Indicators

Nutrients

Total Nitrogen - Discrete

Scatter plot of monthly average total nitrogen over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only nitrogen values obtained from laboratory analyses (triangles) are included in the plot.
Scatter plot of monthly average total nitrogen over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only nitrogen values obtained from laboratory analyses (triangles) are included in the plot.
Seasonal Kendall-Tau Results for - Total Nitrogen
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab No significant trend 6084 29 1997 - 2025 0.54799 0.02147 0.59633 0.00076 0.5963

Total nitrogen showed no detectable trend between 1997 and 2025.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Total Phosphorus - Discrete

Scatter plot of monthly average total phosphorus over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only phosphorus values obtained from laboratory analyses (triangles) are included in the plot.
Scatter plot of monthly average total phosphorus over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only phosphorus values obtained from laboratory analyses (triangles) are included in the plot.
Seasonal Kendall-Tau Results for - Total Phosphorus
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Significantly decreasing trend 9654 29 1997 - 2025 0.071 -0.21046 0.08622 -0.00074 0

Monthly average total phosphorus decreased by less than 0.01 mg/L per year.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Quality

Dissolved Oxygen - Discrete

Scatter plot of monthly average dissolved oxygen over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only dissolved oxygen values measured in the field (circles) are included in the plot.
Scatter plot of monthly average dissolved oxygen over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only dissolved oxygen values measured in the field (circles) are included in the plot.
Seasonal Kendall-Tau Results for - Dissolved Oxygen
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field Significantly decreasing trend 22598 31 1995 - 2025 6 -0.17006 6.20085 -0.02525 0

Monthly average dissolved oxygen decreased by 0.03 mg/L per year.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Dissolved Oxygen - Continuous

Scatter plot of monthly average dissolved oxygen over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Scatter plot of monthly average dissolved oxygen over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Seasonal Kendall-Tau Results - Dissolved Oxygen
Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
gtmfmwq Significantly increasing trend 703785 25 2001 - 2025 6.4 0.09 6.27 0.00 0.0266
gtmpiwq Significantly decreasing trend 685087 25 2001 - 2025 5.8 -0.09 5.78 -0.01 0.037
gtmsswq Significantly increasing trend 684715 24 2002 - 2025 6.3 0.09 5.90 0.01 0.0424
gtmpcwq No significant trend 721785 25 2001 - 2025 5.5 0.05 5.24 0.00 0.251

At two program locations, monthly average dissolved oxygen increased by less than 0.01 mg/L per year at one site and by 0.01 mg/L per year at the other. At one program location, monthly average dissolved oxygen decreased by 0.01 mg/L per year. No detectable change in monthly average dissolved oxygen was observed at one location.

Map showing location of dissolved oxygen continuous water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of dissolved oxygen continuous water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Dissolved Oxygen Saturation - Discrete

Scatter plot of monthly average dissolved oxygen saturation over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only dissolved oxygen saturation values measured in the field (circles) are included in the plot.
Scatter plot of monthly average dissolved oxygen saturation over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only dissolved oxygen saturation values measured in the field (circles) are included in the plot.
Seasonal Kendall-Tau Results for - Dissolved Oxygen Saturation
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field Significantly increasing trend 2506 23 1999 - 2024 81.6 0.1326 78.00961 0.28034 0.0083

Monthly average dissolved oxygen saturation increased by 0.28% per year.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Dissolved Oxygen Saturation - Continuous

Scatter plot of monthly average dissolved oxygen saturation over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Scatter plot of monthly average dissolved oxygen saturation over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Seasonal Kendall-Tau Results - Dissolved Oxygen Saturation
Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
gtmfmwq Significantly increasing trend 716828 25 2001 - 2025 92.7 0.16 89.57 0.09 1e-04
gtmsswq Significantly increasing trend 690652 24 2002 - 2025 89.4 0.15 84.21 0.11 6e-04
gtmpcwq No significant trend 723278 25 2001 - 2025 71.4 0.01 67.88 0.02 0.6851
gtmpiwq Significantly decreasing trend 690905 25 2001 - 2025 82.2 -0.17 81.97 -0.16 0

At two program locations, monthly average dissolved oxygen saturation increased by 0.09% per year at one site and by 0.11% per year at the other. At one program location, monthly average dissolved oxygen saturation decreased by 0.16% per year. No detectable change in monthly average dissolved oxygen saturation was observed at one location.

