extinction vortices
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
extracellular oxidative enzymes
Enzymes produced by microorganisms that catalyze oxidation reactions outside the cell, including laccase, polyphenol oxidase, and peroxidase
extractable metals
Iron and manganese recovered by acid extraction, indicating metals available for microbial electron transport processes
extractive industries
Industrial operations focused on removing natural resources, particularly whaling and guano mining in oceanic environments
extreme value statistics
Statistical methods for extrapolating rare event magnitudes from historical data
eye size
facies changes
facilitated exploitation
A phenomenon where the action of one exploiter species opens the opportunity for exploitation by a second species
factorial bioassay
Experimental approach using multiple factor combinations to test phytoplankton growth responses to nutrient additions
facultative endosymbiont
Endosymbiotic bacteria that are not essential for host survival and are maintained at intermediate frequencies.
fall streaks
false color imagery
Satellite or aerial imagery that uses non-visible light wavelengths to enhance vegetation detection
false positive redox microsites
fat stores
fatal crashes per 1,000 traffic crashes
fecal GCM levels
fecal matter area
feedback strength
Quantitative measure of the sensitivity of weathering rates to changes in atmospheric CO2, characterized by 1st and 2nd order components
feedbacks between mineralogy, weathering rates, soil production, bedrock nutrient availability, soil water-holding capacity, and ecosystem productivity
female kin density
The number of related breeding females (coefficient of relatedness >0.125) using the same locality as the focal female
female monopolizability
The degree to which males can control access to females, influenced by factors such as female distribution in time and space
female-biased mortality
Disproportionately higher mortality rates in females compared to males within a population
fence collision
fermentative DNRA
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
field research disruption
Interruption of field-based scientific research due to external factors such as travel restrictions and facility closures
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
fine-scale weather variation
Short-term (2-4 week) variation in temperature and precipitation that may interact with long-term climate change effects
fire suppression
Management practice of preventing or extinguishing wildfires that began in the Rocky Mountains in the late 1880s
first principles
first-order kinetics
A simplified kinetic model where reaction rates are proportional to the concentration of a single reactant
fish condition
Overall health and nutritional status of fish populations as indicated by relative weight and other bioindicators
fish predation
Consumption of aquatic or semi-aquatic insects by fish during oviposition or other water surface activities
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...
fitness compensation
The need for females in gynodioecious species to compensate for their loss of male function through increased female fitness
fitness components
Three key early life history fitness components: germination success, probability of survival of seedlings, and time until mortality for seedlings
fixed concentration Dirichlet-type boundary condition
flatlining
flight activity
flight initiation
The behavioral initiation of flight activity in response to environmental conditions, particularly temperature
floating chamber technique
Method for directly measuring gas flux by monitoring concentration changes in enclosed chambers placed on water surface
flood disturbance
High-discharge events that scour stream benthos and reset ecological succession
floodplain scale
floral bullseye size
floral longevity
The duration flowers persist on plants, typically 4-5 days for Corydalis caseana
flow reversal
Change in water flow direction due to uplift outpacing erosion rates
flower abortion
Premature termination of flower development, typically due to resource limitation or environmental stress
flower piercing
flower vibration
Physical oscillations of flowers caused by air movement from pollinator wing beats
