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22 results for “VCR”
Cross-site comparison of historical trends in marsh change at three LTER sites: GCE, VCR, and PIE.
The data provided here are shapefiles which were generated from digitizing historical maps and aerial photographs for a cross site comparison of changes in marshes at the Plum Island Ecosystem (PIE), Virginia Coast Reserve (VCR), and Georgia Coastal Ecosystems (GCE) Long Term Ecological Research (LTER) sites. This dataset includes shoreline shapefiles digitized for 3 time intervals at each site: 1930s/40s, 1950s/70s, and 2013 as well as a table of results from the shoreline change analysis. Centerlines for all the channels were generated from the shoreline shapefiles and are attributed with Strahler (1965) channel order and sinuosity. Additionally, this dataset includes shapefiles of important features (channels, upland, ponds, tidal flats) digitized for each of three sites at three time intervals.
Variation in Landsat 8-estimated land surface temperature with elevation from Spartina alterniflora marsh cross sections in the Georgia Coastal Ecosystems Long Term Ecological Research (GCE-LTER) site and Virginia Coast Reserve (VCR) LTER sites for winter and summer observations spanning 2013-2018
We estimated land surface temperature from top of atmosphere brightness temperature provided by Landsat 8's band 10 (a thermal band). We collected these measurements first for Spartina alterniflora dominated marsh near the Georgia Coastal Ecosystems Long Term Ecological Research (GCE-LTER) eddy covariance flux tower. Measurements were collected from pixels along three east-west cross sections that spanned a marsh edge to interior gradient. We extracted Landsat 8 data for all available cloud-free low tide dates during August, September, January and February during the years 2013 to 2018 and associated these with marsh elevation information from a 1 m^2 Digital Elevation Model (DEM), created by Haldik et al 2013, also available from the GCE data catalog (http://dx.doi.org/10.6073/pasta/4c5187ef603f70cd0a77ece24ef0fed9). We rescaled the DEM to the coarser spatial resolution of Landsat 8 (30 x 30 m) where the rescaled elevation was the mean of the constituent DEM values. Ultimately, we used generalized additive models to relate land surface temperature to elevation, while accounting for variation from spatial proximity, transect and sample date. These models revealed that land surface temperature was negatively related to marsh elevation on the marsh platform. We then confirmed the generality of this pattern by rederiving these same relationships for three cross sections of Spartina alterniflora marsh at Virginia Coast Reserve (VCR) LTER for winter sampling dates only (data also included here). DEM data for VCR LTER are available at https://www.vcrlter.virginia.edu/gisdata/LIDAR/USGS2015/. We used custom R functions that can convert Landsat 8 top of atmosphere brightness temperature or top of atmosphere radiance from band 10 data to land surface temperature, which are available at https://github.com/jloconnell/convert_top_of_atmosphere_thermal_to_land_surface_temperature. Currently, a provisional land surface temperature product is available on earthexplorer.usgs.gov, w
VCR Fowling Point Salt Marsh Flux Tower, 2019-2023
This dataset contains eddy covariance CO2 and H2O fluxes, sensible and latent heat fluxes, and meteorological measurements collected in an intertidal salt marsh. The flux tower is part of the Virginia Coastal Reserve Long Term Ecological Research (VCR LTER) site on the Eastern Shore of Virginia, USA. The marsh is on the Atlantic Ocean side of the Delmarva Peninsula and faces shallow coastal lagoons backed by barrier islands. No major rivers drain into the area. The tower is located 2 km from the shoreline and 85 m from a major creek edge. The marsh is dominated by Spartina alterniflora (also referred to as Sporobolus alterniflorus), with an average height of 0.6 m. The semidiurnal tidal cycle inundates the marsh platform twice daily, with 10% of time points having water above the mud platform (indicated by the MHHW dataset variable). Fluxes were measured at 10Hz and averaged over 30 minutes. The CO2 and energy fluxes were gap-filled using the REddyProc software package (doi: 10.5194/bg-15-5015-2018). Using the nighttime approach, the gross primary production and ecosystem respiration fluxes were partitioned from the net ecosystem exchange flux. The research was conducted at the Virginia Coastal Reserve Long Term Ecological Research (VCR LTER) site on the Eastern Shore of Virginia, USA. The flux tower site (37-deg 24'39.85"N, 75-deg 50'0.53"W) a lagoonal salt marsh which is located near the area of Fowling point. The site is located at about 2.2 kilometers away from the mainland and 10.7 kilometers away from Hog Island, the nearest barrier island. The flux tower is situated at about 80 meters away from the creek edge, on the lagoonal salt marsh.
