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FOODWEB
ANALYSIS ACTIVITY
In this activity, you will need the following:
1) The Food Web Analysis Worksheet.2) Pencil.3) Pencil crayons or colored pencils.4) Eraser.
ACTIVITY INSTRUCTIONS
In this activity, you will learn the following:1) How to count the number of food chains in a food web.
2) How to determine how many food chains an organism belongs to in a food web.
3) How to identify and count the following organisms in the food web: herbivores, omnivores, carnivores, top carnivores, primary consumers, secondary consumers, tertiary consumers and quaternary consumers.
5) How to determine the effect an organism would have on other members of the food web if it were to go extinct.
ACTIVITY OBJECTIVES
4) How to identify and count organisms that have more than one role in the food web. E.g. organisms that are both primary and secondary consumers.
FOOD WEBS A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
How many food chains are in this simple food web?
Food Web #1
grasses
mouse
hawk
snake
hawkhawkhawkhawkhawkcoyote
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawkhawkhawk
A food web is made up of a group of _______________________. Food Web:
coyotehawkhawk
interconnectedfood chains
1
Food Web #1
How many food chains are in this simple food web?
A food web is made up of a group of _______________________.
FOOD WEBSFood Web:
grasses
mouse
coyotehawk
snake
hawk
interconnectedfood chains
1
Food Web #1
How many food chains are in this simple food web?
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
2
Food Web #1
How many food chains are in this simple food web?
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
2
Food Web #1
How many food chains are in this simple food web?
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
3
Food Web #1
Try the next one on your own.
How many food chains are in this simple food web?
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog Count how many food chains there are in total in this food web.
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #2
Difficulty: Easy
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #2
1 Difficulty: Easy
Count how many food chains there are in total in this food web.
FOOD WEBS A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #2
1 Difficulty: Easy
Count how many food chains there are in total in this food web.
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #2
2 Difficulty: Easy
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #2
2 Difficulty: Easy
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #2
3 Difficulty: Easy
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #2
3 Difficulty: Easy
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #2
4 Difficulty: Easy
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #2
4 Difficulty: Easy
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #2
5
Try the next one on your own.
Difficulty: Easy
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly
Count how many food chains there are in total in this food web.
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly1
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly1
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly2
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly2
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly3
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly3
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly4
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly4
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly5
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly5
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly6
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly6
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly7
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly7
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Difficulty: Medium
Count how many food chains there are in total in this food web.
grasshopper
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
aquaticplants
frog
butterfly
dragonfly8
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #3
Try the next one on your own.
Difficulty: Medium
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
Count how many food chains there are in total in this food web.
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
1
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
1
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
2
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
2
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
3
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
3
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
4
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
4
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
5
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
5
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
6
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
6
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
7
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
7
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
8
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
8
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
9
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
9
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
10
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
10
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
11
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
11
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
12
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
12
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
13
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
13
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
14
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
14
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
15
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
15
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
16
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
16
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
17
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
17
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
FOOD WEBS
grasses
mouse
coyotehawk
snake
hawk
grasshopper
aquaticplants
frog
butterfly
dragonfly
butterfly
housefly
terrestrialplants
bird
18
A food web is made up of a group of _______________________. Food Web: interconnectedfood chains
Food Web #4
Difficulty: Hard
Count how many food chains there are in total in this food web.
EXAMPLES OF FOOD WEBS
EXAMPLES OF FOOD WEBS
EXAMPLES OF FOOD WEBS
ANALYZING A FOOD WEBa) How many herbivores are there?
b) How many omnivores are there?
5
0
ANALYZING A FOOD WEBa) How many herbivores are there?
b) How many omnivores are there?
c) How many carnivores are there?
5
0
7
ANALYZING A FOOD WEBa) How many herbivores are there?
d) How many top carnivores are there?
b) How many omnivores are there?
c) How many carnivores are there?
5
0
7
3
ANALYZING A FOOD WEBa) How many herbivores are there?
d) How many top carnivores are there?
b) How many omnivores are there?
c) How many carnivores are there?
e) How many food chains are the toads connected to?
5
0
7
3
1
ANALYZING A FOOD WEBa) How many herbivores are there?
d) How many top carnivores are there?
b) How many omnivores are there?
c) How many carnivores are there?
e) How many food chains are the toads connected to? f) How many food chains are the mice connected to?
