Extinction Events: Causes, Consequences, and Patterns

Disease outbreaks are not considered to be a major cause of mass extinction events, as they typically affect only a small number of species.

The Chicxulub impact occurred approximately 65 million years ago, at the end of the Cretaceous period.

Mass extinction events can lead to evolutionary opportunities for surviving species, as they may be able to fill the ecological niches left vacant by extinct species.

The Permian-Triassic extinction event is estimated to have killed approximately 95% of all marine species.

Mass extinction events are not more common during periods of high atmospheric oxygen levels.

The background extinction rate is the average rate of extinction over long periods of time, typically measured in species per million years.

A high reproductive rate can actually help a species to recover from population declines, making it less vulnerable to extinction.

Ecological release refers to the process by which species expand their ranges and occupy new ecological niches after a mass extinction event.

Habitat destruction is not a type of mass extinction event, as it is caused by human activities rather than natural processes.

A Lazarus taxon is a species that goes extinct and then reappears in the fossil record, sometimes millions of years later.

The current biodiversity crisis is not expected to lead to improved human health.

The term "sixth extinction" refers to the current biodiversity crisis, which is considered to be the sixth mass extinction event in Earth's history.

Introducing new species to ecosystems is not a strategy that can be used to mitigate the current biodiversity crisis, as it can lead to the extinction of native species.

A keystone species is a species that has a disproportionately large impact on its ecosystem relative to its abundance.

The extinction of keystone species can lead to cascading extinctions, ecosystem collapse, and loss of biodiversity, but it is not expected to lead to increased ecosystem resilience.