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2,281 results for “laboratories”
Mesoscale variation in fish populations in two small Appalachian streams (fish population data) at the Coweeta Hydrologic Laboratory in 1996
We examined the reach-scale distributions of three fish species to determine which biotic and abiotic factors are influential in the fishes distributions.
Intensive Stream Survey Geomorphology Data from 2010 to 2011 at the Coweeta Hydrologic Laboratory, Otto, NC
From June 2010 until February 2011, fifty streams were surveyed to determine the physical characteristics of streams in forested, traditional land use, and developed settings. Cross-sectional measurements were taken at 16 cross-sections on each reach. The distance between each cross-section was twice the average active channel width (which was determined prior to the survey). At one to three locations within each surveyed reach, slope was determined by placing a laser level at a location upstream and then measuring the amount of elevation change at the water surface. Between each cross-section, the instream habitat was recorded. Large woody debris was measured where it was found within the surveyed reach of the stream. Only LWD with diameter >10 cm was measured. At a representative riffle within the reach, a Wolman pebble count (100 randomly selected pieces of sediment) was taken.
Mesoscale variation in fish populations in two small Appalachian streams (light data) at the Coweeta Hydrologic Laboratory in 1996
We examined the reach-scale distribution of macroinvertebrates to determine if photosynthetically active radiation (PAR) is influential in the distribution of the macroinvertebrates and macroinvertebrate functional feeding groups.
Stream fish assemblage stability in a southern Appalachian stream at the Coweeta Hydrologic Laboratory from 1984 to 1995
Stream fish abundance data was collected seasonally in three 30m sections of stream from 1984 to 1995. Population estimates were obtained using electrofishing (3 pass removal). Habitat availability measurements were recorded biannually along with the electrofishing data starting in fall 1988. Data was collected each fall and spring from 1988-1995, in order to examine changes in fish assemblage structure along the habitat gradient. We used strong inference with Akaike’s Information Criterion (AIC) to assess the processes capable of explaining long-term (1984–1995) variation in the per capita rate of change of mottled sculpin (Cottus bairdi) populations in the Coweeta Creek drainage (USA). We sampled two fourth- and one fifth-order sites (BCA [uppermost], BCB, and CC [lowermost]) along a downstream gradient, and the study encompassed extensive flow variation.
Assessment of parentage relationships in Cottus bairdi at the Coweeta Hydrologic Laboratory in 1999
None submitted by researchers.
Changes in incident light intensity to streams with progressive hemlock mortality at 5 Coweeta Hydrologic Laboratory study sites from 2005 to 2015
The purpose of this study was to document changes in light intensity to streams in areas affected by hemlock mortaity. From June 2005 to November 2015, relative light intensity at 5 locations along each stream reach was monitored every 5 minutes. This study was conducted at Coweeta Hydrologic Laboratory. Five stream sites were located on 1st - 2nd order streams reaches affected by hemlock death. All sites were located in areas that have not been logged since the area became National Forest in the late 1920s and where streams passed through or were adjacent to permanent vegetation plots in which trees were measured in 1934-35, 1969-73 and 1988-93 (Elliott and Swank, 2008.)
Stream salamander mark-recapture abundance study at the Coweeta Hydrologic Laboratory, Otto, NC.
Mark-recapture data of the stream-dwelling plethodontid salamander species located in six streams within the Coweeta LTER site. The data covers the periods of May to August 2007 and 2008. Animals were either captured and given an individual mark using elastomer dye, or simply counted if animals were too small in size to mark. Animals were captured within 10, 1 m^2 plots within each stream using a 40 X 40 cm mesh bag filled with hardwood leaf litter, or by dipnet within each plot. Animals were identified, measured, marked, and released directly following capture.
Stem temperature in watershed 02, ridge plot at the Coweeta Hydrologic Laboratory from 1996 to 1998
Tree stem temperature is currently being collected to determine both diurnal and seasonal variation in tree stem temperatures for all species and sizes present at the Coweeta Watershed 2 Ridge Carbon Flux Plot. The purpose of the data is to characterize the tree stem temperature regimes as they relate to tree stem respiration. Data will continue to be collected until approximately December 1997. Data will then be subsequently summarized and published.
