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Biogeochemical data collected in the eastern marl prairies of the Everglades (Florida, USA) before and after fire, between the years 2018 and 2021


At a Glance


Authors: Andrea Nocentini, John Kominoski
Time period: 2018-09-03 to 2021-03-12
Package id: knb-lter-fce.1233.2

How to cite:
Nocentini, A., J. Kominoski. 2021. Biogeochemical data collected in the eastern marl prairies of the Everglades (Florida, USA) before and after fire, between the years 2018 and 2021. Environmental Data Initiative. https://doi.org/10.6073/pasta/b202c11db7c64943f6b4ed9f8c17fb25. Dataset accessed 2022-12-05.

Geographic Coverage


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Detailed Metadata


  • Dataset Abstract
    The data included in this database were collected within a project funded by Everglades National Park (ENP). The project was aimed at understanding how fire, characterized by different intensities, differentially affects nutrient cycling in oligotrophic wetlands with distinct levels of phosphorus limitation. The data were collected in the eastern part of the Everglades, close to the boundary of ENP, in South Florida (Homestead). This part of ENP is characterized by marl soils, which are shallow (often less than 10 cm) and C-poor. The data were collected at two sites: one site was more oligotrophic (LP), while the other one had a certain degree of phosphorus enrichment (HP). The database includes date and location (i.e. site and plot) of each sampling event, surface water physio-chemistry, vegetation composition and structure, including dominant macrophyte estimated biomass, litter and root decomposition rates, and carbon, nitrogen, and phosphorus concentrations in the soil, flocculent detrital material, periphyton, sawgrass leaves and roots, and the water column. All these data were collected at different times between September 2018 and March 2021, before and after a prescribed fire that was carried out in February 2020 and which burned all the plots. Each row within the database identifies a unique combination of date and sampling plot.
  • Geographic Coverage
    Bounding Coordinates
    West of Aerojet Road (Homestead, FL, USA): two sites located half way along and at the end of the Aerojet Canal
    N: 25.35168, S: 25.31937556, E: -80.56669166, W: -80.56669166

  • Attributes
    • Data Table:   Biogeochemical data collected in the eastern marl prairies of the Everglades (Florida, USA) before and after fire, between the years 2018 and 2021
      Attribute Name:
      Site_name
      Attribute Label:
      Attribute Definition:
      Name of the site (LP=low phosphorus; HP=high phosphorus).
      Storage Type:
      string
      Measurement Scale:
      Name of the site (LP=low phosphorus; HP=high phosphorus).
      Missing Value Code:
       

      Attribute Name:
      Plot
      Attribute Label:
      Attribute Definition:
      Name of the plot. Each site was composed of three transects, each of them including three plots. C are the plots closest to the Aerojet canal; S are the plots furthest from the Aerojet canal; MS are the plots in the middle; within each site, 1 is the southernmost transect, while 3 is the northernmost transect.
      Storage Type:
      string
      Measurement Scale:
      Name of the plot. Each site was composed of three transects, each of them including three plots. C are the plots closest to the Aerojet canal; S are the plots furthest from the Aerojet canal; MS are the plots in the middle; within each site, 1 is the southernmost transect, while 3 is the northernmost transect.
      Missing Value Code:
       

      Attribute Name:
      UTM_longitude
      Attribute Label:
      Attribute Definition:
      Longitude, indicating the geographical position of the plot.
      Storage Type:
      float
      Measurement Scale:
      Units: meter
      Number Type: natural
      Missing Value Code:
       

      Attribute Name:
      UTM_latitude
      Attribute Label:
      Attribute Definition:
      Latitude, indicating the geographical position of the plot.
      Storage Type:
      float
      Measurement Scale:
      Units: meter
      Number Type: natural
      Missing Value Code:
       

      Attribute Name:
      Date
      Attribute Label:
      Attribute Definition:
      Date of sampling.
      Storage Type:
      date
      Measurement Scale:
      Missing Value Code:
       

      Attribute Name:
      Year
      Attribute Label:
      Attribute Definition:
      Year of sampling.
      Storage Type:
      date
      Measurement Scale:
      Missing Value Code:
       

      Attribute Name:
      DOY
      Attribute Label:
      Attribute Definition:
      Day of the year as continuous number. Example: February 4th is 35.
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: natural
      Missing Value Code:
       

