ERDDAP > info > bcodmo_dataset_775500

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 mail	Institution	Dataset ID
		data	graph		files	public	[GSC urchin grazing] - Experiment testing the temperature dependence of urchin grazing at the Galapagos Science Center on San Cristobal Island from February to March 2018 (The Role of Temperature in Regulating Herbivory and Algal Biomass in Upwelling Systems)		I   M	background			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 tested.
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
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/
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
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
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/775500
attribute	NC_GLOBAL	param_mapping	String	{'775500': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/775500/parameters
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
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	[GSC urchin grazing] - Experiment testing the temperature dependence of urchin grazing at the Galapagos Science Center on San Cristobal Island from February to March 2018 (The Role of Temperature in Regulating Herbivory and Algal Biomass in Upwelling Systems)
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/
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/
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.