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Factors that Influence Population Size (Abiotic (Space, Temperature,…
Factors that Influence Population Size
Density Dependent
Competition for Resources
Food, Water, Oxygen, etc
Predation
More resources for 1 species means less resources for another species
Parasitism
One Species benefits while harming another
Disease
Densely populated ecosystems allow disease to spread quickly
Biotic
Cyclical Oscillations
Population Size changes predictably in a cycle
Density-Independent
Natural Disasters
Droughts, Floods, Fires, etc
Pollution in Environmen
t
Use of Pesticides & man made pollution
Quality of Nutrients
Lower quality affects population growth & size
Abiotic
Space
Temperature
Altitude
Amount of Sunlight in the environment