Taxa richness and distribution of dominant species along the estuarine gradient.

(A) Total phytoplankton richness. (B) Relative abundances of dominant taxa (accounting for >10% of total phytoplankton in at least one sample) at the surface (top) and depth (down). A. glacialis  =  Asterionellopsis glacialis, B.brockmanni  =  Brockmanniella brockmannii and R.imbricata  =  Rhizosolenia imbricata. Blue dots indicate sampling points analyzed by both microscopy and clone library approaches (referred to as VIRE River, ESTUARY and BAY).