The importance of crayfish in the breakdown of rhododendron leaf litter at the Coweeta Hydrologic Laboratory in 1999
Rhododendron (Rhododendron maximum) is a common evergreen shrub in riparian areas of the southern Appalachians, where its leaves can comprise a large proportion of leaf litter in streams. However, they are relatively refractory and generally considered a low quality food resource for detritivores. Our objective was to assess whether macroconsumers (primarily crayfish (Cambarus bartonii)) influence rhododendron leaf breakdown in a forested southern Appalachian stream in both summer (when leaves other than rhododendron are relatively scarce) and autumn (when other leaves are relatively abundant). We conducted two leaf decay experiments, one in summer and one in autumn, using pre-conditioned leaves. Macroconsumers were excluded from the benthos of a fourth-order stream using electric fences; we predicted that excluding macroconsumers would reduce the decay rate of rhododendron leaves in both summer and autumn.
Top-down interactions in streams draining human-modified landscapes at the Coweeta Hydrologic Laboratory from 1997 to 1998: Gradient algae data
Spatial and temporal variability of consumer-controlled forces have been the subject of much debate in ecology. To date, most studies considering variability of these top-down interactions have focused on systems minimally impacted by human activities. However, human modification of the landscape is prevalent, and it can significantly affect the strength and outcome of species interactions. The objective of this study was to examine how top-down interactions vary among streams with differing amounts of human disturbance in their watersheds. To address this issue, we experimentally excluded macroconsumers (fishes and crayfishes) from benthic areas of five southern Appalachian streams. These sites represented a range of human watershed development, from 100% to < 50% forested; macroconsumer assemblages at low development sites were dominated by benthic insectivores (Cottus bairdi) and crayfishes, whereas algivores (Campostoma anomalum) and general insectivores (e.g., Notropis leuciodus) were common at more developed sites. Using ceramic tiles as sampling substrates, we compared sediment, algal assemblages (chlorophyll a, AFDM, abundance, biovolume, and composition), and insect assemblages (abundance, biomass, and composition) in macroconsumer exclusion and control areas.
Hydrogeology, Geochemistry, and Groundwater Study within the Coweeta Hydrologic Laboratory, 2006-2010
The primary objectives of the study were to: (1) characterize the ground water geochemistry in a pristine, mountain setting underlain by felsic gneiss and evaluate changes over time and space within the local groundwater system; (2) evaluate the hydraulic communication between the shallow regolith and deeper bedrock flow systems and the local flow dynamics between ground and surface water in both recharge and discharge areas; (3) evaluate the regolith-bedrock transition zone and its role as a preferential groundwater flow pathway; (4) characterize aquifer properties in the regolith and bedrock in selected areas; (5) determine the age of groundwater and time of travel from a recharge area to a discharge area; and (6) track water level fluctuations over time, in response to fluctuations in evapotranspiration, rainfall, and seasonal climate.
Weather data from Screwdriver Knob, Coweeta Hydrologic Laboratory
This data set contains measurements of air temperature, relative humidity, wind speed, wind direction, PAR density, and rainfall from a site located on Screwdriver Knob,Coweeta Hyrdologic Laboratory, Otto, NC. Air temperature, relative humidity, wind speed, and PAR density are measured every 60 seconds with average, minimum, maximum, and discrete top of the hour values saved to the output data table hourly. Wind direction is measured every 60 seconds with the average value saved to the output data table every hour. Hourly rainfall is totalized and a continuous 24 hour rainfall value is calculated. Calculations for dew point, heat index, wind chill, and wind vector are calculated hourly and saved to the output data table.
Coweeta Hydrologic Laboratory and Basin Reference GIS data
Coweeta Basin reference GIS data that were either commissioned or produced by the USDA Forest Service Coweeta Hydrologic Laboratory or the Coweeta LTER starting in the late 1980s.
