The Living World: Biodiversity
In an ecosystem with a narrow range of tolerance for temperature, how would an extended period of global warming most likely affect the native plant species?
The plants' geographic distribution might remain unchanged due to adaptation.
The plants may develop gradual resistance to higher temperatures.
The plants may increase their reproductive rates to maintain population size.
The plants may experience thermal stress leading to a decrease in biodiversity.
Which factor would most likely cause a tree species to exceed its ecological tolerance limit in a given area?
Seasonal variation in temperature within historical norms
A slight increase in the population of native herbivores
Extended drought reducing water availability
The introduction of another tree species with similar bark texture
Which factor would most likely increase a species' vulnerability to extinction due to a narrow range of ecological tolerance?
A diverse diet consisting of various food types.
Specialized feeding habits that rely on a single food source.
High reproductive rates with short gestation periods.
A large population size spread over a wide area.
In evaluating competing claims about forest conservation's impact on carbon sequestration services, which evidence would best support improved carbon storage through conservation practices?
Anecdotal reports from indigenous communities citing more abundant wildlife sightings after local forest preservation initiatives were implemented.
Long-term data showing increased biomass accumulation and soil organic carbon in undisturbed old-growth forests compared to managed forests.
Short-term observations indicating rapid tree growth rates but no significant change in total forest carbon pools within preserved areas.
Government statistics demonstrating higher employment rates within forestry management industries following conservation policy changes.
When examining two similar estuarine environments, what might explain differing levels of resilience following an extreme weather event?
Slight variations in salinity levels that do not significantly affect osmoregulation processes among resident organisms.
Variation in genetic diversity among foundational plant species contributing to differential adaptive capacities.
Temperature differences prior to the event causing negligible physiological stress on aquatic fauna populations.
Equal rates of sediment deposition which would typically have minimal impact on structural habitat features post-event.
What term describes the range of conditions, such as temperature or salinity, within which an organism can survive?
Range of Tolerance
Symbiosis
Niche Partitioning
Carrying Capacity
In which zone do organisms experience optimal conditions for growth, reproduction, and survival?
Optimal range
Zones of intolerance
Zone of physiological stress
Pioneer community stage

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How might acid rain alter the pH of a freshwater lake and subsequently impact species diversity?
INCORRECT 3. It has no significant effect on pH but can cause thermal stratification that impacts species distribution.
INCORRECT 1. It can increase the pH, leading to eutrophication and increased algal blooms.
INCORRECT 2. It can stabilize the pH, resulting in a more consistent environment that supports biodiversity.
CORRECT. It can lower the pH, making the water more acidic and harming acid-sensitive organisms.
What term describes the range of conditions, such as temperature and humidity, that an organism can endure before stress causes a decrease in reproduction?
Succession thresholds
Climax stages
Tolerance limits
Biotic potential
In what way can overfishing diminish fish population beyond their range of tolerance?
Via increased research efforts studying fish behavior and reproduction to improve conservation strategies.
By enhancing marine protected areas where fishing is limited or prohibited altogether.
Through implementation of fisheries management techniques like quotas and seasonal restrictions.
By removing too many adult fish resulting in insufficient breeding stock to maintain populations.