ERDDAP > info > bcodmo_dataset_755735

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	[Lab urchin grazing assay fx temp and pCO2] - Experimental study to estimate per capita sea urchin (Strongylocentrotus polyacanthus) grazing rates on the alga Clathromorphum nereostratum as a function of seawater temperature and pCO2 concentration (Ocean Acidification: Century Scale Impacts to Ecosystem Structure and Function of Aleutian Kelp Forests)		I   M	background			BCO-DMO	bcodmo_dataset_755735

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	To evaluate whether rates of sea urchin grazing on C. nereostratum have changed or will change with ocean warming and acidification, we cultured C. nereostratum and S. polyacanthus under experimental conditions mimicking past, present, and predicted future levels of ocean temperature and pCO2 in the region, then followed this three-month culturing period with a controlled feeding experiment conducted under the same conditions. Small C. nereostratum colonies (~4-5 cm diameter) and large S. polyacanthus (~45-60 mm test diameter) were live collected from Adak in 2015 and immediately transported to the Northeastern University Marine Science Center in Nahant, Massachusetts. There, all specimens were acclimated to laboratory conditions at 8.5 \u00b0C for two weeks, after which individual C. nereostratum colonies were attached to the underside of plastic petri dishes using cyanoacrylate glue and then allowed to acclimate for an additional two weeks before being moved to experimental aquaria. Conditions were then incrementally modified to achieve target temperature and pCO2 levels (see below) over a one-week period. After reaching target conditions, each 42-L aquarium was dosed with 213 mL of calcein fluorescent dye (Western Chemicals Inc.), which was recirculated in the aquaria for three days and then flushed from the system. Coralline algae incorporate the dye into their skeleton, thus creating a distinct line that can be viewed via fluorescent microscopy to demark the region of new growth within each individual. We employed four pCO2 conditions and three temperatures that, while factorially crossed, spanned pre-industrial, present-day, and projected year 2100 conditions (assuming an IPCC \"business as usual\" carbon emissions scenario; Pachauri and Meyer 2014). More extreme temperature (12.5 degrees C) and pCO2 (2800 micro-atm) conditions were also employed in the broader experiment but were not included in our experimental feeding assay because they are not predicted to occur until year 2500, or later. For each treatment, we set temperature to average summertime conditions, the time when ~75% of C. nereostratum growth occurs (Adey et al. 2013). All treatments (4 pCO2 concentrations x 3 temperatures, fully factorial) were housed on individual shelves and consisted of three 42-liter acrylic aquaria and one 65-liter sump (n = 3 tanks/treatment). The aquaria were connected to a sump via a common overflow and return line but were each independently and continuously replenished with new seawater-thereby establishing them as true experimental replicates. The sump contained a filter box with a nylon mesh particle filter and activated carbon, a protein skimmer (Eshopps PSK-75), and a return pump, all of which was connected to a water chiller (Coralife 1/4HP). Filtered natural seawater was added via Darhor manual flow controllers at a rate of 50 mL/min/tank, resulting in full replacement of treatment water every ~21 hours-sufficiently fast to prevent material depletion of the dissolved constituents of the seawater yet slow enough to allow the mixed gases being sparged into the experimental treatments to approach equilibrium with the seawater. Mixed gases were sparged into each tank with 91 cm long flexible bubblers at the rate of ~1 L/min via Darhor needle-valve gas flow controllers. Two 12,000K LED light arrays (Ecoxotic Panorama, Pro 24V) were mounted above each tank and set to an irradiance that mirrored average summer daylight irradiance at 10 m depth in the Aleutian Islands (~258 micro-E m-2 s-1; 12 hr light:12 hr dark cycle). Over the course of the four-month experiment, we measured pH (Accumet AB15 pH meter with Accufet solid state probe), salinity (YSI3200 meter with K=10 conductivity electrode and temperature probe), and temperature (NIST traceable red spirit glass thermometer) in each tank every Monday, Wednesday, and Friday. The pCO2 of the gas mixtures was measured with a Qubit S151 infrared CO2 analyzer and calibrated with certified mixed CO2 from Airgas Incorporated. Every 10 days, we characterized the full carbonate system chemistry of the experimental treatments from measured total alkalinity, dissolved inorganic carbon, temperature, and salinity. For this, seawater samples were obtained in 250 mL borosilicate ground-glass-stoppered bottles and immediately poisoned with 100 micro-L of saturated HgCl2 solution to halt biological activity (Dickson et al. 2007). Total alkalinity was measured via closed-cell potentiometric Gran titration and dissolved inorganic carbon was measured with a UIC 5400 Coulometer on a VINDTA 3C (Marianda Incorporated) using Dickson certified seawater reference material. Seawater pCO2, pH, carbonate ion concentration ([CO32-]) bicarbonate ion concentration ([HCO3-]), aqueous CO2, and calcite saturation state were calculated with the program CO2SYS (Lewis and Wallace 1998), using Roy and colleague's (1993) values for the K1 and K2 carbonic acid constants, the Mucci (1983) value for the stoichiometric calcite solubility product, the seawater pH scale, and an atmospheric pressure of 1.015 atm. At the beginning of the experiment we measured the buoyant weight of each specimen. We then scrubbed each specimen with a toothbrush and reweighed it every month and at the end of the experiment. With each weighing, we also photographed the specimen with a ruler and Reef Watch coral bleaching card in the field of view. We then measured the 2-d surface area (coralline algae) or test diameter (urchin) of the photographed specimens (Image J, NIH). Following a three-month incubation, a subset of the coralline algae was placed individually in cages and paired with a single urchin to quantify bioerosion rate under the different treatments, while the remaining algae were retained as experimental controls during the 20-day feeding experiment, and subsequently measured for skeletal density. Following the feeding experiment, all coralline algae were sectioned with a diamond lapidary saw (Inland Craft SwapTop 6.5\" Diamond Trim Saw) and either frozen for genetic analysis or sectioned into 6 mm slices, rinsed in a series of two 90% Ethanol baths, and allowed to air dry for further examination of growth and skeletal density. After three months of culturing C. nereostratum and large S. polyacanthus (mean test diameter \u00b1 SE = 53 \u00b1 1 mm) under various temperature and pCO2 conditions (see above), we conducted a controlled feeding assay. Individual coralline algae were randomly paired with sea urchins from the same tank and placed into small cages (n = 5/tank, 15/treatment) and returned to aquaria, with the remaining coralline algae from each tank serving as controls. Buoyant weight measurements and photographs of each alga and urchin were obtained at the beginning of the experiment (as described above) and again every five days. We excluded replicates where: (i) the sea urchin appeared moribund or died during the assay; or (ii) negligible grazing occurred throughout the experiment, indicating severe stress to the animal. Buoyant weights were converted to dry weight (mg) using an empirically-derived conversion factor (linear regression: -0.117448 + 1.746361 * buoyant mass; adjusted R^2 = 0.9996; p < 0.001). To calculate the amount of C. nereostratum (mg CaCO3 dry weight) consumed by each urchin at each sampling interval while also accounting for the potential gain or loss of mass within the treatment alga, we used the equation [Ti x (Cf/Ci)] - Tf, where Ti and Tf is the initial and final mass (respectively) of an alga exposed to herbivory, and Ci and Cf\u00a0 is the initial and final mass (respectively) of its paired control. For this exercise, we averaged correction factors (Cf/Ci) for all control algae in a given tank, and applied this average correction factor to each treatment alga in the same tank. We then computed grazing rate (amount consumed/day) for each sea urchin, as well as per capita grazing rates standardized by the surface area of C. nereostratum.
