Population Dynamics Flashcards
What is the factors that influence population growth?
Mortality: deaths
Natality: births
Immigration: entering
Emigration: leaving
How to calculate population change?
population change = [natality(n) + immigration(i)] - [mortality(m) + emigration(e)]
How to calculate growth per capita?
per capita growth rate = number final(nf) / number initial(ni)
How to calculate population density?
Density = Number (n) / area (a)
What is the different population growth patterns?
Logistic growth: a model of population growth describing growth that levels off as the size of the population approaches its carrying capacity
Exponential growth: a pattern of population growth in which the population size increases by a fixed rate per a fixed unit of time
Define r-selected
Organisms that have lots of babies, provide little parental care, and typically have shorter life spans
Define K-selected
Organisms that have fewer babies, provide lots of parental care, and typically have longer life span.
How to calculate allele and genotype frequencies (Hardy-Weinberg principle)?
B(squared) + 2Bb + b(squared) = 1
What is a gene pool?
All the genes in a certain population
How does the Hardy-Weinberg principle dictates how gene pools should change over time?
Hardy-Weiberg dictates for gene pools there needs to be a large population, no migration, no mutations, no natural selection, and mating pairs are random. This means the gene pool would not change over time.
How to calculate growth rate?
growth rate(gr) = change of number(n) / time(t)
How to calculate population growth?
Population growth = natailty(n) + immigration(i)
