Skip to Main Content

Organic and inorganic data for soil cores from Brazil and Florida Bay seagrasses to support Howard et al 2018, CO2 released by carbonate sediment production in some coastal areas may offset the benefits of seagrass “Blue Carbon” storage, Limnology and Oceanography, DOI: 10.1002/lno.10621


At a Glance


(Zip file containing 2 files)

Authors: Jason Howard, James Fourqurean
Time period: 2015-06-01 to 2015-08-31
Package id: knb-lter-fce.1228.2
Dataset id:

How to cite:
Howard, J., J. Fourqurean. 2020. Organic and inorganic data for soil cores from Brazil and Florida Bay seagrasses to support Howard et al 2018, CO2 released by carbonate sediment production in some coastal areas may offset the benefits of seagrass “Blue Carbon” storage, Limnology and Oceanography, DOI: 10.1002/lno.10621. Environmental Data Initiative. https://doi.org/10.6073/pasta/45cfe2505580cedf88a82f8911bdd741. Dataset accessed 2020-10-26.

Geographic Coverage
This data set contains the following files.

brazil_cores.csv
Attribute table details     Download

Fl_bay_cores.csv
Attribute table details     Download



View detailed metadata as:   HTML    Text    XML


Detailed Metadata


  • Dataset Abstract
    Using piston corers, soils from Florida Bay and Brazilian seagrass meadows were collected to complete organic and inorganic carbon inventories for the top 1 m of soil. Instrumental analyses and loss on ignition at 500C were used to measure C content of downcore slices.
  • Geographic Coverage
    Bounding Coordinates
    Urca
    N: -22.947603, S: -22.947603, E: -43.163558, W: -43.163558

    Arraial do Cabo
    N: -22.973434, S: -22.973434, E: -42.020278, W: -42.020278

    Ilha do Japones - site 1
    N: -22.881841, S: -22.881841, E: -42.002751, W: -42.002751

    Ilha do Japones - site 2
    N: -22.878932, S: -22.878932, E: -42.003653, W: -42.003653

    Praia dos Ossos
    N: -22.745867, S: -22.745867, E: -41.88145, W: -41.88145

    Praia da Ferradura
    N: -22.772383, S: -22.772383, E: -41.888983, W: -41.888983

    Manguinhos
    N: -22.769126, S: -22.769126, E: -41.912172, W: -41.912172

    Ilha Grande - site 1
    N: -23.104933, S: -23.104933, E: -44.213233, W: -44.213233

    Ilha Grande - site 2
    N: -23.133783, S: -23.133783, E: -44.151083, W: -44.151083

    Bracui - site 1
    N: -22.9571, S: -22.9571, E: -44.384567, W: -44.384567

    Bracui - site 2
    N: -22.957267, S: -22.957267, E: -44.381133, W: -44.381133

    Santa Cruz
    N: -19.95365, S: -19.95365, E: -40.152067, W: -40.152067

    Vitoria
    N: -20.301767, S: -20.301767, E: -40.285967, W: -40.285967

    Vila Velha
    N: -20.325117, S: -20.325117, E: -40.271533, W: -40.271533

    Bob Allen Key
    N: 25.0248, S: 25.0248, E: -80.681, W: -80.681

    rb
    N: 25.0343, S: 25.0343, E: -80.6397, W: -80.6397

    nm
    N: 24.9412, S: 24.9412, E: -80.8642, W: -80.8642

    tc
    N: 25.2148, S: 25.2148, E: -80.5404, W: -80.5404

  • Attributes
    • Data Table:   brazil_cores.csv
      Attribute Name:
      Site
      Attribute Label:
      Attribute Definition:
      Site Name
      Storage Type:
      string
      Measurement Scale:
      Site Name
      Missing Value Code:
       

      Attribute Name:
      Latitude
      Attribute Label:
      Attribute Definition:
      Latitude
      Storage Type:
      float
      Measurement Scale:
      Units: degree
      Number Type: real
      Missing Value Code:
       

      Attribute Name:
      Longitude
      Attribute Label:
      Attribute Definition:
      Longitude
      Storage Type:
      float
      Measurement Scale:
      Units: degree
      Number Type: real
      Missing Value Code:
       

      Attribute Name:
      Rep
      Attribute Label:
      Attribute Definition:
      Core Replicate
      Storage Type:
      string
      Measurement Scale:
      Core Replicate
      Missing Value Code:
       

      Attribute Name:
      depth
      Attribute Label:
      Attribute Definition:
      Depth in Soil Profile
      Storage Type:
      float
      Measurement Scale:
      Units: centimeter
      Number Type: integer
      Missing Value Code:
       

      Attribute Name:
      loi
      Attribute Label:
      Attribute Definition:
      Loss on ignition at 500 C (percent of dry weight of sample)
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: real
      Missing Value Code:
       

      Attribute Name:
      Cinorg
      Attribute Label:
      Attribute Definition:
      Inorganic Carbon Content (percent of dry weight of sample)
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: real
      Missing Value Code:
       

      Attribute Name:
      Corg
      Attribute Label:
      Attribute Definition:
      Organic Carbon Content (percent of dry weight of sample)
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: real
      Missing Value Code:
       

