BCO-DMO ERDDAP
Accessing BCO-DMO data |
log in
Brought to you by BCO-DMO |
Grid DAP Data | Sub- set | Table DAP Data | Make A Graph | W M S | Source Data Files | Acces- sible | Title | Sum- mary | FGDC, ISO, Metadata | Back- ground Info | RSS | E | Institution | Dataset ID |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
data | graph | files | public | [grazing and growth rates] - Protist rates from epifluorescence counts; cyanobacteria rates from flow cytometry; bulk rates from extracted chlorophyll-a from R/V Atlantic Explorer cruises AE1102, AE1118, AE1206, AE1219 in the Sargasso Sea, BATS, 2011-2012 (Plankton Community Composition and Trophic Interactions as Modifiers of Carbon Export in the Sargasso Sea ) | F I M | background | BCO-DMO | bcodmo_dataset_545844 |
Row Type | Variable Name | Attribute Name | Data Type | Value |
---|---|---|---|---|
attribute | NC_GLOBAL | access_formats | String | .htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson |
attribute | NC_GLOBAL | acquisition_description | String | Water Column Sampling: Water column sampling was performed on four cruises during the spring and the summer of 2011 and 2012 at the Bermuda Atlantic Time-series Study station (31\u201940\u00b0N 64\u201910\u00b0W, BATS) and in the mesoscale eddies found in the surrounding area of the Sargasso Sea. For each cruise, two stations were sampled, usually in the center of a mesoscale eddy and at BATS. The edge of the eddy was sampled two times, as well. To be able to get a better reproducibility of data, each experiment was replicated. For each experiment, seawater samples were collected pre-dawn (on deck 2:30-4:00, local time) at four different depths within the euphotic zone (20m, 50m, 80m and the Deep Chlorophyll Maximum, DCM). Twenty-one 10L Niskin bottles were attached to a rosette with conductivity, temperature, depth sensors (CTD), and an in vivo fluorometer. This sensor allowed for recording in real time of chlorophyll fluorescence and the DCM for each station. The water that was collected from the 10L Niskin bottles was sampled for abundance and biomass of the plankton community. Dilution experiments: The growth and grazing rates of the phytoplankton community were determined using the dilution method with a two-point modification (Landry et al. 1984, Landry et al. 2008a, Selph et al. 2011). To check the applicability and resolution of the two point modification, two experiments at two different stations (one replicate of C3 and one replicate of B3) were carried out with a complete set of dilutions (25, 50, 75 and 100%) on-deck; the results of these experiments confirmed the validity of the 2 point dilution experiment (data not shown). The Landry-Hassett dilution method was used because it can separate autotrophic and heterotrophic processes with relatively little manipulation (Landry & Hassett, 1982, Landry et al 1984). The method is based on the concept that the dilution lowers the encounter probability of grazer and prey and enables one to calculate from the net phytoplankton population growth (k) in the diluted and undiluted incubation bottles the instantaneous growth rate (u) and grazing mortality (g), where k= u - g (Landry & Hassett, 1982). This method is based on three assumptions. \u00a0The first one is that the instantaneous growth rate of any phytoplankton group is not influenced by the dilution of the \u201cseawater/sample\u201d with particle free water. The second assumption is that the probability of a phytoplankton to be grazed by the consumer is directly related to the abundance of the consumer itself, which means that with a higher density of grazers the probability of the prey to be grazed is higher as well, making the grazing a function of the dilution. The third assumption is the sum of the first two assumptions, that the change in the abundance of the phytoplankton community over time can be expressed by the exponential growth equation: Pt=P0 e ^ [(u -xg)t] where P0 and Pt \u00a0are the initial and the final abundances or biomass of bulk or specific phytoplankton groups, t is time in day (d), u is the instantaneous phytoplankton growth rate (d-1), g is the grazing mortality (d-1), and x represents the dilution factor (Landry and Hassett 1982; Landry et al. 1984; Neuer and Cowles 1994). M and g are calculated as the y-intercept and the slope of the linear regression plotted against the dilution factors where k=1/t ln (Pt/P0) (Landry & Hassett, 1982; Landry et al. 1984). For the two-point dilution, this converts mathematically to solving the equations for u and g (Landry et al., 2008a). Bulk measurements: Chlorophyll-a was extracted from seawater (250 ml and 400 ml depending on the dilution), with 90% acetone and measured after 24hrs at 4 degrees C in the dark onboard the ship using a TD 700 Laboratory Fluorometer using the non- acidification technique (Welschmeyer 1994). These data were used as a proxy for the phytoplankton biomass in the water column and to calculate the bulk growth and grazing rates of the phytoplankton community. |
