sap well density
The number of active sap wells created by sapsuckers per unit area
sapsucker damage
Horizontal rows of rectangular scars left by sapsuckers drilling sap wells in tree trunks
saxicolous lichens
Lichens that grow on or within rocks, either foliose growing on top or crustose growing within the rock
scent emission
scientific identity
The extent to which students see themselves as scientists and as members of the scientific community.
scientific productivity
Quantitative measures of scientific output including presentations, publications, and academic awards
scientific self-efficacy
The extent to which students are confident in their ability to carry out various science research practices, such as developing a hypothesis to test.
secondary production
The flux of energy through a stream invertebrate by altering individual life-history and development patterns
self-efficacy
sensor placement and orientation
septal count
shear velocity
shortage declaration
signal recognition
Automated methods for detecting and classifying acoustic signals
silicon exports
sinigrin concentration
skeletochronology
The most commonly used method for aging amphibians that utilizes stained cross-sections of toe bone to allow visualization of lines of arrested growth (LAG)
snow-covered area mapping
Remote sensing technique to identify and quantify spatial extent of snow cover using satellite imagery
social position
social utility
socioeconomic status
The social standing or class of an individual or group, often measured as a combination of education, income and occupation
soil respiration temperature sensitivity
The degree to which soil carbon dioxide efflux rates change with soil temperature, typically quantified as Q10 or temperature response function parameters
soil thickness
Depth of mobile regolith layer from land surface to bedrock contact, controlling water, carbon, and nutrient dynamics
solid TOC
solid-phase microextraction
A sampling technique using polymer-coated fibers to extract and concentrate volatile organic compounds from headspace for analysis
solitary
soluble reactive phosphorus
The dissolved phosphorus fraction immediately available for biological uptake, measured as the proximate cause of bloom formation
song repertoire size
The number of distinct syllables, phrases, or song types produced by an individual or population
soundscape
The complete acoustic environment consisting of biotic and abiotic sounds
space-use overlap
measure of which individuals share critical resources of burrow sites and foraging areas
spallation surface production rate
specific differential phase
Range derivative of the propagational component of differential phase shift, intrinsically dependent on particle size and number concentration
spectral sensitivity
The relative efficiency of the eye to be stimulated and detect light or other signals, as a function of the wavelength of the signal
spermatheca
Specialized female reproductive organ for sperm storage, appearing as translucent pearl-white bean-shaped structure between bursae
spinescence
spirotheca
spore production
stable isotope enrichment
A technique using heavy nitrogen isotopes to mark developing organisms by enriching their environment, allowing tracking of movement between habitats
stage height
start of season (SOS)
starting zone aspect
state variables
stem number
stream gains and losses
structural size
subjective personality ratings
Method using observers to score individuals on trait adjectives rather than quantifying specific behaviors
subjective ratings
synchronous vs asynchronous programming
synchrotron radiation
High-brightness X-ray source generated through the interaction of relativistic electrons with high magnetic fields
taxonomic richness
Number of macroinvertebrate families per wetland