Visualization of Marsh Grass Roots and Rhizomes by CT imaging: VCR salt marshes, summer 2012
Computer-aided tomography and image processing previously has been used to accurately and rapidly quantify coarse root mass in coastal wetlands (Davey et al. 2011. Ecological Applications). The data in this data base are being used to develop the technique to allow for resolution of fine roots. The contribution of Spartina alterniflora roots-and-rhizomes (hereafter, roots) to soil volume is measured in VCR mainland marsh soils. Soil cores were collected several different marshes with differing soil types (mineral vs peaty). The cores were scanned by computer-aided tomography and image processing was used to determine the volume of living roots. Our results show that CT imaging may also be used to quantify coarse and fine root volume in salt marsh soils and that in peaty soils, coarse roots make an important contribution to soil volume (up to 53% of the soil volume is live roots). The dataset includes an extensive manual of methods, along with instructional videos.
Fiddler crab body size in salt marshes from Florida to Massachusetts, USA at PIE and VCR LTER and NOAA NERR sites during summer 2016.
Bergmann’s rule predicts that organisms at higher latitudes are larger than ones at lower latitudes. Here, we examine the body-size pattern of the Atlantic fiddler crab, Minuca (=Uca) pugnax, from salt marshes on the east coast of the United States across 12 degrees of latitude. We found that M. pugnax followed Bergmann’s rule and that, on average, crab carapace width increased by 0.5 mm per degree of latitude. Minuca pugnax body size also followed the temperature-size rule with body size inversely related to mean water temperature. Because an organism’s size influences its impact on an ecosystem, and Minuca pugnax is an ecosystem engineer that affects marsh functioning, the larger crabs at higher latitudes may have greater per-capita impacts on salt marshes than the smaller crabs at lower latitudes.
VCR LTER Global Positioning System Projects 1992 to 2004
This dataset is a compendium of GPS Data collected by Randy Carlson and collaborators on the Virginia Coast Reserve (primarily), Plum Island and North Inlet. A master data table was extracted by Charles L. Carlson during 2013 that includes all the individual point locations recovered from individual surveys. In addition to the data table, the data is also shared as a .zip file containing a static web page with links to particular projects and the underlying data. To use the data, unzip it and use your web browser to open the index.html file. Web page contents include: American Oyster Catchers on the Virginia Coast Reserve - 2003 Lynette Winters - Salicornia - MSL elevation project Dynamic Evolution of Barrier Island Morphology and Ecology from 1996-2002 Documented Using High -Resolution GPS-GIS Topographic Mapping Surveys, Virginia Coast Reserve (for GSA, Denver, CO Oct 27-30, 2002 Broadwater Tower Overwash Fan Photos - Feburary 15, 2002 Hog Island Bay DGPS Drifter Study 2001 Ray Dueser/Nancy Moncrief Small Mammal GPS/GIS A Topographical History of North Myrtle Island, 1974 to 2001 Ray Dueser/Nancy Moncrief - Highest Elevations on VCR Barrier Islands Myrtle Island Planimetric area, Surface area & Volumetric Calculations 1996-2001 Myrtle, Ship Shoal GIS/GPS UTM Shape Files and Grids Myrtle, Ship Shoal, ESNWR, Shirley, Steelman's Landing Text Files Complete List of All Small Mammal Trap locations 1995 - 2001 Ship Shoal Island Small Mammal Traps 1997 - 2000 LTER Cross-Site GPS Surveys Hobcaw Barony / Baruch Institue SET/GPS Survey, South Carolina, December 2000 PIE/LTER - Plum Island Sound GPS Network, July 1998 Montandon Marsh at Bucknell University, Lewisburg, Pennsylvania 1997 Bathymetric Survey Procedures, Schematic Diagrams and Instructions The following instructions and procedures are used with reference to the Trimble 4000 SE Global Positioning System receiver, the Trimble NavBeacon XL, the Innerspace Digital Fathometer (Model 448) and the Innerspace DataLog wit
Hourly and Daily Climatologies for VCR LTER Weather Stations 1989-2021
This dataset contains daily and hourly climatologies for VCR LTER Weather Stations. Each measurement is summarized with the 5th percentile, 10 percent trimmed mean, and 95th percentile values. The datasets contain climatologies for each station, as well as for all data combined. The dataset also contains R scripts used to obtain these climatologies.
