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Dataset Title:	[Target site benthic survey vegetation - 2014] - Kelp forest community structure studied with respect to Clathromorphum bioerosion at central and western Aleutian Islands, Alaska from visual surveys, July 2014 (Ocean Acidification: Century Scale Impacts to Ecosystem Structure and Function of Aleutian Kelp Forests)
Institution:	BCO-DMO   (Dataset ID: bcodmo_dataset_755265)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum	Maximum
island (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"Adak"	"Tanaga"
site_name (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"Bat Island"	"Yippee Shoals"
latitude (degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		51.41001	52.9306
longitude (degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-178.68897	179.30471
depth_feet (Depth, feet)	!= =~ <= >= = < >		!= =~ <= >= = < >		16.0	40.0
habitat_type (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"Barren"	"Shallow kelp"
time (Date, UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2014-07-04	2014-07-21
observer (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"Kenner"	"Weitzman"
replicate (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		1	20
Eualaria_fistulosa_density (count per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	11
Laminaria_spp_density (count per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	35
Laminaria_yezoensis_density (count per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	0
Laminaria_longipes_density (count per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	4
Agarum_clathratum_density (count per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	12
Thalassiophyllum_clathrus_density (count per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	20
Cymathaere_triplicata_density (count per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	0
filamentous_red_algae_cover_score (percent cover per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	6
suspension_feeder_cover_score (percent cover per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	5
Desmarestia_spp_cover_score (percent cover per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	6
Codium_spp_cover_score (percent cover per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	6
crustose_coralline_algae_cover_score (percent cover per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	6
erect_calcified_algae_cover_score (percent cover per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	3
shell_cover_score (percent cover per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	6
sand_cover_score (percent cover per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	4
rock_cover_score (percent cover per 0.25 m^2)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	3

 

Server-side Functions

distinct()

orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" island site_name latitude longitude depth_feet habitat_type time observer replicate Eualaria_fistulosa_density Laminaria_spp_density Laminaria_yezoensis_density Laminaria_longipes_density Agarum_clathratum_density Thalassiophyllum_clathrus_density Cymathaere_triplicata_density filamentous_red_algae_cover_score suspension_feeder_cover_score Desmarestia_spp_cover_score Codium_spp_cover_score crustose_coralline_algae_cover_score erect_calcified_algae_cover_score shell_cover_score sand_cover_score rock_cover_score island site_name latitude longitude depth_feet habitat_type time observer replicate Eualaria_fistulosa_density Laminaria_spp_density Laminaria_yezoensis_density Laminaria_longipes_density Agarum_clathratum_density Thalassiophyllum_clathrus_density Cymathaere_triplicata_density filamentous_red_algae_cover_score suspension_feeder_cover_score Desmarestia_spp_cover_score Codium_spp_cover_score crustose_coralline_algae_cover_score erect_calcified_algae_cover_score shell_cover_score sand_cover_score rock_cover_score island site_name latitude longitude depth_feet habitat_type time observer replicate Eualaria_fistulosa_density Laminaria_spp_density Laminaria_yezoensis_density Laminaria_longipes_density Agarum_clathratum_density Thalassiophyllum_clathrus_density Cymathaere_triplicata_density filamentous_red_algae_cover_score suspension_feeder_cover_score Desmarestia_spp_cover_score Codium_spp_cover_score crustose_coralline_algae_cover_score erect_calcified_algae_cover_score shell_cover_score sand_cover_score rock_cover_score island site_name latitude longitude depth_feet habitat_type time observer replicate Eualaria_fistulosa_density Laminaria_spp_density Laminaria_yezoensis_density Laminaria_longipes_density Agarum_clathratum_density Thalassiophyllum_clathrus_density Cymathaere_triplicata_density filamentous_red_algae_cover_score suspension_feeder_cover_score Desmarestia_spp_cover_score Codium_spp_cover_score crustose_coralline_algae_cover_score erect_calcified_algae_cover_score shell_cover_score sand_cover_score rock_cover_score island site_name latitude longitude depth_feet habitat_type time observer replicate Eualaria_fistulosa_density Laminaria_spp_density Laminaria_yezoensis_density Laminaria_longipes_density Agarum_clathratum_density Thalassiophyllum_clathrus_density Cymathaere_triplicata_density filamentous_red_algae_cover_score suspension_feeder_cover_score Desmarestia_spp_cover_score Codium_spp_cover_score crustose_coralline_algae_cover_score erect_calcified_algae_cover_score shell_cover_score sand_cover_score rock_cover_score ")

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  island {
    String bcodmo_name "site";
    String description "name of island";
    String long_name "Island";
    String units "unitless";
  }
