ERDDAP > info > bcodmo_dataset_714252

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
	set	data	graph		files	public	Relative predation intensity within temperate seagrass habitat during June 2015 (Habitat_ Fragmentation project)		I   M	background			BCO-DMO	bcodmo_dataset_714252

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,.esriCsv,.geoJson
attribute	NC_GLOBAL	acquisition_description	String	We utilized tethering trials as a proxy of predator-driven mortality of blue crabs and pinfish within edge and interior regions of the seagrass meadow at Jack\u2019s Island. Our design consisted of 21 \"edge\" (0-1 m from seagrass- sandflat boundary) and 21 \"interior\"(>3 m from seagrass-sandflat boundary) plots, with each plot defined by two 1x1-m subplots separated from each other by 0.5 m (but with the entirety of each plot being at the suitable distance for edge/interior designations). Each of the 42 total plots were separated from one another by >2 m. For both the edge and interior treatments, seagrass shoot density was reduced by 50% in a third of the plots, seagrass shoot density was reduced by 80% in another third of the plots, and seagrass shoot density was left at ambient in the final third of plots (all randomly assigned). This resulted in a 2x3 experimental design in which meadow location and shoot density were fully crossed. Reduction of shoot densities was achieved by deploying a 1x1-m quadrant with a 10x10 grid (with each grid cell = 0.01 m2). We then removed all seagrass in 50 or 80 of the cells for the 50% and 80% reduction treatments, respectively. The resultant shoot densities were as follows: ambient treatments had a mean of 575 shoots m-2, 50% reduction treatments had a mean of 283 shoots m-2, and 80% reduction treatments had a mean of 124 shoots m-2. We deployed 126 tethered blue crabs (5.2 \u00b1 0.1 cm carapace width) and 168 tethered pinfish (5.1 \u00b1 0.1 cm total length) in plots over three and four trials, respectively. We ran one less trial with blue crabs due to the availability of specimens within our preferred size range during our experimental window. All crabs and pinfish were collected via small trawl on the day before deployment. During each trial, a tethered blue crab was randomly assigned to one of the subplots within each plot, while a tethered pinfish was placed in the remaining subplot (i.e., 42 juvenile blue crabs and 42 pinfish were deployed in a trial). Each tethering device consisted of a lawn staple as an anchor placed in the center of a subplot, connected to a 30-cm long section of 3.6-kg clear monofilament fishing line. For blue crabs, the free end of the monofilament was glued to the center of the crab\u2019s carapace after making a lasso around the crab\u2019s body. Blue crabs had each of their claws glued shut using Loctite super glue gel to prevent them from cutting the tether. Pinfish were tethered through the soft tissue immediately behind their lower jaw bone by piercing this tissue, threading the line through the piercing, and the tying an overhand knot in the line. As a method check, we individually tethered >40 blue crabs and >20 pinfish in laboratory tanks outfitted with artificial seagrass. Over a 4-day period, none of the tethered animals became free, tethered pinfish did not behave noticeably different that untethered pinfish also in the tank, and tethered animals did not become entangled in artificial seagrass blades. Tethered blue crabs and pinfish were deployed in our field experiment ~3 hours before daytime high tides. Following deployment, each tethered animal was checked after 1 hour, 2 hours, 3 hours, and 24 hours to assess loss rates (presumably via predation). Individual blue crabs or pinfish missing at the 1-, 2-, 3-, and 24-hour checks were randomly assigned a survival time ranging between 0-1, 1-2, 2-3, and 3-24 hours, respectively, to acknowledge that we could not be sure within check intervals when predation occurred. Furthermore, this approach insured that we did not artificially reduce variances among replicates. Any animal remaining on its tether after 24 hours was assigned a survival time of 24 hours, and then released.
