Why is the littoral zone so productive? (3 reasons)?

Question

Why is the littoral zone so productive? (3 reasons)?

Answer 1

Here are a couple of web sites that might answer your question.

http://geology.com/nasa/nasa-universe-pi...

http://en.wikipedia.org/wiki/Littoral_zo...

Answer 2

the shallow waters have a vast array of vegetation. This provides protection, food source, and spawning areas for a large number of micro and macro organisms. Insects are among the most abundant of all species and the littoral zone of most all bodies of water are just teaming with these creatures.

The link below is a good place to get some other info.