die-off
Population collapse event
A die-off is a rapid, widespread death of organisms in a population—typically wildlife, plants, or marine life: The heat wave caused a massive fish die-off in the lake.
The term emphasizes sudden collective mortality rather than gradual decline, often linked to environmental causes like disease, pollution, or climate events.
Large-scale species elimination
- species lossDisappearance of organism types
- extirpationComplete destruction or removal
- disappearanceAct of going missing
- vanishingCeasing to be visible
decimation · collapse · decline · depletion · elimination · eradication · terminal decline · last survivors
Sudden drop in numbers
- ecosystem collapseTotal breakdown of environmental systems
- biodiversity lossReduction in species variety
- mass extinctionLarge-scale species elimination
- habitat destructionEliminating natural living spaces
climate change · overharvesting · invasive species · pollution · resource depletion · carrying capacity · algal bloom · hypoxia
mass extinction
Large-scale species elimination
- species lossDisappearance of organism types
- extirpationComplete destruction or removal
- disappearanceAct of going missing
vanishing · decimation · collapse · decline · depletion · elimination · eradication · terminal decline · last survivors · endangered
population crash
Sudden drop in numbers
- ecosystem collapseTotal breakdown of environmental systems
- biodiversity lossReduction in species variety
- mass extinctionLarge-scale species elimination
habitat destruction · climate change · overharvesting · invasive species · pollution · resource depletion · carrying capacity · algal bloom · hypoxia · dead zone
epidemic
Widespread disease occurrence
contagion · mass mortality · infection · pathogen · virus · bacteria · spread · transmission · culling · quarantine
- environmental harmair pollution, water pollution, pollution, oil spills, acid rain
- extinctionmass extinction, dodo, extinct, extinction event, extinction rate
- eco-disastersclimate collapse, oil spill, ocean warming, coral bleaching, biodiversity loss
- fish killsmass mortality, dead fish, winterkill, winter kill, fish carcass
- wildlife mortalitymortality rate, natural death, natural causes, carcass, carrion
- animal behaviorsswimming, running, walking, jumping, flying
die-offpopulation boom
Rapid increase in people
population explosion · baby boom · proliferation · population growth · repopulation
die-offflourishing
Prospering vigorously
thriving · bloom · blossoming · resurgence · revival
die-offgradual decline
Slow downward trend
slow growth · steady state · equilibrium · stability · sustainability