Food Webs and Trophic Cascades

An interconnected web that represents the flow of energy (and what eats what) through an ecosystem, is referred to as a?

• trophic level

• trophic cascade

• food web

• food chain

Tags

NGSS.MS-LS2-3

Which of the following describes the broader consequences or side-effects when a certain species that usually helps to keep the entire ecosystem balanced is reduced or removed.

• trophic level

• trophic cascade

• food web

• keystone species

Tags

NGSS.MS-LS2-4

A ​ (a)   is casused by an animal at the top of the food chain and it affects every other organism. When an ​ (b)   is removed from a food chain it upsets the ​ (c)   of the whole ecosystem.

• trophic cascade

• apex predator

• balance

Tags

NGSS.MS-LS2-4

What is a tropic cascade?

• an ecological process triggered by the removal or addition of a top predator that causes changes throughout the food chain.

• an ecological process triggered by the removal or addition of a top predator that causes no changes throughout the food chain.

• an ecological process triggered by the removal or addition of a vegetation that causes no changes throughout the food chain.

• an ecological process triggered by the removal or addition of a primary consumer that causes changes throughout the food chain.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Trophic cascades refer to...

• impacts that reach beyond adjacent trophic levels.

• impacts that reach the adjacent trophic level.

• impacts that reach only one trophic level.

• impacts that reach the top trophic level

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

How do the predators have a positive impact on the vegetation?

• Since the predators eat the herbivores they eat the producers

• Since the predators eat the herbivores and keep that population in check so they do not over eat the vegetation

• The predators do not eat the vegetation so it is a positive impact

• The predators eat the vegetation keeping it in control

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

A keystone species that is a critical food source for predator populations and increases the diversity of predators in an environment. For example, krill. This is referred to as a?

• keystone predator

• keystone prey

• keystone ecosystem engineer

• keystone plant

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

A keystone species that keeps populations under control by hunting consumers in the environment that may otherwise over populate and reduce diversity, is referred to as a?

• keystone predator

• keystone prey

• keystone ecosystem engineer

• keystone plant

Tags

NGSS.MS-LS2-4

African elephants eat A LOT of small trees and shrubs that would otherwise become forests. This allows open spaces that grow grassess for antelopes and zebras and provides warm soil for small rodents for burrowing. Elephants also spread seeds via their dung. They can therefore be described as?

• Keystone predator

• Keystone prey

• Keystone producers

• Keystone ecosystem engineer

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Match the following trophic levels:

• Plant

• Producer

• Herbivore

• Secondary consumer

• Fungi

• Decomposer

• Carnivore

• Primary consumer