attribute	NC_GLOBAL	awards_0_award_nid	String	714025
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1635950
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1635950
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	Michael E. Sieracki
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	50446
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Nekton predation in seagrass PI: FJ Fodrie Version: 2017-08-29
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	2017-09-05T17:10:59Z
attribute	NC_GLOBAL	date_modified	String	2019-03-01T18:26:25Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.714252.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-76.56667
attribute	NC_GLOBAL	geospatial_lat_max	double	34.66667
attribute	NC_GLOBAL	geospatial_lat_min	double	34.66667
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-76.56667
attribute	NC_GLOBAL	geospatial_lon_min	double	-76.56667
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/714252
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	Custom Trawl
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	All crabs and pinfish were collected via small trawl on the day before deployment.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	714256
attribute	NC_GLOBAL	instruments_0_description	String	A net towed through the water column designed to sample free-swimming nekton or fish, varies in design depending on the research project.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/23/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Trawl_custom
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	634
attribute	NC_GLOBAL	instruments_0_supplied_name	String	small trawl
attribute	NC_GLOBAL	keywords	String	along, bco, bco-dmo, biological, chemical, data, dataset, date, density, dmo, edge, erddap, latitude, longitude, management, name, oceanography, office, preliminary, prey, prey_size, replicate, shoot, shoot_density, site, site_name, size, species, start, start_date, tether, tether_along_edge, time, time_on_tether
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/714252/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/714252
attribute	NC_GLOBAL	Northernmost_Northing	double	34.66667
attribute	NC_GLOBAL	param_mapping	String	{'714252': {'lat': 'flag - latitude', 'lon': 'flag - longitude'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/714252/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	University of North Carolina - Morehead City
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	UNC-MC
attribute	NC_GLOBAL	people_0_person_name	String	Dr F. Joel Fodrie
attribute	NC_GLOBAL	people_0_person_nid	String	559341
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	Habitat Fragmentation
attribute	NC_GLOBAL	projects_0_acronym	String	Habitat Fragmentation
attribute	NC_GLOBAL	projects_0_description	String	Amount and quality of habitat is thought to be of fundamental importance to maintaining coastal marine ecosystems. This research will use large-scale field experiments to help understand how and why fish populations respond to fragmentation of seagrass habitats. The question is complex because increased fragmentation in seagrass beds decreases the amount and also the configuration of the habitat (one patch splits into many, patches become further apart, the amount of edge increases, etc). Previous work by the investigators in natural seagrass meadows provided evidence that fragmentation interacts with amount of habitat to influence the community dynamics of fishes in coastal marine landscapes. Specifically, fragmentation had no effect when the habitat was large, but had a negative effect when habitat was smaller. In this study, the investigators will build artificial seagrass habitat to use in a series of manipulative field experiments at an ambitious scale. The results will provide new, more specific information about how coastal fish community dynamics are affected by changes in overall amount and fragmentation of seagrass habitat, in concert with factors such as disturbance, larval dispersal, and wave energy. The project will support two early-career investigators, inform habitat conservation strategies for coastal management, and provide training opportunities for graduate and undergraduate students. The investigators plan to target students from underrepresented groups for the research opportunities. Building on previous research in seagrass environments, this research will conduct a series of field experiments approach at novel, yet relevant scales, to test how habitat area and fragmentation affect fish diversity and productivity. Specifically, 15 by 15-m seagrass beds will be created using artificial seagrass units (ASUs) that control for within-patch-level (~1-10 m2) factors such as shoot density and length. The investigators will employ ASUs to manipulate total habitat area and the degree of fragmentation within seagrass beds in a temperate estuary in North Carolina. In year one, response of the fishes that colonize these landscapes will be measured as abundance, biomass, community structure, as well as taxonomic and functional diversity. Targeted ASU removals will then follow to determine species-specific responses to habitat disturbance. In year two, the landscape array and sampling regime will be doubled, and half of the landscapes will be seeded with post-larval fish of low dispersal ability to test whether pre- or post-recruitment processes drive landscape-scale patterns. In year three, the role of wave exposure (a natural driver of seagrass fragmentation) in mediating fish community response to landscape configuration will be tested by deploying ASU meadows across low and high energy environments.
attribute	NC_GLOBAL	projects_0_end_date	String	2019-08
attribute	NC_GLOBAL	projects_0_geolocation	String	North Carolina
attribute	NC_GLOBAL	projects_0_name	String	Collaborative Research: Habitat fragmentation effects on fish diversity at landscape scales: experimental tests of multiple mechanisms
attribute	NC_GLOBAL	projects_0_project_nid	String	714026
attribute	NC_GLOBAL	projects_0_start_date	String	2016-09
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	Southernmost_Northing	double	34.66667
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	subsetVariables	String	site_name,latitude,longitude
attribute	NC_GLOBAL	summary	String	Our investigation of seagrass edge effects on mesopredators and larger predators took place in Back Sound, North Carolina (34 degrees 40 minutes North, 76 degrees 34 minutes West). Predation-driven mortality (loss rates of tethered individuals) of blue crabs and pinfish were monitored within a 5,600 m2 seagrass meadow at Jack's Island along the southern rim of Back Sound. These predation measurements were collected during June-July, 2015, in connection with the global-scale Zostera Experimental Network study.
