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Dataset Title:  Octocoral colony heights measured during transect surveys at four sites on the
south shore of St. John, US Virgin Islands in June-August 2018.
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_765328)
Range: longitude = -64.7299 to -64.7104°E, latitude = 18.3029 to 18.3167°N
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Subset | Data Access Form | Files
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Site {
    String bcodmo_name "site";
    String description 
"Census locations as follows:
Booby Rock: 18° 18.176' N; 064° 42.626' W; 
E Cabritte = East Cabritte: 18° 18.551 ' N: 0.64° 43.129' W; 
Europa: 18° 19.003' N; 064° 43.796' W; 
Tektite: 18° 18.775' N; 064° 43.796' W; 
Yawzi: 18.3153; -64.7257";
    String long_name "Site";
    String units "unitless";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range 18.3029, 18.3167;
    String axis "Y";
    String bcodmo_name "latitude";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "Latitude; north is positive";
    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 -64.7299, -64.7104;
    String axis "X";
    String bcodmo_name "longitude";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "Longitude; east is positive";
    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";
  }
  Census_Year {
    Int16 _FillValue 32767;
    Int16 actual_range 2018, 2018;
    String bcodmo_name "year";
    String description "Year of census data collection.";
    String long_name "Census Year";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/";
    String units "unitless";
  }
  Transect_Position {
    Byte _FillValue 127;
    Byte actual_range 0, 50;
    String bcodmo_name "transect";
    String description "Transects positioned in a marked 50x10m area with stainless steel eyebolts marking each corner; and each of the 6 transects. Transects were 10m long across the 50x10m area. So there were 0m; 10m; 20m; 30m; 40m; 50m.";
    String long_name "Transect Position";
    String units "unitless";
  }
  Genus_Species {
    String bcodmo_name "species_epithet";
    String description "Taxonomic genus and species binomial of octocoral. 'nd' indicates no corals present in quadrat.";
    String long_name "Genus Species";
    String units "unitless";
  }
  Species_code {
    String bcodmo_name "taxon_code";
    String description "Octocorals species acronym. See the Species codes dataset. 'nd' indicates no corals present in quadrat.";
    String long_name "Species Code";
    String units "unitless";
  }
  Date {
    String bcodmo_name "date_local";
    String description "Date on which data were collected; formatted as yyyy-mm-dd";
    String long_name "Date";
    String source_name "Date";
    String time_precision "1970-01-01";
    String units "unitless";
  }
  Side_of_transect {
    String bcodmo_name "unknown";
    String description "Side of the transect tape (Left or Right); orientation looking towards open ocean with the nearest shore to the back.";
    String long_name "Side Of Transect";
    String units "unitless";
  }
  Meter_on_transect {
    Byte _FillValue 127;
    Byte actual_range 0, 9;
    String bcodmo_name "unknown";
    String description "From 0 to 9 meters.  1x1 meter quadrats were positioned randomly along the 10 m transect. The values refer to the position of the \"shoreward\" corner of the quadrat.  Thus \"0\"refers to the quadrat placed between the 0 and 1 meter marks.";
    String long_name "Meter On Transect";
    String units "meters";
  }
  Genus {
    String bcodmo_name "genus";
    String description "Taxonomic genus of octocoral. 'nd' indicates no corals present in quadrat.";
    String long_name "Genus";
    String units "unitless";
  }
  Height_of_living_tissue_cm {
    Byte _FillValue 127;
    Byte actual_range 1, 115;
    String bcodmo_name "height";
    String description "Maximum distance from the base of the octocoral colony until the farthest tips of the branch (i.e. not necessarily perpendicular to the substrate). All measures rounded to the nearest centimeter with the exception of 5 cm which only includes colonies >= 5 cm. Starting in 2016 measures less than 5 cm reflect colonies with thick branches which could only have";
    String long_name "Height Of Living Tissue Cm";
    String units "centimeters";
  }
  Total_height {
    Byte _FillValue 127;
    Byte actual_range 6, 82;
    String bcodmo_name "height";
    String description "Total height of octocoral colony including non-living portion; measured from the base to the tip including dead tissue. (Only colonies with some living tissue were measured).";
    String long_name "Total Height";
    String units "centimeters";
  }
  Basal_damage {
    Byte _FillValue 127;
    Byte actual_range 1, 56;
    String bcodmo_name "unknown";
    String description "Height measured from the base to the living tissue.";
    String long_name "Basal Damage";
    String units "centimeters";
  }
  Damage {
    Byte _FillValue 127;
    Byte actual_range 0, 4;
    String bcodmo_name "unknown";
    String description "Damage code: 0 when there was no damage or only a few small cm scale areas of damage making up  5% but < 25% of the colony have injuries;Damage = 2 when injuries are in > 25% but < 50% of the colony; Damage = 3 when in juries are > 50% of the colony but < 75%; and Damage = 4 when a colony has injuries in > 75% of the colony. No data was recorded in Damage column at Tektite in 2018.";
    String long_name "Damage";
    String units "unitless";
  }
  Comments_1 {
    String bcodmo_name "comment";
    String description "Comments about the data: '# C. gibbosum' refers to the number of Cyphoma gibbosum found on the colony; 'aa2' indicates the colony is similar to A. americana but most likely belongs to an as of yet undescribed Antillogorgia species;  'pp2' indicates the colony is similar to Pseudoplexaura porosa but the identification is uncertain; Millepora indicates overgrowth of part of the colony by Millepora.";
    String long_name "Comments 1";
    String units "unitless";
  }
  Comments_2_sample_tag {
    String bcodmo_name "sample";
    String description "Sample Numbers for octocorals that were sampled in order to get IDs based on sclerites.";
    String long_name "Comments 2 Sample Tag";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/ACYC/";
    String units "unitless";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson";
    String acquisition_description 
"Survey design:
 