Map showing location of dissolved oxygen saturation continuous water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of dissolved oxygen saturation continuous water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Salinity - Discrete

Scatter plot of monthly average salinity over time. If the time series included ten or more years of discrete observations, significant (blue) or non-significant (magenta) trend lines are also shown. Discrete salinity values derived from grab samples analyzed in the field (circles) or the laboratory (triangles) are both included in the plot.
Scatter plot of monthly average salinity over time. If the time series included ten or more years of discrete observations, significant (blue) or non-significant (magenta) trend lines are also shown. Discrete salinity values derived from grab samples analyzed in the field (circles) or the laboratory (triangles) are both included in the plot.
Seasonal Kendall-Tau Results for - Salinity
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
All Significantly decreasing trend 26001 32 1980 - 2025 31.7 -0.37842 37.89414 -0.328 0

Monthly average salinity decreased by 0.33 ppt per year.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Salinity - Continuous

Scatter plot of monthly average salinity over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Scatter plot of monthly average salinity over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Seasonal Kendall-Tau Results - Salinity
Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
gtmfmwq Significantly decreasing trend 691675 25 2001 - 2025 34.40 -0.16 34.89 -0.06 1e-04
gtmpcwq Significantly decreasing trend 731565 25 2001 - 2025 16.60 -0.14 17.1 -0.21 0.0013
gtmsswq Significantly decreasing trend 669355 24 2002 - 2025 33.90 -0.12 34.16 -0.05 0.0051
gtmpiwq Significantly decreasing trend 689204 25 2001 - 2025 27.90 -0.26 32.47 -0.31 0
872-0494 Insufficient data to calculate trend 34918 2 2020 - 2021 8.99 - - - -

At four program locations, monthly average salinity decreased between 0.05 and 0.31 ppt per year. There was insufficient data to fit a model for one location.

Map showing location of salinity continuous water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of salinity continuous water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Temperature - Discrete

Scatter plot of monthly average water temperature over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only water temperature measurements taken in the field (circles) are included in the plot.
Scatter plot of monthly average water temperature over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only water temperature measurements taken in the field (circles) are included in the plot.
Seasonal Kendall-Tau Results for - Water Temperature
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field Significantly increasing trend 25499 31 1995 - 2025 23.3 0.22385 22.19797 0.05715 0

Monthly average water temperature increased by 0.06°C per year.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Temperature - Continuous

Scatter plot of monthly average water temperature over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Scatter plot of monthly average water temperature over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Seasonal Kendall-Tau Results - Water Temperature
Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
gtmpiwq Significantly increasing trend 739497 25 2001 - 2025 24.30 0.2 23.53 0.04 0
gtmpcwq Significantly increasing trend 740131 25 2001 - 2025 24.40 0.17 23.61 0.05 0
gtmfmwq Significantly increasing trend 736711 25 2001 - 2025 23.80 0.23 22.99 0.05 0
gtmsswq Significantly increasing trend 702992 24 2002 - 2025 23.90 0.24 22.94 0.06 0
872-0494 Insufficient data to calculate trend 35473 2 2020 - 2021 22.34 - - - -

At four program locations, monthly average water temperature increased between 0.04 and 0.06°C per year. There was insufficient data to fit a model for one location.

Map showing location of water temperature continuous water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of water temperature continuous water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

pH - Discrete

Scatter plot of monthly average pH over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only pH values measured in the field (circles) are included in the plot.
Scatter plot of monthly average pH over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only pH values measured in the field (circles) are included in the plot.
Seasonal Kendall-Tau Results for - pH
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field Significantly decreasing trend 18867 31 1995 - 2025 7.8 -0.36688 7.85216 -0.01396 0

Monthly average pH decreased by 0.01 pH units per year.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

pH - Continuous

Scatter plot of monthly average pH over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Scatter plot of monthly average pH over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Seasonal Kendall-Tau Results - pH
Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
gtmfmwq Significantly decreasing trend 687856 25 2001 - 2025 8.0 -0.15 7.98 0 4e-04
gtmpiwq Significantly decreasing trend 682135 25 2001 - 2025 7.6 -0.17 7.61 0 0
gtmpcwq Significantly decreasing trend 716012 25 2001 - 2025 7.4 -0.10 7.44 0 0.0191
gtmsswq No significant trend 660421 24 2002 - 2025 7.9 0.00 7.85 0 0.8399

At three program locations, monthly average pH decreased between less than 0.01 and less than 0.01 pH units per year. No detectable change in monthly average pH was observed at one location.