attribute | NC_GLOBAL | awards_0_award_nid | String | 55163 |
attribute | NC_GLOBAL | awards_0_award_number | String | OCE-1030476 |
attribute | NC_GLOBAL | awards_0_data_url | String | http://www.nsf.gov/awardsearch/showAward?AWD_ID=1030476&HistoricalAwards=false |
attribute | NC_GLOBAL | awards_0_funder_name | String | NSF Division of Ocean Sciences |
attribute | NC_GLOBAL | awards_0_funding_acronym | String | NSF OCE |
attribute | NC_GLOBAL | awards_0_funding_source_nid | String | 355 |
attribute | NC_GLOBAL | awards_0_program_manager | String | David L. Garrison |
attribute | NC_GLOBAL | awards_0_program_manager_nid | String | 50534 |
attribute | NC_GLOBAL | cdm_data_type | String | Other |
attribute | NC_GLOBAL | comment | String | Protist rates based on epifluorescence counts; cyanobacteria rates based on flow cytometry data; bulk rates based on extracted chlorophyll PI: Susanne Neuer (Arizona State U.) Version: 16 January 2015 |
attribute | NC_GLOBAL | Conventions | String | COARDS, CF-1.6, ACDD-1.3 |
attribute | NC_GLOBAL | creator_email | String | info at bco-dmo.org |
attribute | NC_GLOBAL | creator_name | String | BCO-DMO |
attribute | NC_GLOBAL | creator_type | String | institution |
attribute | NC_GLOBAL | creator_url | String | https://www.bco-dmo.org/ |
attribute | NC_GLOBAL | data_source | String | extract_data_as_tsv version 2.3 19 Dec 2019 |
attribute | NC_GLOBAL | date_created | String | 2015-01-16T16:30:36Z |
attribute | NC_GLOBAL | date_modified | String | 2019-08-05T19:37:37Z |
attribute | NC_GLOBAL | defaultDataQuery | String | &time<now |
attribute | NC_GLOBAL | doi | String | 10.1575/1912/bco-dmo.545844.1 |
attribute | NC_GLOBAL | Easternmost_Easting | double | -63.48 |
attribute | NC_GLOBAL | geospatial_lat_max | double | 33.5 |
attribute | NC_GLOBAL | geospatial_lat_min | double | 30.05 |
attribute | NC_GLOBAL | geospatial_lat_units | String | degrees_north |
attribute | NC_GLOBAL | geospatial_lon_max | double | -63.48 |
attribute | NC_GLOBAL | geospatial_lon_min | double | -65.8 |
attribute | NC_GLOBAL | geospatial_lon_units | String | degrees_east |
attribute | NC_GLOBAL | geospatial_vertical_max | double | 100.0 |
attribute | NC_GLOBAL | geospatial_vertical_min | double | 20.0 |
attribute | NC_GLOBAL | geospatial_vertical_positive | String | down |
attribute | NC_GLOBAL | geospatial_vertical_units | String | m |
attribute | NC_GLOBAL | infoUrl | String | https://www.bco-dmo.org/dataset/545844 |
attribute | NC_GLOBAL | institution | String | BCO-DMO |
attribute | NC_GLOBAL | instruments_0_acronym | String | Niskin bottle |
attribute | NC_GLOBAL | instruments_0_dataset_instrument_description | String | Samples were collected using 10-Liter Niskin bottles attached to a CTD rosette. |
attribute | NC_GLOBAL | instruments_0_dataset_instrument_nid | String | 545856 |
attribute | NC_GLOBAL | instruments_0_description | String | A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24 or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc. |
attribute | NC_GLOBAL | instruments_0_instrument_external_identifier | String | https://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/ |
attribute | NC_GLOBAL | instruments_0_instrument_name | String | Niskin bottle |
attribute | NC_GLOBAL | instruments_0_instrument_nid | String | 413 |
attribute | NC_GLOBAL | instruments_0_supplied_name | String | Niskin bottle |
attribute | NC_GLOBAL | instruments_1_acronym | String | TD-700 |
attribute | NC_GLOBAL | instruments_1_dataset_instrument_description | String | Chlorophyll-a was extracted from seawater (250 ml and 400 ml depending on the dilution), with 90% acetone and measured after 24hrs at 4 degrees C in the dark onboard ship using a TD 700 Laboratory Fluorometer using the non-acidification technique (Welschmeyer 1994). |
attribute | NC_GLOBAL | instruments_1_dataset_instrument_nid | String | 545857 |
attribute | NC_GLOBAL | instruments_1_description | String | The TD-700 Laboratory Fluorometer is a benchtop fluorometer designed to detect fluorescence over the UV to red range. The instrument can measure concentrations of a variety of compounds, including chlorophyll-a and fluorescent dyes, and is thus suitable for a range of applications, including chlorophyll, water quality monitoring and fluorescent tracer studies. Data can be output as concentrations or raw fluorescence measurements. |
