9/15/2015
Ecosystem Structure
What is an ecosystem?
Do you remember?
Biotic or Abiotic?
a. Abiotic
Ecosystem
A. unit that
includes all the
interacting parts
of an environment
in an area
(Nonliving)
Bacteria
b. Biotic
(Living)
Biotic
Bacteria
Biotic or Abiotic?
The Sun
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Abiotic
The Sun
Biotic or Abiotic?
Leather
Seats
Biotic
Leather
Seats
Biotic or Abiotic?
Dead Dog
Biotic or Abiotic?
Biotic
Dead Dog
Temperature
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Abiotic
Biotic or Abiotic?
Tire
Temperature
A. Energy
flows when
organisms
eat
Biotic
B.
Autotroph =
make their
own food
from
chemicals
and light
Tire
Sun’s energy>photosynthesis>glucose
C.
Heterotroph
= must
obtain food;
can’t make
it
Ecosystem
Structure
Who’s Niche is this
Mini - Structure
D. Niche= way
of life; physical
space and role;
“profession”
E. Habitat =
place where
organisms live;
“address”
Gathering acorns?
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Who’s habitat is this?
a. Herbivore =
eat plants
b. Omnivore =
eat flesh and
plants
Consumers
Trophic
Levels
(feeding
levels)
A. Producers =
autotrophs that make
their own food
c. Carnivore =
eat flesh
B. Consumers =
heterotrophs that eat
other plants and
animals
d. Scavenger
= feed on
organisms that
recently died
C. Decomposers =
break down dead
tissue and waste
Which of these are producers?
First level consumers feed on producers (Herbivores)
The zebra eats the grass
Second level consumers eat the first level consumers (Carnivores)
The lion eats the zebra
*Omnivores can be first level or second level consumers
Tertiary consumers eat the second level consumers
The vulture eats the lion
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Which of these are first level
consumers?
Herbivore
What is another name for a
second level consumer?
What is another name for first
level consumers?
Which of these are second level
consumers?
Carnivore
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Food Chain =
specific order in
which organisms
obtain energy in
an ecosystem
Food Web = complex
interconnected food
chains
Food Web
Food chain
Make a food chain
Answer:
Eagle
Daisy
Grasshopper
Coyote
Frog
--->
Pg. 30
--->
---->
---->
Notice the direction of the arrows.
This shows the flow of energy
Food Web
Make a food web
Mountain
Goat
Fungi
Pg. 30
Ladybug
Deer
Bear
Sparrow
Oak Tree
Barn owl
Grass
Spider
Fox
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Use the description below to answer the following question.
Use the description below to answer the following question.
In a marine ecosystem, disease
killed most of the sea otters. This
allowed the sea urchins and
clams to increase in number. As
a result, the sea gull population
increased and the seaweed
population decreased.
Identify a secondary consumer in
this marine ecosystem.
A. Seaweed
B. Clam
C. Sea urchin
D. Sea gull
In a marine ecosystem, disease
killed most of the sea otters. This
allowed the sea urchins and
clams to increase in number. As
a result, the sea gull population
increased and the seaweed
population decreased.
Identify a secondary consumer in
this marine ecosystem.
A. Seaweed
B. Clam
C. Sea urchin
D. Sea gull
Sea Gulls
Sea Otters
Sea Urchins
Clams
Seaweed
What abiotic factor is the initial energy source in
most food webs?
A. Producers
B. Rain
C. Bacteria
D. Sun
Sea Gulls
Sea Otters
Sea Urchins
Clams
Seaweed
What abiotic factor is the initial energy source in
most food webs?
A. Producers
B. Rain
C. Bacteria
D. Sun
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