FREE Ecology Global Change Ecology Questions and Answers

Question 1

Which of the following phenomena is considered a direct consequence of ocean acidification, primarily driven by increased atmospheric CO2 absorption?

Accepted Answer

Reduced calcification rates in marine organisms with calcium carbonate shells or skeletons

Answer

Increased growth rates of coral reefs due to higher carbon availability

Answer

Expansion of oxygen minimum zones (OMZs) in the deep ocean

Answer

Enhanced nutrient upwelling in coastal regions

Question 2

A researcher observes a significant shift in the migratory patterns and breeding times of a bird species over the past few decades, correlating with regional temperature increases. This scenario is a prime example of which ecological response to global change?

Accepted Answer

Phenological mismatch

Answer

Habitat fragmentation

Answer

Eutrophication

Answer

Adaptive radiation

Question 3

The 'Anthropocene' is a proposed geological epoch characterized by significant human impact on Earth's geology and ecosystems. Which of the following provides the most compelling evidence for the start of the Anthropocene?

Accepted Answer

The 'Great Acceleration' of human activity and its environmental impacts post-1950

Answer

The widespread use of fire by early humans thousands of years ago

Answer

The agricultural revolution leading to large-scale land conversion

Answer

The industrial revolution and the invention of the steam engine

Question 4

Which of the following is a key predicted ecological consequence of increased frequency and intensity of extreme weather events (e.g., droughts, floods, heatwaves) due to climate change?

Accepted Answer

Accelerated rates of species extinctions, particularly for specialist species

Answer

Increased ecosystem stability and resilience due to natural selection pressure

Answer

Reduced disturbance regimes leading to climax community dominance

Answer

Homogenization of global biodiversity as generalist species thrive uniformly

Question 5

In the context of global change, what does the term 'tipping point' refer to?

Accepted Answer

A threshold beyond which a small perturbation can lead to large, irreversible changes in a system

Answer

The exact moment when a species becomes officially endangered

Answer

The maximum level of greenhouse gas emissions permissible before climate action is mandatory

Answer

The point at which all nations agree on a unified climate policy

Question 6

A conservation manager is observing a mountain-dwelling mammal species that is highly adapted to cold environments. As regional temperatures increase, the species' range is observed to be shifting upwards in elevation. This phenomenon is known as:

Accepted Answer

Altitudinal range shift

Answer

Latitudinal migration

Answer

Phenological advancement

Answer

Trophic cascade