ERDDAP > info > IsotopicNicheWAPFoodWebComponents

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
	set	data	graph		files	Isotopic signatures of penguin food-web components along the western Antarctic Peninsula, 2009-2011		M	background			National Science ...	IsotopicNicheWAPFoodWebComponents

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	acknowledgement	String	Funding and support provided by the National Science Foundation
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	The Palmer, Antarctica, Long-Term Ecological Research project is a member site of the Long-Term Ecological Research program, a network of sites investigating diverse biomes. A team of researchers seeks to understand the structure and function of the Western Antarctic Peninsula's marine and terrestrial ecosystems in the context of seasonal-to-interannual atmospheric and sea ice dynamics, as well as long-term climate change. The PAL measurement system (or grid) is designed to study marine and terrestrial food webs consisting principally of diatom primary producers, the dominant herbivore Antarctic krill, and the apex predator Adelie penguin. An attenuated microbial food web is also a focus. PAL studies these ecosystems annually over a regional scale grid of oceanographic stations and seasonally at Palmer Station. \n\nPalmer Station is located on Anvers Island west of the Antarctic Peninula. The peninsula runs perpendicular to a strong climatic gradient between the cold, dry continental regime to the south, characteristic of the Antarctic interior, and the warm, moist, maritime regime to the north. North-south shifts in the gradient give rise to large environmental variability to climate change. Sea ice extent and variability affects ecosystem changes at all trophic levels. In addition to the long-term field and research activities, information management, graduate student training, education and outreach are an integral part of the program.
attribute	NC_GLOBAL	contributor_email	String	kgorman at sfu.ca
attribute	NC_GLOBAL	contributor_name	String	Kristen Gorman
attribute	NC_GLOBAL	contributor_role	String	PrincipalInvestigator
attribute	NC_GLOBAL	contributor_role_vocabulary	String	https://vocab.nerc.ac.uk/collection/G04/current/
attribute	NC_GLOBAL	Conventions	String	CF-1.8, ACDD-1.3, COARDS
attribute	NC_GLOBAL	creator_country	String	USA
attribute	NC_GLOBAL	creator_email	String	kerfoot at marine.rutgers.edu
attribute	NC_GLOBAL	creator_institution	String	Rutgers University
attribute	NC_GLOBAL	creator_name	String	John Kerfoot
attribute	NC_GLOBAL	creator_sector	String	academic
attribute	NC_GLOBAL	creator_type	String	person
attribute	NC_GLOBAL	creator_url	String	https://rucool.marine.rutgers.edu
attribute	NC_GLOBAL	datazoo_dataset_id	String	227
attribute	NC_GLOBAL	datazoo_datatable_id	String	227
attribute	NC_GLOBAL	datazoo_datatable_label	String	Isotopic niche - WAP food-web components
attribute	NC_GLOBAL	datazoo_datatable_name	String	IsotopicnicheWAPfoodwebcomponents
attribute	NC_GLOBAL	date_created	String	2022-03-16T01:15:54Z
attribute	NC_GLOBAL	date_issued	String	2022-03-16T01:15:54Z
attribute	NC_GLOBAL	defaultDataQuery	String	null
attribute	NC_GLOBAL	defaultGraphQuery	String	time%2Cratio_of_13c_to_12c%2C&.draw=markers&.marker=6%7C5&.color=0x000000&.colorBar=%7C%7C%7C%7C%7C&.bgColor=0xffccccff
attribute	NC_GLOBAL	geospatial_bounds_crs	String	EPSG:4326
attribute	NC_GLOBAL	geospatial_bounds_vertical_crs	String	EPSG:5831
attribute	NC_GLOBAL	geospatial_lat_resolution	String	0.00001 degree
attribute	NC_GLOBAL	geospatial_lat_units	String	degree_north
attribute	NC_GLOBAL	geospatial_lon_resolution	String	0.00001 degree
attribute	NC_GLOBAL	geospatial_lon_units	String	degree_east
attribute	NC_GLOBAL	geospatial_vertical_positive	String	down
attribute	NC_GLOBAL	geospatial_vertical_units	String	EPSG:5831
attribute	NC_GLOBAL	history	String	/Users/kerfoot/data/lter/data/tsv/dat_227/dat_227_LMG11-01.tsv
attribute	NC_GLOBAL	infoUrl	String	https://pal.lternet.edu/
attribute	NC_GLOBAL	institution	String	National Science Foundation
attribute	NC_GLOBAL	keywords	String	biology, birds, isotopes
attribute	NC_GLOBAL	keywords_vocabulary	String	LTER Controlled Vocabulary
attribute	NC_GLOBAL	license	String	All data contained herein is licensed under the LTER Network Data Access Policy (https://lternet.edu/data-access-policy/). In accordance with scientific publishing conventions and professional etiquette, the consumer of these data (the "Data User") is expected to appropriately cite these data in any publication that results from their use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur and should realize that misinterpretation of data may occur if used out of context of the original study. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the data authors. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data.