      Attribute Name:
      Surface_water_depth
      Attribute Label:
      Attribute Definition:
      Depth of the surface water, measured from the surface to the bottom soil.
      Storage Type:
      float
      Measurement Scale:
      Units: centimeter
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_temperature
      Attribute Label:
      Attribute Definition:
      Temperature of the surface water.
      Storage Type:
      float
      Measurement Scale:
      Units: celsius
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_DO
      Attribute Label:
      Attribute Definition:
      Dissolved oxygen of the surface water.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerLiter
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_pH
      Attribute Label:
      Attribute Definition:
      pH of the surface water, indicating the acidity.
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_coductivity
      Attribute Label:
      Attribute Definition:
      Specific conductivity of the surface water.
      Storage Type:
      float
      Measurement Scale:
      Units: microSiemenPerCentimeter
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Soil_depth
      Attribute Label:
      Attribute Definition:
      Depth of the soil, measured from the surface down to the bottom limestone.
      Storage Type:
      float
      Measurement Scale:
      Units: centimeter
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Plant_species_composition
      Attribute Label:
      Attribute Definition:
      List of all the plant species recorded.
      Storage Type:
      string
      Measurement Scale:
      List of all the plant species recorded.
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Count_live_sawgrass
      Attribute Label:
      Attribute Definition:
      Total count of live sawgrass (Cladium jamaicense Crantz) plants.
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: natural
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Count_dead_sawgrass
      Attribute Label:
      Attribute Definition:
      Total count of dead sawgrass (Cladium jamaicense Crantz) plants.
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: whole
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_height
      Attribute Label:
      Attribute Definition:
      Mean height of 15 sawgrass (Cladium jamaicense Crantz) plants, randomly chosen.
      Storage Type:
      float
      Measurement Scale:
      Units: centimeter
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_width
      Attribute Label:
      Attribute Definition:
      Mean stem width of 15 sawgrass (Cladium jamaicense Crantz) plants, randomly chosen.
      Storage Type:
      float
      Measurement Scale:
      Units: millimeter
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Aboveground_estimated_biomass_sawgrass
      Attribute Label:
      Attribute Definition:
      Sawgrass (Cladium jamaicense Crantz) aboveground live biomass estimated using the total count, and the height and width of the 15 plants randomly selected. An allometric relationship was employed for the estimation.
      Storage Type:
      float
      Measurement Scale:
      Units: gramPerMeterSquared
      Number Type: natural
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Soil_TC
      Attribute Label:
      Attribute Definition:
      Total carbon concentration in the soil.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Soil_TN
      Attribute Label:
      Attribute Definition:
      Total nitrogen concentration in the soil.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Soil_TP
      Attribute Label:
      Attribute Definition:
      Total phosphorus concentration in the soil.
      Storage Type:
      float
      Measurement Scale:
      Units: microgramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Soil_OM
      Attribute Label:
      Attribute Definition:
      Organic matter content of the soil.
      Storage Type:
      float
      Measurement Scale:
      Units: percent
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Floc_TC
      Attribute Label:
      Attribute Definition:
      Total carbon concentration in the flocculent detrital material.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Floc_TN
      Attribute Label:
      Attribute Definition:
      Total nitrogen concentration in the flocculent detrital material.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Floc_TP
      Attribute Label:
      Attribute Definition:
      Total phosphorus concentration in the flocculent detrital material.
      Storage Type:
      float
      Measurement Scale:
      Units: microgramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Periphyton_TC
      Attribute Label:
      Attribute Definition:
      Total carbon concentration in the periphyton mats.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Periphyton_TN
      Attribute Label:
      Attribute Definition:
      Total nitrogen concentration in the periphyton mats.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Periphyton_TP
      Attribute Label:
      Attribute Definition:
      Total phosphorus concentration in the periphyton mats.
      Storage Type:
      float
      Measurement Scale:
      Units: microgramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_leaf_TC
      Attribute Label:
      Attribute Definition:
      Total carbon concentration in sawgrass (Cladium jamaicense Crantz) leaves.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_leaf_TN
      Attribute Label:
      Attribute Definition:
      Total nitrogen concentration in sawgrass (Cladium jamaicense Crantz) leaves.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_leaf_TP
      Attribute Label:
      Attribute Definition:
      Total phosphorus concentration in sawgrass (Cladium jamaicense Crantz) leaves.
      Storage Type:
      float
      Measurement Scale:
      Units: microgramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_coarseroot_TC
      Attribute Label:
      Attribute Definition:
      Total carbon concentration in sawgrass (Cladium jamaicense Crantz) coarse roots.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_coarseroot_TN
      Attribute Label:
      Attribute Definition:
      Total nitrogen concentration in sawgrass (Cladium jamaicense Crantz) coarse roots.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_coarseroot_TP
      Attribute Label:
      Attribute Definition:
      Total phosphorus concentration in sawgrass (Cladium jamaicense Crantz) coarse roots.
      Storage Type:
      float
      Measurement Scale:
      Units: microgramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_fineroot_TC
      Attribute Label:
      Attribute Definition:
      Total carbon concentration in sawgrass (Cladium jamaicense Crantz) fine roots.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_fineroot_TN
      Attribute Label:
      Attribute Definition:
      Total nitrogen concentration in sawgrass (Cladium jamaicense Crantz) fine roots.
      Storage Type:
      float
      Measurement Scale:
      Units: milligramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_fineroot_TP
      Attribute Label:
      Attribute Definition:
      Total phosphorus concentration in sawgrass (Cladium jamaicense Crantz) fine roots.
      Storage Type:
      float
      Measurement Scale:
      Units: microgramPerGram
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_TOC
      Attribute Label:
      Attribute Definition:
      Total organic carbon concentration in the surface water.
      Storage Type:
      float
      Measurement Scale:
      Units: partsPerMillion
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_DOC
      Attribute Label:
      Attribute Definition:
      Total dissolved organic carbon concentration in the surface water.
      Storage Type:
      float
      Measurement Scale:
      Units: partsPerMillion
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_TN
      Attribute Label:
      Attribute Definition:
      Total nitrogen concentration in the surface water.
      Storage Type:
      float
      Measurement Scale:
      Units: partsPerMillion
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_inorganicN
      Attribute Label:
      Attribute Definition:
      Total inorganic nitrogen concentration in the surface water.
      Storage Type:
      float
      Measurement Scale:
      Units: partsPerMillion
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_NO3-N
      Attribute Label:
      Attribute Definition:
      Total nitrogen concentration in the form of nitrate in the surface water.
      Storage Type:
      float
      Measurement Scale:
      Units: partsPerMillion
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_NO2-N
      Attribute Label:
      Attribute Definition:
      Total nitrogen concentration in the form of nitrite in the surface water.
      Storage Type:
      float
      Measurement Scale:
      Units: partsPerMillion
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_NH3/NH4-N
      Attribute Label:
      Attribute Definition:
      Total nitrogen concentration in the form of ammonia/ammonium in the surface water.
      Storage Type:
      float
      Measurement Scale:
      Units: partsPerMillion
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_TP
      Attribute Label:
      Attribute Definition:
      Total phosphorus concentration in the surface water.
      Storage Type:
      float
      Measurement Scale:
      Units: partsPerMillion
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Surface_water_SRP
      Attribute Label:
      Attribute Definition:
      Total soluble reactive phosphorus concentration in the surface water.
      Storage Type:
      float
      Measurement Scale:
      Units: partsPerMillion
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Litter_decomposition_rate
      Attribute Label:
      Attribute Definition:
      k value representing rate of decomposition of sawgrass (Cladium jamaicense Crantz) litter material
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_coarseroot_decomposition_rate
      Attribute Label:
      Attribute Definition:
      k value representing rate of decomposition of sawgrass (Cladium jamaicense Crantz) coarse root material
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: real
      Missing Value Code:
      NA (not measured)

