Concepts

All (847)Explore Concept Graph

847 concepts

measurement

dissolved As

biogeochemistry1 paper
measurement

dissolved noble gases

hydrology1 paper
measurement

dissolved rhenium yields

biogeochemistry1 paper
measurement

distance from Festuca

landscape1 paper
measurement

distance from water

Spatial measurement of proximity to water sources as habitat variable

landscape1 paper
measurement

diversions

hydrology1 paper
measurement

dividing line

landscape1 paper
measurement

dormant season climate

Climate conditions outside the growing season when plants are not actively growing

climate1 paper
measurement

double bond equivalence

biogeochemistry1 paper
measurement

ecological dominance

Having the greatest foraging success relative to abundance in the environment

community ecology1 paper
measurement

economic benefits

general ecology1 paper
measurement

effective Uranium

Measurement of radiation damage in a crystal defined as [U] + .235*[Th]

methodological1 paper
measurement

effective porosity

The fraction of pore volume in rock that contributes to fluid flow, excluding isolated or dead-end pores

hydrology1 paper
measurement

electrical resistivity

A measure of how strongly a material opposes the flow of electric current, inversely related to electrical conductivity

geophysics1 paper
measurement

elemental analysis

methodological1 paper
measurement

elemental imbalance

biogeochemistry1 paper
measurement

emissivity

The efficiency with which a surface emits thermal radiation, affecting thermal imaging measurements

methodological1 paper
measurement

end member contributions

hydrology1 paper
measurement

end-member concentrations

biogeochemistry1 paper
measurement

entropy

A measure of noisiness in alarm calls, quantified using deterministic chaos analysis

methodological1 paper
measurement

environmental quality

A latent variable representing overall environmental suitability that affects multiple demographic processes simultaneously

general ecology1 paper
measurement

exposure ages

methodological1 paper
measurement

extractable metals

Iron and manganese recovered by acid extraction, indicating metals available for microbial electron transport processes

biogeochemistry1 paper
measurement

eye size

methodological1 paper
measurement

false color imagery

Satellite or aerial imagery that uses non-visible light wavelengths to enhance vegetation detection

remote sensing1 paper
measurement

fat stores

population ecology1 paper
measurement

fecal GCM levels

population ecology1 paper
measurement

fecal matter area

methodological1 paper
measurement

female kin density

The number of related breeding females (coefficient of relatedness >0.125) using the same locality as the focal female

population ecology1 paper
measurement

fission-track radiography

A technique that identifies areas within a thin section that have elevated uranium concentrations by placing mica over thin sections and irradiating in a nuclear reactor to create fission tracks viewa...

methodological1 paper
measurement

fitness components

Three key early life history fitness components: germination success, probability of survival of seedlings, and time until mortality for seedlings

population ecology1 paper
measurement

flight activity

general ecology1 paper
measurement

flight initiation

The behavioral initiation of flight activity in response to environmental conditions, particularly temperature

general ecology1 paper
measurement

floating chamber technique

Method for directly measuring gas flux by monitoring concentration changes in enclosed chambers placed on water surface

methodological1 paper
measurement

floodplain scale

landscape1 paper
measurement

floral bullseye size

community ecology1 paper
measurement

floral longevity

The duration flowers persist on plants, typically 4-5 days for Corydalis caseana

population ecology1 paper
measurement

flower vibration

Physical oscillations of flowers caused by air movement from pollinator wing beats

methodological1 paper
measurement

foliar traits

Leaf-level characteristics including nitrogen content, carbon content, leaf mass per area, and water content that can be measured and mapped using spectroscopy

community ecology1 paper
measurement

footprint measures

Metrics that sum up accumulated change over time, reducing historical processes to single data points

general ecology1 paper
measurement

foraging trips

population ecology1 paper
measurement

forest fuel loads

Quantified biomass of combustible material including duff, litter, and downed woody debris classified by time to ignition

climate1 paper
measurement

forest productivity

Rate of forest growth and biomass accumulation, often measured through tree ring widths or forest inventory data

general ecology1 paper
measurement

formation potential

biogeochemistry1 paper
measurement

formation potential testing

Standardized laboratory procedure to quantify the potential for organic matter to form disinfection byproducts under controlled chlorination conditions

methodological1 paper
measurement

frequency of stalked cells

The proportion of cells producing stalks within a population, used as a metric for stalk production activity

methodological1 paper
measurement

functional evenness

community ecology1 paper
measurement

fungal community composition

Diversity and abundance of fungal morphotypes colonizing organic substrates

community ecology1 paper
measurement

geometric morphometrics

Statistical analysis of shape variation using landmark coordinates

methodological1 paper
measurement

giving up density

A common method used to measure a rodent's perception of potential gain versus cost in foraging decisions

population ecology1 paper