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Dataset Title:	[Mesopelagic decay experiments: Biochemical decay rates] - Biochemical decay rates from mesopelagic decay experiments with Thalassiosira weissflogii, Emiliania huxleyii, and Tetraselmis sp. (Collaborative Research: Transforming Carbon in the Deep Sea)
Institution:	BCO-DMO   (Dataset ID: bcodmo_dataset_995681_v1)
Information:	Summary | License | Metadata | Background | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum	Maximum
Experiment (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		2	3
Algal_substrate (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"Eh"	"Tw"
Carbon_pool (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"DOC"	"POC"
Interval (TBD)	!= =~ <= >= = < >		!= =~ <= >= = < >		1	2
Elapsed_days (days)	!= =~ <= >= = < >		!= =~ <= >= = < >		9	87
P_rate_flask1 (per day (d-1))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.001	0.185
P_rate_flask2 (per day (d-1))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.008	0.18
P_rate_flask3 (per day (d-1))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.002	0.208
L_rate_flask1 (per day (d-1))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.003	0.2
L_rate_flask2 (per day (d-1))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.001	0.252
L_rate_flask3 (per day (d-1))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.003	0.23
Poly_NA_rate_flask1 (per day (d-1))	!= =~ <= >= = < >		!= =~ <= >= = < >		6.539E-5	0.143
Poly_NA_rate_flask2 (per day (d-1))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.001	0.164
Poly_NA_rate_flask3 (per day (d-1))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.001	0.143
LMW_rate_flask1 (per day (d-1))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.005	0.146
LMW_rate_flask2 (per day (d-1))	!= =~ <= >= = < >		!= =~ <= >= = < >		4.719E-4	0.081
LMW_rate_flask3 (per day (d-1))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.011	0.118

 

Server-side Functions

distinct()

orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" Experiment Algal_substrate Carbon_pool Interval Elapsed_days P_rate_flask1 P_rate_flask2 P_rate_flask3 L_rate_flask1 L_rate_flask2 L_rate_flask3 Poly_NA_rate_flask1 Poly_NA_rate_flask2 Poly_NA_rate_flask3 LMW_rate_flask1 LMW_rate_flask2 LMW_rate_flask3 Experiment Algal_substrate Carbon_pool Interval Elapsed_days P_rate_flask1 P_rate_flask2 P_rate_flask3 L_rate_flask1 L_rate_flask2 L_rate_flask3 Poly_NA_rate_flask1 Poly_NA_rate_flask2 Poly_NA_rate_flask3 LMW_rate_flask1 LMW_rate_flask2 LMW_rate_flask3 Experiment Algal_substrate Carbon_pool Interval Elapsed_days P_rate_flask1 P_rate_flask2 P_rate_flask3 L_rate_flask1 L_rate_flask2 L_rate_flask3 Poly_NA_rate_flask1 Poly_NA_rate_flask2 Poly_NA_rate_flask3 LMW_rate_flask1 LMW_rate_flask2 LMW_rate_flask3 Experiment Algal_substrate Carbon_pool Interval Elapsed_days P_rate_flask1 P_rate_flask2 P_rate_flask3 L_rate_flask1 L_rate_flask2 L_rate_flask3 Poly_NA_rate_flask1 Poly_NA_rate_flask2 Poly_NA_rate_flask3 LMW_rate_flask1 LMW_rate_flask2 LMW_rate_flask3 Experiment Algal_substrate Carbon_pool Interval Elapsed_days P_rate_flask1 P_rate_flask2 P_rate_flask3 L_rate_flask1 L_rate_flask2 L_rate_flask3 Poly_NA_rate_flask1 Poly_NA_rate_flask2 Poly_NA_rate_flask3 LMW_rate_flask1 LMW_rate_flask2 LMW_rate_flask3 ")

