体調を崩してしまって出だしでつまずきましたが...
どう読むかがテーマです。
The plight of wild gorillas has taken a turn for the worse, according to the latest edition of the World Conservation Union (IUCN) Red List of Threatened Species. Western gorillas, which live in the western Congo basin, have moved from 'endangered' to 'critically endangered' in the 2007 list. And conservationists anticipate that the mountain gorilla, which is now found only in Rwanda, Uganda and the eastern Democratic Republic of the Congo, will follow suit once its population survey is completed.( … )
The upgraded conservation status is mainly the result of the Ebola outbreak and a resurgent trade in bushmeat, says Russ Mittermeier, chair of the IUCN Primate Specialist Group in Arlington Virginia. "The decline has been really precipitous," he says. "Gorillas are still being sold as a luxury food item."
下線部The upgraded conservation statusとはどういうことですか、文章にそくして説明してください。
全文は有料記事です。http://www.nature.com/nature/journal/v449/n7159/full/449127a.html