Environmental Studies
Pg. 1 - 36
,Population Ecology
• Ecology
• The study of the interactions of organisms with their physical and biological
environments
• Population ecology
• Concerned with the fluctuations in the size of a population and the factors
that influence them
• Populations
• A group of the same species
• Community
• Different populations in the same area
,Population Ecology
• Ecosystem
• Made up of groups of different species of organisms that interact with each
other and the environment
• Biosphere
• All the ecosystems on earth
!!Terminology is very important in this chapter!!
, Population Ecology
• Population size
• The total number of individuals in a population
• Influenced by
• Natality or birth rate
• Mortality or death rate
• Immigration
• Emigration
• A closed population cannot have immigration and emigration and so
they are only affected by birth and death rate.
Pg. 1 - 36
,Population Ecology
• Ecology
• The study of the interactions of organisms with their physical and biological
environments
• Population ecology
• Concerned with the fluctuations in the size of a population and the factors
that influence them
• Populations
• A group of the same species
• Community
• Different populations in the same area
,Population Ecology
• Ecosystem
• Made up of groups of different species of organisms that interact with each
other and the environment
• Biosphere
• All the ecosystems on earth
!!Terminology is very important in this chapter!!
, Population Ecology
• Population size
• The total number of individuals in a population
• Influenced by
• Natality or birth rate
• Mortality or death rate
• Immigration
• Emigration
• A closed population cannot have immigration and emigration and so
they are only affected by birth and death rate.
