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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,.odvTxt
attribute NC_GLOBAL acquisition_description String For Table and Figure references below, see the document\n\"SquidpopAssay_statistical_analysis.pdf\" in the Supplemental Files section.\n \nStudy Site Selection\n \nWe conducted our study across eight discrete seagrass meadows (hereafter\nreferred to as landscapes) located in Back Sound, North Carolina (NC), USA\n(3442\\u2032 N to 3439\\u2032 N, 7637\\u2032 W to 7631\\u2032 W) (Fig. S1). All of\nour sampled landscapes were composed of a mixture of Back Sound's dominant\nseagrasses: eelgrass and shoal grass, Halodule wrightii (Ascherson 1868)\n(Yeager et al. 2016). Landscapes were chosen based upon available aerial\nimagery in Google Earth Pro as of February 19, 2017, and ground-truthed for\nchanges in seasonal seagrass growth/senescence using summer, 2017, drone\nphotography and ImageJ 1.x (Schneider et al. 2012). No discernable differences\nin landscape fragmentation states (e.g. total area, number of patches) were\nfound between the two aerial imagery sources. All landscapes were relatively\nshallow (1-1.5 m depth at high tide), reasonably isolated from other seagrass\nbeds (distance to nearest seagrass meadow = 112 17 m [mean standard error])\nand were appropriately sized to encompass short-term (e.g., daily, monthly)\nmovements of common seagrass-associated fauna in this system (Yeager et al.\n2016). We identified similarly sized landscapes (25882 6592 m2) available in\nBack Sound by defining the minimum convex polygon surrounding the seagrass\nmeadow, regardless of the total seagrass cover within the polygon. Among eight\ncandidate landscapes of similar size, we defined four continuous landscapes\nand four fragmented landscapes based on the number of patches, the perimeter-\nto-area ratio, and the largest patch's percent cover of the total seagrass\narea (Table 1). Seagrass fragmentation is often naturally coupled with habitat\nloss (Wilcove et al. 1986), resulting in the mean seagrass area of our\nfragmented landscapes being nearly half that of our continuous landscapes\n(Table 1). Thus, our experiment was designed to examine the effects of\nfragmentation (i.e., the breaking apart of habitat concomitant with habitat\nloss) rather than fragmentation per se (i.e., the breaking apart of habitat\nwithout habitat loss; sensu Fahrig 2003).\n \nSquidpop Assays\n \nSquidpops were also used to measure relative \"depredation\" across landscapes\n(acknowledging that a combination of predation and scavenging may account for\nobserved loss patterns). Squidpops are 1-cm 1-cm squares of dried squid mantle\ntied to 1-cm segments of 12-lbs test monofilament (Duffy et al. 2015). We\nattached squidpops to 60-cm long, 0.5-cm diameter, fiberglass stakes. Twenty\nsquidpops were deployed (stakes pushed 50 cm into the sediment to prevent\nsquidpop tangling in seagrass or burial in sediment) within each of the eight\nlandscapes per assay date during July and August (July 5, July 13, July 26,\nAugust 8, and August 30). Within each landscape, 10 squidpops were haphazardly\nplaced within seagrass edges, defined as 30 cm (a crab tether length) from the\nseagrass-mudflat interface. The other 10 squidpops were haphazardly placed in\nseagrass interiors, defined as \\u22651 m from the seagrass-mudflat interface.\nOnly patches with a radius of 1 m or larger were used for squidpops classified\nas 'interior'. However, patches with a radius of <1 m were used for a portion\nof our 'edge' squidpops. All squidpops were placed at least 1 m apart. A total\nof 720 squidpops were deployed (Table S1). Squidpop depredation assays did not\noccur in June due to lack of dried squid availability. During the first two\nsquidpop deployment cycles we checked squidpop status (present, absent/eaten)\nat 1 h and 24 h. We observed nearly 100% squidpop removal by 24 h, so for the\nremaining three deployment cycles we performed status checks at 1 h and 2 h.\n \nPoint measurements of water temperature (C) were taken in each landscape at\nthe location and time of all squidpop assays hand-held thermometers (Table\nS1). We chose temperature as our seasonality proxy (Fig. S2) because several\nother seasonally affected factors including faunal densities correlate with\nwater temperature variability. Additionally, the measurement of temperature is\neasy, cheap, reliable, and comparable to previous studies.\n \nEquipment:\n \nDried squid mantel: whole dried squid from Asian food market  \n Tether materials:  \n EcoStakes \\u2013 tomato plant stakes  \n 12-lbs test monofilament fishing line  \n Pool noodles \\u2013 cut into rounds for tether relocation floats  \n Hand-held digital thermometer- LYNCH Waterproof thermometer 39240  \n Hand-held refractometer-VEE GEE STX-3 Salinity 0-100%o  \n Hand-held Garmin GPSmap 78
