Key Idea.
Section 1
Dynamic Equilibrium
A population is considered stable when its size remains relatively constant over time. This does not mean the population is frozen; organisms are still dying and being born.
Stability occurs when the number of births equals the number of deaths. This state is known as dynamic equilibrium.
Section 2
Disrupting the System
Ecosystems are sensitive to change. A stable system can become unstable if an external factor (like a storm or temperature shift) disrupts the balance.
When this happens, the number of births and deaths become unequal, causing the population size to shift until a new equilibrium is found.
Expand to review the lesson summary and core properties.
Section 1
Dynamic Equilibrium
A population is considered stable when its size remains relatively constant over time. This does not mean the population is frozen; organisms are still dying and being born.
Stability occurs when the number of births equals the number of deaths. This state is known as dynamic equilibrium.
Section 2
Disrupting the System
Ecosystems are sensitive to change. A stable system can become unstable if an external factor (like a storm or temperature shift) disrupts the balance.
When this happens, the number of births and deaths become unequal, causing the population size to shift until a new equilibrium is found.