Chapter 5 Pearson Environmental Science

Front

What is the predictable series of changes over time called?

Back

Succession

Front

What happens to the prey population when the predator population rises?

Back

The prey population goes down.

Front

What is the process by which new species are generated called?

Back

Speciation

Front

What is the estimated range of the total number of species in the world?

Back

13-20 million

Front

What do we call species that colonize new land during primary succession?

Back

Pioneer species.

Front

Define 'succession' in ecological terms.

Back

A predictable series of changes in the composition of an ecosystem over time.

Front

What is 'speciation'?

Back

The formation of new and distinct species in the course of evolution.

Front

What role do pioneer species play in an ecosystem?

Back

They are the first species to colonize previously uninhabited land, initiating the process of succession.

Front

How does the predator-prey relationship affect population dynamics?

Back

An increase in predator population typically leads to a decrease in prey population.

Front

What is the difference between primary and secondary succession?

Back

Primary succession occurs on previously uninhabited land, while secondary succession occurs in areas where an ecosystem has been disturbed.