attribute	NC_GLOBAL	awards_0_award_nid	String	526658
attribute	NC_GLOBAL	awards_0_award_number	String	PLR-1316141
attribute	NC_GLOBAL	awards_0_data_url	String	http://nsf.gov/awardsearch/showAward?AWD_ID=1316141
attribute	NC_GLOBAL	awards_0_funder_name	String	NSF Arctic Sciences
attribute	NC_GLOBAL	awards_0_funding_acronym	String	NSF ARC
attribute	NC_GLOBAL	awards_0_funding_source_nid	String	390
attribute	NC_GLOBAL	awards_0_program_manager	String	Henrietta N Edmonds
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	51517
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Estimates of per capita sea urchin (Strongylocentrotus polyacanthus) grazing rates on the alga Clathromorphum nereostratum PI's: Steneck (Umaine), J. Estes (UCSC), D. Rasher (BLOS) version: 2019-02-013
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	2019-02-13T21:41:10Z
attribute	NC_GLOBAL	date_modified	String	2019-02-25T21:04:03Z
attribute	NC_GLOBAL	defaultDataQuery	String	&amp;time&lt;now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.755735.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/755735
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	CO2 coulometer
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	To measure dissolved inorganic carbon
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	755749
attribute	NC_GLOBAL	instruments_0_description	String	A CO2 coulometer semi-automatically controls the sample handling and extraction of CO2 from seawater samples. Samples are acidified and the CO2 gas is bubbled into a titration cell where CO2 is converted to hydroxyethylcarbonic acid which is then automatically titrated with a coulometrically-generated base to a colorimetric endpoint.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB12
attribute	NC_GLOBAL	instruments_0_instrument_name	String	CO2 Coulometer
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	507
attribute	NC_GLOBAL	instruments_0_supplied_name	String	UIC 5400 Coulometer on a VINDTA 3C
attribute	NC_GLOBAL	instruments_1_acronym	String	Salinometer
attribute	NC_GLOBAL	instruments_1_dataset_instrument_description	String	To measure salinity and temperature of tanks
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	755746
attribute	NC_GLOBAL	instruments_1_description	String	A salinometer is a device designed to measure the salinity, or dissolved salt content, of a solution.
attribute	NC_GLOBAL	instruments_1_instrument_name	String	Salinometer
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	677
attribute	NC_GLOBAL	instruments_1_supplied_name	String	YSI3200 meter with K=10 conductivity electrode and temperature probe
attribute	NC_GLOBAL	instruments_2_acronym	String	Benchtop pH Meter
attribute	NC_GLOBAL	instruments_2_dataset_instrument_description	String	To measure pH of tanks
attribute	NC_GLOBAL	instruments_2_dataset_instrument_nid	String	755745
attribute	NC_GLOBAL	instruments_2_description	String	An instrument consisting of an electronic voltmeter and pH-responsive electrode that gives a direct conversion of voltage differences to differences of pH at the measurement temperature. (McGraw-Hill Dictionary of Scientific and Technical Terms) This instrument does not map to the NERC instrument vocabulary term for 'pH Sensor' which measures values in the water column. Benchtop models are typically employed for stationary lab applications.
attribute	NC_GLOBAL	instruments_2_instrument_name	String	Benchtop pH Meter
attribute	NC_GLOBAL	instruments_2_instrument_nid	String	681
attribute	NC_GLOBAL	instruments_2_supplied_name	String	Accumet AB15 pH meter with Accufet solid state probe
attribute	NC_GLOBAL	instruments_3_acronym	String	inorganic carbon and alkalinity analyser
attribute	NC_GLOBAL	instruments_3_dataset_instrument_nid	String	755750
attribute	NC_GLOBAL	instruments_3_description	String	The Versatile INstrument for the Determination of Total inorganic carbon and titration Alkalinity (VINDTA) 3C is a laboratory alkalinity titration system combined with an extraction unit for coulometric titration, which simultaneously determines the alkalinity and dissolved inorganic carbon content of a sample. The sample transport is performed with peristaltic pumps and acid is added to the sample using a membrane pump. No pressurizing system is required and only one gas supply (nitrogen or dry and CO2-free air) is necessary. The system uses a Metrohm Titrino 719S, an ORION-Ross pH electrode and a Metrohm reference electrode. The burette, the pipette and the analysis cell have a water jacket around them. Precision is typically +/- 1 umol/kg for TA and/or DIC in open ocean water.
