Date: May 1st, 2017
Aim # 71: How do organisms interact in an
ecosystem?
Do Now:
1) What do we call an organism’s role in its community?
2) What is the role of PRODUCERS?
3) What is the role of HERBIVORES?
4) What is the role of CARNIVORES?
5) What is the role of bacteria and fungi? Why are the
so important?
6) What is the role of scavengers?
HW:
1)Daily Review of class notes
2)RRB pages 1-4 due FRIDAY
3)Castle Learning (QUIZ) due MONDAY
Aim #71: How do organisms
interact in an ecosystem?
Types of Relationships:
Competitive
Cooperative
Predator-Prey Relationship:
1) Why do organisms need to
eat?
To get ENERGY!!
Cell Respiration:
C6H12O6 + O2
ATP + CO2 + H2O
2) Organism Categories:
Organisms
Producers
(Autotrophs)
Consumers
(Heterotrophs)
Decomposers
3) Organism Categories:
Consumers
1’
Consumers
2’
Consumers
3’
Consumers
Herbivore
Carnivore/
Omnivore
Carnivore/
Omnivore
Herbivores – eat only producers
Carnivores – eat only meat
Omnivores – eat both producers & meat
Ecosystem Relationships
a) Parasite & host – parasite benefits and host is affected ( + , - )
b) Mutualism (symbiosis) – both benefit ( +, + )
c) Commensalism – one benefits and other is unaffected ( + , 0)
d) Predator & prey – predator benefits and prey is affected ( + , -)
4a) Parasites
Fluke Worms
Tick
Parasites are organisms that attack other live
organisms called hosts.
Parasite benefits and host is affected ( + , - )
4b) Mutualism (symbiosis):
The Nile crocodile opening
its mouth to permit the
Egyptian plover to feed on
any leeches attached to its
gums.
both benefit ( +, + )
Bee eats nectar &
at the same time
picks up pollen to
be spread to other
flowers.
4c) Commensalism:
Adult barnacles are sessile and they benefit by
attaching to a whale’s flipper by being transported
to food sources. The whale is unharmed.
one benefits and other is unaffected ( + , 0)
Date: May 2nd, 2017
Aim # 71: How do organisms interact in an
ecosystem?
Do Now:
1) What are primary consumers?
2) What are secondary consumers?
3) What is parasitism? Give an example.
4) What is mutualism (symbiosis)? Give an example.
5) What is commensalism? Give an example.
6) What is a predator-prey relationship? Give an
example.
HW:
1)Daily Review of class notes
2)RRB pages 1-4 due FRIDAY
3)Castle Learning (QUIZ) due MONDAY
5) How do the cows we eat get their
energy?
Primary consumers get their energy from
the producers they eat
6) How do producers get their
energy?
The primary source of
energy for living things is
sun
the____.
Autotrophs
____________capture
this
energy through a process
photosynthesis
of _________________
7) How is energy transferred in a
community?
• Energy is transferred by
consuming other organisms
8) In which direction is the energy
moving? Why?
9) Food Chains
Scientists depict this transfer of energy as a
Food chain. They show the transfer of
energy from one organism to another in a
community
10) Food Webs
•Show many food chains
interconnected together
11) Energy Pyramid
2’ Consumers
1’ Consumers
Producers
Energy Flow
3’ Consumers
12) Sun’s Energy in an Ecosystem
• Some of the
energy is used
by each
organism and
some of it is
lost as heat
energy to the
environment
13) Why is there so little energy at the
top of the pyramid?
• Most of the energy from the sun has been used or lost
by organism in the lower levels
• Only about 10% of the energy available at each level is
transferred to the NEXT level.
1%
10%
100%
Which organism has the least amount of energy flow?
The most amount of stored energy?
Label the pyramid below:
carnivores (tertiary consumers)
carnivores (secondary consumers)
herbivores (primary consumers)
producers (autotrophs)
Date: May 3rd, 2017
Aim # 71: How do organisms interact in an
ecosystem?
Do Now:
1) Please take out your notes packets!
HW:
1)Daily Review of class notes
2)RRB pages 1-4 due FRIDAY
3)Castle Learning (QUIZ) due MONDAY
14) Ecological pyramids
Section 3-2
Energy Pyramid
Shows the relative amount of
energy available at each trophic
level. Organisms use about 10
percent of this
energy for
life processes.
The rest is lost
as heat.
Biomass Pyramid
Represents the amount of living
organic matter at each trophic
level. Typically, the greatest
biomass is at the base of the
pyramid.
Pyramid of Numbers
Shows the relative
number of individual
organisms at each
trophic level.
Go to
Section:
Energy Pyramid
• Shows the
amount of
energy available
in an ecosystem
at each feeding
(TROPHIC) level
0.1
1
10
3
2
1
producers
Biomass pyramid
• Shows the relative mass of organisms
(biomass) at each feeding level
Pyramid of Numbers
• Population size also
tends to generally
decrease as you move
up through the tropic
levels.
Questions:
a.
b.
c.
d.
e.
f.
g.
h.
What type of relationship is one organism harmed and
the other benefits?
What type of relationship do both organisms benefit?
What type of relationship is one benefited and the
other is neither harmed nor benefited?
What kinds of living things are producers? Why are
they called autotrophs?
What makes an animal a primary consumer?
How does the amount of food energy change as you
move up the pyramid?
Where do the producers get their food energy?
What would happen to the pyramid if green plants died
out?