      Attribute Name:
      dbd
      Attribute Label:
      Attribute Definition:
      Dry Bulk Density (grams dry weight per centimeter cubed)
      Storage Type:
      float
      Measurement Scale:
      Units: gramPerCentimeterCubed
      Number Type: real
      Missing Value Code:
       


    • Data Table:   Fl_bay_cores.csv
      Attribute Name:
      Site
      Attribute Label:
      Attribute Definition:
      Site Name
      Storage Type:
      string
      Measurement Scale:
      Site Name
      Missing Value Code:
       

      Attribute Name:
      Lat
      Attribute Label:
      Attribute Definition:
      Latitude
      Storage Type:
      float
      Measurement Scale:
      Units: degree
      Number Type: real
      Missing Value Code:
       

      Attribute Name:
      Long
      Attribute Label:
      Attribute Definition:
      Longitude
      Storage Type:
      float
      Measurement Scale:
      Units: degree
      Number Type: real
      Missing Value Code:
       

      Attribute Name:
      Rep
      Attribute Label:
      Attribute Definition:
      Core Replicate
      Storage Type:
      string
      Measurement Scale:
      Core Replicate
      Missing Value Code:
       

      Attribute Name:
      depth
      Attribute Label:
      Attribute Definition:
      Depth in Soil Profile
      Storage Type:
      float
      Measurement Scale:
      Units: centimeter
      Number Type: integer
      Missing Value Code:
       

      Attribute Name:
      loi
      Attribute Label:
      Attribute Definition:
      Loss on ignition at 500 C (percent of dry weight of sample)
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: real
      Missing Value Code:
       

      Attribute Name:
      Cinorg
      Attribute Label:
      Attribute Definition:
      Inorganic Carbon Content (percent of dry weight of sample)
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: real
      Missing Value Code:
       

      Attribute Name:
      Corg
      Attribute Label:
      Attribute Definition:
      Organic Carbon Content (percent of dry weight of sample)
      Storage Type:
      float
      Measurement Scale:
      Units: dimensionless
      Number Type: real
      Missing Value Code:
       

      Attribute Name:
      dbd
      Attribute Label:
      Attribute Definition:
      Dry Bulk Density (grams dry weight per centimeter cubed)
      Storage Type:
      float
      Measurement Scale:
      Units: gramPerCentimeterCubed
      Number Type: real
      Missing Value Code:
       


  • Methods
    Method Step

    Description
    For seagrass characteristics, 15cm diameter cores were collected at randomly chosen locations during low tide within each sampling site in triplicate. Seagrass biomass was separated from sediment using a coarse mesh bag. Seagrasses were separated by species and shoots were counted. Leaves were counted on each shoot, measured and scraped of any epiphytes. Aboveground and belowground components were separated and dried at 50C until a constant weight was achieved. Dry weight of above- and belowground components were recorded. The dried leaf samples were homogenized and ground to a fine powder using a motorized mortar and pestle. Powdered samples were analyzed for total carbon (C) and nitrogen (N) content using a CHN analyzer (Thermo Flash EA, 1112 series). Total phosphorus content was determined by a dry-oxidation, acid hydrolysis extraction followed by a colorimetric analysis of phosphate concentration of the extract. Homogenized leaf samples were additionally analyzed for δ13C using EA-IRMS techniques; high temperature catalytic combustion was used to combust the organic carbon to CO2, which was then measured on a Finnigan MAT Delta C IRMS in a continuous flow mode. Isotopic ratios (R) were reported in the standard delta notation (‰ ): δ (‰) = [(Rsample/Rstandard)-1]×1000. These results are presented with respect to the international standard Vienna Pee Dee Belemnite (V-PDB). Analytical reproducibility of the reported values, based on sample replicates, was better than ±0.08‰.
    Soil cores were collected at randomly selected locations within each site in duplicate by driving a manually operated piston core (6cm diameter) into the soil until 1m depth or the depth at which the piston core could no longer be inserted. A depth of one meter was chosen for straightforward comparison to existing soil carbon inventories and is not associated with a known period of accumulation. This method yielded samples of ~9 cm3 along the depth profile, while minimizing compaction. Sediment samples of a known wet volume were dried and weighed to calculate dry bulk density (g dry soil mL wet soil-1). Soil samples were homogenized using a motorized mortar and pestle then analyzed for Corg and Cinorg


  • 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.

  • Keywords
    seagrass, organic carbon, inorganic nutrients, soil carbon, soil, blue carbon, inorganic carbon, dry bulk density
  • Data Table and Format
    Data Table:  brazil_cores.csv

    Entity Name:
    brazil_cores.csv
    Entity Description:
    brazil_cores.csv
    Object Name:
    brazil_cores.csv
    Number of Header Lines:
    1
    Attribute Orientation:
    column
    Field Delimiter:
    ,
    Number of Records:
    300

    Data Table:  Fl_bay_cores.csv

    Entity Name:
    Fl_bay_cores.csv
    Entity Description:
    Fl_bay_cores.csv
    Object Name:
    Fl_bay_cores.csv
    Number of Header Lines:
    1
    Attribute Orientation:
    column
    Field Delimiter:
    ,
    Number of Records:
    82