Waiting on a mule deer crossing…
Standard measurements of bird morphology including wing chord, tail length, tarsus length, and body condition assessment. Birds banded with color combinations and USGS bands for individual identificat...
Calculation of body condition metrics (mass/SVL³) and derived fitness proxies including condition-weighted reproductive opportunities for males and estimated egg production for females based on body s...
Acrylic imprints of leaf surfaces are made on glass slides and analyzed under compound microscope to count stomata and measure their diameters.
Uses array of wireless acoustic sensors with correlation envelope sum (CES) method to precisely locate sources of marmot alarm calls in field settings. Employs cross-correlation analysis and multilate...
Comprehensive ground-based cloud property retrieval using Ka-band radar for cloud boundaries, multifilter radiometry and sun photometry for optical thickness, and thermodynamic profiling for phase det...
Comprehensive measurement of nest tree characteristics and landscape context including tree size, nest height, cavity orientation, and distances to key habitat features. Multi-scale habitat characteri...
Use of ceramic tiles as standardized substrates for measuring benthic algal biomass via chlorophyll-a extraction and fluorometry. Includes grazed vs ungrazed comparisons to assess herbivory effects.
Canopy cover measurement using densitometer to classify habitats as sun (5% shade), deep shade (95% shade), or ecotonal (5-95% shade) environments.
Standard morphological measurements of hummingbird bill dimensions, mandible, and wing chord using digital calipers with duplicate measurements by different observers.
Nutrient addition experiments in benthic substrates and sedge biofilms to measure ecosystem demand through exponential decay models. Measures uptake capacity of different pond compartments.
Forward Looking Infrared thermal photography combined with machine learning data sculpture techniques to visualize temperature patterns in periglacial environments
Systematic characterization of alluvial sediment physical properties through grain size analysis and bulk density measurements to derive hydraulic conductivity, porosity, and van Genuchten parameters ...
Comprehensive measurement of multiple fitness components including survival, reproductive success, fecundity, and growth rates to assess life history trade-offs under resource stress.
Systematic measurement of slope and aspect at grid cell centers using compass and clinometer with clipboard to minimize micro-scale surface variation effects.
Continuous measurement of tree water transport using thermal dissipation sensors with temperature measurements at multiple depths in sapwood to calculate sap velocity via heat pulse methodology.
Mixed-bed ion-exchange resin bags deployed at 5 cm soil depth to assess NO3-N and NH4-N availability. Resins are extracted with KCl and analyzed using flow injection autoanalyzer.
Processing of Landsat NDVI time series to quantify foresummer drought sensitivity as the slope of peak NDVI versus June Palmer Drought Severity Index. Represents plant productivity responses to early ...
Simultaneous measurement of oxygen consumption, body temperature, and conductance in marmots entering torpor to determine mechanisms of metabolic depression. Q10 analysis used to distinguish active me...
Standardized protocol to transfer dust from plant surfaces to microscope slides and count particles in defined areas under magnification. Used to calibrate experimental dust treatments against natural...
Airborne hyperspectral imaging (380-2500 nm) and LiDAR data collection at 1 m resolution, followed by machine learning algorithms to produce aspen cover and cytotype distribution maps.
Post-pollination measurement of ovary size changes as a proxy for detecting fertilization events and ovule development. Uses standardized photography and image analysis to quantify ovary dimensions.
Repeated measurements of plant morphological traits (tillers, leaves, height) and survival tracking to assess fitness responses to experimental treatments.
Measurement of oxygen consumption rates in pore water samples using resazurin as an indicator dye. Samples preserved at 4°C for 24 hours before spectrofluorometric analysis to determine aerobic respir...
Combined vertical (Robel pole) and horizontal (line intercept) measurements to quantify willow habitat structural complexity including height diversity, average height, patchiness, frequency and cover...
Detailed measurement and quantification of sedimentary structure types and their relative abundances in stratigraphic sections, including calculation of stratification ratios.
Tracer Additions for Spiraling Curve Characterization method involving simultaneous injection of water tracer and nutrients with downstream breakthrough curve monitoring to quantify reach-scale nutrie...
Deployment of temperature loggers at multiple depths in aquatic habitats with half-hourly recordings over multi-week periods. Includes post-processing gap-filling using reference gauge data.
Tethered balloon system flights carrying aerosol instruments vertically through the atmospheric column to generate profiles of particle concentrations with altitude. Pseudo vertical columns are constr...
Weekly counts of visitors at a facility to create a traffic volume index as a proxy for vehicle traffic on nearby roads during peak visitation periods.
Measurement of anogenital distance using dial or digital callipers to 1mm accuracy as a proxy for prenatal testosterone exposure and masculinization. Distance measured from centre of genital opening t...
Standardized eddy covariance measurements of carbon dioxide, water vapor, and energy fluxes between ecosystems and atmosphere. Continuous automated measurements providing ground truth data for model t...
Direct measurement of leaf stomatal conductance using porometer to assess plant water stress and physiological responses to watering treatments. Measured during flowering and early fruiting phases.
Non-destructive estimation of leaf chlorophyll concentration using reflectance spectroscopy and vegetation indices.
Stable isotope tracer experiment using 15N-labeled fertilizer to quantify nitrogen uptake rates and allocation in plants growing under different soil treatments.
Calculation of tree biomass increment through repeat diameter measurements combined with allometric equations, plus litterfall collection to estimate total aboveground productivity.
Stream discharge measurement using acoustic doppler velocimetry with systematic cross-sectional velocity measurements integrated to calculate total flow.
Standardized visual scoring system for flower color in Boechera stricta using 6-point scale from 0 (white) to 5 (purple) with intermediate pink/purple categories.
Oriented rock cubes are measured for directional magnetic susceptibility to determine fabric orientation and strength. Principal axes and confidence ellipses calculated using Jelinek statistics.
Visual and quantitative assessment of pond habitat characteristics including depth, vegetation, sediment, and detritus to characterize pond environmental conditions.
Time-lapse cameras and data loggers used to continuously monitor snow melt timing and air temperature to calculate growing degree days and assess treatment effectiveness.
Linear transects used to quantify debris coverage as confirmation of avalanche disturbance impact. Percent debris calculated along fixed-length transects to characterize site conditions.
Excavation and measurement of root systems to develop allometric relationships between aboveground and belowground plant dimensions. Used to estimate below-ground spatial extent from above-ground meas...
Calculation of protist biovolume using length and width measurements to standardize initial biomass across species.
Visual estimation of Didymosphenia geminata biomass using percent cover and height measurements at multiple spatial scales (microhabitat via viewing box, macrohabitat via transect surveys).
Direct measurement of sugar-water consumption in butterflies by weighing individuals before and after feeding events using high-precision scales. Butterflies fed ad libitum on droplets of 1:3 sugar-wa...
Visual assessment of light availability to individual tree crowns using standardized categories from no direct light to completely exposed conditions.
Systematic measurement of individual sizes and abundances within defined community areas to calculate species richness, total abundance, biomass, and metabolic rate. Individual measurements are standa...
Standardized ranking of vegetation cover in quadrats using the established Daubenmire cover class system.
Use of digital photography combined with computer software to accurately count eggs and first instar larvae in butterfly egg clusters. Includes estimation methods for eggs in multiple layers.
Visual size estimation of treehopper nymphs using reference cards with actual nymphs of known sizes glued to cards, calibrated weekly with caliper measurements of sample nymphs.