Show:
Keystone species
Energy
Autotroph vs. Heterotroph
Types of Consumers
Challenge
100

When a keystone species is removed (goes extinct) from an ecosystem this causes the ecosystem to _________. 

collapse, change, lose biodiversity 

100
A food web shows the transfer of ________ between organisms in an ecosystem
What is energy?
100

These organisms make their own energy

What is autotrophs / producer

100
These consumers eat only plants
What are herbivores
100
What is the difference between a food webs and a food chain?
What is a food web is one line of energy transfers. A food chain describes a complex interaction of many food webs in an ecosystem
200

What trophic level is always at the bottom of an energy pyramid?

What is producers

200
What option describes the flow of energy in an ecosystem? a. Producers-->Primary Consumers-->Secondary Consumers b. Secondary Consumers-->Primary Consumers-->Producers c. Primary Consumers-->Producers-->Secondary Consumers
What is A
200

These organisms do not make their own energy and rely on consuming other organisms to make energy

What is heterotrophs / consumer

200
These consumers only eat meat
What are carnivores
200
Draw a typical energy pyramid, include the relative amounts of energy in each trophic level
Many answers acceptable
300

Explain how a top predator like a wolf can impact plant populations?

by limiting populations of herbivores. 

300
How do most producers make/get their energy?
What is from the sun (through photosynthesis)
300

Algae, grass, and tress are examples of

What is autotrophs / producers

300
These consumers eat plants and animals
What are omnivores
300

A bird stalks, kills, and then eats and insect. Based on its behavior, which pair of ecological terms describe this bird A. herbivore, decomposer B. producer, heterotroph C. carnivore, consumer D. autotroph, herbivore

What is C

400

What trophic level are sea urchins?

primary consumer / herbivore

400
This percent of energy is transferred between trophic levels
What is 10%
400

Animals, Fungi, and most bacteria are examples of

What is heterotrophs / consumer

400
These consumers get energy by eating the carcasses of other animals that have been killed by predators or have died of natural causes classified as
What are scavengers
400
Identify the process that a producer can carry out that a consumer cannot
What is photosynthesis
500

what is biodiversity?

the variety of life in a place

500
90% of energy is lost to the environment as ______ between trophic levels
What is heat
500

in an ecosystem, what are there more of in terms of number and total weight (biomass) producers or consumers?

producers

500
These consumers feed on dead and decaying organisms
What are decomposers
500
Explain the 10% rule and how energy flows through an ecosystem
The 10% rule states that only 10% of energy is transferred between trophic levels. 90% of energy is lost as heat to the environment. Energy begins with the sun which is then absorbed and changed into sugars by producers. Primary consumers eat producers to gain energy. Secondary consumers eat primary consumes to gain energy. When living organisms die, decomposers break them down to gain energy and act as natural fertilizer for new producers