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Dataset Title:	[Effect of lionfish in seagrass open area habitats] - Effect of lionfish presence on native fish abundance in open areas of seagrass habitat in Eleuthera, Bahamas during 2013 (Biodiversity Loss Effects Lionfish project) (Mechanisms and Consequences of Fish Biodiversity Loss on Atlantic Coral Reefs Caused by Invasive Pacific Lionfish)
Institution:	BCO-DMO   (Dataset ID: bcodmo_dataset_655420)
Information:	Summary | License | ISO 19115 | Metadata | Background | Subset | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum    or a List of Values	Maximum
year (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		2013
month (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		6	8
visit_number (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		1	8
day (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		1	30
reef (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"C08"	"CT-7C"
treatment (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"High"	"Low"
time_start (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"10:00"	"9:59"
time_end (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"10:23"	"17:18"
transect_number (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		1	2
transect_direction (degrees)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	350
transect_distance (meters)	!= =~ <= >= = < >		!= =~ <= >= = < >		5	33
habitat (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"AL"	"SPARSE_SG"
present (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"N"	"Y"
species (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"BOLU"	"unidentified_jawfish"
length_max_1 (count)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	5
length_max_2 (count)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	7
length_max_3 (count)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	5
length_max_4 (count)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	6
length_max_5 (count)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	6
length_max_6 (count)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	5
length_max_7 (count)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	3
length_max_8 (count)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	3
length_max_9 (count)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	2
length_max_10 (count)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	2
length_max_15 (count)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	2
notes (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"1"	"mystery fish"

 

Server-side Functions

distinct()

orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" year month visit_number day reef treatment time_start time_end transect_number transect_direction transect_distance habitat present species length_max_1 length_max_2 length_max_3 length_max_4 length_max_5 length_max_6 length_max_7 length_max_8 length_max_9 length_max_10 length_max_15 notes year month visit_number day reef treatment time_start time_end transect_number transect_direction transect_distance habitat present species length_max_1 length_max_2 length_max_3 length_max_4 length_max_5 length_max_6 length_max_7 length_max_8 length_max_9 length_max_10 length_max_15 notes year month visit_number day reef treatment time_start time_end transect_number transect_direction transect_distance habitat present species length_max_1 length_max_2 length_max_3 length_max_4 length_max_5 length_max_6 length_max_7 length_max_8 length_max_9 length_max_10 length_max_15 notes year month visit_number day reef treatment time_start time_end transect_number transect_direction transect_distance habitat present species length_max_1 length_max_2 length_max_3 length_max_4 length_max_5 length_max_6 length_max_7 length_max_8 length_max_9 length_max_10 length_max_15 notes year month visit_number day reef treatment time_start time_end transect_number transect_direction transect_distance habitat present species length_max_1 length_max_2 length_max_3 length_max_4 length_max_5 length_max_6 length_max_7 length_max_8 length_max_9 length_max_10 length_max_15 notes ")

