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204 results for “Hog Island”
Summer water temperature and light measurements in Hog Island Bay, VA 2011-2014
This dataset contains water temperature and crude light measurements taken every 15 minutes for locations within the seagrass set-aside area in Hog Island Bay. Measurements are made in the summer when temperature maxima are expected to occur. Only temperature data is available for 2011 and early 2012. No sampling was done in 2013.
Microhabitat at small mammal trapping stations on Hog Island, VA in 1991
Measurements of the habitat (within 2 meters) of trapping stations on Hog Island were made in the spring of 1991. These measurements included the percent cover, height and dominant vegetation at each site. Note: this is a very dynamic island, so significant changes in habitat occurred within a few years of collection of this data.
High resolution LiDAR Data for Hog Island, VA, 2013
High Resolution LiDAR elevation and nearshore bathymetry data for Hog Island, Northampton County, VA, collected on May 26, 2013 on behalf of the USACE Engineer Research and Development Center using the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. Hyperspectral imagery is provided as a separate VCRLTER dataset. Four data entities are included here: (1) the LiDAR point cloud (approximate point density of 5-30 points per square meter [denser over structures and dense vegetation]) in standard LiDAR LAS file format; (2) a rasterized digital elevation model (DEM) derived from the point cloud depicting elevation of the water-free first return surface with a cell resolution of 1 meter; (3) a DEM of the same first return surface with a cell resolution of 5 meters; and (4) a DEM depicting the bare earth surface with vegetation and structures removed, at a 1 meter resolution. DEMs are in georegistered TIFF format. ArcGIS and FGDC metadata files in XML format are also included. To obtain vegetation and building heights, subtract the bare earth model from the surface model. Areas of open water with sparse or no bottom returns (either due to water depth or clarity issues) are masked out in the DEM data.
Hyperspectral imagery for Hog Island, VA, 2013
High resolution hyperspectral imagery Hog Island, Northampton County, VA, collected on May 26, 2013 on behalf of the USACE Engineer Research and Development Center using the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. LiDAR data is provided as a separate VCRLTER dataset. Four data entities are included here: RADIANCE data across (a) 48 and (b) 96 spectral bands at 1 and 2 meters spatial resolution, respectively; and atmospherically-corrected FLAASH reflectance data (c & d) across the same bands and resolutions. The 48-band data cover the spectral range of 369.1 to 1040.0 nm (+/- 7.1 nm) and the 96-band data cover a similar range of 360.4 to 1038.4 nm (+/- 3.6 nm). Individual bands are described in the metadata for each data entity. Both the FLAASH reflectance and the radiance data have had a water mask applied to them; therefore no hyperspectral data is currently available for nearshore and offshore environments nor for deeper marsh creeks and ponds. FLAASH zip files also include the corresponding ENVI template files containing the FLAASH Atmospheric Model Input Parameters.
High resolution LiDAR Data for Hog Island, VA, 2011
High Resolution LiDAR elevation and nearshore bathymetry data for Hog Island, Northampton County, VA, collected on October 11, 2011 on behalf of the USACE Engineer Research and Development Center using the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. RGB air photo imagery is provided as a separate VCRLTER dataset. Two data entities are included here: (1) the LiDAR point cloud (approximate point density of 100 points per square meter [denser over structures and dense vegetation], average point spacing of 0.48 m.) contained in a mosaic of 211 LAS files (standard LiDAR LAS file format); and (2) a polygon INDEX shapefile showing the footprint of each LAS file and containing a summary description of each LAS file in the attribute table (LAS file name, point count, point spacing, and minimum and maximum elevation). Note that the two co-collected 2011 USACE datasets (LiDAR and RGB ) are in different coordinate systems: (A) the horizontal and vertical units of the LiDAR data are in US feet, not meters. (B) the horizontal units of the associated RGB mosaic images are in [standard] meters. Also Note that THESE ARE VERY LARGE DATASETS and download should not be attempted unless you have a fast network connection and plenty of disk space. The LAS file data collection is 7.3 GB compressed (11.7 GB uncompressed). The RGB imagery mosaic data collection is 12.9 GB compressed (30.8 GB uncompressed).
