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Dataset Title:  Bulk sediment organic matter composition of three marsh ponds in PIE-
LTER (Rowley, MA) from 2014.
  RSS
Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_738169)
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Subset | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
   or a List of Values ?
   Maximum ?
 
 season (unitless) ?              
 Tide (Sea Surface Height, unitless) ?              
 Week (unitless) ?          1    11
 Pond (unitless) ?          1    3
 Type (unitless) ?      
   - +  ?
 TOC (percent) ?          7.08    19.5
 d13C (per mil) ?          -17.4    -14.4
 TN (percent) ?          0.73    1.93
 d15N (per mill) ?          0.0    2.8
 
Server-side Functions ?
 distinct() ?
? (" ")

File type: (more info)

(Documentation / Bypass this form ? )
 
(Please be patient. It may take a while to get the data.)


 

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  season {
    String description "Season at time of sampling";
    String ioos_category "Unknown";
    String long_name "Season";
    String units "unitless";
  }
  Tide {
    Float64 colorBarMaximum 2.0;
    Float64 colorBarMinimum -2.0;
    String description "Tide type";
    String ioos_category "Sea Level";
    String long_name "Sea Surface Height";
    String units "unitless";
  }
  Week {
    Byte _FillValue 127;
    Byte actual_range 1, 11;
    String description "Week number";
    String ioos_category "Unknown";
    String long_name "Week";
    String units "unitless";
  }
  Pond {
    Byte _FillValue 127;
    Byte actual_range 1, 3;
    String description "Site number";
    String ioos_category "Unknown";
    String long_name "Pond";
    String units "unitless";
  }
  Type {
    String description "Type of sample; sediment";
    String ioos_category "Unknown";
    String long_name "Type";
    String units "unitless";
  }
  TOC {
    Float32 _FillValue NaN;
    Float32 actual_range 7.08, 19.5;
    String description "Percent total organic carbon";
    String ioos_category "Unknown";
    String long_name "TOC";
    String units "percent";
  }
  d13C {
    Float32 _FillValue NaN;
    Float32 actual_range -17.4, -14.4;
    String description "d13C in per mil";
    String ioos_category "Unknown";
    String long_name "D13 C";
    String units "per mil";
  }
  TN {
    Float32 _FillValue NaN;
    Float32 actual_range 0.73, 1.93;
    String description "Percent total nitrogen";
    String ioos_category "Unknown";
    String long_name "TN";
    String units "percent";
  }
  d15N {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 2.8;
    String description "d15N in units of per mil";
    String ioos_category "Statistics";
    String long_name "D15 N";
    String units "per mill";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv";
    String acquisition_description 
"The three ponds are located in the high marsh (1.43-1.46 m above North
American Vertical Datum of 1988) of the Plum Island Ecosystems \\u2013 Long
Term Ecological Research (PIE-LTER) site. Surface sediments were collected
weekly for TOC, TN, \\u03b413C, and \\u03b415N (June 25-August 13 and November
11-25, 2014). Cores (5 cm diameter x 2 cm deep) were collected from three 1 m2
quadrats placed at random locations along two crisscrossing transects in each
pond. Sediments were combined in combusted glass vials to form composite
samples and stored (-80 \\u2103) until analysis. sediment samples were prepared
for elemental and isotopic analyses by drying to constant mass (60 \\u00b0C),
homogenizing with a Retsch Mixer Mill 200 (plants and sediments), and fuming
with hydrochloric (HCl) acid to remove carbonates (Hedges and Stern 1984).
Analyses were performed by the Stable Isotope Laboratory at the Marine
Biological Laboratory (Woods Hole, MA). Isotopic data are reported in the
conventional \\u03b4-notation in units of per mil (\\u2030).";
    String awards_0_award_nid "529582";
    String awards_0_award_number "OCE-1233678";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1233678";
    String awards_0_funder_name "NSF Division of Ocean Sciences";
    String awards_0_funding_acronym "NSF OCE";
    String awards_0_funding_source_nid "355";
    String awards_0_program_manager "Dr David  L. Garrison";
    String awards_0_program_manager_nid "50534";
    String cdm_data_type "Other";
    String comment 
"Bulk sediment organic matter composition 
  A. Spivak, PI 
  Version 5 June 2018";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_type "institution";
    String creator_url "https://www.bco-dmo.org/";
    String data_source "extract_data_as_tsv version 2.2d  13 Jun 2019";
    String date_created "2018-06-05T20:13:51Z";
    String date_modified "2018-07-17T18:35:41Z";
    String defaultDataQuery "&time";
    String doi "10.1575/1912/bco-dmo.738169.1";
    String history 
"2019-07-21T01:05:14Z (local files)
2019-07-21T01:05:14Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_738169.html";
    String infoUrl "https://www.bco-dmo.org/dataset/738169";
    String institution "BCO-DMO";
    String instruments_0_acronym "IR Mass Spec";
    String instruments_0_dataset_instrument_description "Extracted and analyzed concentrations";
    String instruments_0_dataset_instrument_nid "738176";
    String instruments_0_description "The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).";
    String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/LAB16/";
    String instruments_0_instrument_name "Isotope-ratio Mass Spectrometer";
    String instruments_0_instrument_nid "469";
    String instruments_0_supplied_name "Isotope mass spectrometer";
    String instruments_1_dataset_instrument_description "Used to collect sediment samples";
    String instruments_1_dataset_instrument_nid "738360";
    String instruments_1_description 
"Capable of being performed in numerous environments, push coring is just as it sounds. Push coring is simply pushing the core barrel (often an aluminum or polycarbonate tube) into the sediment by hand. A push core is useful in that it causes very little disturbance to the more delicate upper layers of a sub-aqueous sediment.