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 Squidpop Assay \n  PI(s): Dr F. Joel Fodrie \n  Data Version 1: 2019-11-06
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 2019-10-29T20:51:31Z
attribute NC_GLOBAL date_modified String 2019-11-13T18:30:09Z
attribute NC_GLOBAL defaultDataQuery String &amp;time&lt;now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.780092.1
attribute NC_GLOBAL Easternmost_Easting double -76.526267
attribute NC_GLOBAL geospatial_lat_max double 34.703251
attribute NC_GLOBAL geospatial_lat_min double 34.651056
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -76.526267
attribute NC_GLOBAL geospatial_lon_min double -76.587826
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/780092 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String Refractometer
attribute NC_GLOBAL instruments_0_dataset_instrument_description String Hand-held refractometer-VEE GEE STX-3 Salinity 0-100%o
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 781111
attribute NC_GLOBAL instruments_0_description String A refractometer is a laboratory or field device for the measurement of an index of refraction (refractometry). The index of refraction is calculated from Snell's law and can be calculated from the composition of the material using the Gladstone-Dale relation.\n\nIn optics the refractive index (or index of refraction) n of a substance (optical medium) is a dimensionless number that describes how light, or any other radiation, propagates through that medium.
attribute NC_GLOBAL instruments_0_instrument_name String Refractometer
attribute NC_GLOBAL instruments_0_instrument_nid String 679
attribute NC_GLOBAL instruments_0_supplied_name String VEE GEE STX-3
attribute NC_GLOBAL instruments_1_dataset_instrument_nid String 781113
attribute NC_GLOBAL instruments_1_description String Acquires satellite signals and tracks your location.
attribute NC_GLOBAL instruments_1_instrument_name String GPS receiver
attribute NC_GLOBAL instruments_1_instrument_nid String 706037
attribute NC_GLOBAL instruments_1_supplied_name String Hand-held Garmin GPSmap 78
attribute NC_GLOBAL instruments_2_dataset_instrument_description String Hand-held digital thermometer-
attribute NC_GLOBAL instruments_2_dataset_instrument_nid String 781110
attribute NC_GLOBAL instruments_2_instrument_name String Thermometer
attribute NC_GLOBAL instruments_2_instrument_nid String 725867
attribute NC_GLOBAL instruments_2_supplied_name String LYNCH Waterproof thermometer 39240
attribute NC_GLOBAL keywords String air, AirTemp_C, bco, bco-dmo, biological, bobber, Bobber_Num, C_F, chemical, cov, data, dataset, date, density, depth, Depth_m, dmo, E_I, earth, Earth Science > Oceans > Salinity/Density > Salinity, erddap, high, HighTide, hr1, hr2, hr24, iso, latitude, longitude, low, LowTide, management, notes, num, ocean, oceanography, oceans, office, out, percent, percent_sg_cov, practical, preliminary, salinity, Salinity_PSU, science, sea, sea_water_practical_salinity, seawater, site, SiteID, temperature, tide, time, TimeIn, TimeInFromHigh, TimeOut, water, WaterTemp_C
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/780092/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/780092 (external link)
attribute NC_GLOBAL Northernmost_Northing double 34.703251
attribute NC_GLOBAL param_mapping String {'780092': {'lat': 'master - latitude', 'lon': 'master - longitude', 'ISO_DateTime_UTC_In': 'master - time'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/780092/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of North Carolina at Chapel Hill
attribute NC_GLOBAL people_0_affiliation_acronym String UNC-Chapel Hill-IMS
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 University of North Carolina at Chapel Hill
attribute NC_GLOBAL people_1_affiliation_acronym String UNC-Chapel Hill-IMS
attribute NC_GLOBAL people_1_person_name String Amy Yarnall
attribute NC_GLOBAL people_1_person_nid String 780032
attribute NC_GLOBAL people_1_role String Contact
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL people_2_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_2_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_2_person_name String Amber York
attribute NC_GLOBAL people_2_person_nid String 643627
attribute NC_GLOBAL people_2_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_2_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 34.651056
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String Relative depredation (binomial) data from a squidpop tethering experiment in summer 2017 in Back Sound, North Carolina.
