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Dataset Title:  Mesozooplankton community grazing for 5 size classes and total for samples
collected by ring net tows on R/V Melville cruise MV1008 in the Costa Rica Dome
in 2010 (CRD FLUZiE project)
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_516670)
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
 
   Maximum ?
 
 event (integer) ?          14    1109
 tow (integer) ?          1    55
 cycle (text) ?          "Cycle_1"    "Transect_Stn_9"
 time_of_day (code) ?          1    2
 date_local (unitless) ?          "06232010"    "07232010"
 time_local (HHMM) ?          "0010"    "2355"
 latitude (degrees_north) ?          6.628    10.3
  < slider >
 longitude (degrees_east) ?          -92.987    -86.735
  < slider >
 depth (m) ?          100.0    202.0
  < slider >
 size_class (millimeters (mm)) ?          "0.2_to_0.5"    "total"
 grazing_rate (micrograms chlorophyll-a equivalents per square meter per hour (ug Chl a equiv m-2 h -1)) ?          0.0    755.2
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  event {
    Int16 _FillValue 32767;
    Int16 actual_range 14, 1109;
    String bcodmo_name "event";
    String description "Number referring to the particular activity (event) on the FluZiE cruise.";
    String long_name "Event";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/EVTAGFL/";
    String units "integer";
  }
  tow {
    Byte _FillValue 127;
    Byte actual_range 1, 55;
    String bcodmo_name "tow";
    String description "Tow number.";
    String long_name "Tow";
    String units "integer";
  }
  cycle {
    String bcodmo_name "unknown";
    String description "Type and number of cruise sampling event. Either \"Stn_n\" or \"Cycle_n\". A transect of stations was sampled from 29 June to 03 July. Five quasi-Lagrangian experiments called \"cycles\" were conducted during the remainder of the cruise.";
    String long_name "Cycle";
    String units "text";
  }
  time_of_day {
    Byte _FillValue 127;
    Byte actual_range 1, 2;
    String bcodmo_name "time_of_day";
    String description "Time of day. 1 = day; 2= night.";
    String long_name "Time Of Day";
    String units "code";
  }
  date_local {
    String bcodmo_name "date_local";
    String description "Date of tow (local time zone of UTC -6). in the format mmddyyyy";
    String long_name "Date Local";
    String units "unitless";
  }
  time_local {
    String bcodmo_name "time_local";
    String description "Time at start of tow (local time zone of UTC -6).";
    String long_name "Time Local";
    String units "HHMM";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range 6.628, 10.3;
    String axis "Y";
    String bcodmo_name "latitude";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "Latitude in degrees North.";
    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 -92.987, -86.735;
    String axis "X";
    String bcodmo_name "longitude";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "Longitude in degrees East.";
    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 {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 _FillValue NaN;
    Float64 actual_range 100.0, 202.0;
    String axis "Z";
    String bcodmo_name "depth";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String description "Depth of the tow.";
    String ioos_category "Location";
    String long_name "Depth";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/DEPH/";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  size_class {
    String bcodmo_name "unknown";
    String description 
"Mesozooplankton size class.
0.2_to_0.5 = 02.-0.5 mm;
0.5_to_1 = 0.5-1 mm;
1_to_2 = 1-2 mm;
2_to_5 = 2-5 mm;
gt5 = greater than 5 mm;
total = total for all size classes.";
    String long_name "Size Class";
    String units "millimeters (mm)";
  }
  grazing_rate {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 755.2;
    String bcodmo_name "unknown";
    String description "Clearance rate of water column Chl a for mesozooplankton size classes based on the gut fluorescence method.";
    String long_name "Grazing Rate";
    String units "micrograms chlorophyll-a equivalents per square meter per hour (ug Chl a equiv m-2 h -1)";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson";
    String acquisition_description 
"Mesozooplankton net collections  
 Mesozooplankton sampling was conducted using a standard 1-m2 ring net with
202-um Nitex mesh, towed obliquely for 20 min at a ship speed of 1-2 kts. A
General Oceanics flowmeter was attached across the net mouth to record volume
filtered, and a Vemco depth meter was fastened to the net frame to record tow
depth and duration. The target depth of tows was 150m. Once on deck, the net
was washed down with seawater and the contents of the cod end placed in a
bucket with carbonated water to prevent gut evacuation. Separate splits (each
of typically 1/8th of the sample) were used for biomass and gut-fluorescence
determinations, with the latter done first to minimize pigment degradation.
Each of these subsample splits was wet sieved into five size classes of
0.2-0.5, 0.5-1, 1-2, 2-5, and >5 mm.
 