attribute	NC_GLOBAL	license_link	String	https://lternet.edu/data-access-policy/
attribute	NC_GLOBAL	methods	String	General Methods: Food-web samples were collected during PAL-LTER oceanographic cruises. Phyotplankton samples were collected by filtering continuous flow surface seawater onto glass fiber filters. Zooplankton were sampled using oblique tows of 1x1 m-square-frame net (300 μm 1 mesh) towed to a depth of approximately 300 m or a 2x2 m-square-frame net (700 μm mesh) towed to a depth of 3 approximately 120 m.\n\nNotes: Data presented here are raw data only and do not include any derived data products.\t\t
attribute	NC_GLOBAL	naming_authority	String	edu.rutgers.rucool
attribute	NC_GLOBAL	product_version	String	1.0
attribute	NC_GLOBAL	program	String	LTER
attribute	NC_GLOBAL	project	String	Palmer LTER
attribute	NC_GLOBAL	publisher_country	String	USA
attribute	NC_GLOBAL	publisher_email	String	kerfoot at marine.rutgers.edu
attribute	NC_GLOBAL	publisher_institution	String	Rutgers University
attribute	NC_GLOBAL	publisher_name	String	John Kerfoot
attribute	NC_GLOBAL	publisher_type	String	person
attribute	NC_GLOBAL	publisher_url	String	https://rucool.marine.rutgers.edu
attribute	NC_GLOBAL	references	String	https://pal.lternet.edu/
attribute	NC_GLOBAL	sea_name	String	Southern Ocean
attribute	NC_GLOBAL	source	String	/Users/kerfoot/data/lter/data/tsv/dat_227/dat_227_LMG11-01.tsv
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v77
attribute	NC_GLOBAL	subsetVariables	String	study_name, species
attribute	NC_GLOBAL	summary	String	We evaluated regional variation in reproductive isotopic niche among breeding populations of Adélie (Pygoscelis adeliae), chinstrap (P. antarctica), and gentoo (P. papua) penguins west of the Antarctic Peninsula (AP) to test a hypothesis for sea ice-associated food-web correlates of breeding population change. We rely on signatures of naturally occurring carbon (13C/12C, δ13C) and nitrogen (15N/14N, δ15N) stable isotopes (SI) as integrated proxies of penguin trophic foraging and food-web structure. Each season, study nests, where pairs of adults were present, were individually marked and chosen before the onset of egg-laying, and consistently monitored. When study nests were found at the one-egg stage, both adults were captured to obtain blood samples used for molecular sexing and stable isotope analyses, and measurements of structural size and body mass. At the time of capture, each adult penguin was quickly blood sampled (~1 ml) from the brachial vein. After handling, individuals at study nests were further monitored to ensure the pair reached clutch completion, i.e., two eggs. At approximate an average nest age of five and 15 days, offspring from study nests were captured and quickly blood sampled (<= ~500 µl for day five chicks, and <= ~1 ml for day 15 chicks) from the tarsus vein using a sterile needle and heparinized capillary tubes for day five chicks, and a sterile 3 ml syringe and heparinized infusion needle for day 15 chicks, again to obtain blood tissue for SI analyses. Study nests were monitored for chick survival to 25 days. At five weeks into chick-rearing, older crèched chicks of all three species were captured and quickly blood sampled from study rookeries near Anvers Island. Handling of crèched chicks occurred over a one or two day period, which varied seasonally and by species depending on nest initiation dates. Adélie penguin chicks at Avian Island were sampled on the same day Anvers Island Adélie penguin chicks were sampled. Adélie penguin chicks at Charcot Island, sampled during one season only on 25 January 2010, were handled three days after Anvers Island and Avian Island Adélie penguin chicks were sampled that year, i.e., 22 January 2010. Blood samples from crèched chicks (~1 ml) were taken from the brachial vein using a sterile 3 ml syringe and heparinized infusion needle following sampling procedures used for adult penguins to obtain blood tissue for SI analyses. Stable isotope analyses were conducted at the Stable Isotope Facility at the University of California, Davis using an elemental analyzer interfaced with an isotope ratio mass spectrometer