attribute NC_GLOBAL time_coverage_end String 2017-08-31T14:27Z
attribute NC_GLOBAL time_coverage_start String 2017-07-05T17:04Z
attribute NC_GLOBAL title String [Squidpop Assay] - Relative depredation (binomial) data from a squidpop tethering experiment in summer 2017 in Back Sound, North Carolina (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 -76.587826
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable Date String
attribute Date bcodmo_name String date
attribute Date description String Date tethered crab deployed in ISO 8601 format yyyy-mm-dd
attribute Date long_name String Date
attribute Date nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/ (external link)
attribute Date time_precision String 1970-01-01
attribute Date units String unitless
variable SiteID String
attribute SiteID bcodmo_name String site_descrip
attribute SiteID description String Name of seagrass bed in which tether was deployed
attribute SiteID long_name String Site ID
attribute SiteID units String unitless
variable C_F String
attribute C_F bcodmo_name String site_descrip
attribute C_F description String Fragmentation state of seagrass bed: C = Continuous, F = Fragmented
attribute C_F long_name String C F
attribute C_F units String unitless
variable latitude double
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 34.651056, 34.703251
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 Latitude
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 -76.587826, -76.526267
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 Longitude
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 percent_sg_cov float
attribute percent_sg_cov _FillValue float NaN
attribute percent_sg_cov actual_range float 0.069, 0.998
attribute percent_sg_cov bcodmo_name String cover_pcent
attribute percent_sg_cov colorBarMaximum double 100.0
attribute percent_sg_cov colorBarMinimum double 0.0
attribute percent_sg_cov description String Percent/100 cover of seagrass with the minimum convex polygon surrounding the seagrass meadow
attribute percent_sg_cov long_name String Percent Sg Cov
attribute percent_sg_cov units String dimensionless
variable AirTemp_C float
attribute AirTemp_C _FillValue float NaN
attribute AirTemp_C actual_range float 21.1, 31.1
attribute AirTemp_C bcodmo_name String temp_air
attribute AirTemp_C description String Air temperature at time and place of tether deployment
attribute AirTemp_C long_name String Air Temp C
attribute AirTemp_C units String degrees Celsius (C)
variable WaterTemp_C float
attribute WaterTemp_C _FillValue float NaN
attribute WaterTemp_C actual_range float 23.3, 31.8
attribute WaterTemp_C bcodmo_name String temperature
attribute WaterTemp_C description String Water temperature at time and place of tether deployment
attribute WaterTemp_C long_name String Water Temp C
attribute WaterTemp_C nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/ (external link)
attribute WaterTemp_C units String degrees Celsius (C)
variable Salinity_PSU byte
attribute Salinity_PSU _FillValue byte 127
attribute Salinity_PSU actual_range byte 34, 38
attribute Salinity_PSU bcodmo_name String sal
attribute Salinity_PSU colorBarMaximum double 37.0
attribute Salinity_PSU colorBarMinimum double 32.0
attribute Salinity_PSU description String Salinity of water at time and place of tether deployment
attribute Salinity_PSU long_name String Sea Water Practical Salinity
attribute Salinity_PSU nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/PSALST01/ (external link)
attribute Salinity_PSU units String Practical Salinity Units (PSU)
variable Depth_m float
attribute Depth_m _FillValue float NaN
attribute Depth_m actual_range float 0.4, 1.1
attribute Depth_m bcodmo_name String depth_w
attribute Depth_m colorBarMaximum double 8000.0
attribute Depth_m colorBarMinimum double -8000.0
attribute Depth_m colorBarPalette String TopographyDepth
attribute Depth_m description String Depth of water at time and place of tether deployment
attribute Depth_m long_name String Depth
attribute Depth_m standard_name String depth
attribute Depth_m units String meters (m)
variable HighTide String
attribute HighTide bcodmo_name String time_local