File type: (more information) .asc - View OPeNDAP-style ISO-8859-1 comma-separated text. .csv - Download a ISO-8859-1 comma-separated text table (line 1: names; line 2: units; ISO 8601 times). .csvp - Download a ISO-8859-1 .csv file with line 1: name (units). Times are ISO 8601 strings. .csv0 - Download a ISO-8859-1 .csv file without column names or units. Times are ISO 8601 strings. .dataTable - A JSON file formatted for use with the Google Visualization client library (Google Charts). .das - View the dataset's metadata via an ISO-8859-1 OPeNDAP Dataset Attribute Structure (DAS). .dds - View the dataset's structure via an ISO-8859-1 OPeNDAP Dataset Descriptor Structure (DDS). .dods - OPeNDAP clients use this to download the data in the DODS binary format. .esriCsv - Download a ISO_8859_1 .csv file for ESRI's ArcGIS 9.x and below (separate date and time columns). .fgdc - View the dataset's UTF-8 FGDC .xml metadata. .geoJson - Download longitude,latitude,otherColumns data as a UTF-8 GeoJSON .json file. .graph - View a Make A Graph web page. .help - View a web page with a description of tabledap. .html - View an OPeNDAP-style HTML Data Access Form. .htmlTable - View a UTF-8 .html web page with the data in a table. Times are ISO 8601 strings. .iso19115 - View the dataset's ISO 19115-2/19139 UTF-8 .xml metadata. .itx - Download an ISO-8859-1 Igor Text File. Each response column becomes a wave. .json - View a table-like UTF-8 JSON file (missing value = 'null'; times are ISO 8601 strings). .jsonlCSV1 - View a UTF-8 JSON Lines CSV file with column names on line 1 (mv = 'null'; times are ISO 8601 strings). .jsonlCSV - View a UTF-8 JSON Lines CSV file without column names (mv = 'null'; times are ISO 8601 strings). .jsonlKVP - View a UTF-8 JSON Lines file with Key:Value pairs (missing value = 'null'; times are ISO 8601 strings). .mat - Download a MATLAB binary file. .nc - Download a flat, table-like, NetCDF-3 binary file with COARDS/CF/ACDD metadata. .ncHeader - View the UTF-8 header (the metadata) for the NetCDF-3 .nc file. .ncCF - Download a NetCDF-3 CF Discrete Sampling Geometries file (Contiguous Ragged Array). .ncCFHeader - View the UTF-8 header (the metadata) for the .ncCF file. .ncCFMA - Download a NetCDF-3 CF Discrete Sampling Geometries file (Multidimensional Array). .ncCFMAHeader - View the UTF-8 header (the metadata) for the .ncCFMA file. .nccsv - Download a NetCDF-3-like 7-bit ASCII NCCSV .csv file with COARDS/CF/ACDD metadata. .nccsvMetadata - View the dataset's metadata as the top half of a 7-bit ASCII NCCSV .csv file. .ncoJson - Download a UTF-8 NCO lvl=2 JSON file with COARDS/CF/ACDD metadata. .odvTxt - Download longitude,latitude,time,otherColumns as an ISO-8859-1 ODV Generic Spreadsheet File (.txt). .subset - View an HTML form which uses faceted search to simplify picking subsets of the data. .tsv - Download a ISO-8859-1 tab-separated text table (line 1: names; line 2: units; ISO 8601 times). .tsvp - Download a ISO-8859-1 .tsv file with line 1: name (units). Times are ISO 8601 strings. .tsv0 - Download a ISO-8859-1 .tsv file without column names or units. Times are ISO 8601 strings. .wav - Download a .wav audio file. All columns must be numeric and of the same type. .xhtml - View a UTF-8 XHTML (XML) file with the data in a table. Times are ISO 8601 strings. .kml - View a .kml file, suitable for Google Earth. .smallPdf - View a small .pdf image file with a graph or map. .pdf - View a standard, medium-sized .pdf image file with a graph or map. .largePdf - View a large .pdf image file with a graph or map. .smallPng - View a small .png image file with a graph or map. .png - View a standard, medium-sized .png image file with a graph or map. .largePng - View a large .png image file with a graph or map. .transparentPng - View a .png image file (just the data, without axes, landmask, or legend).

