The Living World: Biodiversity
What is a potential unintended consequence at the local level when policies favor rapid industrial re-development in an area undergoing secondary ecological succession after abandonment?
Attraction of migratory wildlife adapting to urban environments which aids dispersal of seeds across wider geographic locations aiding in succession.
Accelerated biotic growth due to increased nutrient availability from industrial runoff enhancing secondary succession speed uncharacteristically.
Disruption of successional pathways leading to loss of biodiversity and long-term sustainability issues within ecosystems regenerating from previous disturbances.
Increased carbon sequestration due to rapid industrial afforestation efforts outpacing emissions from redevelopment activities.
What role does secondary succession play in an ecosystem following a natural flood that severely alters the landscape?
Restoring the disturbed area through predictable stages leading back to its original climax community condition if undisturbed further.
Secondary succession has negligible effects since floods tend to return ecosystems quickly back to their pre-disturbance state without successional stages needed.
Permanently changing the regional climate patterns governing vegetation growth due to alterations in surface albedo effects post-floods.
Initiating new cycles of primary succession due to drastic changes in topography and soil composition caused by flooding.
Which of the following best exemplifies a challenge in managing resources during secondary succession in a forest ecosystem after a wildfire?
Assessing the impact of increased nutrient runoff due to heavy rains.
Determining the albedo effect on snow cover from the regrowth of plants.
Balancing timber harvest with habitat restoration for native species.
Calculating the carbon footprint of planting non-native tree species.
After a forest fire, what type of succession takes place as the previous community is replaced with new growth?
Primary succession
Annual succession
Tertiary succession
Secondary succession
Which type of species is typically the first to colonize a disturbed area in primary succession?
Scavengers
Keystone species
Pioneer species
Indicator species
How would an increase in global temperatures most likely affect the pattern of ecological succession in boreal forests?
Slowed succession because of enhanced permafrost stability
No change in succession patterns as boreal species are highly temperature tolerant
Accelerated succession due to increased growth rates and invasion by temperate species
Reverse succession leading to dominance by pioneer species due to constant wildfires
Which outcome from ecological restoration projects could be used as evidence that these efforts are impacting the natural pace of ecological succession within an affected area?
The return of keystone species leading to increased biodiversity.
Rapid reestablishment of climax community species typical for the biome.
Increased genetic variability among population members due to gene flow.
The unexpected dominance of invasive species altering trophic interactions.

How are we doing?
Give us your feedback and let us know how we can improve
Considering ecological succession, why might introducing nonnative plant species be problematic when rehabilitating degraded landscapes?
Non-native plants may outcompete native species, disrupting successional pathways.
Native plants typically have higher water requirements than non-natives, leading to resource competition.
The introduction of non-natives fosters greater biodiversity by adding novel organisms.
Non-native plants often fail to thrive, making them poor choices for habitat restoration.
In the context of reclamation ecology, which action specifically aims at accelerating primary succession on bare rock after mining operations cease?
Monitoring air quality for particulate matter reduction around the site
Implementing laws to restrict future mining activities in the region
Adding topsoil and pioneer species such as lichens and mosses
Introducing keystone predator species into the area
What is a keystone species in an ecosystem?
A species that reflects the health of its ecosystem
A species that serves as a pioneer species in primary succession
A species whose removal would cause dramatic changes in the ecosystem
A species that dominates the climax community