attribute	NC_GLOBAL	time_coverage_end	String	2011-01-27T00:00:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2009-01-06T00:00:00Z
attribute	NC_GLOBAL	title	String	Isotopic signatures of penguin food-web components along the western Antarctic Peninsula, 2009-2011
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.2312E9, 1.2960864E9
attribute	time	axis	String	T
attribute	time	calendar	String	proleptic_gregorian
attribute	time	column_id	long	4494
attribute	time	column_name	String	col_4494
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Date
attribute	time	lter_column_description	String	Date sample was taken
attribute	time	lter_column_name	String	Sample Date
attribute	time	lter_mscale	String	dateTime
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z
variable	study_name		String
attribute	study_name	column_name	String	studyName
attribute	study_name	comment	String	Study Name
attribute	study_name	ioos_category	String	Unknown
attribute	study_name	long_name	String	Study
variable	sample_number		short
attribute	sample_number	_FillValue	short	32767
attribute	sample_number	actual_range	short	1, 230
attribute	sample_number	colorBarMaximum	double	100.0
attribute	sample_number	colorBarMinimum	double	0.0
attribute	sample_number	column_id	long	4489
attribute	sample_number	column_name	String	col_4489
attribute	sample_number	ioos_category	String	Statistics
attribute	sample_number	long_name	String	Sample Number
attribute	sample_number	lter_column_description	String	Continuous numbering sequence for each sample
attribute	sample_number	lter_column_name	String	Sample Number
attribute	sample_number	lter_mscale	String	interval
attribute	sample_number	lter_num_type	String	integer
attribute	sample_number	lter_units_string	String	number
attribute	sample_number	units_conventions	String	EML-2.0.1,EML-2.1.0,EML-LTER
variable	species_sample_number		short
attribute	species_sample_number	_FillValue	short	32767
attribute	species_sample_number	actual_range	short	1, 30
attribute	species_sample_number	colorBarMaximum	double	100.0
attribute	species_sample_number	colorBarMinimum	double	0.0
attribute	species_sample_number	column_id	long	4490
attribute	species_sample_number	column_name	String	col_4490
attribute	species_sample_number	ioos_category	String	Statistics
attribute	species_sample_number	long_name	String	Species Sample Number
attribute	species_sample_number	lter_column_description	String	Continuous numbering sequence for each sample within species by location
attribute	species_sample_number	lter_column_name	String	Sample Number (Species and Location)
attribute	species_sample_number	lter_mscale	String	interval
attribute	species_sample_number	lter_num_type	String	integer
attribute	species_sample_number	lter_units_string	String	number
attribute	species_sample_number	units_conventions	String	EML-2.0.1,EML-2.1.0,EML-LTER
variable	species		String
attribute	species	column_id	long	4491
attribute	species	column_name	String	col_4491
attribute	species	ioos_category	String	Taxonomy
attribute	species	long_name	String	Species
attribute	species	lter_column_description	String	Common and/or scientific name for the species these data represent
attribute	species	lter_column_name	String	Species
attribute	species	lter_mscale	String	nominal
variable	region		String
attribute	region	column_id	long	4492
attribute	region	column_name	String	col_4492
attribute	region	ioos_category	String	Location
attribute	region	long_name	String	Palmer Grid Region
attribute	region	lter_column_description	String	Region of PAL-LTER sampling grid
attribute	region	lter_column_name	String	Region
attribute	region	lter_mscale	String	nominal
variable	individual_id		String
attribute	individual_id	column_id	long	4493
attribute	individual_id	column_name	String	col_4493
attribute	individual_id	ioos_category	String	Identifier
attribute	individual_id	long_name	String	Individual ID
attribute	individual_id	lter_column_description	String	A unique ID for each individual in the dataset
attribute	individual_id	lter_column_name	String	Individual ID
