Concepts

Constraint on growth or reproduction due to insufficient availability of essential nutrients

Age and sex characteristics affecting susceptibility to mortality

Taxa that are significantly associated with particular habitat conditions and can be used to assess ecosystem state or restoration success

Chemical cues released by predators that benefit prey by providing information about predator presence

The process by which non-native species become established and spread in new environments

Downstream movement of benthic invertebrates in flowing water either naturally or induced by disturbance

Low nutrient conditions that select for microorganisms adapted to low substrate availability

Production of extracellular polymeric stalk material by diatoms when photosynthetic rates exceed cellular growth rates

Quantitative collection methods for invertebrates living on or in stream bottom substrates

The hypothesis that relationships between egg and juvenile densities are linear when egg densities are constrained below values where eggs or hatching juveniles suffer density-dependent losses

Body size when organisms transition from growth to reproduction, with important consequences for lifetime reproductive success

The relative proportions of chemical elements in biological systems

The proportion of cells undergoing division within a population

Male-first flowering phenology where flowers function first as males then as females

Some environments will be resource rich and produce a high amount of offspring (sources) while other environments will be resource low and produce a low amount of offspring (sinks)

A principle stating that allele and genotype frequencies remain constant in a population under certain conditions

Human-made structures mimicking beaver dams implemented in restoration projects to slow flow, aggrade sediment, and reconnect streams to floodplains or create wetland conditions

Daily behavioral pattern where aquatic organisms move vertically in the water column, typically showing different activity levels during day versus night periods

the rate of nutrient excretion per unit body mass of an organism

Measure of how effectively a sampling method captures target organisms relative to processing time and effort

The hypothesis that disposing of excess dietary nutrients imposes a growth cost on organisms, creating hump-shaped relationships with diet stoichiometry

Ephemeroptera, Plecoptera, and Trichoptera orders used as indicators of aquatic ecosystem health

Non-random mating where individuals preferentially mate with similar individuals

Physical structure and arrangement of beaver ponds, specifically comparing single isolated ponds versus terraced series of connected ponds

Organic material found in pond sediments that serves as nutrient storage compartment

Population estimation method using repeated sampling to remove individuals and estimate total abundance from decline curve

Daily patterns in organism behavior, with some mayfly species showing increased drift activity at night to minimize exposure to visual predators

Use of electrical current to temporarily stun aquatic organisms for collection without physical substrate disturbance

Physical habitat constraints related to water flow and stream geomorphology that affect oviposition site availability

Patterns of stream flow including magnitude, timing, and duration of high and low flow periods

The downstream transport and repeated cycling of nutrients through uptake and release in stream ecosystems

Algae growing attached to surfaces such as decomposing plant material

The removal of phosphorus from the water column by organisms for metabolic processes

The rate at which predators consume prey, measured as prey mortality per predator per unit time

Habitat structure that provides protection from predation by offering shelter or hiding places

Interspecific interactions between caddisfly larvae and their predators affecting case size and behavior

The ability to maintain fitness after damage, measured through both genetic and environmental components of tolerance including resource acquisition and storage traits, and traits involved in pollinat...