Hoffmann's two-toed sloth (Choloepus hoffmanni) become extinct before 2100 due to climate change

NEWS - Sloths may not survive the significant temperature increases predicted to occur by 2100. The notoriously slow-moving creatures native to Central and South America may face an existential threat from climate change, researchers say.

Research examining the metabolic response of sloths to rising temperatures suggests that the animals’ energy constraints could make survival untenable by the end of the century, particularly for high-altitude populations.

Rebecca Cliffe of the Sloth Conservation Foundation in Derbyshire, United Kingdom, and colleagues investigated how Hoffmann’s two-toed sloths (Choloepus hoffmanni), which live in highland and lowland areas, respond to varying ambient temperatures.

Using indirect calorimetry, the researchers measured the sloths’ oxygen consumption and core body temperature under conditions that mimic projected climate change. The findings suggest a troubling future for sloths, particularly those living in high-altitude areas.

"Sloths are limited by their slow metabolism and inability to regulate body temperature effectively, unlike most mammals. We show that sloths, especially in high-altitude areas, may not be able to survive the significant temperature increases predicted to occur by 2100," Cliffe said.

Original research

Cliffe RN, Ewart HE, Scantlebury DM, Kennedy S, Avey-Arroyo J, Mindich D, Wilson RP. (2024). Sloth metabolism may make survival untenable under climate change scenarios. PeerJ 12:e18168, DOI:10.7717/peerj.18168

Dlium theDlium

Kemadih (Fagraea ceilanica)

Kemadih ( Fagraea ceilanica ) is a species of plant in the Gentianaceae family. It grows as a climber and covers host trees. It is a perennial, multi-branched, hardwood plant with hard, brown bark and dark green young bark. F. ceilanica has thick leaves, 15 cm long and 8 cm wide. A central vein is linear, with a pointed tip and base. The upper surface is dark green and the lower surface is bright green. The petiole is 3 cm long. The flowers are fan-shaped with 5 inflorescences. The base is narrow, whitish-yellow or bright green, and 8 cm wide. Four inflorescences with brownish-white tips and one inflorescence with a green tip grow in the center. The fruit is green, 3.5 cm long, and the stalk is 2 cm long. TAXON Kingdom: Plantae Phylum: Tracheophyta Subphylum: Angiospermae Class: Magnoliopsida Order: Gentianales Family: Gentianaceae Tribe: Potalieae Subtribe: Potaliinae Genus: Fagraea Thunb. in Kongl. Vetensk. Acad. Nya Handl. 3: 125 (1782) Species: Fagraea ceilanica Thunb. in Kong...

Giant shield bug (Pycanum alternatum)

Giant shield bug or pycanum rubens ( Pycanum alternatum ) is a species of animal in Tessaratomidae, has a large shield covering the back, shiny green-blue-brown colored and appears to have a powder or wax layer, inhabiting the leaves of plants in open forests or bushes . P. alternatum is also called a stink bug because of its ability to release pungent aromas when disturbed. These insects live solitary with a partner and usually the mother gather in a family together in nymphs. White eggs are attached under the leaves of the plant. Nymphs can be found in the same host as their parent. The nymph has a flat rectangular shape with a large vein in the middle like a flat leaf. Nymphs having striking colors are light green, orange and red. Color may represent various stages of development or gender. The initial stage has a small size and red color. It grows in a bigger size and turns orange then ends in green. Kingdom: Animalia Phylum: Arthropoda Class: Insecta Order: Hemipter...

Plumeria rubra and Plumeria obtusa, the differences

SPECIES HEAD TO HEAD - The genus frangipani trees ( Plumeria Tourn. ex L.) has only 18 officially recorded species and two very similar species, frangipani ( Plumeria rubra L.) and white frangipani ( Plumeria obtusa L.). Both have the same habitus, flowers and fruits and are difficult to distinguish. The leaves of both species have slightly different shapes. Therefore, the leaves are very important to distinguish the two species, especially the shape of the tip. P. rubra has simple, lanceolate leaves with acute tips. P. obtusa has simple, elliptic leaves with rounded tips. By Aryo Bandoro Founder of Dlium.com . You can follow him on X: @Abandoro . Read more: Plumeria rubra Plumeria obtusa

Dlium