attribute	individual_id	lter_mscale	String	nominal
variable	grid_station		String
attribute	grid_station	column_id	long	4495
attribute	grid_station	column_name	String	col_4495
attribute	grid_station	ioos_category	String	Unknown
attribute	grid_station	long_name	String	Station
attribute	grid_station	lter_column_description	String	Specific PAL-LTER sampling grid station
attribute	grid_station	lter_column_name	String	Sampling Grid Station
attribute	grid_station	lter_mscale	String	nominal
variable	ratio_of_15n_to_14n		double
attribute	ratio_of_15n_to_14n	_FillValue	double	9.969209968386869E36
attribute	ratio_of_15n_to_14n	actual_range	double	-1.31763, 13.28982
attribute	ratio_of_15n_to_14n	colorBarMaximum	double	100.0
attribute	ratio_of_15n_to_14n	colorBarMinimum	double	0.0
attribute	ratio_of_15n_to_14n	column_id	long	4496
attribute	ratio_of_15n_to_14n	column_name	String	col_4496
attribute	ratio_of_15n_to_14n	ioos_category	String	Unknown
attribute	ratio_of_15n_to_14n	long_name	String	15N:14N Ratio
attribute	ratio_of_15n_to_14n	lter_column_description	String	a measure of the ratio of stable isotopes 15N:14N
attribute	ratio_of_15n_to_14n	lter_column_name	String	Delta 15N
attribute	ratio_of_15n_to_14n	lter_mscale	String	ratio
attribute	ratio_of_15n_to_14n	lter_num_type	String	real
attribute	ratio_of_15n_to_14n	lter_units	String	o/oo
attribute	ratio_of_15n_to_14n	lter_units_string	String	permil
attribute	ratio_of_15n_to_14n	units	String	percent
attribute	ratio_of_15n_to_14n	units_conventions	String	SBC-LTER
variable	ratio_of_13c_to_12c		double
attribute	ratio_of_13c_to_12c	_FillValue	double	9.969209968386869E36
attribute	ratio_of_13c_to_12c	actual_range	double	-32.23881, -19.60395
attribute	ratio_of_13c_to_12c	colorBarMaximum	double	100.0
attribute	ratio_of_13c_to_12c	colorBarMinimum	double	0.0
attribute	ratio_of_13c_to_12c	column_id	long	4497
attribute	ratio_of_13c_to_12c	column_name	String	col_4497
attribute	ratio_of_13c_to_12c	ioos_category	String	Unknown
attribute	ratio_of_13c_to_12c	long_name	String	13C:12C Ratio
attribute	ratio_of_13c_to_12c	lter_column_description	String	a measure of the ratio of stable isotopes 13C:12C
attribute	ratio_of_13c_to_12c	lter_column_name	String	Delta 13C
attribute	ratio_of_13c_to_12c	lter_mscale	String	ratio
attribute	ratio_of_13c_to_12c	lter_num_type	String	real
attribute	ratio_of_13c_to_12c	lter_units	String	o/oo
attribute	ratio_of_13c_to_12c	lter_units_string	String	permil
attribute	ratio_of_13c_to_12c	units	String	percent
attribute	ratio_of_13c_to_12c	units_conventions	String	SBC-LTER
variable	carbon		double
attribute	carbon	_FillValue	double	NaN
attribute	carbon	actual_range	double	39.314, 1184.889
attribute	carbon	column_id	long	4498
attribute	carbon	column_name	String	col_4498
attribute	carbon	ioos_category	String	Unknown
attribute	carbon	long_name	String	Carbon
attribute	carbon	lter_column_description	String	Amount of carbon sample
attribute	carbon	lter_column_name	String	Amount C
attribute	carbon	lter_mscale	String	ratio
attribute	carbon	lter_num_type	String	real
attribute	carbon	lter_units	String	ug
attribute	carbon	lter_units_string	String	micrograms
attribute	carbon	units	String	micrograms
attribute	carbon	units_conventions	String	BNZ-LTER,MCR-LTER
variable	nitrogen		double
attribute	nitrogen	_FillValue	double	NaN
attribute	nitrogen	actual_range	double	42.056, 367.303
attribute	nitrogen	column_id	long	4499
attribute	nitrogen	column_name	String	col_4499
attribute	nitrogen	ioos_category	String	Unknown
attribute	nitrogen	long_name	String	Nitrogen
attribute	nitrogen	lter_column_description	String	Amount of nitrogen sample
attribute	nitrogen	lter_column_name	String	Amount N
attribute	nitrogen	lter_mscale	String	ratio
attribute	nitrogen	lter_num_type	String	real
attribute	nitrogen	lter_units	String	ug
attribute	nitrogen	lter_units_string	String	micrograms
attribute	nitrogen	units	String	micrograms
attribute	nitrogen	units_conventions	String	BNZ-LTER,MCR-LTER
variable	sample_mass		double
attribute	sample_mass	_FillValue	double	NaN
attribute	sample_mass	actual_range	double	0.001, 0.066
