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Background

Dashboard: https://shiny.tbep.org/landuse-change/

The habitats of Tampa Bay provide food, shelter, and other important services that support birds, fish, mammals, and invertebrates. Significant habitat alteration and loss has occurred with development activities. To address these challenges, the Habitat Master Plan (2020 Update) [1] provides a set of targets and goals that, if achieved, will provide a healthy and balanced coverage of native habitats in Tampa Bay and its watershed.

This update builds on the previous Habitat Master Plan [2] in several ways. The target and goal setting approach is informed by past changes and over forty years of habitat restoration experience in the region. The approach also identifies what is possible today rather than replicating past ecological conditions and accounts for the potential future effects of sea-level rise, climate change, and development. The Habitat Master Plan defines 10-year (2030) habitat protection and restoration targets and 30-year (2050) goals. Maps of habitat protection and restoration opportunity areas where these targets and goals can be attained are additional products available under the new plan. Please visit https://tbep.org/habitat-master-plan-update/ for additional information.

Datasets

Three internal datasets in tbeptools provide the necessary information to create the Habitat Master Plan report card.

  1. Summary of annual acreage estimates for each major habitat type in intertidal and supratidal strata.

    acres
    #> # A tibble: 90 × 3
    #> # Groups:   name [9]
    #>    name  HMPU_TARGETS                       Acres
    #>    <chr> <chr>                              <dbl>
    #>  1 1990  Coastal Uplands                    5078.
    #>  2 1990  Developed                        372438.
    #>  3 1990  Forested Freshwater Wetlands     159561.
    #>  4 1990  Mangrove Forests                  13522.
    #>  5 1990  Native Uplands                   229990.
    #>  6 1990  Non-Forested Freshwater Wetlands  54454.
    #>  7 1990  Open Water                        38357.
    #>  8 1990  Restorable                       571513.
    #>  9 1990  Salt Barrens                        468 
    #> 10 1990  Salt Marshes                       4482.
    #> # … with 80 more rows
  2. Summary of annual acreage estimates for each major habitat type in the subtidal stratam.

    subtacres
    #> # A tibble: 61 × 3
    #> # Groups:   name [16]
    #>    name  HMPU_TARGETS    Acres
    #>    <chr> <chr>           <dbl>
    #>  1 1988  Open Water   197168. 
    #>  2 1988  Restorable       46.1
    #>  3 1988  Seagrasses    22999. 
    #>  4 1988  Tidal Flats   21497. 
    #>  5 1990  Open Water   196418. 
    #>  6 1990  Restorable       39.6
    #>  7 1990  Seagrasses    24923. 
    #>  8 1990  Tidal Flats   20279. 
    #>  9 1992  Open Water   195268. 
    #> 10 1992  Restorable       58.6
    #> # … with 51 more rows
  3. A table of targets and goals for each major habitat type, developed in the Habitat Master Plan 2020 update [1] (only select columns shown).

    hmptrgs[, c("Category", "HMPU_TARGETS", "Target2030", "Goal2050")]
    #>      Category                     HMPU_TARGETS Target2030 Goal2050
    #> 1    Subtidal                      Hard Bottom      423.0    423.0
    #> 2    Subtidal                 Artificial Reefs      166.0    166.0
    #> 3    Subtidal                      Tidal Flats    16220.0  16220.0
    #> 4    Subtidal                       Seagrasses    40000.0  40000.0
    #> 5    Subtidal                      Oyster Bars      221.0    471.0
    #> 6  Intertidal                Living Shorelines       21.3     56.3
    #> 7  Intertidal                 Total Intertidal    21353.0  23803.0
    #> 8  Intertidal                 Mangrove Forests    15300.0  15300.0
    #> 9  Intertidal                     Salt Barrens      546.0    796.0
    #> 10 Intertidal                     Salt Marshes     4807.0   5457.0
    #> 11 Intertidal                Tidal Tributaries        4.0     18.0
    #> 12 Supratidal                  Coastal Uplands     3769.0   4219.0
    #> 13 Supratidal Non-Forested Freshwater Wetlands    68937.0  71787.0
    #> 14 Supratidal     Forested Freshwater Wetlands   152282.0 152732.0
    #> 15 Supratidal                   Native Uplands   141050.0 142100.0

These datasets are created in the repository https://github.com/tbep-tech/hmpu-workflow and require updates as land use and cover datasets are produced every two to three years by the Southwest Florida Water Management District.

Report card summary

An important reporting product for the Habitat Master Plan is a report card that summarizes attainment of targets and goals and evaluates prior trends to identify if coverages are trending above or below the targets or goals. Two functions are provided in tbeptools to create this report card. The anlz_hmpreport() summarizes the above datasets to provide the necessary information for creating the report card. The show_hmpreport() generates the plot for the report card. The latter can be used by itself and the former is only provided if there is a need to view the data behind the report card.