attribute | NC_GLOBAL | instruments_1_instrument_external_identifier | String | https://vocab.nerc.ac.uk/collection/L22/current/TOOL0510/ |
attribute | NC_GLOBAL | instruments_1_instrument_name | String | Turner Designs 700 Laboratory Fluorometer |
attribute | NC_GLOBAL | instruments_1_instrument_nid | String | 694 |
attribute | NC_GLOBAL | instruments_1_supplied_name | String | TD 700 Laboratory Fluorometer |
attribute | NC_GLOBAL | keywords | String | bco, bco-dmo, biological, cast, chemical, cruise, cruise_id, data, dataset, date, depth, description, dmo, erddap, experiment, experiment_num, latitude, location_description, longitude, management, num, oceanography, office, preliminary, station, taxon, u |
attribute | NC_GLOBAL | license | String | https://www.bco-dmo.org/dataset/545844/license |
attribute | NC_GLOBAL | metadata_source | String | https://www.bco-dmo.org/api/dataset/545844 |
attribute | NC_GLOBAL | Northernmost_Northing | double | 33.5 |
attribute | NC_GLOBAL | param_mapping | String | {'545844': {'lat': 'master - latitude', 'depth': 'master - depth', 'lon': 'master - longitude'}} |
attribute | NC_GLOBAL | parameter_source | String | https://www.bco-dmo.org/mapserver/dataset/545844/parameters |
attribute | NC_GLOBAL | people_0_affiliation | String | Arizona State University |
attribute | NC_GLOBAL | people_0_affiliation_acronym | String | ASU |
attribute | NC_GLOBAL | people_0_person_name | String | Susanne Neuer |
attribute | NC_GLOBAL | people_0_person_nid | String | 51336 |
attribute | NC_GLOBAL | people_0_role | String | Principal Investigator |
attribute | NC_GLOBAL | people_0_role_type | String | originator |
attribute | NC_GLOBAL | people_1_affiliation | String | Arizona State University |
attribute | NC_GLOBAL | people_1_affiliation_acronym | String | ASU |
attribute | NC_GLOBAL | people_1_person_name | String | Francesca De Martini |
attribute | NC_GLOBAL | people_1_person_nid | String | 51719 |
attribute | NC_GLOBAL | people_1_role | String | Student |
attribute | NC_GLOBAL | people_1_role_type | String | related |
attribute | NC_GLOBAL | people_2_affiliation | String | Arizona State University |
attribute | NC_GLOBAL | people_2_affiliation_acronym | String | ASU |
attribute | NC_GLOBAL | people_2_person_name | String | Susanne Neuer |
attribute | NC_GLOBAL | people_2_person_nid | String | 51336 |
attribute | NC_GLOBAL | people_2_role | String | Contact |
attribute | NC_GLOBAL | people_2_role_type | String | related |
attribute | NC_GLOBAL | people_3_affiliation | String | Woods Hole Oceanographic Institution |
attribute | NC_GLOBAL | people_3_affiliation_acronym | String | WHOI BCO-DMO |
attribute | NC_GLOBAL | people_3_person_name | String | Shannon Rauch |
attribute | NC_GLOBAL | people_3_person_nid | String | 51498 |
attribute | NC_GLOBAL | people_3_role | String | BCO-DMO Data Manager |
attribute | NC_GLOBAL | people_3_role_type | String | related |
attribute | NC_GLOBAL | project | String | Trophic BATS |
attribute | NC_GLOBAL | projects_0_acronym | String | Trophic BATS |
attribute | NC_GLOBAL | projects_0_description | String | Fluxes of particulate carbon from the surface ocean are greatly influenced by the size, taxonomic composition and trophic interactions of the resident planktonic community. Large and/or heavily-ballasted phytoplankton such as diatoms and coccolithophores are key contributors to carbon export due to their high sinking rates and direct routes of export through large zooplankton. The potential contributions of small, unballasted phytoplankton, through aggregation and/or trophic re-packaging, have been recognized more recently. This recognition comes as direct observations in the field show unexpected trends. In the Sargasso Sea, for example, shallow carbon export has increased in the last decade but the corresponding shift in phytoplankton community composition during this time has not been towards larger cells like diatoms. Instead, the abundance of the picoplanktonic cyanobacterium, Synechococccus, has increased significantly. The trophic pathways that link the increased abundance of Synechococcus to carbon export have not been characterized. These observations helped to frame the overarching research question, "How do plankton size, community composition and trophic interactions modify carbon export from the euphotic zone". Since small phytoplankton are responsible for the majority of primary production in oligotrophic subtropical gyres, the trophic interactions that include them must be characterized in order to achieve a mechanistic understanding of the function of the biological pump in the oligotrophic