  site_name {
    String bcodmo_name "site";
    String description "identity of site";
    String long_name "Site Name";
    String units "unitless";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range 51.41001, 52.9306;
    String axis "Y";
    String bcodmo_name "latitude";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "latitude of study site";
    String ioos_category "Location";
    String long_name "Latitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LATX/";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range -178.68897, 179.30471;
    String axis "X";
    String bcodmo_name "longitude";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "longitude of study site";
    String ioos_category "Location";
    String long_name "Longitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
    String standard_name "longitude";
    String units "degrees_east";
  }
  depth_feet {
    Float64 _FillValue NaN;
    Float64 actual_range 16.0, 40.0;
    String bcodmo_name "depth";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String description "depth of benthic survey";
    String long_name "Depth";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/DEPH/";
    String standard_name "depth";
    String units "feet";
  }
  habitat_type {
    String bcodmo_name "site_descrip";
    String description "phase state of habitat: see Description";
    String long_name "Habitat Type";
    String units "unitless";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.404432e+9, 1.4059008e+9;
    String axis "T";
    String bcodmo_name "date";
    String description "calendar date of survey formatted as yyyy-mm-dd";
    String ioos_category "Time";
    String long_name "Date";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/";
    String source_name "date";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  observer {
    String bcodmo_name "person";
    String description "last name of observer";
    String long_name "Observer";
    String units "unitless";
  }
  replicate {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 1, 20;
    String bcodmo_name "replicate";
    String description "replicate 0.25-m^2 quadrat identifier";
    String long_name "Replicate";
    String units "unitless";
  }
  Eualaria_fistulosa_density {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 11;
    String bcodmo_name "abundance";
    String description "Number of Eualaria_fistulosa found in quadrat";
    String long_name "Eualaria Fistulosa Density";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "count per 0.25 m^2";
  }
  Laminaria_spp_density {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 35;
    String bcodmo_name "abundance";
    String description "Number of Laminaria_spp";
    String long_name "Laminaria Spp Density";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "count per 0.25 m^2";
  }
  Laminaria_yezoensis_density {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 0;
    String bcodmo_name "abundance";
    String description "Number of Laminaria_yezoensis found in quadrat";
    String long_name "Laminaria Yezoensis Density";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "count per 0.25 m^2";
  }
  Laminaria_longipes_density {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 4;
    String bcodmo_name "abundance";
    String description "Number of Laminaria_longipes found in quadrat";
    String long_name "Laminaria Longipes Density";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "count per 0.25 m^2";
  }
  Agarum_clathratum_density {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 12;
    String bcodmo_name "abundance";
    String description "Number of Agarum_clathratum found in quadrat";
    String long_name "Agarum Clathratum Density";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "count per 0.25 m^2";
  }
  Thalassiophyllum_clathrus_density {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 20;
    String bcodmo_name "abundance";
    String description "Number of Thalassiophyllum_clathrus found in quadrat";
    String long_name "Thalassiophyllum Clathrus Density";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "count per 0.25 m^2";
  }
  Cymathaere_triplicata_density {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 0;
    String bcodmo_name "abundance";
    String description "Number of Cymathaere_triplicata found in quadrat";
    String long_name "Cymathaere Triplicata Density";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "count per 0.25 m^2";
  }
  filamentous_red_algae_cover_score {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 6;
    String bcodmo_name "cover_pcent";
    String description "Percent cover of filamentous red algae";
    String long_name "Filamentous Red Algae Cover Score";
    String units "percent cover per 0.25 m^2";
  }
  suspension_feeder_cover_score {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 5;
    String bcodmo_name "cover_pcent";
    String description "Percent cover of suspension feeder found in quadrat";
    String long_name "Suspension Feeder Cover Score";
    String units "percent cover per 0.25 m^2";
  }
  Desmarestia_spp_cover_score {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 6;
    String bcodmo_name "cover_pcent";
    String description "Percent cover of Desmarestia spp. found in quadrat";
    String long_name "Desmarestia Spp Cover Score";
    String units "percent cover per 0.25 m^2";
  }
  Codium_spp_cover_score {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 6;
    String bcodmo_name "cover_pcent";
    String description "Percent cover of Codium spp. found in quadrat";
    String long_name "Codium Spp Cover Score";
    String units "percent cover per 0.25 m^2";
