FOOD WEB ANALYSIS ACTIVITY ACTIVITY INSTRUCTIONS In this

FOOD WEB ANALYSIS ACTIVITY

ACTIVITY INSTRUCTIONS In this activity, you will need the following: 1) The Food Web Analysis Worksheet. 2) Pencil. 3) Colored pencils. 4) Eraser.

ACTIVITY OBJECTIVES 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. 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. 5) How to determine the effect an organism would have on other members of the food web if it were to go extinct.

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote snake mouse grasses Food Web #1 How many food chains are in this simple food web?

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote snake 1 mouse grasses Food Web #1 How many food chains are in this simple food web?

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote snake 2 mouse grasses Food Web #1 How many food chains are in this simple food web?

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote snake 3 mouse How many food chains are in this simple food web? Try the next one on your own. grasses Food Web #1

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote snake frog mouse grass hopper grasses aquatic plants Food Web #2 Difficulty: Easy Count how many food chains there are in total in this food web.

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote snake 1 frog mouse grass hopper grasses aquatic plants Food Web #2 Difficulty: Easy Count how many food chains there are in total in this food web.

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote snake 2 frog mouse grass hopper grasses aquatic plants Food Web #2 Difficulty: Easy Count how many food chains there are in total in this food web.

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote snake 3 frog mouse grass hopper grasses aquatic plants Food Web #2 Difficulty: Easy Count how many food chains there are in total in this food web.

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote snake 4 frog mouse grass hopper grasses aquatic plants Food Web #2 Difficulty: Easy Count how many food chains there are in total in this food web.

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote snake 5 frog mouse grass hopper grasses aquatic plants Food Web #2 Difficulty: Easy Count how many food chains there are in total in this food web. Try the next one on your own.

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote Count how many food chains there are snake in total in this food web. frog dragonfly mouse Difficulty: Medium butterfly grass hopper grasses aquatic plants Food Web #3

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote Count how many food chains there are snake in total in this food web. frog dragonfly mouse Difficulty: Medium 1 butterfly grass hopper grasses aquatic plants Food Web #3

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote Count how many food chains there are snake in total in this food web. frog dragonfly mouse Difficulty: Medium 2 butterfly grass hopper grasses aquatic plants Food Web #3

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote Count how many food chains there are snake in total in this food web. frog dragonfly mouse Difficulty: Medium 3 butterfly grass hopper grasses aquatic plants Food Web #3

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote Count how many food chains there are snake in total in this food web. frog dragonfly mouse Difficulty: Medium 4 butterfly grass hopper grasses aquatic plants Food Web #3

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote Count how many food chains there are snake in total in this food web. frog dragonfly mouse Difficulty: Medium 5 butterfly grass hopper grasses aquatic plants Food Web #3

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote Count how many food chains there are snake in total in this food web. frog dragonfly mouse Difficulty: Medium 6 butterfly grass hopper grasses aquatic plants Food Web #3

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote Count how many food chains there are snake in total in this food web. frog dragonfly mouse Difficulty: Medium 7 butterfly grass hopper grasses aquatic plants Food Web #3

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk coyote Count how many food chains there are snake in total in this food web. frog dragonfly mouse Difficulty: Medium 8 butterfly grass hopper grasses aquatic plants Food Web #3 Try the next one on your own.

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 1 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 2 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 3 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 4 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 5 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 6 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 7 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants plan Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 8 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 9 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 10 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 11 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 12 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 13 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 14 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 15 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 16 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 17 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

FOOD WEBS Food Web: A food web is made up of a group of interconnected _______ food chains _____. hawk Difficulty: Hard coyote snake 18 frog mouse dragonfly bird butterfly grass hopper housefly Count how many food chains there are in total in this food grasses aquatic terrestrial web. plants Food Web #4

EXAMPLES OF FOOD WEBS a) Is this an example of a terrestrial, marine, or freshwater food web? marine food web b) Identify a producer/consumer relationship in this food web. The phytoplankton is a producer. The krill and zooplankton are consumers.

