ENVIRONMENTAL STUDIES - population size = total
Population ecology number of individuals in a
- ecology = study of population
interactions of organisms w/ - can increase/decrease w/ a
their physical and biological change in:
environments and how these natality – birth rate in
determine distribution + make animals or production of
up of populations within an seeds in plants
ecosystem mortality – death rate
- population ecology is immigration – individuals
concerned w/ fluctuations in move into a population
size of a population and and stay there
factors, both physical + social, emigration – individuals
that regulates these leave a population and
fluctuations don’t return
- organism = individual form of - for humans:
life, such as bacterium, birth rate = number of
fungus, plant or animal, births per 1000 people in a
composed of a single cell or a year
complex of cells that are death rate = number of
capable of growing and deaths per 1000 people
reproducing per year
- individual = single organism - populations will therefore:
capable of independent grow when birth +
existence immigration exceed death
- species = group of closely + emigration
related organisms that are decline when death +
very similar to each other and emigration exceed birth +
usually capable of immigration
interbreeding and producing remain stable when birth +
fertile offspring immigration approx. equal
- population = group of death + emigration
organisms of same species in - in a closed population, w/ no
same area that can breed immigration or emigration,
freely w/ each other only parameters affecting
- community = group of diff population numbers will be
species that inhabit and births or deaths, e.g. fish in a
interact in a particular area small pond
- ecosystem = communities
together w/ the non-living How is the growth of a
things in their surroundings population regulated?
- biosphere = part of earth - if few individuals enter an
where living organisms are unoccupied area w/ no
found shortage of food/other
resources and no predators,
What affects the size of a will reproduce and number of
population? individuals will increase
exponentially
1
Population ecology number of individuals in a
- ecology = study of population
interactions of organisms w/ - can increase/decrease w/ a
their physical and biological change in:
environments and how these natality – birth rate in
determine distribution + make animals or production of
up of populations within an seeds in plants
ecosystem mortality – death rate
- population ecology is immigration – individuals
concerned w/ fluctuations in move into a population
size of a population and and stay there
factors, both physical + social, emigration – individuals
that regulates these leave a population and
fluctuations don’t return
- organism = individual form of - for humans:
life, such as bacterium, birth rate = number of
fungus, plant or animal, births per 1000 people in a
composed of a single cell or a year
complex of cells that are death rate = number of
capable of growing and deaths per 1000 people
reproducing per year
- individual = single organism - populations will therefore:
capable of independent grow when birth +
existence immigration exceed death
- species = group of closely + emigration
related organisms that are decline when death +
very similar to each other and emigration exceed birth +
usually capable of immigration
interbreeding and producing remain stable when birth +
fertile offspring immigration approx. equal
- population = group of death + emigration
organisms of same species in - in a closed population, w/ no
same area that can breed immigration or emigration,
freely w/ each other only parameters affecting
- community = group of diff population numbers will be
species that inhabit and births or deaths, e.g. fish in a
interact in a particular area small pond
- ecosystem = communities
together w/ the non-living How is the growth of a
things in their surroundings population regulated?
- biosphere = part of earth - if few individuals enter an
where living organisms are unoccupied area w/ no
found shortage of food/other
resources and no predators,
What affects the size of a will reproduce and number of
population? individuals will increase
exponentially
1