attribute	NC_GLOBAL	instruments_3_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L22/current/TOOL0481/
attribute	NC_GLOBAL	instruments_3_instrument_name	String	MARIANDA VINDTA 3C total inorganic carbon and titration alkalinity analyser
attribute	NC_GLOBAL	instruments_3_instrument_nid	String	686
attribute	NC_GLOBAL	instruments_4_acronym	String	MFC
attribute	NC_GLOBAL	instruments_4_dataset_instrument_nid	String	755848
attribute	NC_GLOBAL	instruments_4_description	String	Mass Flow Controller (MFC) - A device used to measure and control the flow of fluids and gases
attribute	NC_GLOBAL	instruments_4_instrument_name	String	Mass Flow Controller
attribute	NC_GLOBAL	instruments_4_instrument_nid	String	712
attribute	NC_GLOBAL	instruments_4_supplied_name	String	Darhor manual flow controllers
attribute	NC_GLOBAL	instruments_5_acronym	String	CO2 Analyzer
attribute	NC_GLOBAL	instruments_5_dataset_instrument_description	String	To measure pCO2 in tanks
attribute	NC_GLOBAL	instruments_5_dataset_instrument_nid	String	755748
attribute	NC_GLOBAL	instruments_5_description	String	Measures atmospheric carbon dioxide (CO2) concentration.
attribute	NC_GLOBAL	instruments_5_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/382/
attribute	NC_GLOBAL	instruments_5_instrument_name	String	CO2 Analyzer
attribute	NC_GLOBAL	instruments_5_instrument_nid	String	491476
attribute	NC_GLOBAL	instruments_5_supplied_name	String	Qubit S151 infrared CO2 analyzer
attribute	NC_GLOBAL	instruments_6_acronym	String	Aquarium chiller
attribute	NC_GLOBAL	instruments_6_dataset_instrument_nid	String	755847
attribute	NC_GLOBAL	instruments_6_description	String	Immersible or in-line liquid cooling device, usually with temperature control.
attribute	NC_GLOBAL	instruments_6_instrument_name	String	Aquarium chiller
attribute	NC_GLOBAL	instruments_6_instrument_nid	String	522982
attribute	NC_GLOBAL	instruments_6_supplied_name	String	Coralife 1/4HP
attribute	NC_GLOBAL	instruments_7_dataset_instrument_description	String	To measure temperature in the tanks
attribute	NC_GLOBAL	instruments_7_dataset_instrument_nid	String	755747
attribute	NC_GLOBAL	instruments_7_instrument_name	String	Thermometer
attribute	NC_GLOBAL	instruments_7_instrument_nid	String	725867
attribute	NC_GLOBAL	instruments_7_supplied_name	String	NIST traceable red spirit glass thermometer
attribute	NC_GLOBAL	keywords	String	amount, amount_mg_consumed_cm2_day_T10, amount_mg_consumed_cm2_day_T15, amount_mg_consumed_cm2_day_T20, amount_mg_consumed_cm2_day_T5, amount_mg_consumed_day_T10, amount_mg_consumed_day_T15, amount_mg_consumed_day_T20, amount_mg_consumed_day_T5, amount_mg_consumed_T10, amount_mg_consumed_T15, amount_mg_consumed_T20, amount_mg_consumed_T5, area, ave, ave_correction_factor_T10, ave_correction_factor_T15, ave_correction_factor_T20, ave_correction_factor_T5, bco, bco-dmo, biological, carbon, carbon dioxide, cca, cca_surface_area_cm2, chemical, cm2, co2, consumed, corrected, corrected_initial_mass_grams_T10, corrected_initial_mass_grams_T15, corrected_initial_mass_grams_T20, corrected_initial_mass_grams_T5, correction, correction_factor_T10, correction_factor_T15, correction_factor_T20, correction_factor_T5, data, dataset, date, date_10, date_T15, date_T20, date_T5, day, days, diameter, dioxide, dmo, duration, duration_days_10, duration_days_T15, duration_days_T20, duration_days_T5, erddap, factor, grams, grazing, initial, management, mass, oceanography, office, preliminary, replicate, sample, sample_mass_grams_T0, sample_mass_grams_T10, sample_mass_grams_T15, sample_mass_grams_T20, sample_mass_grams_T5, sampling, sampling_time_10, sampling_time_T0, sampling_time_T15, sampling_time_T20, sampling_time_T5, standard, standard_ave_grams_T0, standard_ave_grams_T10, standard_ave_grams_T15, standard_ave_grams_T20, standard_ave_grams_T5, surface, t10, t15, t20, tank, tank_pCO2_ave, tank_temp_ave, temperature, time, treatment, treatment_grazing, treatment_pCO2, treatment_temp, urchin, urchin_diameter_mm
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/755735/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/755735
attribute	NC_GLOBAL	param_mapping	String	{'755735': {'date_T0': 'flag - time'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/755735/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	University of Maine
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	U Maine DMC
attribute	NC_GLOBAL	people_0_person_name	String	Robert S. Steneck
attribute	NC_GLOBAL	people_0_person_nid	String	526659
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	University of California-Santa Cruz
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	UC Santa Cruz
attribute	NC_GLOBAL	people_1_person_name	String	James Estes
attribute	NC_GLOBAL	people_1_person_nid	String	51389
attribute	NC_GLOBAL	people_1_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_1_role_type	String	originator
attribute	NC_GLOBAL	people_2_affiliation	String	Bigelow Laboratory for Ocean Sciences
attribute	NC_GLOBAL	people_2_person_name	String	Douglas B. Rasher
attribute	NC_GLOBAL	people_2_person_nid	String	480721
attribute	NC_GLOBAL	people_2_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_2_role_type	String	originator
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	Nancy Copley
attribute	NC_GLOBAL	people_3_person_nid	String	50396
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	OA Kelp Forest Function
attribute	NC_GLOBAL	projects_0_acronym	String	OA Kelp Forest Function
attribute	NC_GLOBAL	projects_0_description	String	Extracted from the NSF award abstract: Marine calcifying organisms are most at risk to rapid ocean acidification (OA) in cold-water ecosystems. The investigators propose to determine if a globally unique and widespread calcareous alga in Alaska's Aleutian archipelago, Clathromorphum nereostratum, is threatened with extinction due to the combined effects of OA and food web alterations. C. nereostratum is a slow growing coralline alga that can live to at least 2000 years. It accretes massive 'bioherms' that dominate the regions' rocky substrate both under kelp forests and deforested sea urchin barrens. It develops growth bands (similar to tree rings) in its calcareous skeleton, which effectively record its annual calcification rate over centuries. Pilot data suggest the skeletal density of C. nereostratum began to decline precipitously in the 1990's in some parts of the Aleutian archipelago. The investigators now propose to use high-resolution microscopy and microCT imaging to examine how the growth and skeletal density of C. nereostratum has changed in the past 300 years (i.e., since the industrial revolution) across the western Aleutians. They will compare their records of algal skeletal densities and their variation through time with reconstructions of past climate to infer causes of change. In addition, the investigators will examine whether the alga's defense against grazing by sea urchins is compromised by ongoing ocean acidification. The investigators will survey the extent of C. nereostratum bioerosion occurring at 10 sites spanning the western Aleutians, both inside and outside of kelp forests. At each site they will compare these patterns to observed and monitored ecosystem trophic structure and recent C. nereostratum calcification rates. Field observations will be combined with laboratory experiments to determine if it is a decline in the alga's skeletal density (due to recent OA and warming), an increase in grazing intensity (due to recent trophic-level dysfunction), or their interactive effects that are likely responsible for bioerosion patterns inside vs. outside of forests. By sampling C. nereostratum inside and outside of forests, they will determine if kelp forests locally increase pH via photosynthesis, and thus buffer the effects of OA on coralline calcification. The combination of field observations with laboratory controlled experiments, manipulating CO2 and temperature, will help elucidate drivers of calcification and project how these species interactions will likely change in the near future. The project will provide the first in situ example of how ongoing ocean acidification is affecting the physiology of long-lived, carbonate producing organisms in the subarctic North Pacific. It will also be one of the first studies to document whether OA, ocean warming, and food web changes to ecological processes are interacting in complex ways to reshape the outcome of species interactions in nature.