  }
  crustose_coralline_algae_cover_score {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 6;
    String bcodmo_name "cover_pcent";
    String description "Percent cover of crustose coralline algae found in quadrat";
    String long_name "Crustose Coralline Algae Cover Score";
    String units "percent cover per 0.25 m^2";
  }
  erect_calcified_algae_cover_score {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 3;
    String bcodmo_name "cover_pcent";
    String description "Percent cover of erect calcified algae found in quadrat";
    String long_name "Erect Calcified Algae Cover Score";
    String units "percent cover per 0.25 m^2";
  }
  shell_cover_score {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 6;
    String bcodmo_name "cover_pcent";
    String description "Percent cover ofshell found in quadrat";
    String long_name "Shell Cover Score";
    String units "percent cover per 0.25 m^2";
  }
  sand_cover_score {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 4;
    String bcodmo_name "cover_pcent";
    String description "Percent cover of sand found in quadrat";
    String long_name "Sand Cover Score";
    String units "percent cover per 0.25 m^2";
  }
  rock_cover_score {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 3;
    String bcodmo_name "cover_pcent";
    String description "Percent cover of rock found in quadrat";
    String long_name "Rock Cover Score";
    String units "percent cover per 0.25 m^2";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson,.odvTxt";
    String acquisition_description 
"Prior to examining Clathromorphum nereostratum bioerosion at each focal study
site, we characterized the ecological status of the site by quantifying the
abundance of its benthic constituents (i.e., kelps, understory algae,
coralline algae, etc.) using the same methods that have been employed by us
and others over the past 30 years (Estes et al. 2010). We characterized two
types of sites: (1) those that have long persisted as urchin barrens
(\\u201chabitat.type\\u201d = \\u201cBarren\\u201d) and (2) urchin barrens that
are situated immediately adjacent to shallow, remnant kelp stands, and thereby
receive urchin food subsidies (\\u201chabitat.type\\u201d = \\u201cBarren + kelp
subsidy\\u201d). At these latter sites, we also surveyed the adjacent kelp
stand (\\u201chabitat.type\\u201d = \\u201cShallow kelp\\u201d).
 
At each site, a diver sampled twenty 0.25-m^2 quadrats at the target depth
(21-37 feet) and along its contour, taking a random number of kicks between
quadrats. Patches of unconsolidated substrate were rare on the rocky reef;
however, if one was encountered while sampling, the diver took an additional
random number of kicks and again deployed the quadrat. In each quadrat, s/he
counted the stipe density of all kelps (by species) and estimated the
abundance (percent cover) of fleshy red algae, sessile invertebrates,
encrusting coralline algae (almost exclusively C. nereostratum), branching
coralline algae, and other algae such as Desmarestia or Codium species.
Percent cover was visually estimated on a scale of 1-6, where 1 = 0-5%, 2 =
6-25%, 3 = 26-50%, 4 = 51-75%, 5 = 76-95%, and 6 = 96-100 % cover.\\u00a0";
    String awards_0_award_nid "526658";
    String awards_0_award_number "PLR-1316141";
    String awards_0_data_url "http://nsf.gov/awardsearch/showAward?AWD_ID=1316141";
    String awards_0_funder_name "NSF Arctic Sciences";
    String awards_0_funding_acronym "NSF ARC";
    String awards_0_funding_source_nid "390";
    String awards_0_program_manager "Henrietta N Edmonds";
    String awards_0_program_manager_nid "51517";
    String cdm_data_type "Other";
    String comment 
"target_site_benthic_survey_vegetation_2014 
   Aleutian Islands, AK, July 2014 
   PI's: R. Steneck (UME), J. Estes (UCSCD) 
   version: 2019-01-30";
    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 "2019-02-07T14:51:06Z";
    String date_modified "2019-07-10T13:51:14Z";
    String defaultDataQuery "&time<now";
    String doi "10.1575/1912/bco-dmo.755265.1";
    Float64 Easternmost_Easting 179.30471;
    Float64 geospatial_lat_max 52.9306;
    Float64 geospatial_lat_min 51.41001;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.30471;
    Float64 geospatial_lon_min -178.68897;
    String geospatial_lon_units "degrees_east";
    String history 
"2024-11-23T17:06:16Z (local files)
2024-11-23T17:06:16Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_755265.html";
    String infoUrl "https://www.bco-dmo.org/dataset/755265";
    String institution "BCO-DMO";
    String keywords "agarum, Agarum_clathratum_density, algae, bco, bco-dmo, biological, calcified, chemical, clathratum, clathrus, codium, Codium_spp_cover_score, coralline, cover, crustose, crustose_coralline_algae_cover_score, cymathaere, Cymathaere_triplicata_density, data, dataset, date, density, depth, depth_feet, desmarestia, Desmarestia_spp_cover_score, dmo, erddap, erect, erect_calcified_algae_cover_score, eualaria, Eualaria_fistulosa_density, feeder, filamentous, filamentous_red_algae_cover_score, fistulosa, habitat, habitat_type, island, laminaria, Laminaria_longipes_density, Laminaria_spp_density, Laminaria_yezoensis_density, latitude, longipes, longitude, management, name, observer, oceanography, office, preliminary, red, replicate, rock, rock_cover_score, sand, sand_cover_score, score, shell, shell_cover_score, site, site_name, spp, suspension, suspension_feeder_cover_score, thalassiophyllum, Thalassiophyllum_clathrus_density, time, triplicata, type, yezoensis";
    String license "https://www.bco-dmo.org/dataset/755265/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/755265";
