Population Ecology

Pictured are gannets roosting on a cliff side.

Which of the following are limiting factors that gannets might experience?

• Nesting space

• Food

• Hurricane

• All of the above

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Looking at the graph of the pigeon population, which statement is TRUE?

• The maximum pigeon population was 275

• The largest decrease was between years 4 and 5

• The largest decrease was between years 7 and 8

• The population decreased from years 2 to 3

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is an example of a density-independent (Abiotic) limiting factor?

• food

• parasites

• disease

• pollution

Tags

NGSS.MS-LS2-4

Why don't populations grow indefinitely?

• limiting factors

• only biotic factors

• only abiotic factors

• none of the above

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What are survivorship curves?

• curves that describe the number of survivors over time

• curves that tell us what the limiting factors are

• curve that tells us about the carrying capacity

• a curve

Tags

NGSS.MS-LS4-4

Emigration is

• the movement out of an area

• the movement into an area

• movement in and out of an area

• migration

the number of people in a defined area such as a square kilometre

• population density

• birth rate

• death rate

• population

Tags

NGSS.MS-ESS3-4

Carrying capacity is the ​ (a)   number of organisms that can survive in an area based on the available ​ (b)   , such as food and water.

• maximum
• resources
• minimum
• predators

Tags

NGSS.MS-LS2-1

What two factors decrease the population size?

• Births

• Deaths

• Immigration

• Emigration

Answer explanation

Deaths + emigration (individuals leaving the population) cause the population size to decrease.

What two factors increase the population size?

• Births

• Deaths

• Immigration

• Emigration

Answer explanation

Births + immigration (individuals joining the population) cause the population size to increase.