attribute	NC_GLOBAL	projects_0_end_date	String	2016-08
attribute	NC_GLOBAL	projects_0_name	String	Ocean Acidification: Century Scale Impacts to Ecosystem Structure and Function of Aleutian Kelp Forests
attribute	NC_GLOBAL	projects_0_project_nid	String	526660
attribute	NC_GLOBAL	projects_0_start_date	String	2013-09
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	Estimates of per capita sea urchin (Strongylocentrotus polyacanthus) grazing rates on the alga Clathromorphum nereostratum, evaluated as a function of seawater temperature and pCO2 concentration that each were simultaneously cultured in for three months. Incubations and assays were performed in a controlled mesocosm setting.
attribute	NC_GLOBAL	time_coverage_end	String	2016-01-15
attribute	NC_GLOBAL	time_coverage_start	String	2016-01-14
attribute	NC_GLOBAL	title	String	[Lab urchin grazing assay fx temp and pCO2] - Experimental study to estimate per capita sea urchin (Strongylocentrotus polyacanthus) grazing rates on the alga Clathromorphum nereostratum as a function of seawater temperature and pCO2 concentration (Ocean Acidification: Century Scale Impacts to Ecosystem Structure and Function of Aleutian Kelp Forests)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	treatment_temp		float
attribute	treatment_temp	_FillValue	float	NaN
attribute	treatment_temp	actual_range	float	6.5, 8.5
attribute	treatment_temp	bcodmo_name	String	treatment
attribute	treatment_temp	description	String	target temperature
attribute	treatment_temp	long_name	String	Treatment Temp
attribute	treatment_temp	units	String	degrees Celsius
variable	treatment_pCO2		short
attribute	treatment_pCO2	_FillValue	short	32767
attribute	treatment_pCO2	actual_range	short	330, 850
attribute	treatment_pCO2	bcodmo_name	String	treatment
attribute	treatment_pCO2	description	String	target pCO2 concentration
attribute	treatment_pCO2	long_name	String	Treatment P CO2
attribute	treatment_pCO2	units	String	microatmospheres (uatm)
variable	tank		byte
attribute	tank	_FillValue	byte	127
attribute	tank	actual_range	byte	1, 3
attribute	tank	bcodmo_name	String	replicate
attribute	tank	description	String	replicate tank identifier
attribute	tank	long_name	String	Tank
attribute	tank	units	String	unitless
variable	tank_temp_ave		float
attribute	tank_temp_ave	_FillValue	float	NaN
attribute	tank_temp_ave	actual_range	float	6.33, 8.91
attribute	tank_temp_ave	bcodmo_name	String	temperature
attribute	tank_temp_ave	description	String	average tank temperature during study
attribute	tank_temp_ave	long_name	String	Tank Temp Ave
attribute	tank_temp_ave	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/
attribute	tank_temp_ave	units	String	degrees Celsius
variable	tank_pCO2_ave		float
attribute	tank_pCO2_ave	_FillValue	float	NaN
attribute	tank_pCO2_ave	actual_range	float	323.1, 1110.49
attribute	tank_pCO2_ave	bcodmo_name	String	pCO2
attribute	tank_pCO2_ave	description	String	average tank pCO2 concentration during study
attribute	tank_pCO2_ave	long_name	String	Tank P CO2 Ave
attribute	tank_pCO2_ave	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/PCO2C101/
attribute	tank_pCO2_ave	units	String	microatmospheres (uatm)
variable	replicate		byte
attribute	replicate	_FillValue	byte	127
attribute	replicate	actual_range	byte	1, 5
attribute	replicate	bcodmo_name	String	replicate
attribute	replicate	description	String	replicate individual urchin or alga
attribute	replicate	long_name	String	Replicate
attribute	replicate	units	String	unitless
variable	treatment_grazing		String
attribute	treatment_grazing	bcodmo_name	String	treatment
attribute	treatment_grazing	description	String	treatment = coralline alga exposed to herbivory; control = no herbivory
attribute	treatment_grazing	long_name	String	Treatment Grazing
attribute	treatment_grazing	units	String	unitless
variable	urchin_diameter_mm		byte
attribute	urchin_diameter_mm	_FillValue	byte	127
attribute	urchin_diameter_mm	actual_range	byte	43, 64
attribute	urchin_diameter_mm	bcodmo_name	String	diameter
attribute	urchin_diameter_mm	description	String	size (test diameter) of sea urchin
attribute	urchin_diameter_mm	long_name	String	Urchin Diameter Mm
attribute	urchin_diameter_mm	units	String	millimeters
variable	cca_surface_area_cm2		float
attribute	cca_surface_area_cm2	_FillValue	float	NaN
attribute	cca_surface_area_cm2	actual_range	float	5.15, 38.14
attribute	cca_surface_area_cm2	bcodmo_name	String	surface_area
attribute	cca_surface_area_cm2	description	String	surface area of coralline alga
attribute	cca_surface_area_cm2	long_name	String	Cca Surface Area Cm2
attribute	cca_surface_area_cm2	units	String	square centimeters (cm^2)
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.4527296E9, 1.452816E9
attribute	time	axis	String	T
attribute	time	bcodmo_name	String	date
attribute	time	description	String	date of sampling at timepoint T0; formatted as yyyy-mm-dd
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Date T0
attribute	time	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	time	source_name	String	date_T0
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	time_precision	String	1970-01-01
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z
variable	sampling_time_T0		String
attribute	sampling_time_T0	bcodmo_name	String	time
attribute	sampling_time_T0	description	String	time of sampling (24 hr clock) (HH:MM)
attribute	sampling_time_T0	long_name	String	Sampling Time T0
attribute	sampling_time_T0	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/AHMSAA01/