Map showing location of ph continuous water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of ph continuous water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Clarity

Turbidity - Discrete

Scatter plot of monthly average turbidity over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only turbidity values measured in the laboratory (triangles) are included in the plot.
Scatter plot of monthly average turbidity over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only turbidity values measured in the laboratory (triangles) are included in the plot.
Seasonal Kendall-Tau Results for - Turbidity
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Significantly increasing trend 14877 30 1995 - 2024 4.5 0.25627 4.57195 0.09592 0

Monthly average turbidity increased by 0.1 NTU per year, indicating a decrease in water clarity.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Turbidity - Continuous

Scatter plot of monthly average turbidity over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Scatter plot of monthly average turbidity over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Seasonal Kendall-Tau Results - Turbidity
Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
gtmpcwq Significantly decreasing trend 707002 25 2001 - 2025 9 -0.17 9.57 -0.11 1e-04
gtmsswq No significant trend 655978 24 2002 - 2025 9 -0.01 9.89 -0.01 0.8029
gtmpiwq Significantly decreasing trend 665212 25 2001 - 2025 10 -0.10 14.70 -0.08 0.0107
gtmfmwq Significantly decreasing trend 702940 25 2001 - 2025 7 -0.12 9.14 -0.07 0.003

At three program locations, monthly average turbidity decreased between 0.07 and 0.11 NTU per year. No detectable change in monthly average turbidity was observed at one location.

Map showing location of turbidity continuous water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of turbidity continuous water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Total Suspended Solids - Discrete

Scatter plot of monthly average total suspended solids (TSS) over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only TSS values obtained from laboratory analyses (triangles) are included in the plot.
Scatter plot of monthly average total suspended solids (TSS) over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only TSS values obtained from laboratory analyses (triangles) are included in the plot.
Seasonal Kendall-Tau Results for - Total Suspended Solids
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Significantly decreasing trend 5181 29 1997 - 2025 17 -0.38374 29.8329 -0.63307 0

Monthly average total suspended solids decreased by 0.63 mg/L per year, indicating an increase in water clarity.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Chlorophyll a, Uncorrected for Pheophytin - Discrete

Scatter plot of monthly average levels of chlorophyll a, uncorrected for pheophytin, over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only laboratory-analyzed chlorophyll a (triangles) is included in the plot.
Scatter plot of monthly average levels of chlorophyll a, uncorrected for pheophytin, over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only laboratory-analyzed chlorophyll a (triangles) is included in the plot.
Seasonal Kendall-Tau Results for - Chlorophyll a, Uncorrected for Pheophytin
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Significantly increasing trend 6450 24 2002 - 2025 6.2 0.26174 5.31184 0.19634 0

Monthly average chlorophyll a, uncorrected for pheophytin, increased by 0.2 µg/L per year, indicating a decrease in water clarity.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Chlorophyll a, Corrected for Pheophytin - Discrete

Scatter plot of monthly average levels of chlorophyll a, corrected for pheophytin, over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only laboratory-analyzed chlorophyll a (triangles) is included in the plot.
Scatter plot of monthly average levels of chlorophyll a, corrected for pheophytin, over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only laboratory-analyzed chlorophyll a (triangles) is included in the plot.
Seasonal Kendall-Tau Results for - Chlorophyll a, Corrected for Pheophytin
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Significantly increasing trend 8243 24 2002 - 2025 4.7 0.3187 3.72118 0.18184 0

Monthly average chlorophyll a, corrected for pheophytin, increased by 0.18 µg/L per year, indicating a decrease in water clarity.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Secchi Depth - Discrete

Scatter plot of monthly average Secchi depth over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Secchi depth is only measured in the field (circles).
Scatter plot of monthly average Secchi depth over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Secchi depth is only measured in the field (circles).
Seasonal Kendall-Tau Results for - Secchi Depth
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field No significant trend 2995 25 1999 - 2024 -0.8 0.05784 -0.8596 0.00208 0.2391

Secchi depth showed no detectable trend between 1999 and 2024.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Colored Dissolved Organic Matter - Discrete

Scatter plot of monthly average colored dissolved organic matter (CDOM) over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only laboratory-analyzed CDOM (triangles) is included in the plot.
Scatter plot of monthly average colored dissolved organic matter (CDOM) over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only laboratory-analyzed CDOM (triangles) is included in the plot.
Seasonal Kendall-Tau Results for - Colored Dissolved Organic Matter
Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Significantly decreasing trend 1939 14 2007 - 2025 33 -0.24373 46.36942 -1.18828 3e-04

Monthly average colored dissolved organic matter decreased by 1.19 PCU per year, indicating an increase in water clarity.

Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Guana Tolomato Matanzas National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.