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 {
  year {
    Int16 _FillValue 32767;
    Int16 actual_range 2013, 2013;
    String bcodmo_name "year";
    String description "Year of survey; YYYY";
    String long_name "Year";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/";
    String units "unitless";
  }
  month {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 6, 8;
    String bcodmo_name "month";
    String description "Month of survey; mm";
    String long_name "Month";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/MNTHXXXX/";
    String units "unitless";
  }
  visit_number {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 1, 8;
    String bcodmo_name "numb_obs";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String description "Visit number; one visit per reef per week";
    String long_name "Visit Number";
    String units "unitless";
  }
  day {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 1, 30;
    String bcodmo_name "day";
    String description "Day of survey; dd";
    String long_name "Day";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/DAYXXXXX/";
    String units "unitless";
  }
  reef {
    String bcodmo_name "site";
    String description "Name of main reef";
    String long_name "Reef";
    String units "unitless";
  }
  treatment {
    String bcodmo_name "treatment";
    String description "Low = low lionfish treatment (lionfish removed from main reefs); High = high lionfish treatment (lionfish maintained on main reefs)";
    String long_name "Treatment";
    String units "unitless";
  }
  time_start {
    String bcodmo_name "time_start";
    String description "Time that census began; HH:MM";
    String long_name "Time Start";
    String units "unitless";
  }
  time_end {
    String bcodmo_name "time_end";
    String description "Time that census ended; HH:MM";
    String long_name "Time End";
    String units "unitless";
  }
  transect_number {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 1, 2;
    String bcodmo_name "transect";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String description "Each transect around each main reef was assigned a unique number (1-2)";
    String long_name "Transect Number";
    String units "unitless";
  }
  transect_direction {
    Int16 _FillValue 32767;
    Int16 actual_range 0, 350;
    String bcodmo_name "transect";
    Float64 colorBarMaximum 360.0;
    Float64 colorBarMinimum 0.0;
    String description "Direction (0-360 degrees) away from main reef that transect was conducted";
    String long_name "Transect Direction";
    String units "degrees";
  }
  transect_distance {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 5, 33;
    String bcodmo_name "transect";
    String description "Distance of plot to main reef";
    String long_name "Transect Distance";
    String units "meters";
  }
  habitat {
    String bcodmo_name "site_descrip";
    String description "Type of habitat in plot; SAND = sand; SG = seagrass; AL = algae; GORG = gorgonians; SP = sparse";
    String long_name "Habitat";
    String units "unitless";
  }
  present {
    String bcodmo_name "site_descrip";
    String description "Y = Yes at least one native fish was present on Standardized Habitat Unit (SHU); N = No native fishes were present on SHU.";
    String long_name "Present";
    String units "unitless";
  }
  species {
    String bcodmo_name "species";
    String description "First 2 letters of genus and first 2 letters of species; see species key dataset for full species names.";
    String long_name "Species";
    String units "unitless";
  }
  length_max_1 {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 5;
    String bcodmo_name "fish_len";
    String description "Number of individuals that were between 0-1 cm total length";
    String long_name "Length Max 1";
    String units "count";
  }
  length_max_2 {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 7;
    String bcodmo_name "fish_len";
    String description "Number of individuals that were between 1.1-2 cm total length";
    String long_name "Length Max 2";
    String units "count";
  }
  length_max_3 {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 5;
    String bcodmo_name "fish_len";
    String description "Number of individuals that were between 2.1-3 cm total length";
    String long_name "Length Max 3";
    String units "count";
  }
  length_max_4 {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 6;
    String bcodmo_name "fish_len";
    String description "Number of individuals that were between 3.1-4 cm total length";
    String long_name "Length Max 4";
    String units "count";
  }
  length_max_5 {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 6;
    String bcodmo_name "fish_len";
    String description "Number of individuals that were between 4.1-5 cm total length";
    String long_name "Length Max 5";
    String units "count";
  }
  length_max_6 {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 5;
    String bcodmo_name "fish_len";
    String description "Number of individuals that were between 5.1-6 cm total length";
    String long_name "Length Max 6";
    String units "count";
  }
  length_max_7 {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 3;
    String bcodmo_name "fish_len";
    String description "Number of individuals that were between 6.1-7 cm total length";
    String long_name "Length Max 7";
    String units "count";
  }
  length_max_8 {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 3;
    String bcodmo_name "fish_len";
    String description "Number of individuals that were between 7.1-8 cm total length";
    String long_name "Length Max 8";
    String units "count";
  }
  length_max_9 {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 2;
    String bcodmo_name "fish_len";
    String description "Number of individuals that were between 8.1-9 cm total length";
    String long_name "Length Max 9";
    String units "count";
  }
  length_max_10 {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 2;
    String bcodmo_name "fish_len";
    String description "Number of individuals that were between 9.1-10 cm total length";
    String long_name "Length Max 10";
    String units "count";
  }
  length_max_15 {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 2;
    String bcodmo_name "fish_len";
    String description "Number of individuals that were between 10.1-15 cm total length";
    String long_name "Length Max 15";
    String units "count";
  }
  notes {
    String bcodmo_name "comment";
    String description "Notes on site observations";
    String long_name "Notes";
    String units "unitless";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv";
    String acquisition_description 
"This was a manipulative field experiment conducted during June \\u2013 August
2013 to determine whether lionfish affect native fishes in the areas
surrounding coral patch reefs.\\u00a0 Sixteen patch reefs were paired based on
similarity in location, size, benthic composition, initial fish community, and
surrounding habitat, then one reef in each pair was randomly assigned to
either low-lionfish or high-lionfish treatments.\\u00a0 A pair of divers
removed all lionfish from the eight low-lionfish reefs during weekly visits
(resulting mean lionfish density on low-lionfish reefs was 0.01 to 0.03
lionfish/square meter).\\u00a0 The eight remaining reefs were maintained as
high-lionfish treatment reefs, with divers adding lionfish to the reefs to
keep densities within the naturally occurring range observed in Rock Sound
(resulting mean lionfish density on high-lionfish reefs was 0.12 to 0.29
lionfish/square meter. \\u00a0
 