attribute	sampling_time_T0	units	String	unitless
variable	standard_ave_grams_T0		float
attribute	standard_ave_grams_T0	_FillValue	float	NaN
attribute	standard_ave_grams_T0	actual_range	float	4.6, 4.603
attribute	standard_ave_grams_T0	bcodmo_name	String	mass
attribute	standard_ave_grams_T0	description	String	average mass of experimental standard at time point x
attribute	standard_ave_grams_T0	long_name	String	Standard Ave Grams T0
attribute	standard_ave_grams_T0	units	String	grams
variable	sample_mass_grams_T0		float
attribute	sample_mass_grams_T0	_FillValue	float	NaN
attribute	sample_mass_grams_T0	actual_range	float	1.599, 22.702
attribute	sample_mass_grams_T0	bcodmo_name	String	mass
attribute	sample_mass_grams_T0	description	String	average mass of coralline alga at time x
attribute	sample_mass_grams_T0	long_name	String	Sample Mass Grams T0
attribute	sample_mass_grams_T0	units	String	grams
variable	date_T5		String
attribute	date_T5	bcodmo_name	String	date
attribute	date_T5	description	String	date of sampling; formatted as yyyy-mm-dd
attribute	date_T5	long_name	String	Date T5
attribute	date_T5	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	date_T5	time_precision	String	1970-01-01
attribute	date_T5	units	String	unitless
variable	sampling_time_T5		String
attribute	sampling_time_T5	bcodmo_name	String	time
attribute	sampling_time_T5	description	String	time of sampling (24 hr clock) (HH:MM)
attribute	sampling_time_T5	long_name	String	Sampling Time T5
attribute	sampling_time_T5	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/AHMSAA01/
attribute	sampling_time_T5	units	String	unitless
variable	duration_days_T5		float
attribute	duration_days_T5	_FillValue	float	NaN
attribute	duration_days_T5	actual_range	float	4.92, 5.05
attribute	duration_days_T5	bcodmo_name	String	duration
attribute	duration_days_T5	description	String	duration of assay at timepoint T0
attribute	duration_days_T5	long_name	String	Duration Days T5
attribute	duration_days_T5	units	String	days
variable	standard_ave_grams_T5		float
attribute	standard_ave_grams_T5	_FillValue	float	NaN
attribute	standard_ave_grams_T5	actual_range	float	4.599, 4.602
attribute	standard_ave_grams_T5	bcodmo_name	String	mass
attribute	standard_ave_grams_T5	description	String	average mass of eT0perimental standard at time point T0
attribute	standard_ave_grams_T5	long_name	String	Standard Ave Grams T5
attribute	standard_ave_grams_T5	units	String	grams
variable	sample_mass_grams_T5		float
attribute	sample_mass_grams_T5	_FillValue	float	NaN
attribute	sample_mass_grams_T5	actual_range	float	1.521, 22.71
attribute	sample_mass_grams_T5	bcodmo_name	String	mass
attribute	sample_mass_grams_T5	description	String	average mass of coralline alga at time T0
attribute	sample_mass_grams_T5	long_name	String	Sample Mass Grams T5
attribute	sample_mass_grams_T5	units	String	grams
variable	correction_factor_T5		float
attribute	correction_factor_T5	_FillValue	float	NaN
attribute	correction_factor_T5	actual_range	float	0.987, 1.021
attribute	correction_factor_T5	bcodmo_name	String	unknown
attribute	correction_factor_T5	description	String	correction factor; computed by dividing the final mass of the control alga (at time T0) by its initial mass (at time T0)
attribute	correction_factor_T5	long_name	String	Correction Factor T5
attribute	correction_factor_T5	units	String	unitless
variable	ave_correction_factor_T5		float
attribute	ave_correction_factor_T5	_FillValue	float	NaN
attribute	ave_correction_factor_T5	actual_range	float	0.998, 1.008
attribute	ave_correction_factor_T5	bcodmo_name	String	unknown
attribute	ave_correction_factor_T5	description	String	the average correction factor computed for all control coralline algae in a given tank at time T0
attribute	ave_correction_factor_T5	long_name	String	Ave Correction Factor T5
attribute	ave_correction_factor_T5	units	String	unitless
variable	corrected_initial_mass_grams_T5		float
attribute	corrected_initial_mass_grams_T5	_FillValue	float	NaN
attribute	corrected_initial_mass_grams_T5	actual_range	float	1.604, 8.929
attribute	corrected_initial_mass_grams_T5	bcodmo_name	String	mass
attribute	corrected_initial_mass_grams_T5	description	String	sample.mass.grams.T0 * ave.correction.factor.T0
attribute	corrected_initial_mass_grams_T5	long_name	String	Corrected Initial Mass Grams T5
attribute	corrected_initial_mass_grams_T5	units	String	grams
variable	amount_mg_consumed_T5		float
attribute	amount_mg_consumed_T5	_FillValue	float	NaN
attribute	amount_mg_consumed_T5	actual_range	float	12.811, 415.569
attribute	amount_mg_consumed_T5	bcodmo_name	String	unknown
attribute	amount_mg_consumed_T5	description	String	the total amount of coralline algae consumed by a sea urchin at time T0; computed by subtracting sample.mass.grams.T0 from corrected.initial.mass.grams.T0; then * 1000
attribute	amount_mg_consumed_T5	long_name	String	Amount Mg Consumed T5
attribute	amount_mg_consumed_T5	units	String	milligrams
variable	amount_mg_consumed_day_T5		float
attribute	amount_mg_consumed_day_T5	_FillValue	float	NaN
attribute	amount_mg_consumed_day_T5	actual_range	float	2.595, 83.287
attribute	amount_mg_consumed_day_T5	bcodmo_name	String	unknown
attribute	amount_mg_consumed_day_T5	description	String	rate of algal consumption (per day); computed by dividing amount.mg.consumed.T0 by duration.days
attribute	amount_mg_consumed_day_T5	long_name	String	Amount Mg Consumed Day T5