regions of the ocean. This requires a complete characterization of the major organisms and their rates of production and consumption. Accordingly, the research objectives are: 1) to characterize (qualitatively and quantitatively) trophic interactions between major plankton groups in the euphotic zone and rates of, and contributors to, carbon export and 2) to develop a constrained food web model, based on these data, that will allow us to better understand current and predict near-future patterns in export production in the Sargasso Sea. The investigators will use a combination of field-based process studies and food web modeling to quantify rates of carbon exchange between key components of the ecosystem at the Bermuda Atlantic Time-series Study (BATS) site. Measurements will include a novel DNA-based approach to characterizing and quantifying planktonic contributors to carbon export. The well-documented seasonal variability at BATS and the occurrence of mesoscale eddies will be used as a natural laboratory in which to study ecosystems of different structure. This study is unique in that it aims to characterize multiple food web interactions and carbon export simultaneously and over similar time and space scales. A key strength of the proposed research is also the tight connection and feedback between the data collection and modeling components. Characterizing the complex interactions between the biological community and export production is critical for predicting changes in phytoplankton species dominance, trophic relationships and export production that might occur under scenarios of climate-related changes in ocean circulation and mixing. The results from this research may also contribute to understanding of the biological mechanisms that drive current regional to basin scale variability in carbon export in oligotrophic gyres. |
attribute | NC_GLOBAL | projects_0_end_date | String | 2014-09 |
attribute | NC_GLOBAL | projects_0_geolocation | String | Sargasso Sea, BATS site |
attribute | NC_GLOBAL | projects_0_name | String | Plankton Community Composition and Trophic Interactions as Modifiers of Carbon Export in the Sargasso Sea |
attribute | NC_GLOBAL | projects_0_project_nid | String | 2150 |
attribute | NC_GLOBAL | projects_0_start_date | String | 2010-10 |
attribute | NC_GLOBAL | publisher_name | String | Biological and Chemical Oceanographic Data Management Office (BCO-DMO) |
attribute | NC_GLOBAL | publisher_type | String | institution |
attribute | NC_GLOBAL | sourceUrl | String | (local files) |
attribute | NC_GLOBAL | Southernmost_Northing | double | 30.05 |
attribute | NC_GLOBAL | standard_name_vocabulary | String | CF Standard Name Table v55 |
attribute | NC_GLOBAL | summary | String | Protist rates from epifluorescence counts; cyanobacteria rates from flow cytometry; bulk rates from extracted chlorophyll-a from R/V Atlantic Explorer cruises AE1102, AE1118, AE1206, AE1219 in the Sargasso Sea, BATS, 2011-2012. |
attribute | NC_GLOBAL | title | String | [grazing and growth rates] - Protist rates from epifluorescence counts; cyanobacteria rates from flow cytometry; bulk rates from extracted chlorophyll-a from R/V Atlantic Explorer cruises AE1102, AE1118, AE1206, AE1219 in the Sargasso Sea, BATS, 2011-2012 (Plankton Community Composition and Trophic Interactions as Modifiers of Carbon Export in the Sargasso Sea ) |
attribute | NC_GLOBAL | version | String | 1 |
attribute | NC_GLOBAL | Westernmost_Easting | double | -65.8 |
attribute | NC_GLOBAL | xml_source | String | osprey2erddap.update_xml() v1.3 |
variable | cruise_id | String | ||
attribute | cruise_id | bcodmo_name | String | cruise_id |
attribute | cruise_id | description | String | Official cruise identifier e.g. AE1102 = R/V Atlantic Explorer cruise number 1102. |
attribute | cruise_id | long_name | String | Cruise Id |
attribute | cruise_id | units | String | dimensionless |
variable | cast | byte | ||
attribute | cast | _FillValue | byte | 127 |
attribute | cast | actual_range | byte | 2, 38 |
attribute | cast | bcodmo_name | String | cast |
attribute | cast | description | String | Cast number. |
attribute | cast | long_name | String | Cast |
attribute | cast | units | String | dimensionless |
variable | station | byte | ||
attribute | station | _FillValue | byte | 127 |
attribute | station | actual_range | byte | 1, 6 |
attribute | station | bcodmo_name | String | station |
attribute | station | description | String | Station number. |
attribute | station | long_name | String | Station |
attribute | station | units | String | dimensionless |
variable | location_description | String | ||
attribute | location_description | bcodmo_name | String | site_descrip |
