Half of Sumatran Elephant Population Lost in One Generation

6 hours ago 7

August 13, 2026 | 05:32 pm

An elephant named Indro died in Tesso Nilo National Park, Pelalawan, Riau, June 29, 2026. Doc. Tesso Nilo National Park Center

TEMPO.CO, Jakarta - The existential threat facing the Sumatran elephant (Elephas maximus sumatranus) is closely tied to the relentless shrinkage of its natural habitat. Data from the International Union for Conservation of Nature (IUCN) shows that more than 69 percent of the Sumatran elephant's potential habitat has been lost over the past two decades.

Currently, the wild elephant population in Sumatra is estimated at around 1,200 individuals. The large mammal is listed as Critically Endangered on the IUCN Red List after suffering a population decline of up to 50 percent within a single generation. These figures make Sumatra one of the regions with the fastest rates of elephant habitat loss in Asia.

Samedi, Director of the Tropical Forest Conservation Action Sumatra Program at the Kehati Foundation, said that habitat loss harms not only the animals but also the broader ecosystem. "When elephants lose their homes, we are actually losing one of the most important pillars for the sustainability of the Sumatran landscape," Samedi said in a written statement on Wednesday, August 12, 2026, marking World Elephant Day.

Samedi noted that the annual World Elephant Day serves as a moment to reflect on the dwindling survival of the Sumatran elephant. He emphasized the need to re-examine conservation issues from their root causes, which stem from human-elephant conflict, land conversion, forest fragmentation, and large-scale infrastructure development across their natural range.

"Elephants never choose to live alongside humans. They simply continue to follow the roaming paths they have used for hundreds, even thousands of years," Samedi said.

When those paths are transformed into plantations, roads, or residential areas, he added, "what is truly happening is that humans and development have entered the elephant's living space."

Elephants as an Umbrella Species

According to Samedi, the Sumatran elephant is an umbrella species whose condition reflects the overall health of a landscape. These animals require expansive, intact, and connected forest areas to search for food, water, and breeding partners.

"When elephant habitat is protected, thousands of other plant and animal species living within the same ecosystem are also protected," he said.

Furthermore, elephants act as ecosystem engineers. Through their movements, they help disperse seeds from various tree species, clear natural pathways in the forest, and support vegetation regeneration. According to Samedi, losing elephants means losing vital ecological functions that sustain the resilience of tropical forests.

He stressed that resolving human-elephant conflicts requires more than just patrols, animal herding, or barrier fences. While these measures are useful short-term responses, they do not address the root cause. "Namely, habitat loss and the disruption of ecological corridors have not been seriously addressed," Samedi said.

The Kehati Foundation recommends a technology-based approach to preserve wild populations. The measures include genetic mapping, early warning systems for human-wildlife conflict, electric power fencing, barrier ditches, and stronger support for law enforcement.

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