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Experiment {
    Int32 actual_range 2, 3;
    String long_name "Experiment";
    String units "unitless";
  }
  Algal_substrate {
    String long_name "Algal_substrate";
    String units "unitless";
  }
  Carbon_pool {
    String long_name "Carbon_pool";
    String units "unitless";
  }
  Interval {
    Int32 actual_range 1, 2;
    String long_name "Interval";
    String units "TBD";
  }
  Elapsed_days {
    Int32 actual_range 9, 87;
    String long_name "Elapsed_days";
    String units "days";
  }
  P_rate_flask1 {
    Float32 actual_range 0.001, 0.185;
    String long_name "P_rate_flask1";
    String units "per day (d-1)";
  }
  P_rate_flask2 {
    Float32 actual_range 0.008, 0.18;
    String long_name "P_rate_flask2";
    String units "per day (d-1)";
  }
  P_rate_flask3 {
    Float32 actual_range 0.002, 0.208;
    String long_name "P_rate_flask3";
    String units "per day (d-1)";
  }
  L_rate_flask1 {
    Float32 actual_range 0.003, 0.2;
    String long_name "L_rate_flask1";
    String units "per day (d-1)";
  }
  L_rate_flask2 {
    Float32 actual_range 0.001, 0.252;
    String long_name "L_rate_flask2";
    String units "per day (d-1)";
  }
  L_rate_flask3 {
    Float32 actual_range 0.003, 0.23;
    String long_name "L_rate_flask3";
    String units "per day (d-1)";
  }
  Poly_NA_rate_flask1 {
    Float32 actual_range 6.539e-5, 0.143;
    String long_name "Poly_na_rate_flask1";
    String units "per day (d-1)";
  }
  Poly_NA_rate_flask2 {
    Float32 actual_range 0.001, 0.164;
    String long_name "Poly_na_rate_flask2";
    String units "per day (d-1)";
  }
  Poly_NA_rate_flask3 {
    Float32 actual_range 0.001, 0.143;
    String long_name "Poly_na_rate_flask3";
    String units "per day (d-1)";
  }
  LMW_rate_flask1 {
    Float32 actual_range 0.005, 0.146;
    String long_name "Lmw_rate_flask1";
    String units "per day (d-1)";
  }
  LMW_rate_flask2 {
    Float32 actual_range 4.719e-4, 0.081;
    String long_name "Lmw_rate_flask2";
    String units "per day (d-1)";
  }
  LMW_rate_flask3 {
    Float32 actual_range 0.011, 0.118;
    String long_name "Lmw_rate_flask3";
    String units "per day (d-1)";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_url "https://www.bco-dmo.org/";
    String doi "10.26008/1912/bco-dmo.995681.1";
    String history 
"2026-09-18T06:56:09Z (local files)
2026-09-18T06:56:09Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_995681_v1.html";
    String infoUrl "https://osprey.bco-dmo.org/dataset/995681";
    String institution "BCO-DMO";
    String license 
"The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.";
    String sourceUrl "(local files)";
    String summary 
"The mesopelagic zone is a site of strong microbially driven particle attenuation with depth and thus plays a crucial role in controlling the transfer efficiency of the ocean's biological pump. However, little quantitative information exists on the dependency of decay processes on the source material. Here we followed the decay of 14C-labeled dead particulate carbon (POC) and dissolved organic carbon (DOC) from three different phytoplankton species, and two incubations of live diatoms, in mesopelagic water over three months. Commonly used first-order kinetics failed to adequately describe the decay of organic material as rate constants varied from day to day. Over extended periods, decay rates for organic material exhibited two distinct phases, with rates in the second phase being inversely related to rates in the first phase. Microbial biomass (measured via ATP and cell counts) increased substantially during phase 1 and ebbed during phase 2. Decay rates were significantly different among the three algal sources; however, differences were even more pronounced among carbon pools and followed a distinct pattern (combined average per-day decay rates at 12 degrees Celsius): fresh DOC (0.6) > fresh POC (0.1) > live cells (0.06) > aged DOC/POC (0.01). Separation of POC into four broad biochemical fractions showed that components in the operationally defined lipid fraction contained the most degradable compounds for fresh material. Our research highlights the need to include the dynamics of the most easily digestible fractions of freshly released organic material, and live plankton resilient to digestion, in calculations of vertical carbon flux budgets. 

This dataset reports decay rates for particulate organic carbon (POC) and its biochemical fractions including proteins, polysaccharides, lipids, and low molecular weight compounds from mesopelagic decay experiments using three 14C-labeled algae (Thalassiosira weissflogii, Tetraselmis sp., and Emiliania huxleyi). See the \"Related Datasets\" section for complementary datasets from the same experiments.";
    String title "[Mesopelagic decay experiments: Biochemical decay rates] - Biochemical decay rates from mesopelagic decay experiments with Thalassiosira weissflogii, Emiliania huxleyii, and Tetraselmis sp. (Collaborative Research: Transforming Carbon in the Deep Sea)";
  }
}

 

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