Population Ecology
. __
Ecology :
Study of interactions of
organisms with their
physical and
biological environments
·
Fluctuations in populations
Physical and Social factors
·
[S
Biosphere : Part of earth where all
living things are
found
Ecosystem Groups of different of
·
:
species organisms
that interact with each other and environment
Individual form of life
Organism
·
:
·
Community Group : of different species that inhabit and
interact in a certain area
·
Species : Group of closely related that
organisms are very
similar and can
usually interbreed succesfully
·
Individual Individual that independantly exist
organism can
:
·
Population Group : of the same species that occupy the
same area and can breed freely!
, Matulation __
Size
·
Total Number of individuals
Affected by
·
:
I
Natality- birth of
offering
·
Mortality-death rate t Open population!
·
-
Immigration Individuals into area
·
-
move
Emigration Individuals leave population ↓
·
-
Environmental-Resistance
Total number of factors that stop a population from
at it's rate
reproducing mascimum
·
Determined by limiting factors
-Density-Endependant Regardless of population size!
-
·
Limit due to natural factors
growth
·
Physical Factors : ·
Catastrophic Events
↳ rainfall ↳
Drought
↳
temperature ↳ Floods
↳
Acidity! ↳ Fire
↳
Humidity
. __
Ecology :
Study of interactions of
organisms with their
physical and
biological environments
·
Fluctuations in populations
Physical and Social factors
·
[S
Biosphere : Part of earth where all
living things are
found
Ecosystem Groups of different of
·
:
species organisms
that interact with each other and environment
Individual form of life
Organism
·
:
·
Community Group : of different species that inhabit and
interact in a certain area
·
Species : Group of closely related that
organisms are very
similar and can
usually interbreed succesfully
·
Individual Individual that independantly exist
organism can
:
·
Population Group : of the same species that occupy the
same area and can breed freely!
, Matulation __
Size
·
Total Number of individuals
Affected by
·
:
I
Natality- birth of
offering
·
Mortality-death rate t Open population!
·
-
Immigration Individuals into area
·
-
move
Emigration Individuals leave population ↓
·
-
Environmental-Resistance
Total number of factors that stop a population from
at it's rate
reproducing mascimum
·
Determined by limiting factors
-Density-Endependant Regardless of population size!
-
·
Limit due to natural factors
growth
·
Physical Factors : ·
Catastrophic Events
↳ rainfall ↳
Drought
↳
temperature ↳ Floods
↳
Acidity! ↳ Fire
↳
Humidity