5
0
7
3
13
ANALYZING A FOOD WEBa) How many herbivores are there?
d) How many top carnivores are there?
b) How many omnivores are there?
c) How many carnivores are there?
e) How many food chains are the toads connected to? f) How many food chains are the mice connected to?
g) How many food chains are the spiders connected to?
5
0
7
3
13
6
ANALYZING A FOOD WEBa) How many herbivores are there?
d) How many top carnivores are there?
b) How many omnivores are there?
c) How many carnivores are there?
e) How many food chains are the toads connected to? f) How many food chains are the mice connected to?
g) How many food chains are the spiders connected to?
h) How many food chains are the foxes connected to?
5
0
7
3
13
68
i) How many primary consumers are there?
5ANALYZING A FOOD WEB
i) How many primary consumers are there?
j) How many secondary consumers are there?
5
6
ANALYZING A FOOD WEB
i) How many primary consumers are there?
j) How many secondary consumers are there?
5
6
ANALYZING A FOOD WEB
k) How many tertiary consumers are there?
6
i) How many primary consumers are there?
j) How many secondary consumers are there?
k) How many tertiary consumers are there?
l) How many quaternary consumers are there?
6
4
ANALYZING A FOOD WEB5
6
Organisms in a food web can be one level of consumer in one food chain, but another level of consumer in
another food chain in the same food web.
i) How many primary consumers are there?
j) How many secondary consumers are there?
5
k) How many tertiary consumers are there?
l) How many quaternary consumers are there?
6
6
4
m) Which organisms are both primary and secondary consumers? none
ANALYZING A FOOD WEB
i) How many primary consumers are there?
j) How many secondary consumers are there?
5
k) How many tertiary consumers are there?
l) How many quaternary consumers are there?
6
6
4
m) Which organisms are both primary and secondary consumers? nonen) Which organisms are both secondary and tertiary consumers?
spiders, insectivorous birds, snakes, foxes, hawks & owls
ANALYZING A FOOD WEB
ANALYZING A FOOD WEBo) Which organisms are both secondary and quaternary consumers?
foxes, hawks & owls, snakes, insectivorous
birds
ANALYZING A FOOD WEBo) Which organisms are both secondary and quaternary consumers?
foxes, hawks & owls, snakes, insectivorous
birds
p) Which organisms are both tertiary and quaternary consumers?
snakes, insectivorous
birds
ANALYZING A FOOD WEB
Since organisms are interconnected in an ecosystem, if one type of organism goes extinct, then this has effects
on the other organisms in the food web.
ANALYZING A FOOD WEBq) If the plants were to go extinct, explain the effect this would have on the primary consumers and the consumers above them.
If the plants go extinct, this would deprive the primary consumers of
food and they will decrease in numbers.
This causes the secondary consumers to
also decline because their food source is
decreasing. This pattern moves up the
entire food chain.
ANALYZING A FOOD WEBr) If the rabbits were to go extinct, explain the effect this would have on the foxes and squirrels.
If the rabbits go extinct, the foxes lose a food source, and they will
consume more of their other food sources.
Since the squirrels are one of the foxes’ other
food sources, the squirrels will get eaten
more and their numbers will decrease.
s) If the hawks and owls were to go extinct, explain the effect this would have on the foxes, squirrels and plants.
ANALYZING A FOOD WEB
If the hawks and owls go extinct, the foxes will have less competition for prey
and their numbers will increase. The consumers no longer preyed upon by the hawks and owls, like the squirrels,
will increase in numbers and overpopulate. This will cause the
primary consumers among them to eat too many of the plants which will cause
them to decline. The loss of the producers signal trouble for the entire
food web.
t) If the insectivorous birds were to go extinct, explain the effect this would have on the spiders and the toads.
ANALYZING A FOOD WEB
If the insectivorous birds go extinct, this causes the spiders to
overpopulate because these birds are the
spiders’ only predators. More spiders will then prey on the
predaceous insects which will decrease
their numbers. Since the toads’ only food
source are the predaceous insects, the
toads’ numbers will also decline.
The End!
Created by Anh-Thi Tang – Tangstar Science
Copyright © January 2013 Anh-Thi Tang (a.k.a. Tangstar Science)
All rights reserved by author.
This document is for personal classroom use only.
This entire document, or any parts within, may not be electronically distributed or posted to any website including teacher or classroom blogs or websites.
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