attribute	sample_mass	column_id	long	4500
attribute	sample_mass	column_name	String	col_4500
attribute	sample_mass	ioos_category	String	Unknown
attribute	sample_mass	long_name	String	Sample Mass
attribute	sample_mass	lter_column_description	String	Mass of sample
attribute	sample_mass	lter_column_name	String	Sample Mass
attribute	sample_mass	lter_mscale	String	ratio
attribute	sample_mass	lter_num_type	String	real
attribute	sample_mass	lter_units	String	g
attribute	sample_mass	lter_units_string	String	gram
attribute	sample_mass	units	String	grams
attribute	sample_mass	units_conventions	String	AND-LTER,BNZ-LTER,CDR-LTER,EML-2.0.1,EML-2.1.0,EML-LTER,LUQ-LTER,SGS-LTER
variable	c_to_n_ratio		double
attribute	c_to_n_ratio	_FillValue	double	NaN
attribute	c_to_n_ratio	actual_range	double	0.917, 4.643
attribute	c_to_n_ratio	column_id	long	4501
attribute	c_to_n_ratio	column_name	String	col_4501
attribute	c_to_n_ratio	ioos_category	String	Statistics
attribute	c_to_n_ratio	long_name	String	Carbon:Nitrogen
attribute	c_to_n_ratio	lter_column_description	String	Ratio of carbon to nitrogen in sample
attribute	c_to_n_ratio	lter_column_name	String	C/N Ratio
attribute	c_to_n_ratio	lter_mscale	String	ratio
attribute	c_to_n_ratio	lter_num_type	String	real
attribute	c_to_n_ratio	lter_units	String	num/num
attribute	c_to_n_ratio	lter_units_string	String	numberPerNumber
attribute	c_to_n_ratio	units_conventions	String	CCE-LTER
variable	percent_carbon		double
attribute	percent_carbon	_FillValue	double	9.969209968386869E36
attribute	percent_carbon	actual_range	double	10.569, 49.744
attribute	percent_carbon	colorBarMaximum	double	100.0
attribute	percent_carbon	colorBarMinimum	double	0.0
attribute	percent_carbon	column_id	long	4502
attribute	percent_carbon	column_name	String	col_4502
attribute	percent_carbon	ioos_category	String	Unknown
attribute	percent_carbon	long_name	String	% Carbon in Sample
attribute	percent_carbon	lter_column_description	String	Percent of carbon in sample accounting for sample mass
attribute	percent_carbon	lter_column_name	String	% C
attribute	percent_carbon	lter_mscale	String	ratio
attribute	percent_carbon	lter_num_type	String	real
attribute	percent_carbon	lter_units	String	%
attribute	percent_carbon	lter_units_string	String	percent
attribute	percent_carbon	units	String	percent
attribute	percent_carbon	units_conventions	String	BNZ-LTER,CAP-LTER,CDR-LTER,FCE-LTER,GCE-LTER,HBR-LTER,KNZ-LTER,MCM-LTER,NTL-LTER,NWT-LTER,PAL-LTER,PIE-LTER,SGS-LTER
variable	percent_nitrogen		double
attribute	percent_nitrogen	_FillValue	double	9.969209968386869E36
attribute	percent_nitrogen	actual_range	double	3.141, 15.649
attribute	percent_nitrogen	colorBarMaximum	double	100.0
attribute	percent_nitrogen	colorBarMinimum	double	0.0
attribute	percent_nitrogen	column_id	long	4503
attribute	percent_nitrogen	column_name	String	col_4503
attribute	percent_nitrogen	ioos_category	String	Unknown
attribute	percent_nitrogen	long_name	String	% Nitrogen in Sample
attribute	percent_nitrogen	lter_column_description	String	Percent of nitrogen in sample accounting for sample mass
attribute	percent_nitrogen	lter_column_name	String	% N
attribute	percent_nitrogen	lter_mscale	String	ratio
attribute	percent_nitrogen	lter_num_type	String	real
attribute	percent_nitrogen	lter_units	String	%
attribute	percent_nitrogen	lter_units_string	String	percent
attribute	percent_nitrogen	units	String	percent
attribute	percent_nitrogen	units_conventions	String	BNZ-LTER,CAP-LTER,CDR-LTER,FCE-LTER,GCE-LTER,HBR-LTER,KNZ-LTER,MCM-LTER,NTL-LTER,NWT-LTER,PAL-LTER,PIE-LTER,SGS-LTER
variable	comments		double
attribute	comments	_FillValue	double	NaN
attribute	comments	column_id	long	4504
attribute	comments	column_name	String	col_4504
attribute	comments	ioos_category	String	Unknown
attribute	comments	long_name	String	Notes
attribute	comments	lter_column_description	String	Text field to provide additional relevant information for data
attribute	comments	lter_column_name	String	Comments
attribute	comments	lter_mscale	String	nominal
attribute	comments	missing_value	double	NaN

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.