Ecology Test #2

Match the following

• Density-Dependent Limiting Factor

• The change in the amount of individuals of a species in an area over a period of time

• Population Density

• Affects the population size differently depending on how dense the population is

• Climax Community

• The average number of individuals in a population per unit area or volume

• Population Growth

• Affects the population size regardless of how dense the population is

• Density-Independent Limiting Factor

• A mature and stable community of plants and animals

The number of organisms that an environment can support

• Carrying Capacity

• Population Size

• Climax Community

• Population Growth

The number of individuals in a population

• Population Size

• Carrying Capacity

• Population Density

• Population Growth

What is one difference between primary and secondary succession?

• Primary succession starts with rock; secondary succession starts with soil

• Primary succession starts with soil; secondary succession starts with rock

• Primary succession takes place once; secondary succession takes place twice

• Primary succession takes 100 years; secondary succession takes 1,000 years

The first species to arrive in an area after a disturbance is a…

• Secondary succession

• Primary Succession

• Pioneer Species

• Climax Community

1. What is the pioneer species in secondary succession?

• Moss

• Grass

• Trees

• Bush

What is the final stage of ecological succession?

• Pioneer Species

• Secondary Succession

• Primary Succession

• Climax Community

1. After a volcanic eruption has covered an area with lava, which of the following is the most likely order of succession in the repopulation of the area?

• lichens → grasses → shrubs → trees

• mosses → grasses → lichens → trees

• grasses → trees → mosses → lichens

• shrubs → grasses → trees → lichens

 what sequence of the following pictures correctly illustrates the natural succession of an aquatic ecosystem into a land ecosystem?

• 1,2,3,4

• 2,4,3,1

• 3,4,2,1

• 2,3,1,4

1. Which of the following is TRUE about primary succession?

• Soil is already present

• Grasses are the first plants to grow

• Reaches climax community in ~1,000 years

• Occurs where organisms lived previously