attribute | location_description | description | String | Description of sampling location. |
attribute | location_description | long_name | String | Location Description |
attribute | location_description | units | String | dimensionless |
variable | experiment_num | byte | ||
attribute | experiment_num | _FillValue | byte | 127 |
attribute | experiment_num | actual_range | byte | 1, 19 |
attribute | experiment_num | bcodmo_name | String | unknown |
attribute | experiment_num | description | String | Experiment number. |
attribute | experiment_num | long_name | String | Experiment Num |
attribute | experiment_num | units | String | dimensionless |
variable | date | String | ||
attribute | date | bcodmo_name | String | date |
attribute | date | description | String | 2-digit month, 2-digit day, and 4-digit year of sampling. Reported in UTC. Format: mmddYYYY |
attribute | date | long_name | String | Date |
attribute | date | nerc_identifier | String | https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/ |
attribute | date | units | String | unitless |
variable | latitude | double | ||
attribute | latitude | _CoordinateAxisType | String | Lat |
attribute | latitude | _FillValue | double | NaN |
attribute | latitude | actual_range | double | 30.05, 33.5 |
attribute | latitude | axis | String | Y |
attribute | latitude | bcodmo_name | String | latitude |
attribute | latitude | colorBarMaximum | double | 90.0 |
attribute | latitude | colorBarMinimum | double | -90.0 |
attribute | latitude | description | String | Latitude. Positive values = North. |
attribute | latitude | ioos_category | String | Location |
attribute | latitude | long_name | String | Latitude |
attribute | latitude | nerc_identifier | String | https://vocab.nerc.ac.uk/collection/P09/current/LATX/ |
attribute | latitude | standard_name | String | latitude |
attribute | latitude | units | String | degrees_north |
variable | longitude | double | ||
attribute | longitude | _CoordinateAxisType | String | Lon |
attribute | longitude | _FillValue | double | NaN |
attribute | longitude | actual_range | double | -65.8, -63.48 |
attribute | longitude | axis | String | X |
attribute | longitude | bcodmo_name | String | longitude |
attribute | longitude | colorBarMaximum | double | 180.0 |
attribute | longitude | colorBarMinimum | double | -180.0 |
attribute | longitude | description | String | Longitude. Positive values = East. |
attribute | longitude | ioos_category | String | Location |
attribute | longitude | long_name | String | Longitude |
attribute | longitude | nerc_identifier | String | https://vocab.nerc.ac.uk/collection/P09/current/LONX/ |
attribute | longitude | standard_name | String | longitude |
attribute | longitude | units | String | degrees_east |
variable | taxon | String | ||
attribute | taxon | bcodmo_name | String | taxon |
attribute | taxon | description | String | Name of the taxonomic group. |
attribute | taxon | long_name | String | Taxon |
attribute | taxon | units | String | dimensionless |
variable | depth | double | ||
attribute | depth | _CoordinateAxisType | String | Height |
attribute | depth | _CoordinateZisPositive | String | down |
attribute | depth | _FillValue | double | NaN |
attribute | depth | actual_range | double | 20.0, 100.0 |
attribute | depth | axis | String | Z |
attribute | depth | bcodmo_name | String | depth |
attribute | depth | colorBarMaximum | double | 8000.0 |
attribute | depth | colorBarMinimum | double | -8000.0 |
attribute | depth | colorBarPalette | String | TopographyDepth |
attribute | depth | description | String | Sample depth. |
attribute | depth | ioos_category | String | Location |
attribute | depth | long_name | String | Depth |
attribute | depth | nerc_identifier | String | https://vocab.nerc.ac.uk/collection/P09/current/DEPH/ |
attribute | depth | positive | String | down |
attribute | depth | standard_name | String | depth |
attribute | depth | units | String | m |
variable | u | float | ||
attribute | u | _FillValue | float | NaN |
attribute | u | actual_range | float | -3.52, 11.46 |
attribute | u | bcodmo_name | String | growth |
attribute | u | description | String | Instantaneous growth rate (mu). |
attribute | u | long_name | String | U |
attribute | u | units | String | per day |
variable | g | float | ||
attribute | g | _FillValue | float | NaN |
attribute | g | actual_range | float | 0.0, 11.17 |
attribute | g | bcodmo_name | String | unknown |
attribute | g | description | String | Grazing mortality; absolute values. |
attribute | g | long_name | String | G |
attribute | g | units | String | per day |
The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.