attribute HighTide description String Time of high tide at place of tether deployment [EDT][GMT-4h] in format h:mm
attribute HighTide long_name String High Tide
attribute HighTide units String unitless
variable LowTide String
attribute LowTide bcodmo_name String time_local
attribute LowTide description String Time of low tide at place of tether deployment [EDT][GMT-4h] in format h:mm
attribute LowTide long_name String Low Tide
attribute LowTide units String unitless
variable TimeInFromHigh String
attribute TimeInFromHigh bcodmo_name String time_elapsed
attribute TimeInFromHigh description String At time of tether deployment, time passed since high tide in format h:mm
attribute TimeInFromHigh long_name String Time In From High
attribute TimeInFromHigh nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/ELTMZZZZ/ (external link)
attribute TimeInFromHigh units String unitless
variable Tide String
attribute Tide bcodmo_name String site_descrip
attribute Tide description String At time of tether deployment, ebb or flow tide
attribute Tide long_name String Tide
attribute Tide units String unitless
variable Bobber_Num short
attribute Bobber_Num _FillValue short 32767
attribute Bobber_Num actual_range short 401, 700
attribute Bobber_Num bcodmo_name String deployno
attribute Bobber_Num description String Individual ID number of tether (numbers may be repeated across dates)
attribute Bobber_Num long_name String Bobber Num
attribute Bobber_Num units String per individual
variable E_I String
attribute E_I bcodmo_name String site_descrip
attribute E_I description String Position of tether deployment with seagrass bed; E = edge (≤0.3 m from seagrass/mudflat interface), I = Interior (>1 m from seagrass/mudflat interface)
attribute E_I long_name String E I
attribute E_I units String unitless
variable TimeIn String
attribute TimeIn bcodmo_name String time_local
attribute TimeIn description String Local time of tether deployment [EDT][GMT-4h] in format h:mm
attribute TimeIn long_name String Time In
attribute TimeIn units String unitless
variable TimeOut String
attribute TimeOut bcodmo_name String time_local
attribute TimeOut description String Local time of tether removal [EDT][GMT-4h] in format h:mm
attribute TimeOut long_name String Time Out
attribute TimeOut units String unitless
variable hr1 byte
attribute hr1 _FillValue byte 127
attribute hr1 actual_range byte 0, 1
attribute hr1 bcodmo_name String flag
attribute hr1 description String Status of squidpop on tether at 1 hour from deployment time; 1 = present, 0 = absent
attribute hr1 long_name String HR1
attribute hr1 units String unitless
variable hr2 byte
attribute hr2 _FillValue byte 127
attribute hr2 actual_range byte 0, 1
attribute hr2 bcodmo_name String flag
attribute hr2 description String Status of squidpop on tether at 2 hours from deployment time; 1 = present, 0 = absent
attribute hr2 long_name String HR2
attribute hr2 units String unitless
variable hr24 byte
attribute hr24 _FillValue byte 127
attribute hr24 actual_range byte 0, 1
attribute hr24 bcodmo_name String flag
attribute hr24 description String Status of squidpop on tether at 24 hours from deployment time; 1 = present, 0 = absent
attribute hr24 long_name String HR24
attribute hr24 units String unitless
variable time double
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.49927424E9, 1.50418962E9
attribute time axis String T
attribute time bcodmo_name String ISO_DateTime_UTC
attribute time description String Date Time (UTC) in ISO 8601 format yyyy-mm-ddTHH:MMZ
attribute time ioos_category String Time
attribute time long_name String ISO Date Time UTC In
attribute time nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/ (external link)
attribute time source_name String ISO_DateTime_UTC_In
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time time_precision String 1970-01-01T00:00Z
attribute time units String seconds since 1970-01-01T00:00:00Z
variable Notes String
attribute Notes bcodmo_name String comment
attribute Notes description String Notes relevant to individual tether
attribute Notes long_name String Notes
attribute Notes units String unitless

 
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