Human Populations

A group of organisms of the same species in a given area

• population

• community

• ecosystem

• biome

A Factor that would increase the size of the population

• Emmigration

• Death Rate higher than Birth Rate

• Birth Rate Higher than Death Rate

• Drought

A factor that influences the size of the population, despite how crowded it is

• Density Dependent Factor

• Limiting Factor

• Disease

• Density Independent Factor

Tags

NGSS.MS-LS2-4

A factor that is more likely to affect crowded population much more than spread out population

• Density Dependent Factor

• Limiting Factor

• Natural Disaster

• Density Independent Factor

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

An example of a density dependent factor

• Natural Disaster

• Disease

• Density Independent Factor

• Height of Individuals

Tags

NGSS.MS-LS2-2

A factor that decreases the population or keeps it from increasing

• Limiting Factor

• Food Surplus

• High Birth Rate

• Carrying Capacity

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Example of a density independent factor

• Natural Disaster

• Disease

• Resource Availability/Competition

• Predators

Tags

NGSS.MS-ESS3-2

A baby tree cannot get enough light because other trees around it are close and block sunlight

• Density Dependent Factor: Competition

• Density Independent Factor: Competition

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A severe frost wipes out the citrus crop in Florida

• Density-dependent

• Density-independent

Tags

NGSS.MS-ESS2-5

NGSS.MS-LS2-4

Due to severe overcrowding in an Asian village, many children to not survive to reach adulthood.

• Density-dependent

• Density-independent

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4