A pair of divers returned to each reef weekly for 7 weeks to census the native
fish communities on the main reefs and in three different habitat types in the
surrounding areas.\\u00a0 During all surveys, divers counted all fish less than
15 cm TL and all piscivores of any size.\\u00a0 Around each main reef, selected
between one and four satellite coral heads were haphazardly selected to
survey.\\u00a0 Satellite coral heads were small structures comprised of one to
several coral colonies, ranging in size from 0.31 to 4.7 meters squared and
located between 3.8 and 25.1 m from the main reefs.\\u00a0 In addition to being
smaller than the main reefs, satellite heads also supported neither resident
lionfish nor native piscivores.\\u00a0 To document native fish communities in
open sand and seagrass areas without any coral heads or other hard structures,
two 35 m transects were run outward from each main reef in randomly selected
directions.\\u00a0 Divers surveyed fish at 5-m intervals within 2 square meter
plots around the transect tapes.\\u00a0 To obtain a standardized measure of
fish communities at set distances from each reef that accounted for habitat
type, patch size, and initial fish community, I set-up small (0.5 meters
squared) identical standardized habitat units (SHUs) consisting of 9 empty
queen conch (Strombus gigas) shells with their apertures facing upward.\\u00a0
All reefs had one row of 4 SHUs located at 7-m intervals extending away from
the reef.\\u00a0 Half of the reefs (4 high-lionfish and 4 low-lionfish reefs)
also had a second row of 2 SHUs located at 15 m and 31 m from the reef and
extending outward in the opposite direction from the first row.\\u00a0 During
the final week of the experiment, in addition to visually surveying the fish
communities on the SHUs, a pair of divers placed all conch shells in dry bags
and brought them up to a boat. Each shell was shaken in a bucket of seawater
to remove and count any individuals hiding in the shells.
 
