Here are some answers to the OP Posted by: Glenn_MacGrady on Dec-30-12 12:51 PM (EST)
http://scholar.google.com/scholar?q=distribution+of+microorganism+in+aquatic+environment&hl=en&as_sdt=0&as_vis=1&oi=scholart&sa=X&ei=tX7gUK_OE8jj0gHN4YD4BQ&ved=0CDMQgQMwAA