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.
Table:

Monthly average total nitrogen increased by 0.01 mg/L per year.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Increasing trend 8378 37 1990 - 2026 0.4655 0.22938 0.3762 0.00708 0
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. 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.
Table:

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

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Decreasing trend 8872 37 1990 - 2026 0.042 -0.28819 0.06578 -0.00106 0
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Quality

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.
Table:

At two program locations, monthly average dissolved oxygen increased by 0.05 mg/L per year at one site and by 0.09 mg/L per year at the other. At one program location, monthly average dissolved oxygen decreased by 0.04 mg/L per year. No detectable change in monthly average dissolved oxygen was observed at five locations. There was insufficient data to fit a model for two locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
02313700 No detectable trend 2687 9 2018 - 2026 5.6 -0.14 6.15 -0.03 0.1
02323566 Decreasing trend 4147 13 2014 - 2026 1.2 -0.31 1.46 -0.04 0
02326516 No detectable trend 1850 7 2020 - 2026 2.6 0.05 2.6 0.01 0.62
02326526 Increasing trend 3468 10 2016 - 2025 6.7 0.18 6.61 0.05 0.01
BBSCK Insufficient data 14788 1 2023 - 2023 6.7 - - - -
BBSDB No detectable trend 184327 10 2007 - 2016 7.3 -0.05 7.46 -0.01 0.61
BBSSK Increasing trend 134287 10 2004 - 2015 7.1 0.28 6.6 0.09 0
BBSST No detectable trend 151717 6 2019 - 2024 6.8 0.02 6.71 0 0.94
BBSST02 Insufficient data 14062 2 2025 - 2026 7.7 - - - -
BBSSW No detectable trend 182327 8 2009 - 2016 6.2 0 6 0 1
Map showing location of dissolved oxygen continuous water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

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.
Table:

Dissolved oxygen showed no detectable trend between 1985 and 2026.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field No detectable trend 153318 40 1985 - 2026 6.71 0.01264 6.46672 0.00179 0.6744
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. 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.
Table:

At one program location, monthly average dissolved oxygen saturation decreased by 0.81% per year. No detectable change in monthly average dissolved oxygen saturation was observed at three locations. There was insufficient data to fit a model for two locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
BBSCK Insufficient data 19834 1 2023 - 2023 95.7 - - - -
BBSDB Decreasing trend 183530 10 2007 - 2016 97.6 -0.3 100.88 -0.81 0
BBSSK No detectable trend 134196 10 2004 - 2015 91.8 0.12 93.37 0.36 0.26
BBSST No detectable trend 154771 6 2019 - 2024 93.2 0.08 92.61 0.26 0.52
BBSST02 Insufficient data 14062 2 2025 - 2026 96.1 - - - -
BBSSW No detectable trend 182158 8 2009 - 2016 75.8 -0.05 79.14 -0.25 0.68
Map showing location of dissolved oxygen saturation continuous water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. 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.
Table:

Monthly average dissolved oxygen saturation decreased by 0.71% per year.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field Decreasing trend 2038 21 1999 - 2025 67.6 -0.17844 82.19926 -0.71152 0.0025
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. 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.
Table:

Monthly average salinity decreased by 0.06 ppt per year.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
All Decreasing trend 158553 42 1964 - 2026 23.3 -0.09982 23.94074 -0.05636 0.0044
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Salinity - Continuous

National Water Information System - 7

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.
Table:

At two program locations, monthly average salinity increased by 0.53 ppt per year at one site and by 0.76 ppt per year at the other. At four program locations, monthly average salinity decreased between less than 0.01 and 0.75 ppt per year. No detectable change in monthly average salinity was observed at one location. There was insufficient data to fit a model for four locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
02313700 Increasing trend 1601 7 2002 - 2009 2.1 0.52 0.1 0.53 0
02323592 Decreasing trend 6064 16 2000 - 2015 0.1 -0.13 0.18 0 0.02
02326550 Increasing trend 2507 8 2002 - 2009 1.7 0.48 0.09 0.76 0
291652083064100 Insufficient data 827 1 2000 - 2000 6.7 - - - -
291842083085100 Insufficient data 584 1 2000 - 2000 3.7 - - - -
Map showing location of salinity continuous water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Big Bend Seagrasses Aquatic Preserves Continuous Water Quality Monitoring - 471

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.
Table:

At two program locations, monthly average salinity increased by 0.53 ppt per year at one site and by 0.76 ppt per year at the other. At four program locations, monthly average salinity decreased between less than 0.01 and 0.75 ppt per year. No detectable change in monthly average salinity was observed at one location. There was insufficient data to fit a model for four locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
BBSCK Insufficient data 14782 1 2023 - 2023 29.2 - - - -
BBSDB Decreasing trend 265544 10 2007 - 2016 30.6 -0.53 33.78 -0.75 0
BBSSK Decreasing trend 178356 10 2004 - 2015 29.6 -0.22 30.77 -0.21 0.02
BBSST No detectable trend 158160 6 2019 - 2024 28.5 0.08 27.59 0.15 0.52
BBSST02 Insufficient data 14062 2 2025 - 2026 32.6 - - - -
BBSSW Decreasing trend 221696 8 2009 - 2016 7.5 -0.23 10.39 -0.65 0.02
Map showing location of salinity continuous water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Temperature - Continuous

National Water Information System - 7

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.
Table:

At five program locations, monthly average water temperature increased between 0.02 and 0.28°C per year. At one program location, monthly average water temperature decreased by 0.37°C per year. No detectable change in monthly average water temperature was observed at five locations. There was insufficient data to fit a model for five locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
02313700 Increasing trend 4358 16 2002 - 2026 22.9 0.17 22.36 0.03 0.01
02323566 Increasing trend 4288 13 2014 - 2026 22.6 0.79 22.39 0.04 0
02323592 No detectable trend 13384 24 2000 - 2026 23.3 0.02 22.64 0 0.68
02326050 Increasing trend 1964 6 2021 - 2026 21.6 0.28 20.94 0.28 0.01
02326516 Increasing trend 1884 7 2020 - 2026 20.6 0.43 20.53 0.02 0
02326526 No detectable trend 3525 10 2016 - 2025 21.5 -0.08 21.15 -0.02 0.29
02326550 Increasing trend 5349 14 2002 - 2026 22.3 0.24 21.26 0.05 0
02327022 Insufficient data 743 3 2023 - 2025 21.4 - - - -
291652083064100 Insufficient data 473 1 2000 - 2000 26.1 - - - -
291842083085100 Insufficient data 542 1 2000 - 2000 23.1 - - - -
Map showing location of water temperature continuous water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Big Bend Seagrasses Aquatic Preserves Continuous Water Quality Monitoring - 471

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.
Table:

At five program locations, monthly average water temperature increased between 0.02 and 0.28°C per year. At one program location, monthly average water temperature decreased by 0.37°C per year. No detectable change in monthly average water temperature was observed at five locations. There was insufficient data to fit a model for five locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
BBSCK Insufficient data 22232 1 2023 - 2023 26.4 - - - -
BBSDB No detectable trend 265988 10 2007 - 2016 23.2 0.08 22.34 0.04 0.29
BBSSK Decreasing trend 179213 10 2004 - 2015 21.7 -0.33 25.19 -0.37 0
BBSST No detectable trend 163227 6 2019 - 2024 23.5 0.1 24.44 0.1 0.52
BBSST02 Insufficient data 14062 2 2025 - 2026 16.5 - - - -
BBSSW No detectable trend 227996 8 2009 - 2016 23.7 0.02 23.09 0.01 0.9
Map showing location of water temperature continuous water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. 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.
Table:

Monthly average water temperature increased by 0.04°C per year.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field Increasing trend 160159 43 1964 - 2026 24.1 0.19824 21.30551 0.03697 0
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. 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.
Table:

At three program locations, monthly average pH increased between 0.02 and 0.03 pH units per year. At three program locations, monthly average pH decreased between 0.02 and 0.06 pH units per year. No detectable change in monthly average pH was observed at two locations. There was insufficient data to fit a model for two locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
02313700 Increasing trend 2470 8 2018 - 2025 7.6 0.22 7.58 0.02 0.02
02323566 No detectable trend 3751 12 2014 - 2025 7.2 -0.08 7.21 0 0.25
02326516 Increasing trend 1485 6 2020 - 2025 7.7 0.4 7.63 0.02 0
02326526 Increasing trend 3274 10 2016 - 2025 8.0 0.26 7.94 0.03 0
BBSCK Insufficient data 18185 1 2023 - 2023 8.1 - - - -
BBSDB Decreasing trend 250183 10 2007 - 2016 8.1 -0.28 8.17 -0.02 0
BBSSK Decreasing trend 168278 10 2004 - 2015 8.1 -0.37 8.28 -0.04 0
BBSST No detectable trend 155352 6 2019 - 2024 8.0 0 7.95 0 1
BBSST02 Insufficient data 14062 2 2025 - 2026 8.0 - - - -
BBSSW Decreasing trend 224733 8 2009 - 2016 7.6 -0.29 7.8 -0.06 0
Map showing location of ph continuous water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. 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.
Table:

pH showed no detectable trend between 1964 and 2026.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field No detectable trend 110756 39 1964 - 2026 8 -0.02539 7.91015 -0.0006 0.5335
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Specific Conductivity - Continuous

National Water Information System - 7

Scatter plot of monthly average specific conductivity 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 specific conductivity 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.
Table:

