ฃThe relative weight of nitrite and phosphate, both associated
with microbial decomposition in sediments and inorganic
absorption, establishes the biochemical component. Ammonium
concentrations may be affected by various biogeochemical and
biological processes, including uptake by phytoplankton, excretion
by zooplankton and bacterial remineralisation, since both of them
can be stimulated by high temperature conditions. The inverse
correlation between ammonium and temperature suggests that
increased ammonium is related to resuspension of sediments
caused by winds or the jet of springs flowing into the lagoon as
pulse events, especially during winter. High silicate concentrations
are related to freshwater inputs. In fact, the positive correlation of
ammonium, nitrite, oxidised nitrogen, phosphate, silicate and total
nitrogen in the second factor probably indicates the importance
of the freshwater inputs with their inorganic and organic load
(see Fig. 5).
ฃThe relative weight of nitrite and phosphate, both associatedwith microbial decomposition in sediments and inorganicabsorption, establishes the biochemical component. Ammoniumconcentrations may be affected by various biogeochemical andbiological processes, including uptake by phytoplankton, excretionby zooplankton and bacterial remineralisation, since both of themcan be stimulated by high temperature conditions. The inversecorrelation between ammonium and temperature suggests thatincreased ammonium is related to resuspension of sedimentscaused by winds or the jet of springs flowing into the lagoon aspulse events, especially during winter. High silicate concentrationsare related to freshwater inputs. In fact, the positive correlation ofammonium, nitrite, oxidised nitrogen, phosphate, silicate and totalnitrogen in the second factor probably indicates the importanceof the freshwater inputs with their inorganic and organic load(see Fig. 5).
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