Carrying Capcity Review LS2.1

Multiple Select

The graph pictured here shows:

• Zero Growth

• Exponential Growth

• Linear Growth

• Logistic Growth

Multiple Choice

Exponential growth is caused by

• limited resources

• an abundance of resources

• competition

• limiting factors

Multiple Choice

Competition begins when a population reaches its carrying capacity.

• True

• False

Multiple Choice

What is the carrying capacity of the population approximately?

• 150

• 200

• 250

• 300

Multiple Choice

During which year did the population reach its carrying capacity?

• 1

• 2

• 3

• 4

Multiple Choice

About how many years did the population remain at its carrying capacity?

• 1

• 2

• 3

• 4

Multiple Select

Which of the following shows a density independent limiting factor?

• Predation

• Disease

• Competition

• Human activities

Multiple Choice

What is the carrying capacity of the population?

• 20

• 40

• 60

• 80

Multiple Choice

When a specific population grows past the ecosystem's carrying capacity, what happens to the population?

• Density Independent limiting factors start to occur resulting in the population going farther above carrying capacity.
• Density Dependent limiting factors start to occur resulting in the population going back below carrying capacity.
• The population will go extinct due to lack of resources
• The population grows then finds a new carrying capacity

Multiple Choice

The total number of individuals a habitat can survive with the resources it has available.

• Carrying capacity
• Limiting factors
• Resources
• Population

Multiple Choice

Excessive amounts of rain caused a flood in the southwest United States that resulted in substantial amounts of deaths in the rabbit population? This situation is an example of a density _____________ limiting factor.

• density-independent
• density-dependent
• density- too high
• density- too low

Multiple Choice

An environmental factor such as storms and extreme heat or cold that decrease a population are considered to be. 

• density- dependent factor
• population density
• dispersion
• density- independent factor

Multiple Choice

A lion and a cheetah attempt to occupy the same niche. The more aggressive lion survives; the cheetah does not.

• Density-Dependent: Competition

• Density-Independent: Competition

• Density-Dependent: Predator-Prey

• Density-Independent: Predator-Prey

Multiple Choice

All the biotic and abiotic factors and the interactions among them in a given area

• Interdependent Relationship

• Carrying Capacity

• Ecosystem

• Competition

Limiting Factors

​What are they in a nutshell?

They are reasons that may prevent a population of a species from thriving and reproducing. Having said this, it is important to understand that limiting factors will sometimes decrease population sizes, while other populations may thrive and even OVERPOPULATE an area.

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​WHAT ARE LIMITING FACTORS?

​All living things need food, water, shelter and space to survive. As long as organisms have all of these things available to them their population will continue to grow. However, populations cannot grow forever. Some form of environmental resistance will stop the population’s growth. The form of environmental resistance is called a limiting factor since it limits the population. However, limiting factors may also increase a population.

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​REMEMBER!!!

Limiting factors will either LIMIT or INCREASE the size of a population. The ideal size of a population is

• The carrying capacity number (the number of individuals that​ an area can support) OR

• Slightly BELOW the carrying capacity number

• A population size that exceeds the carrying capacity number may damage the health of a local ecosystem. When there are too many individual of a species in a given area, the area is OVERPOPULATED! Too few individuals of a species, the area is UNDERPOPULATED

Subject | Subject

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​Density-independent factors have an impact on the population, whether the population is large or small, growing or shrinking. The size of a population does not matter! The limiting factor will effect a species population whether there are 1 individual or 100s of individuals.

​Independent

Limiting factors where the effects on the size or growth of a population vary with the density of the population itself.

​Dependent

Density Dependent and Independent Factors!

​Density-independent factors are normally abiotic factors.

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• Weather, natural disasters, altitude, pollution, ​human activity such as mining or urban construction (building of roads and structures)

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​Independent

Density Dependent factors are normally BIOTIC factors- having to do with living things.

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• Food availability, predation, ​competition between individuals for food and shelter.

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​Dependent

Density Dependent and Independent Factors!

Multiple Choice

Mountain chickadees compete for a special kind of nest site—tree holes. These little cavities are excavated and then abandoned by woodpeckers. Scientists who added new nest sites in one expanse of forest saw the chickadee nesting population increase significantly.

What limiting factor helped the population INCREASE?

• baby chickadees

• tree holes nests

• seasons

• weather

Multiple Select

A devastating tornado ripped through Townsville and hit the nuclear powerplant. This cause a meltdown that polluted the environment with deadly radiation. The population of humans had to relocate to the neighboring town of Springfield. The local animal populations became sick and the plants populations began to suffer.

What are the limiting factors (there are TWO) in this scenario?

• The tornado

• The humans

• Radiation pollution

• animals and plants

Multiple Select

A small furry rodent found in eastern Greenland is called the collared lemming. The population goes through a boom-and-bust cycle every four years. The lemming population grows to as much as 1,000 times its initial size, then crashes. When the lemming population is very large, the predator populations also increase. This increase in predator populations are what leads to the population crash.

Are these limiting factors dependent or independent?

• dependent

• independent

Poll

Do you feel comfortable with carrying capacity and limiting factors?

• yes

• no

• somewhat