attribute	amount_mg_consumed_day_T5	units	String	milligrams
variable	amount_mg_consumed_cm2_day_T5		float
attribute	amount_mg_consumed_cm2_day_T5	_FillValue	float	NaN
attribute	amount_mg_consumed_cm2_day_T5	actual_range	float	0.176, 6.81
attribute	amount_mg_consumed_cm2_day_T5	bcodmo_name	String	unknown
attribute	amount_mg_consumed_cm2_day_T5	description	String	rate of algal consumption (per day); standardized by the surface area of the coralline alga (using cca.surface.area.cm^2)
attribute	amount_mg_consumed_cm2_day_T5	long_name	String	Amount Mg Consumed Cm2 Day T5
attribute	amount_mg_consumed_cm2_day_T5	units	String	milligrams
variable	date_10		String
attribute	date_10	bcodmo_name	String	date
attribute	date_10	description	String	date of sampling at timepoint T5; formatted as yyyy-mm-dd
attribute	date_10	long_name	String	Date 10
attribute	date_10	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	date_10	time_precision	String	1970-01-01
attribute	date_10	units	String	unitless
variable	sampling_time_10		String
attribute	sampling_time_10	bcodmo_name	String	time
attribute	sampling_time_10	description	String	time of sampling (24 hr clock) (HH:MM)
attribute	sampling_time_10	long_name	String	Sampling Time 10
attribute	sampling_time_10	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/AHMSAA01/
attribute	sampling_time_10	units	String	unitless
variable	duration_days_10		float
attribute	duration_days_10	_FillValue	float	NaN
attribute	duration_days_10	actual_range	float	10.11, 10.78
attribute	duration_days_10	bcodmo_name	String	duration
attribute	duration_days_10	description	String	duration of assay at timepoint T10
attribute	duration_days_10	long_name	String	Duration Days 10
attribute	duration_days_10	units	String	days
variable	standard_ave_grams_T10		float
attribute	standard_ave_grams_T10	_FillValue	float	NaN
attribute	standard_ave_grams_T10	actual_range	float	4.599, 4.603
attribute	standard_ave_grams_T10	bcodmo_name	String	mass
attribute	standard_ave_grams_T10	description	String	average mass of eT10perimental standard at time point T10
attribute	standard_ave_grams_T10	long_name	String	Standard Ave Grams T10
attribute	standard_ave_grams_T10	units	String	grams
variable	sample_mass_grams_T10		float
attribute	sample_mass_grams_T10	_FillValue	float	NaN
attribute	sample_mass_grams_T10	actual_range	float	1.413, 22.802
attribute	sample_mass_grams_T10	bcodmo_name	String	mass
attribute	sample_mass_grams_T10	description	String	average mass of coralline alga at time T10
attribute	sample_mass_grams_T10	long_name	String	Sample Mass Grams T10
attribute	sample_mass_grams_T10	units	String	grams
variable	correction_factor_T10		float
attribute	correction_factor_T10	_FillValue	float	NaN
attribute	correction_factor_T10	actual_range	float	0.908, 1.144
attribute	correction_factor_T10	bcodmo_name	String	unknown
attribute	correction_factor_T10	description	String	correction factor; computed by dividing the final mass of the control alga (at time T10) by its initial mass (at time T0)
attribute	correction_factor_T10	long_name	String	Correction Factor T10
attribute	correction_factor_T10	units	String	unitless
variable	ave_correction_factor_T10		float
attribute	ave_correction_factor_T10	_FillValue	float	NaN
attribute	ave_correction_factor_T10	actual_range	float	1.0, 1.02
attribute	ave_correction_factor_T10	bcodmo_name	String	unknown
attribute	ave_correction_factor_T10	description	String	the average correction factor computed for all control coralline algae in a given tank at time T10
attribute	ave_correction_factor_T10	long_name	String	Ave Correction Factor T10
attribute	ave_correction_factor_T10	units	String	unitless
variable	corrected_initial_mass_grams_T10		float
attribute	corrected_initial_mass_grams_T10	_FillValue	float	NaN
attribute	corrected_initial_mass_grams_T10	actual_range	float	1.613, 8.931
attribute	corrected_initial_mass_grams_T10	bcodmo_name	String	mass
attribute	corrected_initial_mass_grams_T10	description	String	sample.mass.grams.T0 * ave.correction.factor.T10
attribute	corrected_initial_mass_grams_T10	long_name	String	Corrected Initial Mass Grams T10
attribute	corrected_initial_mass_grams_T10	units	String	grams
variable	amount_mg_consumed_T10		float
attribute	amount_mg_consumed_T10	_FillValue	float	NaN
attribute	amount_mg_consumed_T10	actual_range	float	43.594, 636.11
attribute	amount_mg_consumed_T10	bcodmo_name	String	unknown
attribute	amount_mg_consumed_T10	description	String	the total amount of coralline algae consumed by a sea urchin at time T10; computed by subtracting sample.mass.grams.T10 from corrected.initial.mass.grams.T10; then * 1000
attribute	amount_mg_consumed_T10	long_name	String	Amount Mg Consumed T10
attribute	amount_mg_consumed_T10	units	String	milligrams
variable	amount_mg_consumed_day_T10		float
attribute	amount_mg_consumed_day_T10	_FillValue	float	NaN
attribute	amount_mg_consumed_day_T10	actual_range	float	4.055, 62.42
attribute	amount_mg_consumed_day_T10	bcodmo_name	String	unknown
attribute	amount_mg_consumed_day_T10	description	String	rate of algal consumption (per day); computed by dividing amount.mg.consumed.T10 by duration.days
attribute	amount_mg_consumed_day_T10	long_name	String	Amount Mg Consumed Day T10
attribute	amount_mg_consumed_day_T10	units	String	milligrams
variable	amount_mg_consumed_cm2_day_T10		float
attribute	amount_mg_consumed_cm2_day_T10	_FillValue	float	NaN
attribute	amount_mg_consumed_cm2_day_T10	actual_range	float	0.333, 5.33
attribute	amount_mg_consumed_cm2_day_T10	bcodmo_name	String	unknown