Using the anlz_hmpreport() function summarizes the acreage coverage estimates for each habitat type, compares them to the targets and goals for each year of data, and assesses the coverage trend between year pairs to determine if the changes are trending above or below the targets and goals.

anlz_hmpreport(acres = acres, subtacres = subtacres, hmptrgs = hmptrgs)
#> # A tibble: 146 × 17
#>    year  metric  Acres lacres   lyr categ…¹ Target  Goal acres…² yeard…³ chang…⁴
#>    <chr> <chr>   <dbl>  <dbl> <dbl> <chr>    <dbl> <dbl>   <dbl>   <dbl>   <dbl>
#>  1 1995  Mangr… 14350. 13522.  1990 Inter    15300 15300  828.         5 166.   
#>  2 1995  Salt …   479    468   1990 Inter      546   796   11          5   2.2  
#>  3 1995  Salt …  4436.  4482.  1990 Inter     4807  5457  -45.8        5  -9.17 
#>  4 1995  Total… 19265. 18472.  1990 Inter    21353 23803  793.         5 159.   
#>  5 1999  Mangr… 14314. 14350.  1995 Inter    15300 15300  -36.9        4  -9.22 
#>  6 1999  Salt …   492    479   1995 Inter      546   796   13          4   3.25 
#>  7 1999  Salt …  4442.  4436.  1995 Inter     4807  5457    6.09       4   1.52 
#>  8 1999  Total… 19247. 19265.  1995 Inter    21353 23803  -17.8        4  -4.45 
#>  9 2004  Mangr… 15612. 14314.  1999 Inter    15300 15300 1298.         5 260.   
#> 10 2004  Salt …   488.   492   1999 Inter      546   796   -4.30       5  -0.861
#> # … with 136 more rows, 6 more variables: targetrate <dbl>, goalrate <dbl>,
#> #   targetprop <dbl>, goalprop <dbl>, targeteval <dbl>, goaleval <dbl>, and
#> #   abbreviated variable names ¹​category, ²​acresdiff, ³​yeardiff, ⁴​changerate

The columns are as follows:

  • year: Year of the assessment
  • metric: Habitat type assessed
  • Acres: Coverage estimate for the year
  • lacres: Coverage estimate for the previous set of available data
  • lyr: Year for the previous set of available data
  • category: Strata for the habitat type
  • Target: 2030 target for the habitat type from the Habitat Master Plan
  • Goal: 2050 goal for the habitat type from the Habitat Master Plan
  • acresdiff: Difference in acres for the current year and the previous set of available data
  • yeardiff: Difference in years for the current year and the previous set of available data
  • changerate: Acreage change per year for the current year relative to the previous set of available data
  • targetrate: Annual rate required to achieve the 2030 target
  • goalrate: Annual rate required to achieve the 2050 goal
  • targetprop: Proportion of target met for the current year
  • goalprop: Proportion of goal met for the current year
  • targeteval: A number indicating target status of the current year for the report card
  • goaleval: A number indicating goal status of the current year for the report card

The important columns in the output are targetprop, goalprop, targeteval, and goaleval. The targetprop and goalprop columns indicate the proportion of the target or goal met for habitat type in the current assessment year. The targeteval and goaleval columns are one of four values, as -1, 0, 0.5, and 1, for each habitat type and year. These numbers define the habitat status for the assessment year:

  • -1: target or goal not met, trending below
  • 0: target or goal met, trending below
  • 0.5: target or goal not met, trending above
  • 1: target or goal met, trending above

Report card plot

The show_hmpreport() can be used to create the Habitat Master Plan report card. The anlz_hmpreport() function is used internally and does not need to be used separately. The input files are the same.

The plot below shows the report card for the 2030 targets, using typ = "targets". The colors of each cell correspond to the numbers in the targeteval column (or goaleval if typ = "goals") returned by anlz_hmpreport(). The numbers in each cell indicate the proportion of the target from targetprop (or goal from goalprop if typ = "goals") that is met for each habitat type in each assessment year. Note that the creation of datasets to generate the summaries is not continuous each year and varies between the subtidal and inter/supratidal habitat.

show_hmpreport(acres = acres, subtacres = subtacres, hmptrgs = hmptrgs, typ = 'targets')

The 2050 goals report card can be shown using typ = "goals".

show_hmpreport(acres = acres, subtacres = subtacres, hmptrgs = hmptrgs, typ = 'goals')

Finally, the text showing the proportion of the target or goal met each year can be suppressed using text = F.

show_hmpreport(acres = acres, subtacres = subtacres, hmptrgs = hmptrgs, typ = 'targets', text = F)

The matrix can also be produced as a plotly interactive plot by setting plotly = TRUE inside the function.

show_hmpreport(acres = acres, subtacres = subtacres, hmptrgs = hmptrgs, typ = 'targets', plotly = T, width = 750, height = 800)

The report card provides no information on artificial reefs, living shorelines, and hard bottom habitats. These habitats are not assessed in routine data products from the Southwest Florida Water Management District, although targets and goals are provided in the Habitat Master Plan.

References

[1] D. Robison, T. Ries, J. Saarinen, D. Tomasko, C. Sciarrino, Tampa Bay Estuary Program: 2020 Habitat Master Plan Update, Tampa Bay Estuary Program, St. Petersburg, Florida, 2020. https://drive.google.com/file/d/1Hp0l_qtbxp1JxKJoGatdyuANSzQrpL0I/view?usp=drivesdk.

[2] D. Robison, Tampa Bay Estuary Program Habitat Master Plan Update, Tampa Bay Estuary Program, St. Petersburg, Florida, 2010. https://drive.google.com/file/d/13iVkFKFG_EMNGwRWdgPPZfCL5JlatNcr/view?usp=drivesdk.