagic, whose lower boundary lies at about 6,000 metres (20,000 ft). The last zone includes the deep trenches, and is known as the hadalpelagic. This lies between 6,000�11,000 metres (20,000�36,000 ft) and is the deepest oceanic zone.

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September 11th, 2013

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