non-destructive sampling
Sampling approaches that are often preferable because they require less effort and allow for repeated sampling
non-invasive sampling
A newly developed non-invasive sampling method of using swabs to collect dermal secretions as a rapid and reliable alternative to sample hormones from amphibian species in the field
nondestructive measurement
Plant size measurements that can be taken without destroying or removing the plant
null model
Statistical model that generates random patterns while preserving certain constraints, used as baseline for comparison
number closure
nutrient diffusing substrates
Experimental approach using nutrient-enriched substrates to deliver controlled amounts of nutrients to algae in situ
ocular sampling
Visual interpretation method using high-resolution imagery to manually identify and classify land cover features
operational taxonomic units
Term used to represent each morphospecies of culturable fungi in lieu of species name as species has not currently been established by means of sequencing
optimal control theory
ordinal logistic regression
A regression approach that allows for multiple ordered response categories and provides more specific interpretation of exact probability of socioeconomic characteristics on constraints
outlier detection
Statistical identification of observations that deviate significantly from expected patterns in meteorological data
overlap coefficient
A measure of the degree to which two phenological distributions overlap in time, calculated by integrating the area under both probability density curves
paired watershed study
An experimental design using matched watershed pairs to isolate treatment effects while controlling for natural variation
paleomagnetic data
pan trap sampling bias
The differential attraction of insects to certain colored traps, potentially leading to non-representative samples of the true community
panorama
Large-scale moving or stationary paintings designed to create immersive visual experiences for 19th-century audiences
parallax correction
Geometric correction for apparent horizontal displacement of cloud location due to satellite viewing angle
parallel trends assumption
parent-child spatial relationships
particle orientation
passive treatment
Treatment systems designed to operate with minimal human intervention using natural processes and renewable energy
peer review
The process by which manuscripts are evaluated by expert reviewers before publication
peer-led inquiry
phase contrast
Imaging approach where the detector is placed at a larger distance behind the sample, generating an interference pattern that reflects spatial variation in phase shifts
phase diagram analysis
Method to display cool-season conditions relative to station's period of record using precipitation and snow water equivalent data
phenotypic manipulation
Experimental alterations of traits in factorial combination to allow correlational and other forms of selection to be distinguished from spurious effects on fitness caused by unmeasured characters
pile density
The density of hair (pile) on insect body parts, categorized as low, medium, or high
point intercept method
Vegetation sampling technique using vertical markers to estimate species proportions based on plant contacts
polarization diversity
polarization diversity pulse pair
Radar technique using alternating H and V polarized pulses to estimate Doppler velocity while overcoming decorrelation limitations
polynomial thresholding
Dynamic snow identification algorithm using second-order polynomial curves to determine classification thresholds
postural control
An organism's ability to maintain body position and right itself when flipped, used as indicator of thermal stress
predation bioassay
Experimental method using artificial prey to quantify predation rates in natural environments
predator identification
The process of determining which species are responsible for predation events through direct observation or evidence
predictive model accuracy
The accuracy of predictive models for estimating plant biomass using cross-validation
presence-absence sampling
Sampling approach that records whether a species or habitat type is present or absent at specific locations
project ownership
proloculus
pseudoreplication
Having more than one sample per individual that may bias results
psychophysics
Framework that analyzes perception by measuring changes in behavior with changes in stimulation to understand cognitive processes
quality assurance and quality control
QA/QC process for time-series data involving identification of problems in data, subsequent data cleaning or processing, including outlier detection, gap filling, and data validation
quantum catch data
quantum dot fluorescent labeling
Use of fluorescent nanocrystals to label individual pollen grains for tracking movement between plants
radial cell length
radioimmunoassay
Laboratory technique using antibody-antigen binding and radioactive tracers to measure hormone concentrations in biological samples
radiometric calibration
randomized block design
Experimental design that groups experimental units into blocks to control for sources of variation while randomizing treatments within blocks
range height indicator scan
Radar scanning strategy that measures at constant azimuth across varying elevation angles
rapprochement
Process where LAG becomes more tightly compacted as a result of reduced growth rate, creating difficulty in accurately deducing the number of LAG
record linkage
The process of identifying coreferent records both between and within files in the absence of a unique identifiable attribute