Description obtained from: http://web.whoi.edu/coastal-group/about/how-we-work/field-methods/coring/";
    String instruments_1_instrument_name "Push Corer";
    String instruments_1_instrument_nid "628287";
    String instruments_1_supplied_name "Corer";
    String keywords "bco, bco-dmo, biological, chemical, d13, d13C, d15, d15N, data, dataset, dmo, earth, Earth Science > Oceans > Sea Surface Topography > Sea Surface Height, erddap, height, level, management, ocean, oceanography, oceans, office, pond, preliminary, science, sea, sea level, sea_surface_height, season, statistics, surface, Tide, toc, topography, type, week";
    String keywords_vocabulary "GCMD Science Keywords";
    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 metadata_source "https://www.bco-dmo.org/api/dataset/738169";
    String param_mapping "{'738169': {}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/738169/parameters";
    String people_0_affiliation "Woods Hole Oceanographic Institution";
    String people_0_affiliation_acronym "WHOI";
    String people_0_person_name "Amanda Spivak";
    String people_0_person_nid "529580";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "Woods Hole Oceanographic Institution";
    String people_1_affiliation_acronym "WHOI BCO-DMO";
    String people_1_person_name "Hannah Ake";
    String people_1_person_nid "650173";
    String people_1_role "BCO-DMO Data Manager";
    String people_1_role_type "related";
    String project "Eutrophication Effects on Sediment Metabolism and Benthic Algal-bacterial Coupling: An Application of Novel Techniques in a LTER Estuary";
    String projects_0_acronym "benthic_PP_at_TIDE";
    String projects_0_description 
"Extracted from the NSF award abstract:
This project will address how rates of benthic microalgal production respond to eutrophication and geomorphological changes in human-impacted tidal creeks. Excess nutrient loading increases benthic algal biomass and likely stimulates production rates but the magnitude of nutrient and geomorphological effects on rates of production is unknown. Will changes in benthic algal productivity affect algal-bacterial coupling? Furthermore, how is algal-bacterial coupling affected by geomorphological changes, which may be exacerbated by excess nutrient loading but can also occur in pristine marshes?
This project will take advantage of the infrastructure of the TIDE project, a long-term saltmarsh eutrophication experiment at the Plum Island Ecosystem - Long Term Ecological Research site in Northeastern Massachusetts. Specifically, the PIs will measure benthic metabolism and examine algal- bacterial coupling in fertilized and ambient nutrient tidal creeks in the first field season. The following field season, they will compare sediment metabolism and carbon dynamics on slumped tidal creek walls (i.e. areas where low marsh has collapsed into the tidal creek) to that on the bottom of tidal creeks. In both years, gross and net production will be determined using an innovative triple oxygen isotope technique and traditional dissolved oxygen and inorganic carbon flux measurements. Comparisons between these methods will be useful in informing studies of sediment metabolism. Lipid biomarkers will be used to characterize the sources of organic matter to creek sediments, and stable isotope analysis of bacterial specific biomarkers to identify the sources of organic carbon utilized by sediment bacteria. The biomarkers will reveal whether sediment bacteria use organic matter substrates, such as benthic microalgal carbon, selectively or in proportion to availability. Overall, results from the proposed study will provide important information about how sediment carbon dynamics in shallow tidal creeks respond to long term eutrophication. Furthermore, findings will enhance understanding of the role of tidal creeks in coastal biogeochemistry.";
    String projects_0_end_date "2015-08";
    String projects_0_geolocation "Plum Island Estuary, Rowley Massachusetts";
    String projects_0_name "Eutrophication Effects on Sediment Metabolism and Benthic Algal-bacterial Coupling: An Application of Novel Techniques in a LTER Estuary";
    String projects_0_project_nid "529583";
    String projects_0_start_date "2012-09";
    String publisher_name "Hannah Ake";
    String publisher_role "BCO-DMO Data Manager(s)";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v29";
    String subsetVariables "Type";
    String summary "Bulk sediment organic matter composition of three high marsh ponds within PIE-LTER. Data were collected over 11 weeks in the summer and fall of 2014.";
    String title "Bulk sediment organic matter composition of three marsh ponds in PIE-LTER (Rowley, MA) from 2014.";
    String version "1";
    String xml_source "osprey2erddap.update_xml() v1.5-beta";
  }
}

 

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its selection constraints (external link).

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.


 
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