Tigers cling to survival in Sumatra’s increasingly fragmented forests

A research expedition tracked endangered tigers through the Sumatran jungles for a year and found tigers are clinging to survival in low density populations. Their findings have renewed fears about the possible extinction of the elusive predators. Tigers on the neighboring islands of Java, Bali, and Singapore went extinct in the 20th century, prompting new anti-poaching efforts to prevent the same fate for the subspecies on Sumatra. Those efforts have largely been successful. The density of tigers has increased over the last two decades and their numbers are twice as high in unlogged forests, the study found. But the study also found that well-protected forests are disappearing and are increasingly fragmented: Of the habitat tigers rely on in Sumatra, 17 percent was deforested between 2000 to 2012 alone, erasing any gains to the tigers' chance of survival, the study authors wrote. Habitat destruction for oil palm plantations was a leading culprit of deforestation.