High resolution Air Photo Mosaic for Hog Island, VA, 2011
High resolution (6 cm pixel) RGB true color tiled air photo mosaics for Hog Island, Northampton County, VA, collected on October 11, 2011 on behalf of the USACE Engineer Research and Development Center using the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. LiDAR data is provided as a separate VCRLTER dataset. Two data entities are included here: (1) a tiled collection of air photo mosaics created from the CZMIL camera imagery (6 cm. resolution; tiles approximately 690 x 715 m. in X and Y, resp.) composed of 71 individual georeferenced TIFF files; and (2) a polygon INDEX shapefile showing the footprint of each TIFF file and containing ID information in the attribute table (column, row, and colrow matching the TIFF naming convention). Note that the two co-collected 2011 USACE datasets (LiDAR and RGB ) are in different coordinate systems: (A) the horizontal and vertical units of the LiDAR data are in US feet, not meters; and (B) the horizontal units of the associated RGB mosaic images are in [standard] meters. Also Note that THESE ARE VERY LARGE DATASETS and download should not be attempted unless you have a fast network connection and plenty of disk space. The LAS file data collection is 7.3 GB compressed (11.7 GB uncompressed). The RGB imagery mosaic data collection is 12.9 GB compressed (30.8 GB uncompressed).
Leaf area index (LAI), leaf traps and allometric data for Morella cerifera on Hog Island, VA 2004 and 2007
Leaf-area index (LAI) and understory light levels of Morella cerifera shrub thickets were assessed on Hog Island, Virginia, USA, at four sites along a soil chronosequence. LAI was estimated from annual leaf litter, with allometric models relating stem diameter to leaf area, with a portable integrating radiometer (LI-COR LAI-2000), and from photosynthetically active radiation (PAR) using the Beer-Lambert law. Read More: http://www.esajournals.org/doi/full/10.1890/06-0913
Photosynthetic capacity and electron transport rate for a chronosequence of shrub thickets on Hog Island, VA , 2012
Photosynthetic capacity and electron transport rate (ETR) was assessed for Morella cerifera shrubs at 4 sites ranging in age from 10 to 50 years on Hog Island, VA during June and July 2012 using a pulse amplitude modulated (PAM) leaf fluorometer.
Wave and turbidity measurements, Fowling Point, Hog Island Bay, VA, Summer 2016
Time series of turbidity, water surface elevation, wave height and period, current, and water temperature were measured at sites along a bay-to-marsh transect along the east-facing margin of Fowling Point, Hog Island Bay, VA in summer 2016. The measurements were made to characterize suspended sediment concentrations in the water inundating Fowling Point marsh during high tides and storms, as a proxy for the availability of sediment for wetland accretion. The time series includes a spring-neap cycle and a wind-driven resuspension event. The measurements were made to support marsh depositional modeling being carried out as part of an NSF-sponsored Coastal SEES research project.
Transplanted grasses on Hog Island, VA 2014-2015
This dataset documents our data from a transplant experiment on the south end of Hog Island. 180 individual transplants, 60 of each of three common east coast dune grasses, Ammophila breviligulata, Spartina patens, and Uniola paniculata were planted from the crest of the foredune to the high water mark. Each month during the growing seasons (May-October) of 2014 and 2015, the longest leaf of the plant was recorded as a proxy for plant health, as well as the elevation at each plant site. The data here are those measurements.
Marsh shoreline topographic surveys for Chimney Pole Marsh, Hog Island and Upshur Neck, VA 2008-2010
Repeated topographic surveys were made at the marsh boundaries on Hog Island, Chimney Pole Marsh and Upshur Neck, VA.
Species composition and plant functional traits on Hog and Metompkin Islands, VA 2016-2017
Physical characteristics (soil salinity, elevation, distance from shoreline) and biological parameters (species composition, cover, biomass, and functional traits) were measured for plants on Hog Island (Northampton Co. VA) and Metompkin Island (Accomack County, VA). Physical parameters were measured during 2016. Plant biomass, species composition, percent cover, and functional traits were measured in 2017. Data Table 1: Environmental and geographic data on Hog and Metompkin Islands, VA 2016 Data Table 2: Species composition and aboveground plant functional traits on Hog and Metompkin Islands, VA 2017 Data Table 3: Vegetative biomass on Hog and Metompkin Islands, VA 2017 Data Table 4: Plot-level root functional traits on Hog and Metompkin Islands, VA 2017 Data Table 5: Latitude-longitude coordinates of plots on Hog and Metompkin Islands, VA 2016-2017
Minirhizotron Root Data for Hog Island, VA 1992-1998
Minirhizotron data from fertilization experiment. On 36-year old dune ridge on Hog Island from 1992 to 1998. These tubes were sampled twice a year with the fall data from 1992 included. In most cases 26 frames were sampled randomly within specific depth intervals and digitized for each tube. Plot 1 was discontinued after 10/93 and Plot 2 was discontinued after 4/93. In this data set if there were no roots in a frame then no ROOT ID appears and length and width are 0. fertilization treatment = In 1992, three applications of 15 gN / m2 (March, June, October). After 1992, 15 gN / m2 applied once per year (mid-summer) through 1998.
