Concepts

All (847)Explore Concept Graph

847 concepts

measurement

sap well density

The number of active sap wells created by sapsuckers per unit area

population ecology1 paper
measurement

sapsucker damage

Horizontal rows of rectangular scars left by sapsuckers drilling sap wells in tree trunks

methodological1 paper
measurement

saxicolous lichens

Lichens that grow on or within rocks, either foliose growing on top or crustose growing within the rock

community ecology1 paper
measurement

scent emission

general ecology1 paper
measurement

scientific identity

The extent to which students see themselves as scientists and as members of the scientific community.

methodological1 paper
measurement

scientific productivity

Quantitative measures of scientific output including presentations, publications, and academic awards

methodological1 paper
measurement

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.

methodological1 paper
measurement

secondary production

The flux of energy through a stream invertebrate by altering individual life-history and development patterns

population ecology1 paper
measurement

self-efficacy

methodological1 paper
measurement

sensor placement and orientation

methodological1 paper
measurement

septal count

methodological1 paper
measurement

shear velocity

hydrology1 paper
measurement

shortage declaration

hydrology1 paper
measurement

signal recognition

Automated methods for detecting and classifying acoustic signals

methodological1 paper
measurement

silicon exports

biogeochemistry1 paper
measurement

sinigrin concentration

biogeochemistry1 paper
measurement

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)

methodological1 paper
measurement

snow-covered area mapping

Remote sensing technique to identify and quantify spatial extent of snow cover using satellite imagery

hydrology1 paper
measurement

social position

population ecology1 paper
measurement

social utility

methodological1 paper
measurement

socioeconomic status

The social standing or class of an individual or group, often measured as a combination of education, income and occupation

population ecology1 paper
measurement

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

biogeochemistry1 paper
measurement

soil thickness

Depth of mobile regolith layer from land surface to bedrock contact, controlling water, carbon, and nutrient dynamics

hydrology1 paper
measurement

solid TOC

biogeochemistry1 paper
measurement

solid-phase microextraction

A sampling technique using polymer-coated fibers to extract and concentrate volatile organic compounds from headspace for analysis

methodological1 paper
measurement

solitary

population ecology1 paper
measurement

soluble reactive phosphorus

The dissolved phosphorus fraction immediately available for biological uptake, measured as the proximate cause of bloom formation

biogeochemistry1 paper
measurement

song repertoire size

The number of distinct syllables, phrases, or song types produced by an individual or population

methodological1 paper
measurement

soundscape

The complete acoustic environment consisting of biotic and abiotic sounds

landscape1 paper
measurement

space-use overlap

measure of which individuals share critical resources of burrow sites and foraging areas

population ecology1 paper
measurement

spallation surface production rate

methodological1 paper
measurement

specific differential phase

Range derivative of the propagational component of differential phase shift, intrinsically dependent on particle size and number concentration

hydrology1 paper
measurement

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

general ecology1 paper
measurement

spermatheca

Specialized female reproductive organ for sperm storage, appearing as translucent pearl-white bean-shaped structure between bursae

molecular1 paper
measurement

spinescence

general ecology1 paper
measurement

spirotheca

methodological1 paper
measurement

spore production

population ecology1 paper
measurement

stable isotope enrichment

A technique using heavy nitrogen isotopes to mark developing organisms by enriching their environment, allowing tracking of movement between habitats

methodological1 paper
measurement

stage height

hydrology1 paper
measurement

start of season (SOS)

general ecology1 paper
measurement

starting zone aspect

landscape1 paper
measurement

state variables

community ecology1 paper
measurement

stem number

population ecology1 paper
measurement

stream gains and losses

hydrology1 paper
measurement

structural size

population ecology1 paper
measurement

subjective personality ratings

Method using observers to score individuals on trait adjectives rather than quantifying specific behaviors

methodological1 paper
measurement

subjective ratings

methodological1 paper
measurement

synchronous vs asynchronous programming

methodological1 paper
measurement

synchrotron radiation

High-brightness X-ray source generated through the interaction of relativistic electrons with high magnetic fields

methodological1 paper
measurement

taxonomic richness

Number of macroinvertebrate families per wetland

community ecology1 paper