Figure 3

Principal component analysis (A) and graphic bars (B) based on the average concentrations (mg/L) of ammonium (NH₄-N), oxidised form of dissolved inorganic nitrogen (NOx-N) and phosphate (PO₄-P) in the control (C) and different treatments of Ruditapes decussatus (Rd) and Ruditapes philippinarum (Rp) since the beginning until the end of the experiment (D₀, D₂, D₅, D₈, D₁₂, D₁₆ and D₂₁).