Ecosystem Evolution: Succession, Biodiversity, and Biomass

What is primary succession?

• Changes in an ecosystem after a disturbance

• The initial establishment of an ecosystem

• The introduction of invasive species

• The recovery of an ecosystem after a fire

Which of the following is a pioneer species in a volcanic island?

• Large trees

• Mosses and lichens

• Invasive plants

• Large mammals

How does secondary succession differ from primary succession?

• It occurs faster because soil is already present

• It starts on bare rock

• It leads to a decrease in biodiversity

• It is initiated by volcanic activity

What role do pioneer species play in an ecosystem?

• They decrease biodiversity

• They prepare the soil for other species

• They are the final stage of succession

• They prevent other species from growing

Tags

NGSS.MS-LS2-2

How do human activities affect ecosystem complexity?

• By increasing biodiversity

• By accelerating primary succession

• By introducing invasive species

• By reducing habitat fragmentation

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

NGSS.MS-ESS3-4

What is the impact of invasive species on biodiversity?

• They increase genetic diversity

• They have no impact

• They decrease biodiversity

• They promote primary succession

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

NGSS.MS-LS2-2

Which of the following is a consequence of climate change on biomass?

• Decreased plant growth due to higher temperatures

• Increased biomass in all ecosystems

• No change in biomass

• Decreased biomass due to more frequent fires

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

What happens during the final stages of ecological succession?

• The ecosystem becomes less stable

• Pioneer species dominate

• Biodiversity decreases

• A stable climax community is formed

Tags

NGSS.MS-LS2-4

Why is soil important in secondary succession?

• It contains seeds of pioneer species

• It is necessary for volcanic activity

• It prevents invasive species

• It provides a habitat for large mammals

Tags

NGSS.MS-LS2-4

How does the introduction of an invasive species typically affect native species?

• It increases the population of native species

• It has no effect on native species

• It decreases the population of native species

• It promotes genetic diversity among native species

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-2