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Dataset Title:  Effect of lionfish presence on native fish abundance on satellite coral heads
in seagrass habitats on Eleuthera, Bahamas during 2013 (Biodiversity Loss
Effects Lionfish project)
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_655380)
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 ?
 
 year (unitless) ?      
   - +  ?
 month (unitless) ?          6    8
 visit_number (unitless) ?          1    8
 day (unitless) ?          1    30
 treatment (unitless) ?              
 reef (unitless) ?              
 start (unitless) ?              
 end (unitless) ?              
 satellite_number (unitless) ?          1    4
 satellite_distance (meters) ?          3.8    22.1
 satellite_size (meters squared) ?          0.306    4.698
 species (unitless) ?              
 length_max_1 (count) ?          0    40
 length_max_2 (count) ?          0    50
 length_max_3 (count) ?          0    40
 length_max_4 (count) ?          0    31
 length_max_5 (count) ?          0    15
 length_max_6 (count) ?          0    13
 length_max_7 (count) ?          0    6
 length_max_8 (count) ?          0    5
 length_max_9 (count) ?          0    4
 length_max_10 (count) ?          0    3
 length_max_15 (count) ?          0    6
 length_max_20 (count) ?      
   - +  ?
 length_max_25 (count) ?          0    1
 length_max_30 (count) ?          0    1
 length_max_35 (count) ?      
   - +  ?
 length_max_40 (count) ?      
   - +  ?
 length_max_45 (count) ?      
   - +  ?
 eel_shark_count (count) ?      
   - +  ?
 notes (unitless) ?              
 
Server-side Functions ?
 distinct() ?
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  year {
    Int16 _FillValue 32767;
    Int16 actual_range 2013, 2013;
    String description "Year of survey; YYYY";
    String ioos_category "Time";
    String long_name "Year";
    String units "unitless";
  }
  month {
    Byte _FillValue 127;
    Byte actual_range 6, 8;
    String description "Month of survey; mm";
    String ioos_category "Time";
    String long_name "Month";
    String units "unitless";
  }
  visit_number {
    Byte _FillValue 127;
    Byte actual_range 1, 8;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String description "Visit number; one visit per reef per week";
    String ioos_category "Statistics";
    String long_name "Visit Number";
    String units "unitless";
  }
  day {
    Byte _FillValue 127;
    Byte actual_range 1, 30;
    String description "Day of survey; dd";
    String ioos_category "Time";
    String long_name "Day";
    String units "unitless";
  }
  treatment {
    String description "Low = low lionfish treatment (lionfish removed from main reefs); High = high lionfish treatment (lionfish maintained on main reefs)";
    String ioos_category "Unknown";
    String long_name "Treatment";
    String units "unitless";
  }
  reef {
    String description "Name of main reef";
    String ioos_category "Unknown";
    String long_name "Reef";
    String units "unitless";
  }
  start {
    String description "Time that census began; HH:MM";
    String ioos_category "Unknown";
    String long_name "Start";
    String units "unitless";
  }
  end {
    String description "Time that census ended; HH:MM";
    String ioos_category "Unknown";
    String long_name "End";
    String units "unitless";
  }
  satellite_number {
    Byte _FillValue 127;
    Byte actual_range 1, 4;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String description "Each satellite coral head around each main reef was assigned a unique number (1-4)";
    String ioos_category "Statistics";
    String long_name "Satellite Number";
    String units "unitless";
  }
  satellite_distance {
    Float32 _FillValue NaN;
    Float32 actual_range 3.8, 22.1;
    String description "Distance of satellite coral head to main reef";
    String ioos_category "Unknown";
    String long_name "Satellite Distance";
    String units "meters";
  }
  satellite_size {
    Float32 _FillValue NaN;
    Float32 actual_range 0.306, 4.698;
    String description "Size of satellite coral head";
    String ioos_category "Unknown";
    String long_name "Satellite Size";
    String units "meters squared";
  }
  species {
    String description "First 2 letters of genus and first 2 letters of species; see species key dataset for full species names.";
    String ioos_category "Taxonomy";
    String long_name "Species";
    String units "unitless";
  }
  length_max_1 {
    Byte _FillValue 127;
    Byte actual_range 0, 40;
    String description "Number of individuals that were between 0-1 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 1";
    String units "count";
  }
  length_max_2 {
    Byte _FillValue 127;
    Byte actual_range 0, 50;
    String description "Number of individuals that were between 1.1-2 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 2";
    String units "count";
  }
  length_max_3 {
    Byte _FillValue 127;
    Byte actual_range 0, 40;
    String description "Number of individuals that were between 2.1-3 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 3";
    String units "count";
  }
  length_max_4 {
    Byte _FillValue 127;
    Byte actual_range 0, 31;
    String description "Number of individuals that were between 3.1-4 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 4";
    String units "count";
  }
  length_max_5 {
    Byte _FillValue 127;
    Byte actual_range 0, 15;
    String description "Number of individuals that were between 4.1-5 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 5";
    String units "count";
  }
  length_max_6 {
    Byte _FillValue 127;
    Byte actual_range 0, 13;
