Probably Peter meant that when we are eaten a part of our DNA or other kind of information will eventually find it's way to the eater's reproductive system and transfer it to it's offspring, thus making them sort of our daughers and sons, at least that's what I understood after OJ menioned it as a "core".
I think you misunderstood some of the OP as I don't make a link with the original theory and "how did the first human spawn" thing. That's indeed evolution, but the op probably meant that after we die, every single part of us will eventually be recycled by nature into another form and thus in essence we are survived by the finished products after we were recycled. In these case and using Peter's theory logic, probably even if you merely become one with the soil you were buried in, you will provide minerals and other nutrients to plants that will grow in that place. Thus, being survived by them.







