Eastern Gorilla: Mountain subspecies recovers, Grauer's declines
IUCN's first "Green Status" assessment for the eastern gorilla reveals divergent fates for its subspecies. Mountain gorillas have seen population increases due to conservation, while Grauer's gorillas face significant declines.
The first comprehensive "Green Status" assessment for the eastern gorilla ( Gorilla beringei), led by Senckenberg researchers, indicates contrasting conservation outcomes for its two subspecies. While mountain gorilla ( Gorilla beringei beringei) populations have grown due to sustained protection efforts, Grauer's gorilla ( Gorilla beringei graueri) populations have declined significantly over the past two decades.
The eastern gorilla, the largest living ape, is found exclusively in the tropical forests of Central and East Africa. Both subspecies are critically endangered, facing threats from habitat loss, poaching, and armed conflicts. The IUCN assessment, involving over 60 experts, analyzed historical ranges, current populations, threats, and the impact of conservation measures.
Despite an estimated 60 percent reduction in Grauer's gorilla population over the last 20 years, leaving fewer than 7,000 individuals, the study highlights that conservation actions have prevented even greater losses. In certain areas of the Democratic Republic of Congo, such as the Oku Community Reserve and Nkuba Conservation Area, Grauer's gorilla populations have remained relatively stable amidst ongoing unrest.
The "Green Status" approach measures a species' progress towards full recovery within its natural habitat. While the eastern gorilla as a whole shows signs of recovery, the mountain gorilla's success demonstrates the effectiveness of intensive, long-term conservation, whereas Grauer's gorilla's situation underscores the critical need to maintain and expand these efforts.