All sites were located at 6 to 9 meters depth.
 
Censuses at East Cabritte, Europa and Tektite were based on 50x10m areas that
were arbitrarily selected and permanently marked with stainless steel eyebolts
at the corners of the sites. A total of six transect lines, also marked with
eyebolts, were laid out at 10 m intervals. All octocorals present in 1 x 1 m
quadrats along the 10-meter long transects were scored. In 2014 ten quadrats
were surveyed along each line. In 2015 and 2016 ten quadrats were scored along
each transect line at Europa and Tektite and five randomly chosen quadrats
were surveyed at East Cabritte. The transect identifier \\\"transect_pos\\\" has
values 0, 10, 20, 30, 40 or 50 which represent position& in meters within the
50x10 survey area corresponding to each of the 6 transects (e.g. 20 = 20m).
 
The census at Booby Rock was conducted in a single day in which transects were
randomly placed along a 50 m line that was arbitrarily placed on a constant
depth contour. Only 4 1x1 m quadrats were surveyed along each transect. The
transect identifier (transect_pos) for transects at Booby Rock refers to
position along the 50 m line.
 
Yawzi and Deep Tektite surveys: 20 quadrats at each transect (3 transects)
 
Sampling methods:
 
Identifications were based on traits visible in the field, and samples of
representative colonies were collected for further analysis in cases in which
field identification was uncertain. Sclerites from those samples were examined
for species identification.
 
