BCO-DMO ERDDAP
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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\ncrabs and pinfish within edge and interior regions of the seagrass meadow at\nJack\\u2019s Island. Our design consisted of 21 \\\"edge\\\" (0-1 m from seagrass-\nsandflat boundary) and 21 \\\"interior\\\"(>3 m from seagrass-sandflat boundary)\nplots, with each plot defined by two 1x1-m subplots separated from each other\nby 0.5 m (but with the entirety of each plot being at the suitable distance\nfor edge/interior designations). Each of the 42 total plots were separated\nfrom one another by >2 m. For both the edge and interior treatments, seagrass\nshoot density was reduced by 50% in a third of the plots, seagrass shoot\ndensity was reduced by 80% in another third of the plots, and seagrass shoot\ndensity was left at ambient in the final third of plots (all randomly\nassigned). This resulted in a 2x3 experimental design in which meadow location\nand shoot density were fully crossed. Reduction of shoot densities was\nachieved by deploying a 1x1-m quadrant with a 10x10 grid (with each grid cell\n= 0.01 m2). We then removed all seagrass in 50 or 80 of the cells for the 50%\nand 80% reduction treatments, respectively. The resultant shoot densities were\nas follows: ambient treatments had a mean of 575 shoots m-2, 50% reduction\ntreatments had a mean of 283 shoots m-2, and 80% reduction treatments had a\nmean of 124 shoots m-2.\n \nWe deployed 126 tethered blue crabs (5.2 \\u00b1 0.1 cm carapace width) and 168\ntethered pinfish (5.1 \\u00b1 0.1 cm total length) in plots over three and four\ntrials, respectively. We ran one less trial with blue crabs due to the\navailability of specimens within our preferred size range during our\nexperimental window. All crabs and pinfish were collected via small trawl on\nthe day before deployment. During each trial, a tethered blue crab was\nrandomly assigned to one of the subplots within each plot, while a tethered\npinfish was placed in the remaining subplot (i.e., 42 juvenile blue crabs and\n42 pinfish were deployed in a trial). Each tethering device consisted of a\nlawn staple as an anchor placed in the center of a subplot, connected to a\n30-cm long section of 3.6-kg clear monofilament fishing line. For blue crabs,\nthe free end of the monofilament was glued to the center of the crab\\u2019s\ncarapace after making a lasso around the crab\\u2019s body. Blue crabs had each\nof their claws glued shut using Loctite super glue gel to prevent them from\ncutting the tether. Pinfish were tethered through the soft tissue immediately\nbehind their lower jaw bone by piercing this tissue, threading the line\nthrough the piercing, and the tying an overhand knot in the line. As a method\ncheck, we individually tethered >40 blue crabs and >20 pinfish in laboratory\ntanks outfitted with artificial seagrass. Over a 4-day period, none of the\ntethered animals became free, tethered pinfish did not behave noticeably\ndifferent that untethered pinfish also in the tank, and tethered animals did\nnot become entangled in artificial seagrass blades.\n \nTethered blue crabs and pinfish were deployed in our field experiment ~3 hours\nbefore daytime high tides. Following deployment, each tethered animal was\nchecked after 1 hour, 2 hours, 3 hours, and 24 hours to assess loss rates\n(presumably via predation). Individual blue crabs or pinfish missing at the\n1-, 2-, 3-, and 24-hour checks were randomly assigned a survival time ranging\nbetween 0-1, 1-2, 2-3, and 3-24 hours, respectively, to acknowledge that we\ncould not be sure within check intervals when predation occurred. Furthermore,\nthis approach insured that we did not artificially reduce variances among\nreplicates. Any animal remaining on its tether after 24 hours was assigned a\nsurvival 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 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String 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 \n PI: FJ Fodrie  \n 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/ (external link)
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 (external link)
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/ (external link)
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 (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/714252 (external link)
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 (external link)
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.\nBuilding 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 [Nekton predation in seagrass] - Relative predation intensity within temperate seagrass habitat during June 2015 (Habitat_Fragmentation project) (Collaborative Research: Habitat fragmentation effects on fish diversity at landscape scales: experimental tests of multiple mechanisms)
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/ (external link)
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/ (external link)
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

 
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