180 likes | 335 Vues
Populations chapter 5 in text. 3 factors affecting population size. Births Deaths Immigration and Emigration. Growth without limiting factors. Growth without limiting factors. Under ideal conditions a population will show exponential growth What are ideal conditions?.
E N D
3 factors affecting population size • Births • Deaths • Immigration and Emigration
Growth without limiting factors • Under ideal conditions a population will show exponential growth • What are ideal conditions?
Limiting factors can be density-dependent or density-independent • Density-dependent factors are limiting factors that depend on population size • Examples of density-dependent factors: • Examples of density-independent factors:
Growth with limiting factors • Under such circumstances a population show an s-shaped curve, indicating logistic growth
What is “K”? • “K” stands for a concept called carrying capacity, which is the largest number of individuals with in a species that the environment can support.
What are your demographic? • Demographics: the statistical data of a population, especially those showing average age, income, education, etc.
Age-structure diagrams predict future population size, looking at age, gender • Match the countries: US, Germany, Kenya, Italy
Age-structure diagrams predict future population size • Match the countries: US, Germany, Kenya, Italy