Honors Chapter 6: Ecosystem Balance Review

Consumers that actively hunt other living organisms

are called_________.

predators

This is why new species are able to form on islands

Large niche diversity, no competition, no

predators

This might happen after a forest fire

Secondary succession

The organism that is being eaten

prey

Give an example of a mutualistic relationship

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What two organisms make up a lichen?

Fungi & Algae

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T/FPrey population follows predator

population in size

False

What two factors determine a terrestrial biome?

Temperature & Rainfall

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What is the most diverse terrestrial biome?

Tropical Rain Forest

A community that does not undergo further succession is

called

Climax Community

One organism benefits the other is harmed

Parasitism

Compare & contrast the desert & the tundra

Both receive little rainfall however desert is hot & the

tundra is cold

Bare Rock, Glaciers retreating

Primary succession

Describe the steps of primary succession

Bare rock, lichens, soil formation, grasses, shrubs,

seedlings, large mature trees.

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Give an example of commensalism

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Why are there so many birds in an island community

B/C they can get there easier than other animals b/c of flight

T/FIf an ecosystem goes out of balance, it cannot adjust to regain the balanced state.

False

Give an example of a parasitic relationship

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75% of Earth’s biomass is contained in

forests

An increase in a predator population will directly result in

A decrease in the prey population

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Describe the difference between predation & parasitism

When would you find populations of host organisms

parasitized?When they are overcrowded

Describe the Chaos theory

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An organism that feeds on the body fluids or tissues of

another organism but does not kill it is called a

_________________.

Parasite

Name the three different types of forests

Deciduous

Coniferous

Rain

Which biome do you live in?

Deciduous Forest

What are two theories that explain how the dinosaurs became extinct?

Large comet or asteroid & Changing climate

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Which stage of succession has a high evaporation rate?

Grass

Describe the process of aquatic succession

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Which stage of succession is more biodiverse?

Forests

T/F Most communities never reach

a climax stage

TRUE

Any relationship in which two species live closely together &

at least one species is benefitting.

Symbiosis