Population Balance

The variety of different species of plants and animals in area.

• Speciation

• Biodiversity

• Extinct

• Ecosystem

When the tadpole reduce in number, what would be a possible impact on other organisms in the food web?

• The brown trout will change its feeding habits and begin consuming more fly larvae and dragon fly nymph.

• The duck population will decrease because it has more energy available.

• The mink population will increase because its major predator was reduced.

• The dragon fly nymph population will decrease because one of its energy sources is unavailable.

If a disease killed all the caribou in this tundra food web, how would that affect the polar bear and wolf populations?

• Wolves would be affected more because they are predators of more animals than the polar bears.

• Polar bears would be affected more because they are predators of less animals than the wolves.

• Since both are predators of caribou, the polar bears and wolves would be affected the same.

• Since both are prey for other animals, neither the polar bear nor the wolves would be affected.

The NUMBER of individuals in a certain population.

• Population
• Limiting Factors
• Natural Selection
• Population Density

The largest number of organisms that the environment can support. 

• Carrying Capacity
• Limiting Factor

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NGSS.MS-LS2-1

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Environmental factors that keep a population from increasing. 

• Carrying Capacity
• Limiting Factors

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which is NOT an example of a limiting factor.

• Climate
• Available Food & Water
• Available Space & Shelter
• Species color

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NGSS.MS-LS2-4

When population sizes increases, limiting factors like competition, predation, disease, and parasites start to regulate a populations size. Limiting factors that increase when a population increases are known as ___________.

____________.

• density-independent

• density-dependent

If the population of a certain predator increases, there is often _______.

• a decrease the population of its prey

• an increase of the population of its prey

• no impact found on its prey

If a disease destroys the barley plants in an ecosystem, what would happen to the barley eating bird population?

• The bird population would stay the same

• The bird population would increase

• The bird population would decrease