attribute	amount_mg_consumed_cm2_day_T10	description	String	rate of algal consumption (per day); standardized by the surface area of the coralline alga (using cca.surface.area.cm^2)
attribute	amount_mg_consumed_cm2_day_T10	long_name	String	Amount Mg Consumed Cm2 Day T10
attribute	amount_mg_consumed_cm2_day_T10	units	String	milligrams
variable	date_T15		String
attribute	date_T15	bcodmo_name	String	date
attribute	date_T15	description	String	date of sampling at timepoint T15; formatted as yyyy-mm-dd
attribute	date_T15	long_name	String	Date T15
attribute	date_T15	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	date_T15	time_precision	String	1970-01-01
attribute	date_T15	units	String	unitless
variable	sampling_time_T15		String
attribute	sampling_time_T15	bcodmo_name	String	time
attribute	sampling_time_T15	description	String	time of sampling (24 hr clock) (HH:MM)
attribute	sampling_time_T15	long_name	String	Sampling Time T15
attribute	sampling_time_T15	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/AHMSAA01/
attribute	sampling_time_T15	units	String	unitless
variable	duration_days_T15		float
attribute	duration_days_T15	_FillValue	float	NaN
attribute	duration_days_T15	actual_range	float	14.13, 14.78
attribute	duration_days_T15	bcodmo_name	String	duration
attribute	duration_days_T15	description	String	duration of assay at timepoint T15
attribute	duration_days_T15	long_name	String	Duration Days T15
attribute	duration_days_T15	units	String	days
variable	standard_ave_grams_T15		float
attribute	standard_ave_grams_T15	_FillValue	float	NaN
attribute	standard_ave_grams_T15	actual_range	float	4.597, 4.6
attribute	standard_ave_grams_T15	bcodmo_name	String	mass
attribute	standard_ave_grams_T15	description	String	average mass of eT15perimental standard at time point T15
attribute	standard_ave_grams_T15	long_name	String	Standard Ave Grams T15
attribute	standard_ave_grams_T15	units	String	grams
variable	sample_mass_grams_T15		float
attribute	sample_mass_grams_T15	_FillValue	float	NaN
attribute	sample_mass_grams_T15	actual_range	float	1.351, 22.874
attribute	sample_mass_grams_T15	bcodmo_name	String	mass
attribute	sample_mass_grams_T15	description	String	average mass of coralline alga at time T15
attribute	sample_mass_grams_T15	long_name	String	Sample Mass Grams T15
attribute	sample_mass_grams_T15	units	String	grams
variable	correction_factor_T15		float
attribute	correction_factor_T15	_FillValue	float	NaN
attribute	correction_factor_T15	actual_range	float	0.988, 1.031
attribute	correction_factor_T15	bcodmo_name	String	unknown
attribute	correction_factor_T15	description	String	correction factor; computed by dividing the final mass of the control alga (at time T15) by its initial mass (at time T0)
attribute	correction_factor_T15	long_name	String	Correction Factor T15
attribute	correction_factor_T15	units	String	unitless
variable	ave_correction_factor_T15		float
attribute	ave_correction_factor_T15	_FillValue	float	NaN
attribute	ave_correction_factor_T15	actual_range	float	1.0, 1.017
attribute	ave_correction_factor_T15	bcodmo_name	String	unknown
attribute	ave_correction_factor_T15	description	String	the average correction factor computed for all control coralline algae in a given tank at time T15
attribute	ave_correction_factor_T15	long_name	String	Ave Correction Factor T15
attribute	ave_correction_factor_T15	units	String	unitless
variable	corrected_initial_mass_grams_T15		float
attribute	corrected_initial_mass_grams_T15	_FillValue	float	NaN
attribute	corrected_initial_mass_grams_T15	actual_range	float	1.615, 8.935
attribute	corrected_initial_mass_grams_T15	bcodmo_name	String	mass
attribute	corrected_initial_mass_grams_T15	description	String	sample.mass.grams.T0 * ave.correction.factor.T15
attribute	corrected_initial_mass_grams_T15	long_name	String	Corrected Initial Mass Grams T15
attribute	corrected_initial_mass_grams_T15	units	String	grams
variable	amount_mg_consumed_T15		float
attribute	amount_mg_consumed_T15	_FillValue	float	NaN
attribute	amount_mg_consumed_T15	actual_range	float	59.088, 800.349
attribute	amount_mg_consumed_T15	bcodmo_name	String	unknown
attribute	amount_mg_consumed_T15	description	String	the total amount of coralline algae consumed by a sea urchin at time T15; computed by subtracting sample.mass.grams.T15 from corrected.initial.mass.grams.T15; then * 1000
attribute	amount_mg_consumed_T15	long_name	String	Amount Mg Consumed T15
attribute	amount_mg_consumed_T15	units	String	milligrams
variable	amount_mg_consumed_day_T15		float
attribute	amount_mg_consumed_day_T15	_FillValue	float	NaN
attribute	amount_mg_consumed_day_T15	actual_range	float	4.012, 56.44
attribute	amount_mg_consumed_day_T15	bcodmo_name	String	unknown
attribute	amount_mg_consumed_day_T15	description	String	rate of algal consumption (per day); computed by dividing amount.mg.consumed.T15 by duration.days
attribute	amount_mg_consumed_day_T15	long_name	String	Amount Mg Consumed Day T15
attribute	amount_mg_consumed_day_T15	units	String	milligrams
variable	amount_mg_consumed_cm2_day_T15		float
attribute	amount_mg_consumed_cm2_day_T15	_FillValue	float	NaN
attribute	amount_mg_consumed_cm2_day_T15	actual_range	float	0.312, 4.441
attribute	amount_mg_consumed_cm2_day_T15	bcodmo_name	String	unknown
attribute	amount_mg_consumed_cm2_day_T15	description	String	rate of algal consumption (per day); standardized by the surface area of the coralline alga (using cca.surface.area.cm^2)
