Climate change poses a severe threat to sloths, especially those in high altitudes, as rising temperatures could outpace their ability to adapt metabolically and geographically. Research reveals a bleak future for Central and South American sloths under climate change scenarios, with high-altitude populations most at risk. The study shows that sloths’ low metabolic rates and inability to cope with rising temperatures could lead to their extinction by 2100. This is especially true for sloths in higher elevations, who cannot easily migrate to cooler areas or increase their slow food intake to meet higher energy demands. The study calls for urgent conservation measures to protect these vulnerable populations. A new study, published today (September 27) in the journal PeerJ Life & Environment, has revealed that sloths, the famously slow-moving creatures of Central and South America, may face existential threats due to climate change. The research, conducted by scientists studying the metabolic response of sloths to rising temperatures, indicates that the energy limitations of these animals could make survival untenable by the end of the century, particularly for high-altitude populations. Rising temperatures could make survival untenable for high-altitude sloth populations by 2100, necessitating urgent conservation efforts. Credit: Dr. Rebecca Cliffe The study, titled “Sloth Metabolism May Make Survival Untenable Under Climate Change Scenarios ,” investigates how two-fingered sloths ( Choloepus hoffmanni ), living in both highland and lowland regions, respond to varying ambient temperatures. Using indirect calorimetry, researchers measured oxygen consumption and core body temperature of sloths under conditions mimicking projected climate changes. Their findings indicate a troubling future for sloths, especially those residing in high-altitude areas. Lead researcher Dr. Rebecca Cliffe explained, “Sloths are inherently limited by their slow metabolism and unique inability to regulate body temperature effectively, unlike most mammals. Our research shows that sloths, particularly in high-altitude regions, […]