연구자들은 또 무산소 해역이 방대했지만, 그곳엔 이미 많은 생물이 살던 곳이 아니어서 멸종사태에는 큰 영향을 끼치지 못했을 것으로 보았다.
The researchers also considered that, although oxygen-free waters were vast, they were already not the habitats of much of the creatures, and thus had little influence on the incident of extinction.