, Ecosystemer
Ecosystem : a
biological community of interacting organisms & their physical environments
Community : all
organisms of all species present in an
ecosystem
Population : the number of individuals of one species in an eco
System/area of study
Habitat Where :
an
organism is lives within an eco
system
Niche How with Interactions
an
organism fits its environment with biotic & abiotic factors
: . .
pl ,
salinity temperature
, , oxygen levels s ...
An equilibrium when
species can survive an
ecosystem
becomes unstable .
they use
competitive survival strategy
-
a
rather than dispersal
relying on reproduction or
transition For survival
Phase
Survive conditions
harsh when
food
-
resources
conditions less than ideal
are scarce and
living are
other not unfavourable
organisms may survive in
-
conditions, an
equilibrium Species will remain
until equilibrium is attained again
Photosynthesis is
quite inefficient :
energy is reflected ,
converted to heat ,
incorrect wavelengths
Producer= an autotroph :
an
organism that can produce molecules
from Simple inorganic ones with the aid of
organic
·
external source
an
energy
·
Consumer = a heterotroph :
an
organism which gains its nutrients from complex organic molecules
(from ground
-
Grazing food chain :
primary consumers are
grazing on
living plants
Browsing eating
: leaves
of trees
·
Of all
energy absorbed
by Chlorophyll only ,
about 2 % is converted to chemical
energy
in
photosynthesis
↳ the rest is lost as
year
, Gross Primary Production
·
The rate at which plants store chemical energy is the
gross primary productivity (GPP)
·
GPP is the chemical
energy stored in
plant biomass in .
Net primary product
: chemical
energy stored in
plant biomass after accounting for respiratory losses (R)
to the environment (eg . .
lost as ...
heat
NDP =
GPP-R(Net primary production /g m-2
year
-
1)
NPP can end up in plants' own growth & reproduction or it can be taken up by herbivores & decomposers
legumes
peas/beans
- root nodule
Crhizobium )
NEN
↳ NO -
Yazotobacker
Gause 1909- yeast experiment Ploughing turning : soil over
If two have Grazing eating
·
the same
organisms grass
:
A Brazing eating
food source one will outcompete : trees & leaves
,
the other
Hedgerow :
Niche exclusion principal
Competitive
, Zoe-notes on
energy flow through ecosystems
GROSS Primary Productivity : Rate at which plants convert light energy into chemical energy
k5/m2/year stored in biomass
-Photosynthesis rate
NET Productivity= GPP Respiration
If NET = 0
,
no
glucose as all of it used in respiration
Secondary Productivity Rate at which consumers convert chemical
energy
in
food into biomass
Succession Change :
in the structure & species composition of an
ecosystem over time
Climax community
:
The final stage of succession .
A stable equilibrium
e .
.
g there is a volcano . How does
biodiversity increase ?
Lichens adapted to with little concentration of minerals
are
very grow
-
-
When they die , they increase mineral content of environment so
other plants
eventually can
grow
Lichen
Ecosystem : a
biological community of interacting organisms & their physical environments
Community : all
organisms of all species present in an
ecosystem
Population : the number of individuals of one species in an eco
System/area of study
Habitat Where :
an
organism is lives within an eco
system
Niche How with Interactions
an
organism fits its environment with biotic & abiotic factors
: . .
pl ,
salinity temperature
, , oxygen levels s ...
An equilibrium when
species can survive an
ecosystem
becomes unstable .
they use
competitive survival strategy
-
a
rather than dispersal
relying on reproduction or
transition For survival
Phase
Survive conditions
harsh when
food
-
resources
conditions less than ideal
are scarce and
living are
other not unfavourable
organisms may survive in
-
conditions, an
equilibrium Species will remain
until equilibrium is attained again
Photosynthesis is
quite inefficient :
energy is reflected ,
converted to heat ,
incorrect wavelengths
Producer= an autotroph :
an
organism that can produce molecules
from Simple inorganic ones with the aid of
organic
·
external source
an
energy
·
Consumer = a heterotroph :
an
organism which gains its nutrients from complex organic molecules
(from ground
-
Grazing food chain :
primary consumers are
grazing on
living plants
Browsing eating
: leaves
of trees
·
Of all
energy absorbed
by Chlorophyll only ,
about 2 % is converted to chemical
energy
in
photosynthesis
↳ the rest is lost as
year
, Gross Primary Production
·
The rate at which plants store chemical energy is the
gross primary productivity (GPP)
·
GPP is the chemical
energy stored in
plant biomass in .
Net primary product
: chemical
energy stored in
plant biomass after accounting for respiratory losses (R)
to the environment (eg . .
lost as ...
heat
NDP =
GPP-R(Net primary production /g m-2
year
-
1)
NPP can end up in plants' own growth & reproduction or it can be taken up by herbivores & decomposers
legumes
peas/beans
- root nodule
Crhizobium )
NEN
↳ NO -
Yazotobacker
Gause 1909- yeast experiment Ploughing turning : soil over
If two have Grazing eating
·
the same
organisms grass
:
A Brazing eating
food source one will outcompete : trees & leaves
,
the other
Hedgerow :
Niche exclusion principal
Competitive
, Zoe-notes on
energy flow through ecosystems
GROSS Primary Productivity : Rate at which plants convert light energy into chemical energy
k5/m2/year stored in biomass
-Photosynthesis rate
NET Productivity= GPP Respiration
If NET = 0
,
no
glucose as all of it used in respiration
Secondary Productivity Rate at which consumers convert chemical
energy
in
food into biomass
Succession Change :
in the structure & species composition of an
ecosystem over time
Climax community
:
The final stage of succession .
A stable equilibrium
e .
.
g there is a volcano . How does
biodiversity increase ?
Lichens adapted to with little concentration of minerals
are
very grow
-
-
When they die , they increase mineral content of environment so
other plants
eventually can
grow
Lichen