VCR bay depth and seagrass shoot density data for parameterization of GEOMBEST++Seagrass
Data from the Virginia Coast Reserve relating bay fetch-depth and seagrass density-depth used to parameterize GEOMBEST++Seagrass for simulations investigating coupled barrier-marsh-bay evolution. DepthFetch data table: Length, depth, and type (seagrass or bare sediment) of all bathymetric transects used to construct the depth-fetch lookup table in the model. Transects were extracted from all VCR basins using the bathymetry from Richardson et al. (2014 doi:10.6073/pasta/63a22558d6650fae8232b6a8814a90d5), vary in length, and run with the dominant wind direction from basin margin to basin margin. ShootDensity tab: Shoot densities of restored Zostera marina plots in Hog Island Bay binned by depth for years 3-6 of seeding. Data originally from McGlathery (2013 doi:10.6073/pasta/5a6ea442cf59cabb3112bb634a968ae5). The maximum density of each bin is used as a representative shoot density based on depth.
Figure 3 in Analysis of VCR images of pre-oviposition and oviposition behaviour of Culex quinquefasciatus (Diptera: Culicidae) females, in the laboratory
Figure 3. Pre-oviposition and oviposition behavioural sequences of Culex quinquefasciatus gravid females in response to grass infusion after landing on the habitat inner walls.
Figure 2 in Analysis of VCR images of pre-oviposition and oviposition behaviour of Culex quinquefasciatus (Diptera: Culicidae) females, in the laboratory
Figure 2. Variation of the relative frequency (%) of the oviposition times of Culex quinquefasciatus during scotophase in laboratory.
Figure 4 in Analysis of VCR images of pre-oviposition and oviposition behaviour of Culex quinquefasciatus (Diptera: Culicidae) females, in the laboratory
Figure 4. Pre-oviposition and oviposition behavioural sequences of Culex quinquefasciatus gravid females in response to grass infusion after landing directly on the infusion surface.
Figure 1 in Analysis of VCR images of pre-oviposition and oviposition behaviour of Culex quinquefasciatus (Diptera: Culicidae) females, in the laboratory
Figure 1. Mean raft number of Culex quinquefasciatus observed for gravid females, artificial blood feeding in laboratory conditions.
Bortezomib (VELCADE), Cladribine and Rituximab (VCR) in Mantle Cell Lymphoma (PSHCI 10-011)
ClinicalTrials.gov study NCT01439750. IPD Sharing: UNDECIDED. Countries: 1. Publications: 1.
Phase II Study of VcR-CVAD With Rituximab Consolidation and Maintenance for Untreated Mantle Cell Lymphoma
ClinicalTrials.gov study NCT00581776. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Vertebral Column Resection (VCR) in Congenital Kyphoscoliosis (CKS)
ClinicalTrials.gov study NCT03524027. IPD Sharing: NO. Countries: 0. Publications: 10.
Safety and Efficacy of Entospletinib (ENTO [GS-9973]) Combined With Vincristine (VCR) in Adult Participants With Relapsed or Refractory B-cell Non-Hodgkin Lymphoma (NHL)
ClinicalTrials.gov study NCT02568683. IPD Sharing: Not stated. Countries: 2. Publications: 0.
Vibrotactile Coordinated Reset (VCR): A Treatment for Early Stage Parkinson's Disease
ClinicalTrials.gov study NCT05545826. IPD Sharing: Not stated. Countries: 1. Publications: 0.
VCR sensitive B-ALL
GEO Series GSE657. Homo sapiens. 75 samples. Type: Expression profiling by array.
VCR resistant B-ALL
GEO Series GSE658. Homo sapiens. 29 samples. Type: Expression profiling by array.
Vibrotactile Coordinated Reset (vCR) for the Treatment of Advanced Parkinson's Disease Patients Who Have Previously Received vCR Stimulation
ClinicalTrials.gov study NCT06559098. IPD Sharing: Not stated. Countries: 0. Publications: 0.
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OpenNeuro
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