Changes to food webs

What do the ARROWS in a food web represent?

• eating

• energy transfer

• sunlight

• prey/predators

Herbivores, omnivores and carnivores are all considered-

• Autotrophs

• Producers

• Consumers

• Decomposers

Tags

NGSS.5-LS2-1

NGSS.5-PS3-1

Who is/are the producer(s) in this food web?

• Mussels

• Zooplankton

• Phytoplankton and Algae

• Limpets

How do changes in one population affect a food web?

• They have no effect on the food web.

• They can cause a chain reaction, impacting other populations connected in the web.

• They only affect the population that is changing.

• They lead to the extinction of all species in the food web.

Why are decomposers important to the health of the ecosystems the live in?

• They are not important, decomposers just make energy flow easier

• They break down dead organisms, which recycles nutrients back into the soil

• They get energy from small insects that are pests to the bigger animals in the ecosystem

• They clean the water sources in ecosystems making the water better for other organisms to drink

If the mouse population becomes sick and decreases, which statement about the food web will be true?

• The grass population will decrease.

• The hawk population will increase.

• The grass population will increase.

• The wildflower population will decrease.

If the Blue crab population decreased, what would be the impact or effect on the food web?

• The population of Herring gull and otter will increase.

• The population of Sheepshead minnow and periwinkle will increase.

• The population of Cord grass will increase.

• The population of the diamondback will increase.

The diagram illustrates a gulf food web. Which of the following would best describe what would happen if the Periwinkle population increased? Pick 2

• The otter population would decrease

• The herring gull population would stay the same

• The cord grass population would decrease.

• The Diamondback terrapin population would slightly increase

If a drought took out most of the producers in this ecosystem, how would the food web be affected?

• The populations of the apex predators would increase

• The deer and field mouse populations would increase while the robin and squirrel populations would decrease

• The populations of all of the organisms would decrease a little then bounce back to their normal numbers

• The populations of all of the organisms would decrease

If the population of striped skunks dramatically decreased then the populations of the ​ (a)   would dramatically increase.

The populations of the ​ (b)   and ​ (c)   would decrease as well.

• Water Oaks
• mice
• Eastern Gray squirrels
• ants
• great horned owls
• Red- tailed hawks