An ecological crisis occurs when the environment of a species or a population changes in a way that destabilizes its continued survival. There are many possible causes of such crises:
- It may be that the environment quality degrades compared to the species' needs, after a change of abiotic ecological factor (for example, an increase of temperature, less significant rainfalls).
- It may be that the environment becomes unfavourable for the survival of a species (or a population) due to an increased pressure of predation.
- Lastly, it may be that the situation becomes unfavourable to the quality of life of the species (or the population) due to raise in the number of individuals (overpopulation).
The evolutionary theory of punctuated equilibrium sees infrequent ecological crises as a potential driver of rapid evolution.
Read more about Ecological Crisis: Abiotic Factors, Biodiversity Extinction, Overpopulation, Other Examples
Famous quotes containing the words ecological and/or crisis:
“The question that will decide our destiny is not whether we shall expand into space. It is: shall we be one species or a million? A million species will not exhaust the ecological niches that are awaiting the arrival of intelligence.”
—Freeman Dyson (b. 1923)
“Tennis is more than just a sport. It’s an art, like the ballet. Or like a performance in the theater. When I step on the court I feel like Anna Pavlova. Or like Adelina Patti. Or even like Sarah Bernhardt. I see the footlights in front of me. I hear the whisperings of the audience. I feel an icy shudder. Win or die! Now or never! It’s the crisis of my life.”
—Bill Tilden (1893–1953)