Posted by kendra` on Tuesday, February 8, 2011 at 8:48pm.
With increase in depth, sunlight decreases and pressure increases. Not sure what you are seeking for the last part.
Since this is not my area of expertise, I searched Google under the key words "ocean zones producers" to get these possible sources:
http://www.google.com/search?client=safari&rls=en&q=ocean+zones+producer&ie=UTF-8&oe=UTF-8#hl=en&sugexp=ldymls&xhr=t&q=ocean+zones+producers&cp=21&pf=p&sclient=psy&client=safari&rls=en&source=hp&aq=f&aqi=&aql=&oq=ocean+zones+producers&pbx=1&fp=509d93197c8251b0
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
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