Editing Photic zone (section)

== Photosynthesis in photic zone ==
In the photic zone, the photosynthesis rate exceeds the respiration rate.  This is due to the abundant [[solar energy]] which is used as an energy source for photosynthesis by [[primary producers]] such as phytoplankton. These [[phytoplankton]] grow extremely quickly because of sunlight's heavy influence, enabling it to be produced at a fast rate. In fact, ninety five percent of photosynthesis in the ocean occurs in the photic zone. Therefore, if we go deeper, beyond the photic zone, such as into the [[compensation point]], there is little to no phytoplankton, because of insufficient sunlight.<ref>{{Cite book|title=Evolution of primary producers in the sea|date=2007|publisher=Elsevier Academic Press|others=Fa2000lkowski, Paul G., Knoll, Andrew H.|isbn=978-0-08-055051-0|location=Amsterdam|oclc=173661015}}</ref> The zone which extends from the base of the euphotic zone to the aphotic zone is sometimes called the dysphotic zone.<ref>[http://www.britannica.com/EBchecked/topic/457662/photic-zone Photic zone] ''Encyclopædia Britannica Online''. 14 August 2009.</ref>