How can a natural event such as a volcanic eruption affect biodiversity? Erupting volcanoes emit gases such as sulfur dioxide into the atmosphere. Sulfur dioxide can react with water and oxygen in the atmosphere to create
. This enters water systems and
most aquatic life.

The volcanic eruption liberates large amount of gases into the atmosphere. It releases water vapor, sulphur dioxide, carbon dioxide, carbon monoxide, hydrogen fluoride and hydrogen chloride into the atmosphere. ... It pollute the quality of water body hence results in mortality of aquatic animals.

Explanation:

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.