The phrase "extinction threat" refers to a situation where a particular species or group of organisms is at risk of disappearing completely from the world. Full definition
But extinction threats in the two - degree world are not limited to the oceans. (owlcation.com)
However, population viability models in African wild dogs suggest that diseases causing high adult mortality can pose a significant extinction threat [19]. (journals.plos.org)
The acidification has already been measured, and if the increasing CO2 trend continues it would come to pose a serious extinction threat to major classes of marine organisms, including corals. (esrl.noaa.gov)