Ecosystems Part 2: Population Dynamics

A rainforest area is experiencing a severe drought. As a consequence, the insect population has decreased. What will the insect-eating birds most likely do as a result of the drought?

• stop searching for food until it begins to rain
• begin reproducing to increase population
• move to a new area to find food
• start the process of hibernation

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NGSS.MS-LS2-1

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Which is an abiotic factor that most limits the number of frogs living in a pond? 

• the color of the water 
• the number of predators 
• the temperature of the water 
• the populations of producers 

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NGSS.MS-LS2-1

Which species are best able to occupy the same space?

• those that eat the same foods
• those that compete for the same resources
• those that have a predator/prey relationship
• those whose needs differ significantly from each other

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NGSS.MS-LS2-1

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When an ecosystem is affected by loss of shelter, what happens to the populations in that ecosystem?

• They can decrease or die out
• They are usually not affected
• They can readily adapt to the changes
• The populations increase

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How do biodiversity and sustainability work together?

• The higher the biodiversity, the greater the sustainability.

• The lower the biodiversity the greater the sustainability.

• The higher the biodiversity, the less sustainable the ecosystem.

• Biodiversity has nothing to do with sustainability.

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A group of the same species living in the same area is known as..

• community

• biome

• population

• ecosystem

Which sequence shows increasing ecological levels of organization?

• organism, population, community, ecosystem

• ecosystem, population, organism, community

• community, ecosystem, population, organism

• population, organism, ecosystem, community

A density independent factor that limits the population growth of a species

• Competition

• Predation

• Natural disasters

• Disease

If polar bears prey on seals for food, what will most likely happen to the seal population if polar bears are removed from an area?

• increase

• decrease

• stay the same

• no change

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NGSS.MS-LS2-1

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Limiting factors which impact the size of a population no matter how large that population is.

• Density Independent Limiting Factors

• Density Dependent Limiting Factors

• Exponential Growth

• Carrying Capacity