Concepts
35 concepts
trophic cascade
Indirect effects of predators on lower trophic levels mediated through changes in intermediate consumer behavior or abundance
nonconsumptive effects
Behavioral, physiological, and life-history changes that reduce the risk of predation but have associated energetic or fitness costs to prey individuals and populations
detritus breakdown
The decomposition and fragmentation of dead organic matter by organisms, particularly the conversion of coarse to fine particulate organic matter
facultative paedomorphosis
Alternative life history strategy where some individuals retain larval traits and become sexually mature in aquatic environment while others metamorphose to terrestrial adults
ecosystem engineering
The modification of environments by organisms in ways that influence resource availability for other species, exemplified by beaver dam construction creating pond habitats.
plant-pathogen interactions
Selective pressure relationships between host plants and their parasites that can shift based on environmental changes
cannibalism
Predation behavior where individuals consume members of their own species, particularly common in A. m. nebulosum populations targeting first year hatchlings
prey selection
instar development
The progression through larval developmental stages with associated changes in size and feeding capacity
animal-driven nutrient cycling
The contribution of animals to ecosystem nutrient fluxes through excretion, with supply determined by animal biomass, excretion rates, and time spent in the ecosystem
invertebrate drift
Downstream movement of benthic invertebrates in flowing water either naturally or induced by disturbance
case construction
Caddisfly larvae ability to construct protective cases from environmental debris using silk-like string
detritivore feeding preference
Selective consumption behavior of invertebrates feeding on different types of organic detritus
energy flux
The flow of energy through ecological systems, measured as invertebrate biomass transfer from terrestrial to aquatic environments
insect recruitment
Addition of new individuals to insect populations through successful reproduction and development
stalk production
Production of extracellular polymeric stalk material by diatoms when photosynthetic rates exceed cellular growth rates
biotic associations
Co-occurrence patterns between species that reflect ecological interactions beyond shared environmental responses
bottom-up forcing
animal communication
Mechanisms used by individuals to convey different cues to others, including color, vocal cues, body language, and biofluorescence
drift phase
positive feedback loop
Mechanism where state and behavior mutually reinforce each other, measured as positive correlation between individual intercept and slope in random regression models.
terrestrial subsidies
Input of terrestrial invertebrates into aquatic food webs providing energy to aquatic predators
bioaccumulation
The accumulation of substances like sodium in organisms through their food chain, allowing carnivores to obtain adequate salt from prey
biofilm succession
The sequential development of microbial communities on substrates following disturbance
detritivory
Consumption of dead organic matter by organisms, particularly caddisfly larvae feeding on detritus
detritus shredders
Functional guild of macroinvertebrates that break down dead organic material, contributing to nutrient cycling in aquatic ecosystems
hydro-geomorphological constraints
Physical habitat constraints related to water flow and stream geomorphology that affect oviposition site availability
intraguild predation
Asymmetric intraguild predation (IGP) between caddisflies where larger, faster-growing species prey on smaller competitors
nutrient spiraling
The downstream transport and repeated cycling of nutrients through uptake and release in stream ecosystems
phosphorus uptake
The removal of phosphorus from the water column by organisms for metabolic processes
primary productivity
The production of organic compounds by autotrophic organisms, measured here through chlorophyll-a concentration
stoichiometric homeostasis
transmission dynamics
ecosystem function
The roles that invertebrates play in the flow of energy and cycling of nutrients in wetlands