attribute	amount_mg_consumed_cm2_day_T15	long_name	String	Amount Mg Consumed Cm2 Day T15
attribute	amount_mg_consumed_cm2_day_T15	units	String	milligrams
variable	date_T20		String
attribute	date_T20	bcodmo_name	String	date
attribute	date_T20	description	String	date of sampling at timepoint T20; formatted as yyyy-mm-dd
attribute	date_T20	long_name	String	Date T20
attribute	date_T20	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/
attribute	date_T20	time_precision	String	1970-01-01
attribute	date_T20	units	String	unitless
variable	sampling_time_T20		String
attribute	sampling_time_T20	bcodmo_name	String	time
attribute	sampling_time_T20	description	String	time of sampling (24 hr clock) (HH:MM)
attribute	sampling_time_T20	long_name	String	Sampling Time T20
attribute	sampling_time_T20	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/AHMSAA01/
attribute	sampling_time_T20	units	String	unitless
variable	duration_days_T20		float
attribute	duration_days_T20	_FillValue	float	NaN
attribute	duration_days_T20	actual_range	float	19.81, 20.01
attribute	duration_days_T20	bcodmo_name	String	duration
attribute	duration_days_T20	description	String	duration of assay at timepoint T20
attribute	duration_days_T20	long_name	String	Duration Days T20
attribute	duration_days_T20	units	String	days
variable	standard_ave_grams_T20		float
attribute	standard_ave_grams_T20	_FillValue	float	NaN
attribute	standard_ave_grams_T20	actual_range	float	4.597, 4.601
attribute	standard_ave_grams_T20	bcodmo_name	String	mass
attribute	standard_ave_grams_T20	description	String	average mass of eT20perimental standard at time point T20
attribute	standard_ave_grams_T20	long_name	String	Standard Ave Grams T20
attribute	standard_ave_grams_T20	units	String	grams
variable	sample_mass_grams_T20		float
attribute	sample_mass_grams_T20	_FillValue	float	NaN
attribute	sample_mass_grams_T20	actual_range	float	1.316, 22.902
attribute	sample_mass_grams_T20	bcodmo_name	String	mass
attribute	sample_mass_grams_T20	description	String	average mass of coralline alga at time T20
attribute	sample_mass_grams_T20	long_name	String	Sample Mass Grams T20
attribute	sample_mass_grams_T20	units	String	grams
variable	correction_factor_T20		float
attribute	correction_factor_T20	_FillValue	float	NaN
attribute	correction_factor_T20	actual_range	float	0.995, 1.034
attribute	correction_factor_T20	bcodmo_name	String	unknown
attribute	correction_factor_T20	description	String	correction factor; computed by dividing the final mass of the control alga (at time T20) by its initial mass (at time T0)
attribute	correction_factor_T20	long_name	String	Correction Factor T20
attribute	correction_factor_T20	units	String	unitless
variable	ave_correction_factor_T20		float
attribute	ave_correction_factor_T20	_FillValue	float	NaN
attribute	ave_correction_factor_T20	actual_range	float	1.004, 1.02
attribute	ave_correction_factor_T20	bcodmo_name	String	unknown
attribute	ave_correction_factor_T20	description	String	the average correction factor computed for all control coralline algae in a given tank at time T20
attribute	ave_correction_factor_T20	long_name	String	Ave Correction Factor T20
attribute	ave_correction_factor_T20	units	String	unitless
variable	corrected_initial_mass_grams_T20		float
attribute	corrected_initial_mass_grams_T20	_FillValue	float	NaN
attribute	corrected_initial_mass_grams_T20	actual_range	float	1.619, 8.97
attribute	corrected_initial_mass_grams_T20	bcodmo_name	String	mass
attribute	corrected_initial_mass_grams_T20	description	String	sample.mass.grams.T0 * ave.correction.factor.T20
attribute	corrected_initial_mass_grams_T20	long_name	String	Corrected Initial Mass Grams T20
attribute	corrected_initial_mass_grams_T20	units	String	grams
variable	amount_mg_consumed_T20		float
attribute	amount_mg_consumed_T20	_FillValue	float	NaN
attribute	amount_mg_consumed_T20	actual_range	float	80.38, 1045.949
attribute	amount_mg_consumed_T20	bcodmo_name	String	unknown
attribute	amount_mg_consumed_T20	description	String	the total amount of coralline algae consumed by a sea urchin at time T20; computed by subtracting sample.mass.grams.T20 from corrected.initial.mass.grams.T20; then * 1000
attribute	amount_mg_consumed_T20	long_name	String	Amount Mg Consumed T20
attribute	amount_mg_consumed_T20	units	String	milligrams
variable	amount_mg_consumed_day_T20		float
attribute	amount_mg_consumed_day_T20	_FillValue	float	NaN
attribute	amount_mg_consumed_day_T20	actual_range	float	4.044, 52.343
attribute	amount_mg_consumed_day_T20	bcodmo_name	String	unknown
attribute	amount_mg_consumed_day_T20	description	String	rate of algal consumption (per day); computed by dividing amount.mg.consumed.T20 by duration.days
attribute	amount_mg_consumed_day_T20	long_name	String	Amount Mg Consumed Day T20
attribute	amount_mg_consumed_day_T20	units	String	milligrams
variable	amount_mg_consumed_cm2_day_T20		float
attribute	amount_mg_consumed_cm2_day_T20	_FillValue	float	NaN
attribute	amount_mg_consumed_cm2_day_T20	actual_range	float	0.345, 4.232
attribute	amount_mg_consumed_cm2_day_T20	bcodmo_name	String	unknown
attribute	amount_mg_consumed_cm2_day_T20	description	String	rate of algal consumption (per day); standardized by the surface area of the coralline alga (using cca.surface.area.cm^2)
attribute	amount_mg_consumed_cm2_day_T20	long_name	String	Amount Mg Consumed Cm2 Day T20
attribute	amount_mg_consumed_cm2_day_T20	units	String	milligrams

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.