English Dictionary

oxygen catastrophe

名詞

An event during the oxygenation event of Earth's past, where the level of free oxygen in the environment exceeds the toleration levels of most extant anerobic life, becoming toxic to existing life, which prior to the mass production of oxygen, was an anerobic reducing environment. This is sometimes considered a mass extinction event, or the first mass extinction event, but as all life was unicellular, there is no fossil boundary to mark the event for conventional paleontology to recognize it.

日本語の意味

地球の酸素化の過程において、環境中の自由酸素濃度が上昇し、従来の嫌気性生物が耐えられないほどの毒性を持つ酸素が存在するようになり、その結果、多くの嫌気性生物が大量絶滅した現象。これは初期の大量絶滅事象として扱われることがあり、かつての還元的で酸素不足の環境からの急激な変化を示す。

Scientists debate whether microbial diversity plunged during the oxygen catastrophe that accompanied Earth's first widespread oxygenation.

科学者たちは、地球で初めて大規模に遊離酸素が増加した際に起きた酸素化による壊滅で微生物の多様性が急激に減少したかどうかを議論している。

意味（1）

An event during the oxygenation event of Earth's past, where the level of free oxygen in the environment exceeds the toleration levels of most extant anerobic life, becoming toxic to existing life, which prior to the mass production of oxygen, was an anerobic reducing environment. This is sometimes considered a mass extinction event, or the first mass extinction event, but as all life was unicellular, there is no fossil boundary to mark the event for conventional paleontology to recognize it.

意味（2）

Such an event that theoretically occurs elsewhere, away from Earth.

oxygen catastrophes （ plural ）