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WorksheetsEcological Disturbances
Total questions: 15
Worksheet time: 15mins
What is the Intermediate Disturbance Hypothesis?
Small disturbances have the greatest effect on ecosystems
Moderate disturbances are ideal for biodiversity
Large disturbances are best for ecosystems
No disturbances lead to high biodiversity
What happens to ecosystems after intermediate disturbances?
They become less biodiverse
They create new habitats with unique niches
They are completely destroyed
They return to their original state
What is primary succession?
When plants grow in a garden
When animals migrate to a new habitat
When a forest regrows after a fire
When organisms populate an area for the first time
What is the main idea of ecological succession?
Succession only happens after major disasters
Animals are the primary drivers of succession
Stability is the goal of all ecosystems
Destruction and disturbance lead to beauty and diversity
What is the role of plants in primary succession?
They are not involved in primary succession
They are the primary colonizers
They follow animals in colonizing new areas
They only grow after soil is formed
What is the significance of the Permian-Triassic Extinction Event in the context of ecological succession?
It is an example of a major disturbance leading to primary succession
It marked the end of ecological succession
It was caused by human activity
It had no impact on ecological communities
Which type of plants are often the first to colonize a lifeless area?
Prokaryotes or protists
Gymnosperms
Angiosperms
Ferns
What is the main advantage of desolate wastelands for pioneer species?
No competition
Abundant water
Rich soil
High biodiversity
What is secondary succession?
The final stage of ecological succession
The colonization of a new area by pioneer species
The process of soil formation
The first response after a smaller disturbance
The High Plains ecoregion contains large areas of prairie grass. When there is a drought it causes plants to become dry. Which catastrophic event can occur easily?
hurricane
volcanic eruption
floods
wildfires
Series of gradual changes that occur in a community following a disturbance until reaching a stable ecosystem
Primary Succession
Secondary Succession
Climax community
Ecological Succession
What is the role of fire in maintaining certain ecosystems?
A) It destroys all plant life permanently
B) It helps in nutrient cycling and seed germination
C) It prevents any form of plant growth
D) It causes irreversible damage to the ecosystem
Which of the following is an example of a natural ecological disturbance?
A) Deforestation
B) Urban development
C) Volcanic eruption
D) Agriculture
How do invasive species affect ecological disturbances?
A) They stabilize the ecosystem
B) They have no impact
C) They can increase the frequency and intensity of disturbances
D) They always lead to positive outcomes
What is the primary effect of a keystone species being removed from an ecosystem?
A) No noticeable change
B) Increased biodiversity
C) Collapse of the ecosystem structure
D) Immediate recovery of the ecosystem
