#1
Which of the following is a primary factor influencing ecological succession?
Human intervention
ExplanationHuman intervention disrupts natural succession patterns.
#2
Which organism is typically the first colonizer in primary succession?
Lichen
ExplanationLichen serves as the initial colonizer due to its ability to grow on bare rock surfaces.
#3
What is the term for the first species to colonize a barren area during primary succession?
Pioneer species
ExplanationPioneer species are the initial colonizers in barren environments during primary succession.
#4
Which of the following is an example of a pioneer species in aquatic ecosystems?
Algae
ExplanationAlgae often serve as pioneer species in aquatic ecosystems, initiating ecological succession.
#5
What is the term for the process by which one species gradually replaces another in an ecosystem?
Succession
ExplanationSuccession is the gradual replacement of species in an ecosystem over time.
#6
What is a characteristic of climax communities in ecological succession?
High species diversity
ExplanationClimax communities exhibit high biodiversity and ecological stability.
#7
Which of the following is an example of secondary succession?
Recovery of a forest after a wildfire
ExplanationSecondary succession occurs after a disturbance, such as a wildfire, in an area with pre-existing soil.
#8
What is the process of primary succession?
The gradual development of communities in an area previously devoid of life.
ExplanationPrimary succession involves the gradual establishment of life in a barren area.
#9
Which factor typically initiates primary succession?
Volcanic eruption
ExplanationPrimary succession often starts with a catastrophic event like a volcanic eruption that creates new land.
#10
Which type of succession occurs in an area where soil is already present?
Secondary succession
ExplanationSecondary succession happens in areas with pre-existing soil, following a disturbance like a fire or logging.
#11
Which type of succession occurs in an area where the soil has been disturbed but not completely removed?
Secondary succession
ExplanationSecondary succession takes place in areas with disturbed but not completely barren soil.
#12
What role do pioneer species play in ecological succession?
They stabilize the environment for later species.
ExplanationPioneer species establish and stabilize the environment, paving the way for subsequent species.
#13
What is a seral stage in ecological succession?
A stage of ecological development leading to climax community.
ExplanationSeral stages are intermediate phases in succession, progressing towards the establishment of a climax community.
#14
How does ecological succession contribute to ecosystem stability?
By promoting nutrient cycling
ExplanationSuccession enhances ecosystem stability by facilitating nutrient cycling and ecosystem services.
#15
What is the term for the stage in succession where there is a mix of species, but no one species dominates?
Intermediate community
ExplanationIntermediate communities feature a diverse mix of species without a dominant one.
#16
In what stage of ecological succession does biodiversity tend to peak?
Climax stage
ExplanationBiodiversity typically reaches its peak in the climax stage of ecological succession.
#17
What is the primary role of pioneer species in ecological succession?
To stabilize the environment for later species
ExplanationPioneer species play a crucial role in stabilizing the environment, creating conditions for the establishment of later species.