EXAMPLES OF FOOD WEBS a) Is this an example of a terrestrial, marine, or freshwater food web? terrestrial food web b) Identify the parasite/host relationship in this food web. The deer tick is a parasite and the deer, squirrel, and mouse are hosts.

EXAMPLES OF FOOD WEBS a) Is this an example of a terrestrial, marine, or freshwater food web? freshwater food web b) Identify a decomposer in this food web. bacteria

EXAMPLES OF FOOD WEBS a) Is this an example of a terrestrial, marine, or freshwater food web? terrestrial food web b) Identify a predator/prey relationship in this food web. There are many examples in this food web. Ex. The raven is a predator and the squirrel is its prey.

EXAMPLES OF FOOD WEBS a) Is this an example of a terrestrial, marine, or freshwater food web? It is both a terrestrial and marine food web combined. b) Are there more individual producers or consumers in this food web? producers

ANALYZING A FOOD WEB a) How many herbivores are there? b) How many omnivores are there? 5 0

ANALYZING A FOOD WEB a) How many herbivores are there? b) How many omnivores are there? c) How many carnivores are there? 5 0 7

ANALYZING A FOOD WEB a) How many herbivores are there? b) How many omnivores are there? c) How many 5 0 carnivores are 7 d) How many top carnivores are there? 3 there?

ANALYZING A FOOD WEB a) How many herbivores are there? b) How many omnivores are there? c) How many 5 0 carnivores are 7 d) How many top carnivores are there? 3 there? e) How many food chains are the toads connected to? 1

ANALYZING A FOOD WEB a) How many herbivores are there? b) How many omnivores are there? c) How many 3 0 carnivores are 7 d) How many top carnivores are there? 3 there? f) How many food chains are the mice connected to? 5 e) How many food chains are the toads connected to? 1

ANALYZING A FOOD WEB a) How many herbivores are there? b) How many omnivores are there? c) How many 3 g) How many food chains are the spiders connected to? 0 carnivores are 7 d) How many top carnivores are there? 3 there? f) How many food chains are the mice connected to? 5 e) How many food chains are the toads connected to? 1 6

ANALYZING A FOOD WEB a) How many herbivores are there? b) How many omnivores are there? c) How many 3 g) How many food chains are the spiders connected to? h) How many food chains are the foxes connected to? 8 0 carnivores are 7 d) How many top carnivores are there? 3 there? f) How many food chains are the mice connected to? 5 e) How many food chains are the toads connected to? 1 6

ANALYZING A FOOD WEB i) How many organisms only eat producers? 5 We call these primary consumers.

ANALYZING A FOOD WEB i) How many 5 primary consumers are there? j) How many secondary consumers are there? 6

ANALYZING A FOOD WEB i) How many 5 primary consumers are there? j) How many secondary consumers are there? k) How many 6 6 tertiary consumers are there?

ANALYZING A FOOD WEB i) How many 5 primary consumers are there? j) How many secondary consumers are there? k) How many 6 6 tertiary consumers are there? l) How many quaternary consumers are there? 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. 4

ANALYZING A FOOD WEB i) How many 5 primary consumers are there? j) How many secondary consumers are there? k) How many 6 6 tertiary consumers are there? l) How many quaternary consumers are there? m) Which organisms are both primary and secondary consumers? none 4

ANALYZING A FOOD WEB i) How many 5 primary consumers are there? j) How many secondary consumers are there? k) How many 6 6 tertiary consumers are there? l) How many quaternary consumers are there? m) Which organisms are both primary and secondary consumers? n) Which organisms are both secondary and tertiary consumers? none spiders, insectivorous birds, snakes, foxes, hawks & owls 4

ANALYZING A FOOD WEB o) Which organisms are both secondary and quaternary consumers? foxes, hawks & owls, snakes, insectivorous birds

ANALYZING A FOOD WEB o) 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 WEB q) 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 WEB r) 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.

ANALYZING A FOOD WEB s) If the hawks and owls were to go extinct, explain the effect this would have on the foxes, squirrels and plants. 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.

ANALYZING A FOOD WEB t) If the insectivorous birds were to go extinct, explain the effect this would have on the spiders and the toads. 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.

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