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Population Size - Coggle Diagram
Population Size
Factors Influencing Growth
Birth rate
higher birth rates increase population size
immigration
Availability of resources
abundance of food and water promote growth
reproductive strategies
r- strategists (high offspring)
k-strategists (low offspring)
Factors Regulating Population
Death rate
Emigration
movement of individuals out of a population
Predation
Competition
intraspecific
compete for limited resources
interspecific
compete for shared resources
Density dependent factors
food availibility
scarcity can limit growth
space for habitat
overcrowding can increase competition and stress
disease spread
more dense populations are at higher risk
Density Independent factors
Climate
Natural disasters
human activities
pollution
habitat destruction
Population Dynamics
Exponential Growth
Rapid increase when resources are abundant
Logisitic Growth
Growth slows as it approaches carrying capacity
Migration patterns
seasonal or permanent movement influences population sizes