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.

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