Note that five of the 16 main coral patch reefs had high abundances of small,
juvenile grunts (Haemulon spp.), which formed large schools of approximately
100 - 300 individuals above the reefs.\\u00a0 Counts of these juvenile grunts
are not considered to be precise or accurate. \\u00a0";
    String awards_0_award_nid "561016";
    String awards_0_award_number "OCE-1233027";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1233027";
    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 "David L. Garrison";
    String awards_0_program_manager_nid "50534";
    String cdm_data_type "Other";
    String comment 
"Seagrass Habitats - Open Areas 
   Lead PI: Mark Hixon 
   Sub-Project Lead: Casey Benkwitt 
   Version 12 August 2016 
 Species codes are first two letters of genus and species; See species key.";
    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 2.3  19 Dec 2019";
    String date_created "2016-08-23T16:12:45Z";
    String date_modified "2019-05-14T17:10:50Z";
    String defaultDataQuery "&time<now";
    String doi "10.1575/1912/bco-dmo.655420.1";
    String history 
"2024-11-08T06:02:55Z (local files)
2024-11-08T06:02:55Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_655420.html";
    String infoUrl "https://www.bco-dmo.org/dataset/655420";
    String institution "BCO-DMO";
    String keywords "bco, bco-dmo, biological, chemical, data, dataset, day, direction, distance, dmo, end, erddap, habitat, length, length_max_1, length_max_10, length_max_15, length_max_2, length_max_3, length_max_4, length_max_5, length_max_6, length_max_7, length_max_8, length_max_9, management, max, month, notes, number, oceanography, office, preliminary, present, reef, species, start, time, time_end, time_start, transect, transect_direction, transect_distance, transect_number, treatment, visit, visit_number, year";
    String license "https://www.bco-dmo.org/dataset/655420/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/655420";
    String param_mapping "{'655420': {}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/655420/parameters";
    String people_0_affiliation "University of Hawaii";
    String people_0_person_name "Mark Hixon";
    String people_0_person_nid "51647";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "Oregon State University";
    String people_1_affiliation_acronym "OSU";
    String people_1_person_name "Cassandra E. Benkwitt";
    String people_1_person_nid "51706";
    String people_1_role "Contact";
    String people_1_role_type "related";
    String people_2_affiliation "Woods Hole Oceanographic Institution";
    String people_2_affiliation_acronym "WHOI BCO-DMO";
    String people_2_person_name "Hannah Ake";
    String people_2_person_nid "650173";
    String people_2_role "BCO-DMO Data Manager";
    String people_2_role_type "related";
    String project "BiodiversityLossEffects_lionfish";
    String projects_0_acronym "BiodiversityLossEffects_lionfish";
    String projects_0_description 
"The Pacific red lionfish (Pterois volitans), a popular aquarium fish, was introduced to the Atlantic Ocean in the vicinity of Florida in the late 20th century. Voraciously consuming small native coral-reef fishes, including the juveniles of fisheries and ecologically important species, the invader has undergone a population explosion that now ranges from the U.S. southeastern seaboard to the Gulf of Mexico and across the greater Caribbean region. The PI's past research determined that invasive lionfish (1) have escaped their natural enemies in the Pacific (lionfish are much less abundant in their native range); (2) are not yet controlled by Atlantic predators, competitors, or parasites; (3) have strong negative effects on populations of native Atlantic fishes; and (4) locally reduce the diversity (number of species) of native fishes. The lionfish invasion has been recognized as one of the major conservation threats worldwide.
The Bahamas support the highest abundances of invasive lionfish globally. This system thus provides an unprecedented opportunity to understand the direct and indirect effects of a major invader on a diverse community, as well as the underlying causative mechanisms. The PI will focus on five related questions: (1) How does long-term predation by lionfish alter the structure of native reef-fish communities? (2) How does lionfish predation destabilize native prey population dynamics, possibly causing local extinctions? (3) Is there a lionfish-herbivore-seaweed trophic cascade on invaded reefs? (4) How do lionfish modify cleaning mutualisms on invaded reefs? (5) Are lionfish reaching densities where natural population limits are evident?";
    String projects_0_end_date "2016-07";
    String projects_0_geolocation "Three Bahamian sites: 24.8318, -076.3299;  23.8562, -076.2250; 23.7727, -076.1071; Caribbean Netherlands: 12.1599, -068.2820";
    String projects_0_name "Mechanisms and Consequences of Fish Biodiversity Loss on Atlantic Coral Reefs Caused by Invasive Pacific Lionfish";
    String projects_0_project_nid "561017";
    String projects_0_project_website "http://hixon.science.oregonstate.edu/content/highlight-lionfish-invasion";
    String projects_0_start_date "2012-08";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v55";
    String subsetVariables "year";
    String summary "Effect of lionfish presence on native fish abundance in open areas of seagrass habitat in Eleuthera, Bahamas during 2013 (Biodiversity Loss Effects Lionfish project)";
    String title "[Effect of lionfish in seagrass open area habitats] - Effect of lionfish presence on native fish abundance in open areas of seagrass habitat in Eleuthera, Bahamas during 2013 (Biodiversity Loss Effects Lionfish project) (Mechanisms and Consequences of Fish Biodiversity Loss on Atlantic Coral Reefs Caused by Invasive Pacific Lionfish)";
    String version "1";
    String xml_source "osprey2erddap.update_xml() v1.3";
  }
}

 

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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 Data Access Protocol (DAP) and its selection constraints.

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.

• (easy) You can get data by using the dataset's Data Access Form or Subset form. They make the URL for you.
• (easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
• (not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

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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