      Attribute Name:
      Sawgrass_fineroot_decomposition_rate
      Attribute Label:
      Attribute Definition:
      k value representing rate of decomposition of sawgrass (Cladium jamaicense Crantz) fine root material
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: real
      Missing Value Code:
      NA (not measured)


  • Methods
    Method Step

    Description
    In each plot, within a 1 × 1m sub-plot we counted the number of live and dead plants of each species, and the height and diameter of n = 15 random sawgrass culms in order to estimate aboveground biomass using previously derived allometric relationships between culm height, diameter and biomass.
    From each plot, sawgrass plants (including roots) were collected before and after fire at different times; all samples were conserved at 4°C until processing. The biomass was divided into shoots (aboveground), and coarse and fine (< 2mm) roots (belowground) and oven-dried at 40°C for 72 h. Afterwards, sub-samples were ground using an 8000D ball mill (SPEX SamplePrep, New Jersey, United States) and analyzed for C, N and P concentrations. For CN samples were ran through a CE Flash 1112 elemental analyzer (CE Elantech, New Jersey, USA) using standard procedures. For P samples underwent a dry-oxidation acid hydrolysis extraction followed by a colorimetric analysis of phosphate using a UV-2450 spectrophotometer (Shimadzu, Kyoto, Japan).
    Every three months, using a digital water quality meter probe (YSI, Ohio, USA), we measured in each plot water temperature, pH, conductivity and dissolved oxygen; water depth was recorded each time as well.
    From each plot, two (filtered and unfiltered) surface water samples were collected before and after fire at different times. All samples were collected into high‐density polyethylene (HDPE) bottles, and one sample at each plot was filtered through a 0.45‐μm nylon membrane filter (Whatman, Inc.). Unfiltered samples were conserved at 4 °C until analysis, while the filtered samples were frozen. The unfiltered samples were analyzed for total organic C (TOC), and total N (TN) and P (TP), while the filtered samples were analyzed for dissolved organic C (DOC), total inorganic N (TIN) and soluble reactive phosphorus (SRP). Total/dissolved organic C was determined by introducing the sample into a combustion tube and oxidizing it to form CO2, which was detected by a Non Dispersive InfraRed (NDIR) detector. TN was determined through conversion to nitric oxide, reaction with ozone, and detection of the chemiluminescent emission by a photomultiplier tube. TP was determined by oxidizing and hydrolyzing all of the phosphorus-containing compounds to SRP. Analysis for inorganic filtered nutrients, ammonia/ammonium as N (NH3/NH4-N), nitrite as N (NO2-N), nitrate and nitrite as N (N+N), and soluble reactive phosphorus as P (SRP), were simultaneously performed by wet chemical analysis using a four-channel Rapid Flow Analyzer based on standard EPA procedures.
    From each plot, one periphyton and one floc (i.e., flocculent detrital organic matter) samples were collected before and after fire at different times. Periphyton was grabbed floating from the water surface or, when the system was dry, from the soil surface. Floc was collected in the water near the soil surface using a baster. Periphyton samples were frozen until analysis, while floc samples were conserved at 4°C. Both periphyton (after cleaning it from dead plant material and rocks) and floc were oven dried at 40°C for several days until their high moisture content completely evaporated. The samples were then ground and analyzed for total C, N and P concentrations.
    In each plot we measured soil depth by sticking a metal rod down in the soil until it reached the underlying limestone.
    From each plot, two soil cores (54-mm diameter) were collected before and after fire at different times; all samples were conserved at 4°C until analysis. At the time of sampling, soil cores depth was recorded in order to derive the volume needed for bulk density calculation. After collection, the fresh weight of soil sub-samples was obtained, then the sub-samples were over-dried at 40°C for 120 h before dry weight measurement. Soil bulk density was calculated as the ratio between the estimated dry weight of the sample and its volume. The dried sub-samples were then ground and analyzed for C, N, and P concentrations.
    Air-dried sawgrass root and leaf material collected at the LP and HP sites was used to study decomposition rates in the soil. The material, divided into litter (leaf), coarse roots and fine roots was placed into 1-mm nylon mesh bags; each bag contained ~3 (leaf litter), ~5 (coarse roots), or ~1 (fine roots) g of dry matter. Before deployment, sub-samples were placed in the oven at 60°C for 72 h to estimate residual moisture content. Root decomposition bags were placed in the soil, at a depth between surface and 20cm, inside the holes dug during soil cores collection. Leaf litter bags were placed on the soil surface, homogenized with the rest of the litter. Each bag was tied with fishing line to a marker stick and to a weight that prevented it from floating. All decomposition bags were incubated in the soil for 1 year before the burn treatment (January 2019 to December 2020), then new bags were placed after the burn for another year (March 2020 to March 2021). After each 1-year period of incubation, the bags were retrieved from the soil, and the material, after being rinsed over a sieve, was oven-dried at 60°C for 72 h before weighing. The difference in mass between deployment date and retrieval date allowed us to calculate decomposition rates. Decomposition rates, expressed as k, were estimated using a linear regression of the ln‐transformed fraction of dry mass remaining versus time. The model is shown in the following equation:
    $$M_{t} = M_{0} \times e^{-kt}$$
    Where M0 is the initial mass, Mt is the mass on a given sampling day, and t is the time of incubation in days.


  • Intellectual Rights
    Intellectual Rights
    This data package is released to the "public domain" under Creative Commons CC0 1.0 "No Rights Reserved" (see: https://creativecommons.org/publicdomain/zero/1.0/). It is considered professional etiquette to provide attribution of the original work if this data package is shared in whole or by individual components. A generic citation is provided for this data package on the website https://portal.edirepository.org (herein "website") in the summary metadata page. Communication (and collaboration) with the creators of this data package is recommended to prevent duplicate research or publication. This data package (and its components) is made available "as is" and with no warranty of accuracy or fitness for use. The creators of this data package and the website shall not be liable for any damages resulting from misinterpretation or misuse of the data package or its components. Periodic updates of this data package may be available from the website. Thank you.

  • Publications citing this dataset
    Nocentini, Andrea, John S. Kominoski, Joseph J. O'Brien, and Jed Redwine. 2022. Fire intensity and ecosystem oligotrophic status drive relative phosphorus release and retention in freshwater marshes. Ecosphere 13: 

    DOI: 10.1002/ecs2.4263

  • Keywords
    subtropical wetland, sawgrass, marl soil, fire, carbon, nitrogen, phosphorus
  • Data Table and Format
    Data Table:  Biogeochemical data collected in the eastern marl prairies of the Everglades (Florida, USA) before and after fire, between the years 2018 and 2021

    Entity Name:
    Aerojet database_Nocentini and Kominoski 2021
    Entity Description:
    Biogeochemical data collected in the eastern marl prairies of the Everglades (Florida, USA) before and after fire, between the years 2018 and 2021
    Object Name:
    FCE1233.txt
    Number of Header Lines:
    1
    Attribute Orientation:
    column
    Field Delimiter:
    ,
    Number of Records:
    234