Accessing BCO-DMO data
log in    
Brought to you by BCO-DMO    

ERDDAP > info > bcodmo_dataset_775500

Title Sum-
Institution Dataset ID
     data   graph     files  public Experiment testing the temperature dependence of urchin grazing at the Galapagos Science
Center on San Cristobal Island from February to March 2018
   ?     I   M   background (external link) RSS Subscribe BCO-DMO bcodmo_dataset_775500

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv
attribute NC_GLOBAL acquisition_description String For each temperature run (i.e., each experimental level) eight urchins of each
species were collected from Cerro Tijieretas cove
(0\u00b053\u201916.78\u201dS, 89\u00b036\u201929.18\u201dW) at an average
depth of 4 m. Urchins were transported in plastic containers filled with sea
water to the UNC/USFQ Galapagos Science Center.\u00a0

Each individual, whose volume has been calculated using a beaker (ie, via
water displacement), was randomly assigned to a numbered mesocosm: green and
pencil urchins were placed in 21x11x9 cm and 42x9 cm (circumference x depth),
respectively, with 5g (wet weight) of fresh Ulva sp. each taken from the Cerro
Tijieretas site. Ulva sp. was weighed after excess water was removed using a
salad spinner that was cycled twice for 20 repetitions. The 16 mesocosms were
then placed randomly within a large water bath of 130x60x35 dimensions at the
temperature to be tested randomly. A chiller and two heaters, paired with an
Apex aquarium thermostat, were used to control the water temperature inside
the water bath. Each mesocosm closed with a wire mesh top so that the water
temperature inside the mesocosm was the same as that in the aquarium and water
could be exchanged freely. Before the test, the individuals were left to fast
for 24 hours in basins with oxygenators. The water inside the basins was
changed approximately every 12 hours with new sea water at an ambient
temperature of ~23\u00b0C. This procedure was repeated for every temperature
attribute NC_GLOBAL awards_0_award_nid String 739776
attribute NC_GLOBAL awards_0_award_number String OCE-1737071
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1737071 (external link)
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 GSC experiment testing the temperature dependence of urchin grazing.
PI: John Bruno
Version: 2019-08-15
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/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3 19 Dec 2019
attribute NC_GLOBAL date_created String 2019-08-15T20:10:15Z
attribute NC_GLOBAL date_modified String 2019-08-20T13:19:00Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.775500.1
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/775500 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String Aquarium
attribute NC_GLOBAL instruments_0_dataset_instrument_description String Each mesocosm closed with a wire mesh top so that the water temperature inside the mesocosm was the same as that in the aquarium and water could be exchanged freely.
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 775514
attribute NC_GLOBAL instruments_0_description String Aquarium - a vivarium consisting of at least one transparent side in which water-dwelling plants or animals are kept
attribute NC_GLOBAL instruments_0_instrument_name String Aquarium
attribute NC_GLOBAL instruments_0_instrument_nid String 711
attribute NC_GLOBAL instruments_0_supplied_name String aquarium
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, chemical, data, dataset, dmo, erddap, grazing, management, mesocosm, oceanography, office, preliminary, species, temperature
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/775500/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/775500 (external link)
attribute NC_GLOBAL param_mapping String {'775500': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/775500/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of North Carolina at Chapel Hill
attribute NC_GLOBAL people_0_affiliation_acronym String UNC-Chapel Hill
attribute NC_GLOBAL people_0_person_name String John Bruno
attribute NC_GLOBAL people_0_person_nid String 739779
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 Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_1_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_1_person_name String Mathew Biddle
attribute NC_GLOBAL people_1_person_nid String 708682
attribute NC_GLOBAL people_1_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL project String Temperature and Herbivory
attribute NC_GLOBAL projects_0_acronym String Temperature and Herbivory
attribute NC_GLOBAL projects_0_description String NSF Award Abstract:
A well-known pattern in coastal marine systems is a positive association between the biomass of primary producers and the occurrence or intensity of upwelling. This is assumed to be caused by the increase in nutrient concentration associated with upwelling, enabling higher primary production and thus greater standing algal biomass. However, upwelling also causes large, rapid declines in water temperature. Because the metabolism of fish and invertebrate herbivores is temperature-dependent, cooler upwelled water could reduce consumer metabolism and grazing intensity. This could in turn lead to increased standing algal biomass. Thus upwelling could influence both bottom-up and top-down control of populations and communities of primary producers. The purpose of this study is to test the hypothesis that grazing intensity and algal biomass are, in part, regulated by temperature via the temperature-dependence of metabolic rates. Broader impacts include the training and retention of minority students through UNC's Course Based Undergraduate Research program, support of undergraduate research, teacher training, and various outreach activities.
The investigators will take advantage of the uniquely strong spatiotemporal variance in water temperature in the Galápagos Islands to compare grazing intensity and primary production across a natural temperature gradient. They will combine field monitoring, statistical modeling, grazing assays, populations-specific metabolic measurements, and in situ herbivore exclusion and nutrient addition to measure the effects of temperature on pattern and process in shallow subtidal communities. The researchers will also test the hypothesis that grazer populations at warmer sites and/or during warmer seasons are less thermally sensitive, potentially due to acclimatization or adaptation. Finally, the investigators will perform a series of mesocosm experiments to measure the effect of near-future temperatures on herbivores, algae, and herbivory. This work could change the way we view upwelling systems, particularly how primary production is regulated and the temperature-dependence of energy transfer across trophic levels.
attribute NC_GLOBAL projects_0_end_date String 2020-07
attribute NC_GLOBAL projects_0_name String The Role of Temperature in Regulating Herbivory and Algal Biomass in Upwelling Systems
attribute NC_GLOBAL projects_0_project_nid String 739777
attribute NC_GLOBAL projects_0_project_website String https://github.com/johnfbruno/Galapagos_NSF.git (external link)
attribute NC_GLOBAL projects_0_start_date String 2017-08
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 standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String This study was conducted from February to March 2018 at the Galapagos Science Center on San Cristobal Island. The rate of Ulva sp. consumption by the two sea urchins, Lytechinus semituberculatus and Eucidaris galapagensis was measured at 10 temperatures: 14\u00b0, 16\u00b0, 18\u00b0, 20\u00b0, 22\u00b0, 24\u00b0, 26\u00b0, 28\u00b0, 30\u00b0, 32\u00b0C. L. semituberculatus (green urchin), E. galapaguensis (pencil urchin) and T. depressus (white urchin) are the three most common species in the Galapagos Islands and together make up 91% of the sea urchin biomass. Ulva sp. was used as the prey item because it is one of the most abundant macroalgal species, together with turf, encrusting coralline algae and Sargassum near the Galapagos and coast and because it is highly palatable for herbivores.
attribute NC_GLOBAL title String Experiment testing the temperature dependence of urchin grazing at the Galapagos Science Center on San Cristobal Island from February to March 2018
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable Mesocosm   byte  
attribute Mesocosm _FillValue byte 127
attribute Mesocosm actual_range byte 1, 8
attribute Mesocosm bcodmo_name String sample
attribute Mesocosm description String mesocosm identifier
attribute Mesocosm long_name String Mesocosm
attribute Mesocosm nerc_identifier String https://vocab.nerc.ac.uk/collection/P02/current/ACYC/ (external link)
attribute Mesocosm units String unitless
variable Species   String  
attribute Species bcodmo_name String species
attribute Species description String Species of sea urchin
attribute Species long_name String Species
attribute Species units String unitless
variable Temperature   byte  
attribute Temperature _FillValue byte 127
attribute Temperature actual_range byte 18, 32
attribute Temperature bcodmo_name String temperature
attribute Temperature description String water temperature
attribute Temperature long_name String Temperature
attribute Temperature nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/ (external link)
attribute Temperature units String degrees Celsius
variable Grazing   double  
attribute Grazing _FillValue double NaN
attribute Grazing actual_range double 0.0, 0.049411765
attribute Grazing bcodmo_name String unknown
attribute Grazing description String volume of Ulva app eater (g) divided by the urchin volume; I.e. size normalized grazing rate.
attribute Grazing long_name String Grazing
attribute Grazing units String unitless

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.

ERDDAP, Version 2.02
Disclaimers | Privacy Policy | Contact