Be patient with me.  I'm excited about the following article.  As I was looking for information regarding salmon and their natural predators (I know I'm weird), I came across something interesting that really got me to thinking. (Danger!  Danger!) 

I would like to challenge you to read the article, remembering that it's an article put out by Cornell Lab of Ornithology (which is the study of birds).  As you read the article, pay specific attention, looking for the word "nutrients".  I don't know if you will agree, but I thought the article was a perfect example of how there is a naturally occuring system in place to provide nutrients to the food supply (reference, "greater fruit production").  I also thought it was amazing to see how the nutrients in the sea, the wild salmon, the natural waterways, the birds and the plantlife all worked together to get the nutrients where they could provide life giving chemistry in a natural setting.

I am no "greenie" but, I do believe that there is a relationship between all aspects of nature that is, in fact, a delicate, determined system that was put in place, in a naturally occuring manner, that was specifically designed to provide sustenance for the inhabitants of the Earth and I, personally (me, Elaine) believe that nothing can replace or out perform this one-of-a-kind system.  We, all of us, better wise up - FAST!

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http://www.allaboutbirds.org/NetCommunity/LbPrintPage.aspx?print=1659