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Factors of Population Size - Coggle Diagram
Factors of Population Size
Density-Dependent Limiting Factors
Occurs when crowding increases
Results in slower birth rate
Results in higher death rate
Causes Population to Decrease
Included Factors
Predation
Parasites/disease
Competition for limited resources
Has little effect over small populations
Can cause Logistic Growth in large populations
Interspecific Competition
Competition for a resource among same species
Caused by increase in individuals
Some individuals unable to get what they need to survive
Winners of competition have lower energy to reproduce
Included competition in animals
Food
Water
Hiding places
Nesting Sites
Included competition in plants
Nutrients
Water
Access to sunlight
Logistic Growth
Occurs when degree of crowding rises
Occurs when population size rises
Causes a limit in growth
Allows population size to level off at carrying capacity
Carrying Capacity
Maximum number of individuals an environment can support
Density-Independent Limiting Factors
Caused by natural disasters
Fires
Earthquakes
Hurricane
Volcano
Flood
Crowding does not have effect
Likelihood of occurence
Magnitude of the effect