Ecological Succession- primary and secondary 3-18 and 3-19

What triggers the process of ecological succession?

• Pollution

• Seasonal changes

• A disturbance or the creation of a new habitat

• Introduction of invasive species

Which type of succession begins in areas without any soil?

• Tertiary succession

• Secondary succession

• Quaternary succession

• Primary succession

What are pioneer species?

• Species that are introduced by humans

• The first species to colonize newly formed or disturbed lands

• The first plants to grow back after a fire

• The first animals to inhabit an area

Which species are often pioneer species in primary succession?

• Grasses

• Lichen and moss

• Evergreen trees

• Deciduous trees

How do pioneer species contribute to primary succession?

• By creating soil from rock

• By introducing diseases

• By preying on other species

• By shading out other species

How does secondary succession differ from primary succession?

• It occurs faster because soil is already present

• It leads to less biodiversity

• It does not involve pioneer species

• It only happens after a volcanic eruption

What happens first in secondary succession?

• Animals return to the area

• Grasses and other small plants grow back

• The soil is removed and replaced

• Large trees grow back immediately

What is the outcome of secondary succession?

• The ecosystem returns to its original state

• A completely different ecosystem is formed

• The ecosystem is similar but not identical to its original state

• The area remains barren and devoid of life

What role do fires play in an ecosystem according to the video?

• They can increase biodiversity through controlled burns

• They have no significant impact

• They are unnatural and should be prevented

• They only cause destruction

Why are controlled burns beneficial to ecosystems?

• They increase the risk of wildfires

• They help manage undergrowth and promote healthy forests

• They prevent the growth of plants

• They destroy all the nutrients in the soil