Figure 4.

Variation in algal biomass as a function of (A) nitrogen, NH₄⁺ and NO₃^- + NO₂^-, (B) orthophosphate, PO₄^3- and ground water salt concentration per site. Error bars denote SE of means. (Chl-a: n = 108; NH₄⁺, NO₃^- + NO₂^-, PO₄^3- and salinity: n = 34–36)