Living Field Laboratory at the Kellogg Biological Station, Hickory Corners, MI (1992 to 2012)
Dataset Abstract The Living Field Laboratory is a long-term rotation study established in 1993 under the direction of Emeritus Professor Dr. Richard Harwood to evaluate the benefits of cover crops (as green manure) and/or the addition of composted dairy manure in two integrated systems compared to a conventional and an organic system. The LFL accommodates every entry point of the crop rotation each year and has a factorial design that allows for the comparison of a number of interactions. These interactions include: differences in N management, rotation effects, and cover crops. From 1993 through 2005, the rotation consisted of corn (Zea mays L.)/corn/soybean (Glycine max)/wheat (Triticum aestivum) vs. continuous corn. During this period, crimson clover (Trifolium incarnatum L.) was seeded to 1st yr. corn, 2nd yr corn was in rye grass (Lolium multiflorum), soybean had no cover, and red clover (Trifolium pretense L.) was frost-seeded into wheat. In 2006, under the direction of Dr. Sieglinde Snapp and through consultation with a farmer advisory group, the rotation was shortened to a 3 yr rotation of corn/soybean/wheat vs. continuous corn. The remaining plot in each management system was converted to a 2 yr rotation of corn/soybean. Cereal rye (Secale cereale) is now planted after corn regardless of crop rotation. Cereal rye follows soybean in the 2-yr rotation. Red clover is frost-seeded into wheat. The management systems are: Conventional, Integrated Fertilizer and Integrated Compost. Weed management is identical across systems, and nitrogen fertilizer management adjusted to take into account soil N availability and balance nitrogen inputs across treatments. The cover crop is present as a split plot (plus minus) within each system. The split-plot cover crop treatment was established in 1993 in Integrated Fertilizer and in Integrated Compost, while the split-plot cover crop treatment was established 14 years later in 2007 in the Conventional treatment, to allow a comp
Stanford Hopkins Marine Laboratory Offshore Pressure Sensors
<p>RBR bottom-mounted pressure sensor data for two stations located outside of wave breaking. Data details are described within the Matlab files. Data are used to estimated wave characteristics.</p> <p>Data used for manuscript "Wave dissipation by bottom friction on a rough rocky reef" by Gon, MacMahan, and Thornton in submission for JGR Oceans.</p>
Dataset for laboratory experiments of fragmenting rockfalls and rockslides
<p>This data set provides movies for impact-fragmentation of sliding blocks recorded using high-speed camera during laboratory experiments, which can be useful for a thorough understanding of the evolutions of internal rock damages. The calculated data of area covered by deposit, aspect ratio of deposit, the travel distance of the center of mass on the horizontal plane, the travel distance of sliding mass on the horizontal plane, and the relative breakage ratio are also provided. In addition, we also provided the data of velocity profiles of blocks with different structures at t=0.1 s from x=0 m to x = 0.8 m.</p> <p>Dataset_S1. Data of area covered by deposit, aspect ratio of deposit, the travel distance of the center of mass on the horizontal plane, the travel distance of sliding mass on the horizontal plane, and the relative breakage ratio. The velocities of each tests derived from the pictures took by high speed camera (PIVLab code in Matlab is used for those calculation). The deposit parameters was calculated based on digital surface model (DSM) of deposit.</p> <p><br> Dataset_S2. Videos of all tests.</p> <p><br> Dataset_S3. Orthophotos and DSM of deposits for all tests.</p>
Accompanying dataset for "Nappe oscillations on free-overfall structures, data from laboratory experiments (audio and video)"
<p>This dataset accompanies the manuscript "Nappe Oscillations on Free-Overfall Structures: Data from Laboratory Experiments" submitted to Scientific Data.</p> <p>This dataset contains raw audio and video data, which complement the dataset uploaded at: <a href="https://zenodo.org/record/3381078#.XlUGVSFKiUk">https://zenodo.org/record/3381078#.XlUGVSFKiUk</a></p> <p>The names of the folders describe each one of the 52 experiments, with respect to the submitted paper in Scientific Data:</p> <p>- M1 and M2 denote Model 1 and Model 2, respectively.</p> <p>- C and UC denote confined and unconfined nappe, respectively.</p> <p>- QR, THR, HR, R, and RR denote the crest type of the weir as explained in the paper.</p> <p>- W is the width of the crest and L is the falling height.</p>
2013 mapping survey of South African laboratories
<p>Mapping survey of laboratory facilities in South Africa conducted in 2013 as part of the ASSAf project: The State of Biosafety and Biosecurity in South Africa (see <a href="https://www.assaf.org.za/files/reports/evidence_based/Prelims.pdf">https://www.assaf.org.za/files/reports/evidence_based/Prelims.pdf</a>)</p>
Figure 5 in Economically Beneficial Ground Beetles. The specialized predators Pheropsophus aequinoctialis (L.) and Stenaptinus jessoensis (Morawitz): Their laboratory behavior and descriptions of immature stages (Coleoptera: Carabidae: Brachininae)
Figure 5. Habitus (left lateral aspect) of S. jessoensis, first instar; legs not shown.
Figure 16 in Economically Beneficial Ground Beetles. The specialized predators Pheropsophus aequinoctialis (L.) and Stenaptinus jessoensis (Morawitz): Their laboratory behavior and descriptions of immature stages (Coleoptera: Carabidae: Brachininae)
Figure 16. Habitus (left lateral aspect) of P. aequinoctialis, first instar; legs not shown.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.