Gut pigment and grazing estimates  
 Each size-fractioned sample for gut pigment analysis was concentrated onto a
47-mm 202-um Nitex filter and immediately frozen in liquid nitrogen for
processing on shipboard or in the lab. The filters were subsampled for the
three smallest size classes, by placing the frozen filters centered under a
plastic template and sectioning into 8 pie-shaped fractions with a thin knife
blade. Analyses were carried out in duplicate. The replicate 1/8th samples
were ground in 90% acetone using a sonicator to extract pigments, and the
homogenate was centrifuged to remove particulates. For the 2-5 mm size class,
typically the whole sample was processed, although if very dense a smaller
subsample was taken. The >5 mm size class was always processed in its
entirety. Concentrations of chlorophyll a (Chl a) and phaeopigments (Phaeo)
were then measured using a Turner 10AU fluorometer.
 
For each size-fraction analyzed, the investigators computed the depth-
integrated grazing rate (GR) using phaeopigments only to obtain conservative
rates. The GR was calculated in the euphotic zone as:
 
GR = [ (pig * D) / (vol * f) ] * K
 
where GR is the grazing rate (ug m-2 h-1), pig is the measured pigment value
(ug, based on phaeopigments), f is fraction of sample analyzed, D is depth of
tow (m), vol is the volume of water filtered (m3), and K is the gut evacuation
rate constant. For K, the investigators used the rate constant of 2.1 h-1
derived from shipboard gut evacuation experiments at 140\\u00b0W during the
JGOFS EqPac program, which had similar temperatures as those encountered in
the CRD.";
    String awards_0_award_nid "515386";
    String awards_0_award_number "OCE-0826626";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward?AWD_ID=0826626";
    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 
"Mesozooplankton Community Grazing 
  PI: Michael Landry (UCSD-SIO) 
  Contact: Moira Decima (UCSD-SIO) 
  Version: 11 June 2014 
  Notes: time_of_day values: 1=day, 2=night. 
         size_class: gt5 = greater than 5 mm.";
    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 "2014-06-11T19:56:34Z";
    String date_modified "2019-12-30T15:14:20Z";
    String defaultDataQuery "&amp;time&lt;now";
    String doi "10.1575/1912/bco-dmo.516670.1";
    Float64 Easternmost_Easting -86.735;
    Float64 geospatial_lat_max 10.3;
    Float64 geospatial_lat_min 6.628;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -86.735;
    Float64 geospatial_lon_min -92.987;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 202.0;
    Float64 geospatial_vertical_min 100.0;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2022-01-23T06:06:07Z (local files)
2022-01-23T06:06:07Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_516670.html";
    String infoUrl "https://www.bco-dmo.org/dataset/516670";
    String institution "BCO-DMO";
    String instruments_0_acronym "Ring Net";
    String instruments_0_dataset_instrument_description "Mesozooplankton sampling was conducted using a standard 1-m2 ring net with 202-um Nitex mesh, towed obliquely for 20 min at a ship speed of 1-2 kts.";
    String instruments_0_dataset_instrument_nid "516693";
    String instruments_0_description "A Ring Net is a generic plankton net, made by attaching a net of any mesh size to a metal ring of any diameter.  There are 1 meter, .75 meter, .25 meter and .5 meter nets that are used regularly. The most common zooplankton ring net is 1 meter in diameter and of mesh size .333mm, also known as a 'meter net' (see Meter Net).";
    String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/22/";
    String instruments_0_instrument_name "Ring Net";
    String instruments_0_instrument_nid "444";
    String instruments_0_supplied_name "Ring Net";
    String instruments_1_acronym "Turner Fluorometer -10AU";
    String instruments_1_dataset_instrument_description "Concentrations of chlorophyll a and phaeopigments were measured using a Turner 10AU fluorometer.";
    String instruments_1_dataset_instrument_nid "516694";
    String instruments_1_description "The Turner Designs 10-AU Field Fluorometer is used to measure Chlorophyll fluorescence.  The 10AU Fluorometer can be set up for continuous-flow monitoring or discrete sample analyses. A variety of compounds can be measured using application-specific optical filters available from the manufacturer. (read more from Turner Designs, turnerdesigns.com, Sunnyvale, CA, USA)";
    String instruments_1_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L22/current/TOOL0393/";
    String instruments_1_instrument_name "Turner Designs Fluorometer -10-AU";
    String instruments_1_instrument_nid "464";
