What are the possible consequences of adding an organism to a food chain?
New competition, possible overpopulation of some species, or altered predator-prey dynamics.
When might an increase in biodiversity lead to a decrease in the stability of an ecosystem?
Invasion by non-native species that increase species count but reduce overall stability.
What happens when an organism is removed from a food chain?
Populations of dependent species decline or increase and the chain may collapse.
What happens to the other organisms in a food chain when an organism in the middle of the food chain is lost?
Species above the lost organism decline due to less food; species below may increase unchecked.
Explain how microevolution and migration can affect an ecosystem.
Microevolution adapts populations to local conditions; migration introduces/removes alleles and can change community composition.
How does a decrease in biodiversity impact an ecosystem?
Ecosystem becomes less stable, more vulnerable to disturbances and disease.
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