    String description "Number of individuals that were between 5.1-6 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 6";
    String units "count";
  }
  length_max_7 {
    Byte _FillValue 127;
    Byte actual_range 0, 6;
    String description "Number of individuals that were between 6.1-7 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 7";
    String units "count";
  }
  length_max_8 {
    Byte _FillValue 127;
    Byte actual_range 0, 5;
    String description "Number of individuals that were between 7.1-8 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 8";
    String units "count";
  }
  length_max_9 {
    Byte _FillValue 127;
    Byte actual_range 0, 4;
    String description "Number of individuals that were between 8.1-9 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 9";
    String units "count";
  }
  length_max_10 {
    Byte _FillValue 127;
    Byte actual_range 0, 3;
    String description "Number of individuals that were between 9.1-10 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 10";
    String units "count";
  }
  length_max_15 {
    Byte _FillValue 127;
    Byte actual_range 0, 6;
    String description "Number of individuals that were between 10.1-15 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 15";
    String units "count";
  }
  length_max_20 {
    Byte _FillValue 127;
    Byte actual_range 0, 0;
    String description "Number of individuals that were between 15.1-20 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 20";
    String units "count";
  }
  length_max_25 {
    Byte _FillValue 127;
    Byte actual_range 0, 1;
    String description "Number of individuals that were between 20.1-25 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 25";
    String units "count";
  }
  length_max_30 {
    Byte _FillValue 127;
    Byte actual_range 0, 1;
    String description "Number of individuals that were between 25.1-30 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 30";
    String units "count";
  }
  length_max_35 {
    Byte _FillValue 127;
    Byte actual_range 0, 0;
    String description "Number of individuals that were between 30.1-35 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 35";
    String units "count";
  }
  length_max_40 {
    Byte _FillValue 127;
    Byte actual_range 0, 0;
    String description "Number of individuals that were between 35.1-40 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 40";
    String units "count";
  }
  length_max_45 {
    Byte _FillValue 127;
    Byte actual_range 0, 0;
    String description "Number of individuals that were between 40.1-45 cm total length";
    String ioos_category "Unknown";
    String long_name "Length Max 45";
    String units "count";
  }
  eel_shark_count {
    Byte _FillValue 127;
    Byte actual_range 0, 0;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String description "Abundance of large eels and sharks (GYMO - green moray, GICI - nurse shark); sizes were not estimated. See species key dataset for full species names.";
    String ioos_category "Statistics";
    String long_name "Eel Shark Count";
    String units "count";
  }
  notes {
    String description "Notes on site observations";
    String ioos_category "Unknown";
    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 "Dr David  L. Garrison";
    String awards_0_program_manager_nid "50534";
    String cdm_data_type "Other";
    String comment 
"Seagrass Habitats - Satellite Coral Heads 
   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 2.2d  13 Jun 2019";
    String date_created "2016-08-23T16:07:22Z";
    String date_modified "2019-05-14T17:24:57Z";
    String defaultDataQuery "&time";
    String doi "10.1575/1912/bco-dmo.655380.1";
    String history 
"2019-06-25T07:27:16Z (local files)
2019-06-25T07:27:16Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_655380.html";
    String infoUrl "https://www.bco-dmo.org/dataset/655380";
    String institution "BCO-DMO";
    String keywords "bco, bco-dmo, biological, chemical, count, data, dataset, day, distance, dmo, eel, eel_shark_count, end, erddap, length, length_max_1, length_max_10, length_max_15, length_max_2, length_max_20, length_max_25, length_max_3, length_max_30, length_max_35, length_max_4, length_max_40, length_max_45, length_max_5, length_max_6, length_max_7, length_max_8, length_max_9, management, max, month, notes, number, oceanography, office, preliminary, reef, satellite, satellite_distance, satellite_number, satellite_size, shark, size, species, start, statistics, taxonomy, time, treatment, visit, visit_number, year";
    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/655380";
    String param_mapping "{'655380': {}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/655380/parameters";
    String people_0_affiliation "University of Hawaii";
    String people_0_person_name "Dr 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 "Dr 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 "Mechanisms and Consequences of Fish Biodiversity Loss on Atlantic Coral Reefs Caused by Invasive Pacific 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 "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 "year, length_max_20, length_max_35, length_max_40, length_max_45, eel_shark_count";
    String summary "Effect of lionfish presence on native fish abundance on satellite coral heads in seagrass habitats on Eleuthera, Bahamas during 2013 (Biodiversity Loss Effects Lionfish project)";
    String title "Effect of lionfish presence on native fish abundance on satellite coral heads in seagrass habitats on Eleuthera, Bahamas during 2013 (Biodiversity Loss Effects Lionfish project)";
    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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