    String instruments_1_supplied_name "Turner Fluorometer -10AU";
    String instruments_2_acronym "Flow Meter";
    String instruments_2_dataset_instrument_description "A General Oceanics flowmeter was attached across the ring net mouth to record volume filtered.";
    String instruments_2_dataset_instrument_nid "516692";
    String instruments_2_description "General term for a sensor that quantifies the rate at which fluids (e.g. water or air) pass through sensor packages, instruments, or sampling devices. A flow meter may be mechanical, optical, electromagnetic, etc.";
    String instruments_2_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/388/";
    String instruments_2_instrument_name "Flow Meter";
    String instruments_2_instrument_nid "650";
    String instruments_2_supplied_name "General Oceanics flowmeter";
    String keywords "array, array-data, bco, bco-dmo, biological, chemical, class, comprehensive, cycle, data, dataset, date, date_local, day, depth, depth_tow, dmo, erddap, event, grazing, grazing_rate, large, latitude, local, longitude, management, oceanography, office, preliminary, rate, size, size_class, stewardship, system, time, time_local, time_of_day, tow";
    String license "https://www.bco-dmo.org/dataset/516670/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/516670";
    Float64 Northernmost_Northing 10.3;
    String param_mapping "{'516670': {'lat': 'master - latitude', 'lon': 'master - longitude', 'depth_tow': 'flag - depth'}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/516670/parameters";
    String people_0_affiliation "University of California-San Diego";
    String people_0_affiliation_acronym "UCSD-SIO";
    String people_0_person_name "Michael R. Landry";
    String people_0_person_nid "50545";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "University of California-San Diego";
    String people_1_affiliation_acronym "UCSD-SIO";
    String people_1_person_name "Moira Decima";
    String people_1_person_nid "516499";
    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 "Shannon Rauch";
    String people_2_person_nid "51498";
    String people_2_role "BCO-DMO Data Manager";
    String people_2_role_type "related";
    String project "CRD FLUZiE";
    String projects_0_acronym "CRD FLUZiE";
    String projects_0_description 
"Research was aimed at improved understanding of plankton dynamics, carbon and nutrient fluxes, and potential trace element limitation in the Costa Rica Dome region of the eastern tropical Pacific. The specific science objectives of the 2010 R/V Melville cruise (MV1008) were:
1) to assess grazing and trace metal/nutrient controls on primary production and phytoplankton standing stocks;
2) to quantify carbon and elemental fluxes and export rates from the euphotic zone; and
3) to measure microbial population, processes, stable isotope abundances associated with the OMZ and nitrite maxima.
Additional information about MV1008 can be found in the cruise report (PDF).
NOTE: The original proposal and award abstract are not relevant. The project was originally funded by NSF as experimental tests of phytoplankton controls in the Arabian Sea. Piracy concerns in the region led to the cancellation of the research cruise in 2009, and a Change of Scope request was approved to focus the project on related issues in the Costa Rica Dome (CRD).
Though this project is not formally affiliated with any large program, it aligns with IMBER's emphasis on community ecology and biogeochemistry, and the OCB focus on carbon-based measurements of production, grazing and export processes.";
    String projects_0_end_date "2013-12";
    String projects_0_geolocation "Costa Rica Dome, Eastern Tropical Pacific Ocean";
    String projects_0_name "Costa Rica Dome FLUx and Zinc Experiments";
    String projects_0_project_nid "515387";
    String projects_0_start_date "2009-01";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 6.628;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Mesozooplankton community grazing, expressed as ug pigment m-2 h-1, for 5 size classes (2-0.5, 0.5-1, 1-2, 2-5, and >5 mm) and total. Samples were collected during ring net tows on the MV1008 cruise in the Costa Rica Dome (CRD) region of the Eastern Tropical Pacific Ocean.";
    String title "Mesozooplankton community grazing for 5 size classes and total for samples collected by ring net tows on R/V Melville cruise MV1008 in the Costa Rica Dome in 2010 (CRD FLUZiE project)";
    String version "1";
    Float64 Westernmost_Easting -92.987;
    String xml_source "osprey2erddap.update_xml() v1.3";
  }
}

 

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