Disturbance
-:- an event, caused by physical, chemical, or biological agents,
resulting in changes in population size or community composition
Reasons for population growth
-:- higher birthrate and lower death rate resulting from: better
healthcare, medicine, smarter choices, technology,
...
✓ -:- Species that specialize in invading newly vacated habitats
fugitive species
✓ -:- A species that can persist in an area only if disturbances occur
regularly, and must therefore disperse from one place to another as
environmental conditions change.
invader species
✓ -:- invade from other areas into new habitats
perturbation
✓ -:- an explicitly defined departure from a normal state
Best definition of disturbance
2|Page | Grade A+| 2024/2025
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