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Population size - Coggle Diagram
Population size
density dependent factors
competition
overcrowding
Max # an environment
can support
carrying capacity
predators
disease
lack of resources
survivorship curves
type 2: straight line
steady rate through life span
lizards/small mammals/large birds
type 3: concave
early death rate peak
marine animals/plants
release a large number of offspring because of this
type1: convex
low until late life
humans/large mammals
per capita growth rate
b-d=r
(b= birth rate
d=death rate)
exponential growth
compounding population each year
addition of outside resident
immigration
permanent loss of residents
emigration
freshwater turtle
Zero population birth
births=deaths
growth rate under ideal conditions
biotic potential
no predators
unlimited shelter/food/resources
no pathogens
highest potential
microbes (bacteria)
affecting factors
offspring load
Natural selection
opportunistic species
r-selection
equilibrial species
k-selection
evolution to avoid predators
fertility window
reproductive age
life history
survival traits
resource allocation
reproduction
