Concepts

All (3,182)Explore Concept Graph

3,182 concepts

process

extinction vortices

population ecology1 paper
process

extra pair paternity

A female mates with a male other than the territorial male of her family group, increasing frequency when snow cover is reduced

population ecology1 paper
process

extracellular oxidative enzymes

Enzymes produced by microorganisms that catalyze oxidation reactions outside the cell, including laccase, polyphenol oxidase, and peroxidase

biogeochemistry1 paper
measurement

extractable metals

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

biogeochemistry1 paper
process

extractive industries

Industrial operations focused on removing natural resources, particularly whaling and guano mining in oceanic environments

general ecology1 paper
framework

extreme value statistics

Statistical methods for extrapolating rare event magnitudes from historical data

methodological1 paper
measurement

eye size

methodological1 paper
phenomenon

facies changes

general ecology1 paper
process

facilitated exploitation

A phenomenon where the action of one exploiter species opens the opportunity for exploitation by a second species

community ecology1 paper
methodology

factorial bioassay

Experimental approach using multiple factor combinations to test phytoplankton growth responses to nutrient additions

methodological1 paper
concept

facultative endosymbiont

Endosymbiotic bacteria that are not essential for host survival and are maintained at intermediate frequencies.

evolution1 paper
phenomenon

fall streaks

climate1 paper
measurement

false color imagery

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

remote sensing1 paper
phenomenon

false positive redox microsites

methodological1 paper
measurement

fat stores

population ecology1 paper
metric

fatal crashes per 1,000 traffic crashes

methodological1 paper
measurement

fecal GCM levels

population ecology1 paper
measurement

fecal matter area

methodological1 paper
metric

feedback strength

Quantitative measure of the sensitivity of weathering rates to changes in atmospheric CO2, characterized by 1st and 2nd order components

biogeochemistry1 paper
process

feedbacks between mineralogy, weathering rates, soil production, bedrock nutrient availability, soil water-holding capacity, and ecosystem productivity

biogeochemistry1 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
theory

female monopolizability

The degree to which males can control access to females, influenced by factors such as female distribution in time and space

evolution1 paper
phenomenon

female-biased mortality

Disproportionately higher mortality rates in females compared to males within a population

population ecology1 paper
phenomenon

fence collision

population ecology1 paper
process

fermentative DNRA

biogeochemistry1 paper
phenomenon

ferrihydrite nanoparticles

Poorly crystalline Fe oxyhydroxide mineral nanoparticles that are typically the first solid Fe oxyhydroxide phase to form upon oxidation of dissolved ferrous iron

biogeochemistry1 paper
phenomenon

field research disruption

Interruption of field-based scientific research due to external factors such as travel restrictions and facility closures

methodological1 paper
framework

field safety

A worker can reasonably and informedly expect to come home without harm to their physical or emotional well-being and that if harm should occur, that a path toward repair is accessible

methodological1 paper
phenomenon

fine-scale weather variation

Short-term (2-4 week) variation in temperature and precipitation that may interact with long-term climate change effects

climate1 paper
phenomenon

fire suppression

Management practice of preventing or extinguishing wildfires that began in the Rocky Mountains in the late 1880s

landscape1 paper
framework

first principles

methodological1 paper
model type

first-order kinetics

A simplified kinetic model where reaction rates are proportional to the concentration of a single reactant

biogeochemistry1 paper
metric

fish condition

Overall health and nutritional status of fish populations as indicated by relative weight and other bioindicators

population ecology1 paper
process

fish predation

Consumption of aquatic or semi-aquatic insects by fish during oviposition or other water surface activities

community 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
theory

fitness compensation

The need for females in gynodioecious species to compensate for their loss of male function through increased female fitness

evolution1 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
framework

fixed concentration Dirichlet-type boundary condition

methodological1 paper
phenomenon

flatlining

methodological1 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
phenomenon

flood disturbance

High-discharge events that scour stream benthos and reset ecological succession

hydrology1 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
process

flow reversal

Change in water flow direction due to uplift outpacing erosion rates

hydrology1 paper
phenomenon

flower abortion

Premature termination of flower development, typically due to resource limitation or environmental stress

population ecology1 paper
process

flower piercing

community ecology1 paper
measurement

flower vibration

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

methodological1 paper