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. 2023 Jun 5;11:e15487. doi: 10.7717/peerj.15487

Table 2. Water physicochemistry per scenario and season.

Values are means (n = 3) for each scenario and season with standard error in parenthesis.

1-Forest—Pasture 2-Pasture—Forest 3- Forest—Coffee plantation
Dry Transition Wet Dry Transition Wet Dry Transition Wet
Discharge (m3/s) 20.26 47.32 248.52 28.99 66.41 213.21 8.57 15.98 21.20
(5.43) (3.70) (8.79) (0.79) (18.49) (9.97) (2.17) (7.18) (1.27)
Temperature (°C) 14.63 15.86 15.63 15.18 17.12 16.97 16.64 19.66 18.42
(0.04) (0.02) (0.02) (0.44) (0.11) (0.13) (0.07) (0.15) (0.05)
Oxygen (mg/L) 6.39 6.55 6.52 5.96 6.03 6.04 6.10 6.55 6.17
(0.04) (0.01) (0.01) (0.18) (0.08) (0.19) (0.05) (0.15) (0.03)
pH 6.93 6.96 6.50 6.62 6.59 5.52 6.72 6.52 6.27
(0.07) (0.03) (0.00) (0.06) (0.18) (0.01) (0.12) (0.20) (0.14)
Conductivity (µS/cm) 32.63 30.29 25.15 23.64 26.96 20.96 49.52 49.81 41.63
(0.70) (0.52) (0.64) (1.15) (0.33) (0.15) (0.43) (0.32) (0.27)
TSS (mg/L) 4.64 11.67 10.35 11.06 8.81 13.33 9.12 10.00 14.40
(1.81) (2.88) (1.99) (3.33) (1.89) (4.10) (2.28) (2.63) (6.82)
Alkalinity (mg CaCO3/L) 23.38 21.70 16.09 19.18 18.89 16.13 31.92 28.41 14.13
(0.14) (0.31) (0.23) (0.35) (0.07) (0.12) (0.09) (0.05) (0.79)
N-NH4 (µM) 3.11 5.81 4.20 0.31 6.85 1.30 4.19 7.22 8.38
(0.34) (0.34) (1.28) (0.26) (1.47) (1.31) (0.28) (0.82) (0.53)
N-NO3 (µM) 14.88 16.65 18.31 11.04 12.05 9.62 16.26 15.17 29.70
(0.31) (0.52) (0.59) (0.88) (1.56) (0.32) (0.75) (0.39) (0.40)
DIN (µM) 18.00 22.46 22.70 11.39 18.91 10.93 20.45 435.93 38.07
(0.09) (0.31) (0.80) (1.11) (2.96) (0.31) (0.51) (221.77) (0.72)
PO4 (mg/L) 0.47 0.36 0.42 0.33 0.25 0.19 0.71 0.33 0.59
(0.10) (0.12) (0.06) (0.06) (0.01) (0.01) (0.20) (0.04) (0.06)
TP (mg/L) 0.47 0.36 0.42 0.33 0.25 0.19 1.33 1.04 1.02
(0.10) (0.12) (0.06) (0.06) (0.01) (0.01) (0.13) (0.29) (0.16)
DIN/PT 20.77 28.84 34.82 13.46 26.36 30.66 15.68 25.29 39.14
(1.70) (2.21) (4.93) (1.20) (5.91) (1.21) (1.82) (6.89) (5.81)
SiO2 (mg/L) 26.31 22.16 20.45 18.86 15.89 14.52 36.33 28.27 28.77
(0.07) (0.09) (0.13) (0.10) (0.20) (0.10) (0.30) (1.43) (0.15)
Cl (mg/L) 5.50 7.00 8.56 5.78 4.98 7.75 6.37 5.64 9.41
(0.11) (0.24) (0.27) (0.38) (0.04) (0.05) (0.21) (0.23) (0.15)
SO2−4 (mg/L) 0.62 1.01 1.50 0.36 1.05 1.16 0.65 0.86 1.86
(0.11) (0.07) (0.07) (0.03) (0.06) (0.07) (0.11) (0.05) (0.07)
Ca2+ (mg/L) 1.10 1.23 0.85 1.38 0.40 1.15 1.01 0.75 0.90
(0.02) (0.28) (0.04) (0.14) (0.18) (0.12) (0.01) (0.03) (0.05)
Na+ (mg/L) 5.80 3.31 2.91 4.66 1.37 2.47 6.85 9.03 8.60
(1.91) (0.12) (0.31) (0.42) (0.05) (0.51) (0.11) (0.44) (1.36)
Mg+ (mg/L) 1.47 1.17 0.53 1.11 0.88 0.38 1.56 1.30 1.25
(0.32) (0.13) (0.03) (0.23) (0.03) (0.07) (0.06) (0.03) (0.10)
K+ (mg/L) 0.35 0.03 0.00 0.46 0.00 0.00 1.33 1.30 0.70
(0.00) (0.02) (0.00) (0.08) (0.00) (0.00) (0.04) (0.05) (0.08)
BOM (g/m2) 5,227.58 3,044.16 1,020.52 4,203.02 4,171.88 1,081.59 3,732.17 1,852.90 1,130.62
(1,344.12) (349.14) (121.16) (531.48) (465.74) (199.64) (1,647.16) (269.41) (131.09)
SOM (mg/L) 607.98 1,003.70 45,389.43 770.57 1,641.49 5,143.52 390.89 425.92 556.81
(114.24) (154.00) (38,716.13) (47.30) (503.99) (391.96) (41.66) (219.15) (69.93)
Chlorophyll a (mg/m2) 1.20 0.47 0.25 0.71 0.27 0.78 0.91 0.90 0.40
(0.59) (0.07) (0.03) (0.23) (0.09) (0.13) (0.15) (0.07) (0.05)