Unit 9: Ecology

Front

What is primary succession?

Back

Primary succession is the process of ecological change that occurs in an area where no soil exists, such as after a volcanic eruption or on bare rock.

Front

Where does primary succession NOT occur?

Back

Primary succession does not occur in areas like a forest burned by fire, as soil is already present.

Front

What is a trophic level?

Back

A trophic level is a position in a food chain or food web, representing the flow of energy and nutrients from one organism to another.

Front

How does energy availability change in an energy pyramid?

Back

In an energy pyramid, available energy decreases as trophic levels increase.

Front

What are density independent limiting factors?

Back

Density independent limiting factors are environmental factors that affect populations regardless of their density, such as natural disasters and pollution.

Front

What is an example of a density dependent limiting factor?

Back

An example of a density dependent limiting factor is disease, which spreads more easily in crowded populations.

Front

What is ecological succession?

Back

Ecological succession is the process by which ecosystems change and develop over time, involving a series of stages.

Front

What is the role of pioneer species in primary succession?

Back

Pioneer species, like lichen and moss, are the first organisms to colonize barren environments, helping to create soil for other species.

Front

What is the correct order of species appearance in primary succession?

Back

The correct order is lichen, grasses, shrubs, and then trees.

Front

What is a food chain?

Back

A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.