Elevation Surveys near the inlets of Hog and Parramore Islands, VA 1988-1990
Radial optical surveys of island elevation for Hog Island and Parramore Island VA. Survey was made in 1988-1990. formatte.csv NINLET = North Hog Island. Steel Pipe marker was installed in the middle of the northern part of the island on the highest dune found. Pipe seems to have been removed, so temporary wooden stake left in place. Distances are from that point. Angles are relative to Magnetic North. Elevations are relative to high water line. Same for SINLET = South Hog Island and PARINLET = south Parramore Island except that steel pipe in place. All elevation data for north Cobb Island is MISSING and was not included.
Myrica distribution on Hog Island Transect 1 of the Virginia Coastal Reserve 1989
Data file for Transect #1 is : Myrt1ind.csv files Myrt1plt.csv and Myrt1int.csv contain summed data from Myrt1ind.csv for each plot and each transect intercept, resp.
Distribution of overwash disturbance on Hog Island of the Virginia Coast Reserve 1974
Fahrig, L., B. Hayden and R. Dolan 1993. Distribution of barrier island plants in relation to overwash disturbance: A test of life history theory. J. Coastal Research. 9(2):403-412. From lfahrig@ccs.carleton.ca Thu Jun 11 10:22:56 1992 I am sending a file that is actually a SAS program for reading in the dataset that I used in the calculations. The columns are: map: base map number (i.e., the map number that Dolan/Hayden used for their rectangular blocks of coastline) trans: transect number from south to north for that map The remaining columns refer to a point on the transect at which there is a transition between vegetation communities (as defined by McCaffrey and digitized by LTER): utm1: first utm co-ord for transition point utm2: second utm co-ord for transition point unit: unit number for the vegetation community type that we are moving INTO. We are moving along the transect from the sea side to the mainland side of the island. The unit numbers are the numbers that you used when digitizing the map. For example, note that the first observation for every transect has unit number 7 since this is the number for sand. Editors note: Vegetation unit number refers to the mapping units used by McCaffrey, C.A. and R.D. Dueser. 1990. Plant associations on the Virginia Barrier Islands. Virginia Journal of Science 41(4A):282-299. The digital versions of the vegetation maps are also available on the VCR LTER information server. Unit numbers are listed below along with the corresponding vegetation class. GRID-CODE VEG_CODE VEG_CLASS 0 w Water/background 1 A Foredune Grassland 2 G Dense Grassland 3 AG Beachgrass Dunes/ Dense Grassland Dunes 4 g Sparse Grassland 5 Ag Foredune - Sparse Grassland Complex 6 At Open Dunes - Thicket Complex 7 B Beach 8 T Tall Thicket 9 AT Open Dunes - Thicket Complex 10 t Low Thicket 11 J Juniper Thicket 12 P Pine Forest 13 H Hardwood Forest 14 PH Pine-Hardwood Forest Complex 15 m Low Salt Marsh 16 Mm Upper Low Salt Marsh 17 M Brackish Marsh 18 s S
Cotton Strip Decomposition - Tensile Strength on Hog Island, VA 1991
Data represent tensile strength loss in cotton strip fibers over these time periods across teh Hog Island Chronosequence. This is an assay for decomposition rates that controls for substrate quality. The assay was also conducted in plots fertilized with nitrogen.
Hog Island Soil Nutrient Data 1991-1992
Soil nutrient data (nitrogen) from cores was collected on dunes and swales acorss Hog Island chronosequence. Includes nitrogen fertilized areas on dunes and incubated cores fro N-mineralization estimates.
Fertilization Above and Below Ground Biomass and Species Number on Hog Island Dunes, 1991
A one-year study on the accreting north end of Hog Island, VA, provided the opportunity to quantify amounts of plant biomass along a natural dune chronosequence (24, 36, and 120+ year-old dunes) and biomass response to experimental additions of nitrogen. Total aboveground biomass, root biomass, and species number in 1-m2 plots on the dunes across the North Hog Chronosequence. Treatment plots included screened, fertilized, and screened & fertilized.
Dune Biomass on Hog Island, Virginia Coastal Barrier Islands, 1993-2012
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