Two height measures are present, height of living tissue, which only includes
that part of the axis with living tissue and total height which is the
distance from the base to the tip of the farthest branch from the base (i.e.
not necessarily perpendicular to the substrate), regardless of whether the
tips or base had living tissue. (Only colonies with some living tissue were
measured). All measures rounded to the nearest cm with the exception of 5 cm
which only includes colonies >= 5 cm. Starting in 2016, measures less than 5
cm reflect colonies with thick branches which could only have <5 cm heights
due to partial mortality.";
    String awards_0_award_nid "752512";
    String awards_0_award_number "OCE-1756381";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1756381";
    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 
"Octocoral species surveys: adults 
    Octocoral colony heights measured during transect surveys at four sites on the south shore of St. John, US Virgin Islands in June-August 2018.  
   H. Lasker (U. Buffalo) 
   version: 2019-09-23";
    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 "2019-04-18T20:40:43Z";
    String date_modified "2020-02-12T17:29:31Z";
    String defaultDataQuery "&amp;time&lt;now";
    String doi "10.1575/1912/bco-dmo.765328.1";
    Float64 Easternmost_Easting -64.7104;
    Float64 geospatial_lat_max 18.3167;
    Float64 geospatial_lat_min 18.3029;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -64.7104;
    Float64 geospatial_lon_min -64.7299;
    String geospatial_lon_units "degrees_east";
    String history 
"2022-10-01T15:14:07Z (local files)
2022-10-01T15:14:07Z https://erddap.bco-dmo.org/tabledap/bcodmo_dataset_765328.das";
    String infoUrl "https://www.bco-dmo.org/dataset/765328";
    String institution "BCO-DMO";
    String keywords "basal, Basal_damage, bco, bco-dmo, biological, census, Census_Year, chemical, code, comments, Comments_1, Comments_2_sample_tag, damage, data, dataset, date, dmo, erddap, genus, Genus_Species, height, Height_of_living_tissue_cm, latitude, living, longitude, management, meter, Meter_on_transect, oceanography, office, position, preliminary, sample, side, Side_of_transect, site, species, Species_code, tag, time, tissue, total, Total_height, transect, Transect_Position, year";
    String license "https://www.bco-dmo.org/dataset/765328/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/765328";
    Float64 Northernmost_Northing 18.3167;
    String param_mapping "{'765328': {'lat': 'master - latitude', 'lon': 'master - longitude'}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/765328/parameters";
    String people_0_affiliation "State University of New York at Buffalo";
    String people_0_affiliation_acronym "SUNY Buffalo";
    String people_0_person_name "Howard Lasker";
    String people_0_person_nid "562092";
    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 "Nancy Copley";
    String people_1_person_nid "50396";
    String people_1_role "BCO-DMO Data Manager";
    String people_1_role_type "related";
    String project "Octocoral Community Dynamics";
    String projects_0_acronym "Octocoral Community Dynamics";
    String projects_0_description 
"NSF abstract:
Coral reefs are exposed to a diversity of natural and anthropogenic disturbances, and the consequences for ecosystem degradation have been widely publicized. However, the reported changes have been biased towards fishes and stony corals, and for Caribbean reefs, the most notable example of this bias are octocorals (\"soft corals\"). Although they are abundant and dominate many Caribbean reefs, they are rarely included in studies due to the difficulty of both identifying them and in quantifying their abundances. In some places there is compelling evidence that soft corals have increased in abundance, even while stony corals have become less common. This suggests that soft corals are more resilient than stony corals to the wide diversity of disturbances that have been impacting coral corals. The best coral reefs on which to study these changes are those that have been studied for decades and can provide a decadal context to more recent events, and in this regard the reefs of St. John, US Virgin Islands are unique. Stony corals on the reefs have been studied since 1987, and the soft corals from 2014. This provides unrivalled platform to evaluate patterns of octocoral abundance and recruitment; identify the patterns of change that are occurring on these reefs, and identify the processes responsible for the resilience of octocoral populations. The project will extend soft coral monitoring from 4 years to 8 years, and within this framework will examine the roles of baby corals, and their response to seafloor roughness, seawater flow, and seaweed, in determining the success of soft corals. The work will also assess whether the destructive effects of Hurricanes Irma and Maria have modified the pattern of change. In concert with these efforts the project will be closely integrated with local high schools at which the investigators will host marine biology clubs and provide independent study opportunities for their students and teachers. Unique training opportunities will be provided to undergraduate and graduate students, as well as a postdoctoral researcher, all of whom will study and work in St. John, and the investigators will train coral reef researchers to identify the species of soft corals through a hands-on workshop to be conducted in the Florida Keys.
Understanding how changing environmental conditions will affect the community structure of major biomes is the ecological objective defining the 21st century. The holistic effects of these conditions on coral reefs will be studied on shallow reefs within the Virgin Islands National Park in St. John, US Virgin Islands, which is the site of one of the longest-running, long-term studies of coral reef community dynamics in the region. With NSF-LTREB support, the investigators have been studying long-term changes in stony coral communities in this location since 1987, and in 2014 NSF-OCE support was used to build an octocoral \"overlay\" to this decadal perspective. The present project extends from this unique history, which has been punctuated by the effects of Hurricanes Irma and Maria, to place octocoral synecology in a decadal context, and the investigators exploit a rich suite of legacy data to better understand the present and immediate future of Caribbean coral reefs. This four-year project will advance on two concurrent fronts: first, to extend time-series analyses of octocoral communities from four to eight years to characterize the pattern and pace of change in community structure, and second, to conduct a program of hypothesis-driven experiments focused on octocoral settlement that will uncover the mechanisms allowing octocorals to more effectively colonize substrata than scleractinian corals on present day reefs. Specifically, the investigators will conduct mensurative and manipulative experiments addressing four hypotheses focusing on the roles of: (1) habitat complexity in distinguishing between octocoral and scleractinian recruitment niches, (2) the recruitment niche in mediating post-settlement success, (3) competition in algal turf and macroalgae in determining the success of octocoral and scleractian recruits, and (4) role of octocoral canopies in modulating the flux of particles and larvae to the seafloor beneath. The results of this study will be integrated to evaluate the factors driving higher ecological resilience of octocorals versus scleractinians on present-day Caribbean reefs.
This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.";
    String projects_0_end_date "2022-03";
    String projects_0_geolocation "St. John, US Virgin Islands";
    String projects_0_name "Collaborative Research: Pattern and process in the abundance and recruitment of Caribbean octocorals";
    String projects_0_project_nid "752508";
    String projects_0_start_date "2018-04";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 18.3029;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String subsetVariables "Census_Year";
    String summary "Octocoral colony heights measured during transect surveys at four sites on the south shore of St. John, US Virgin Islands in June-August 2018.";
    String title "Octocoral colony heights measured during transect surveys at four sites on the south shore of St. John, US Virgin Islands in June-August 2018.";
    String version "1";
    Float64 Westernmost_Easting -64.7299;
    String xml_source "osprey2erddap.update_xml() v1.3";
  }
}

 

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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