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Influences on Population Size - Coggle Diagram
Influences on Population Size
Influences on Growth
Biotic Potential
Maximum growth rate under ideal conditions
Immigration and Emigration
Immigration is the arrival of new residents that previously belonged to another population
Emigration is the loss of the individual
Migration
Influences on Decline
Density-Dependent Factors
Factors that impact population
growth based on the size
of the population.
Resource competition
Limited resources can cause intraspecific competition. Recourse competition between members of the same species and population.
Individuals compete for food, shelter, water, and mates.
Ecosystems have a carrying capacity- that is the maximum number of individuals that can live in an area.
Carrying capacity can change over time and be influenced by outside factors.
Predation
Predators increase in population where prey is abundant.
Disease
The closer individuals are to each other the more likely disease are parasites spread.
Increase in populations can lead to an increase in waste, which can cause an increase in pathogens.
Logistic Growth
Density-Independent Factors
Factors that impact populations size
regardless of the population size.
Can cause abrupt and dramatic shift in population sizes.
Natural Disasters
Volcano
Hurricanes
Tsunamis
Other weather related events
Human Made Disasters
Oil Spills
Pollution
Industrial Accidents
Influence population size, density, and distribution.