HchR Temperature (°C) Salinity DIN (μmol l-1) SRP (μmol l-1) SRSi (μmol l-1) Chl-a (mg m-3) 1 27.0 (25.5-31.5) 32.0 (26.5-32.5) 1.48 (1.38-2.95) 1.00 (0.60-1.40) 22.5 (13.5-29.5) 0.40 (0.23-0.65) 2 26.7 (25.0-30.0) 25.5 (18.5-34.0) 1.11 (0.65-3.03) 1.05 (0.45-1.40) 23.5 (16.5-29.5) 0.46 (0.26-0.75) 3 28.2 (26.0-30.5) 27.5 (15.0-36.0) 1.06 (0.91-3.50) 0.95 (0.45-1.75) 24.0 (12.0-29.0) 0.39 (0.27-0.74) 4 29.0 (25.5-32.0) 20.0 (5.4-36.0) 1.23 (1.03-3.62) 0.90 (0.50-1.90) 18.5 (10.5-28.0) 0.37 (0.23-0.69) 5 27.3 (26.5-31.5) 33.5 (22.0-38.5) 1.34 (1.18-3.1) 1.10 (0.95-1.90) 24.5 (12.5-29) 0.41 (0.25-0.69)

Table 1: Mean and range values of the physical and chemical variables from the Hidrochemical Regions (HchR) in Bahía de la Ascension. Dissolved inorganic nitrogen DIN, (NO2+NO3+NH4), soluble reactive phosphorus (SRP), soluble reactive silica (SRSi), and Chlorophyll-a (Chl-a), (Arellano-Méndez, 2004).