DE_LE_1.3.2

DE_LE_1.3.2_What Is the Difference between Density-Dependent and Density-Independent Factors?

By NickBeth Meyer

Affect populations more as the population density increases​
Often a biotic factor
i.e. infectious disease, competition for resources, waste accumulation,

​​Density-Dependent Factor

factors influencing population birth/death rate irrespective of population size; they don't vary w/ population density
Often abiotic factors
i.e. weather, forest fire, pollutant

​​Density-Independent Factor

​​Exponential Growth

Logistical Growth

Drag and Drop

According to the graph, human population growth demonstrates a(n)

Placeholder

growth curve

Drag these tiles and drop them in the correct blank above

exponential

logistical

'r-selected' species

-Exponential Growth Curve

-(refers to rate of increase)
Generally species adapted to unstable habitats

​'k-selected' species -
-Logistic Growth Curve

-'k' is for carrying capacity

-Density-Dependent

Open Ended

What will cause humans to reach carrying capacity and change this curve from an exponential to a logistic growth curve?