attribute	NC_GLOBAL	title	String	Relative predation intensity within temperate seagrass habitat during June 2015 (Habitat_Fragmentation project)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-76.56667
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	site_name		String
attribute	site_name	bcodmo_name	String	site
attribute	site_name	description	String	name of the site
attribute	site_name	long_name	String	Site Name
attribute	site_name	units	String	unitless
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	34.66667, 34.66667
attribute	latitude	axis	String	Y
attribute	latitude	bcodmo_name	String	latitude
attribute	latitude	colorBarMaximum	double	90.0
attribute	latitude	colorBarMinimum	double	-90.0
attribute	latitude	description	String	Our investigation of seagrass edge effects on mesopredators and larger predators took place in Back Sound, North Carolina (34 degrees 40 minutes North, 76 degrees 34 minutes West).
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LATX/
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
variable	longitude		double
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	_FillValue	double	NaN
attribute	longitude	actual_range	double	-76.56667, -76.56667
attribute	longitude	axis	String	X
attribute	longitude	bcodmo_name	String	longitude
attribute	longitude	colorBarMaximum	double	180.0
attribute	longitude	colorBarMinimum	double	-180.0
attribute	longitude	description	String	Our investigation of seagrass edge effects on mesopredators and larger predators took place in Back Sound, North Carolina (34 degrees 40 minutes North, 76 degrees 34 minutes West).
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude
attribute	longitude	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P09/current/LONX/
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	species		String
attribute	species	bcodmo_name	String	common_name
attribute	species	description	String	Speceies of observation; Crab = blue crab (Callinectes sapidus); Pinfish = pinfish (lagodon rhomboides)
attribute	species	long_name	String	Species
attribute	species	units	String	unitless
variable	replicate		short
attribute	replicate	_FillValue	short	32767
attribute	replicate	actual_range	short	1, 336
attribute	replicate	bcodmo_name	String	unknown
attribute	replicate	description	String	Number on float to uniquely ID each tethered prey during each experimental trial.
attribute	replicate	long_name	String	Replicate
attribute	replicate	units	String	unitless
variable	start_date		int
attribute	start_date	_FillValue	int	2147483647
attribute	start_date	actual_range	int	20150610, 20150624
attribute	start_date	bcodmo_name	String	start_date
attribute	start_date	description	String	Date on which tethers were deployed (monitored over 24 hours) in YYYYMMDD format
attribute	start_date	long_name	String	Start Date
attribute	start_date	units	String	unitless
variable	tether_along_edge		String
attribute	tether_along_edge	bcodmo_name	String	unknown
attribute	tether_along_edge	description	String	Identifier for which the side of the seagrass meadow the species was tethered to. E = Edge (0-1m from seagrass-sandflat boundary); I = Interior (>3m from seagrass-sandflat boundary)
attribute	tether_along_edge	long_name	String	Tether Along Edge
attribute	tether_along_edge	units	String	unitless
variable	shoot_density		String
attribute	shoot_density	bcodmo_name	String	unknown
attribute	shoot_density	description	String	Denisty of seagrass in tethering plot. (A = ambient; 50 = 50% Reduction; 80 = 80% Reduction)
attribute	shoot_density	long_name	String	Shoot Density
attribute	shoot_density	units	String	percent (pcnt)
variable	prey_size		byte
attribute	prey_size	_FillValue	byte	127
attribute	prey_size	actual_range	byte	22, 76
attribute	prey_size	bcodmo_name	String	length
attribute	prey_size	description	String	carapace width of blue crabs or the standard length of pinfish
attribute	prey_size	long_name	String	Prey Size
attribute	prey_size	units	String	milimeters (mm)
variable	time_on_tether		float
attribute	time_on_tether	_FillValue	float	NaN
attribute	time_on_tether	actual_range	float	0.01, 24.0
attribute	time_on_tether	bcodmo_name	String	duration
attribute	time_on_tether	description	String	duration time on tether
attribute	time_on_tether	long_name	String	Time On Tether
attribute	time_on_tether	units	String	hours

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.