FIGURE 1.

(A) Nitrate, nitrite and phosphate variability through the incubation and treatments. (B) Changes in nutrient concentration through time (μM h^-1) obtained by end point determination approach. The rates were estimated from the different incubation treatments, considering the differences between the hours at 2, 6, and 8 h (11:30, 15:30, and 17:30 h) compared with in situ nutrient concentrations as initial time (9:30 h). Treatments acronyms: FS (full sun treatment between 280 nm–700 nm), Dark (cover by aluminum foil and black plastic bags), PAR (400–700 nm, Photosynthetically Active Radiation), and PA (320–700 nm, UVR and PAR).