At four program locations, monthly average specific conductivity increased between less than 0.01 and 0.67 mS/cm per year. At three program locations, monthly average specific conductivity decreased between 0.28 and 1.06 mS/cm per year. No detectable change in monthly average specific conductivity was observed at four locations. There was insufficient data to fit a model for three locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
02313700 Increasing trend 2687 9 2018 - 2026 3.72 0.36 1.55 0.67 0
02323566 Increasing trend 4250 13 2014 - 2026 0.52 0.47 0.51 0 0
02323592 No detectable trend 10980 23 2000 - 2026 0.31 -0.03 0.33 0 0.51
02326050 No detectable trend 2254 6 2021 - 2026 0.25 0.22 0.17 0.02 0.07
02326516 Increasing trend 1817 7 2020 - 2026 0.28 0.43 0.28 0 0
02326526 Increasing trend 3511 10 2016 - 2025 0.29 0.23 0.29 0 0
02326550 No detectable trend 3228 6 2021 - 2026 2.88 0.24 2.35 0.97 0.05
02327022 Insufficient data 694 3 2023 - 2025 0.32 - - - -
Map showing location of specific conductivity continuous water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of specific conductivity continuous water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Big Bend Seagrasses Aquatic Preserves Continuous Water Quality Monitoring - 471

Scatter plot of monthly average specific conductivity 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 specific conductivity 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.
Table:

At four program locations, monthly average specific conductivity increased between less than 0.01 and 0.67 mS/cm per year. At three program locations, monthly average specific conductivity decreased between 0.28 and 1.06 mS/cm per year. No detectable change in monthly average specific conductivity was observed at four locations. There was insufficient data to fit a model for three locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
BBSCK Insufficient data 14782 1 2023 - 2023 45.17 - - - -
BBSDB Decreasing trend 265988 10 2007 - 2016 47.08 -0.53 51.35 -1.04 0
BBSSK Decreasing trend 178359 10 2004 - 2015 45.80 -0.22 47.32 -0.28 0.02
BBSST No detectable trend 158160 6 2019 - 2024 44.13 0.08 42.86 0.21 0.52
BBSST02 Insufficient data 14062 2 2025 - 2026 49.82 - - - -
BBSSW Decreasing trend 221696 8 2009 - 2016 13.01 -0.23 17.94 -1.06 0.02
Map showing location of specific conductivity continuous water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of specific conductivity continuous water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Clarity

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.
Table:

At one program location, monthly average turbidity increased by 1.22 NTU per year. At two program locations, monthly average turbidity decreased by 0.55 NTU per year at one site and by 0.99 NTU per year at the other. No detectable change in monthly average turbidity was observed at one location. There was insufficient data to fit a model for two locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
BBSCK Insufficient data 23243 1 2023 - 2023 7 - - - -
BBSDB Increasing trend 224613 10 2007 - 2016 1 0.49 1.47 1.22 0
BBSSK No detectable trend 165043 10 2004 - 2015 5 0.11 6.35 0.3 0.19
BBSST Decreasing trend 157392 6 2019 - 2024 4 -0.31 6.73 -0.55 0.01
BBSST02 Insufficient data 12659 2 2025 - 2026 2 - - - -
BBSSW Decreasing trend 202699 8 2009 - 2016 6 -0.35 12.41 -0.99 0
Map showing location of turbidity continuous water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

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.
Table:

Monthly average turbidity decreased by 0.04 NTU per year, indicating an increase in water clarity.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Decreasing trend 43103 37 1990 - 2026 3.4 -0.11943 4.5907 -0.03853 0.0005
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. 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.
Table:

Monthly average total suspended solids decreased by 0.06 mg/L per year, indicating an increase in water clarity.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Decreasing trend 3049 36 1990 - 2025 4 -0.28053 5.15595 -0.0625 0
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. 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.
Table:

Monthly average chlorophyll a, uncorrected for pheophytin, increased by 0.06 µg/L per year, indicating a decrease in water clarity.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Increasing trend 6514 37 1990 - 2026 1.2 0.22862 0.9191 0.06385 0
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. 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.
Table:

Monthly average chlorophyll a, corrected for pheophytin, increased by 0.06 µg/L per year, indicating a decrease in water clarity.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Increasing trend 5149 32 1995 - 2026 1.1 0.18711 1.34478 0.06153 0
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. 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).
Table:

Secchi depth showed no detectable trend between 1986 and 2026.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field No detectable trend 62889 38 1986 - 2026 -0.9 0.06372 -1.30144 0.00321 0.0836
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. 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.
Table:

Monthly average colored dissolved organic matter increased by 1.61 PCU per year, indicating a decrease in water clarity.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Increasing trend 3001 26 2001 - 2026 18 0.45921 -12.73398 1.61373 0
Map showing location of discrete water quality sampling locations within the boundaries of Big Bend Seagrasses Aquatic Preserve. 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 Big Bend Seagrasses Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.