    Float64 Northernmost_Northing 52.9306;
    String param_mapping "{'755265': {'date': 'flag - time', 'depth_feet': 'flag - depth', 'longitude': 'flag - longitude', 'latitude': 'flag - latitude'}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/755265/parameters";
    String people_0_affiliation "University of Maine";
    String people_0_affiliation_acronym "U Maine DMC";
    String people_0_person_name "Robert  S. Steneck";
    String people_0_person_nid "526659";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "University of California-Santa Cruz";
    String people_1_affiliation_acronym "UC Santa Cruz";
    String people_1_person_name "James Estes";
    String people_1_person_nid "51389";
    String people_1_role "Co-Principal Investigator";
    String people_1_role_type "originator";
    String people_2_affiliation "Bigelow Laboratory for Ocean Sciences";
    String people_2_person_name "Douglas B. Rasher";
    String people_2_person_nid "480721";
    String people_2_role "Co-Principal Investigator";
    String people_2_role_type "originator";
    String people_3_affiliation "Woods Hole Oceanographic Institution";
    String people_3_affiliation_acronym "WHOI BCO-DMO";
    String people_3_person_name "Nancy Copley";
    String people_3_person_nid "50396";
    String people_3_role "BCO-DMO Data Manager";
    String people_3_role_type "related";
    String project "OA Kelp Forest Function";
    String projects_0_acronym "OA Kelp Forest Function";
    String projects_0_description 
"Extracted from the NSF award abstract:
Marine calcifying organisms are most at risk to rapid ocean acidification (OA) in cold-water ecosystems. The investigators propose to determine if a globally unique and widespread calcareous alga in Alaska's Aleutian archipelago, Clathromorphum nereostratum, is threatened with extinction due to the combined effects of OA and food web alterations. C. nereostratum is a slow growing coralline alga that can live to at least 2000 years. It accretes massive 'bioherms' that dominate the regions' rocky substrate both under kelp forests and deforested sea urchin barrens. It develops growth bands (similar to tree rings) in its calcareous skeleton, which effectively record its annual calcification rate over centuries. Pilot data suggest the skeletal density of C. nereostratum began to decline precipitously in the 1990's in some parts of the Aleutian archipelago. The investigators now propose to use high-resolution microscopy and microCT imaging to examine how the growth and skeletal density of C. nereostratum has changed in the past 300 years (i.e., since the industrial revolution) across the western Aleutians. They will compare their records of algal skeletal densities and their variation through time with reconstructions of past climate to infer causes of change. In addition, the investigators will examine whether the alga's defense against grazing by sea urchins is compromised by ongoing ocean acidification. The investigators will survey the extent of C. nereostratum bioerosion occurring at 10 sites spanning the western Aleutians, both inside and outside of kelp forests. At each site they will compare these patterns to observed and monitored ecosystem trophic structure and recent C. nereostratum calcification rates. Field observations will be combined with laboratory experiments to determine if it is a decline in the alga's skeletal density (due to recent OA and warming), an increase in grazing intensity (due to recent trophic-level dysfunction), or their interactive effects that are likely responsible for bioerosion patterns inside vs. outside of forests. By sampling C. nereostratum inside and outside of forests, they will determine if kelp forests locally increase pH via photosynthesis, and thus buffer the effects of OA on coralline calcification. The combination of field observations with laboratory controlled experiments, manipulating CO2 and temperature, will help elucidate drivers of calcification and project how these species interactions will likely change in the near future. The project will provide the first in situ example of how ongoing ocean acidification is affecting the physiology of long-lived, carbonate producing organisms in the subarctic North Pacific. It will also be one of the first studies to document whether OA, ocean warming, and food web changes to ecological processes are interacting in complex ways to reshape the outcome of species interactions in nature.";
    String projects_0_end_date "2016-08";
    String projects_0_name "Ocean Acidification:  Century Scale Impacts to Ecosystem Structure and Function of Aleutian Kelp Forests";
    String projects_0_project_nid "526660";
    String projects_0_start_date "2013-09";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 51.41001;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Kelp forest community structure studied with respect to Clathromorphum bioerosion at central and western Aleutian Islands, Alaska from visual surveys, July 2014. Estimates were derived from visual surveys, performed via SCUBA.";
    String time_coverage_end "2014-07-21";
    String time_coverage_start "2014-07-04";
    String title "[Target site benthic survey vegetation - 2014] - Kelp forest community structure studied with respect to Clathromorphum bioerosion at central and western Aleutian Islands, Alaska from visual surveys, July 2014 (Ocean Acidification:  Century Scale Impacts to Ecosystem Structure and Function of Aleutian Kelp Forests)";
    String version "1";
    Float64 Westernmost_Easting -178.68897;
    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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