Scientists from the Senckenberg Center for Human Evolution and Palaeoenvironment in Tübingen and from the Senckenberg Research Institute in Frankfurt examined the demise of the giant ape Gigantopithecus. In their study, published recently in the scientific journal “Quaternary International,” they reach the conclusion that the presumably largest apes in geological history died due to their insufficient adaptability. Analyses of fossil tooth enamel show that the primates were restricted to forested habitats.
It is well documented that the giant ape Gigantopithecus was huge – but beyond this fact, there are many uncertainties regarding the extinct ancestor of the orangutan. Size indications vary from 1.8 to 3 meters, and weight estimates between 200 and 500 kilograms. And there are various theories regarding its diet as well: Some scientists assume a strictly vegetarian lifestyle, while others consider the ape a meat eater, and a few believe that its diet was exclusively limited to bamboo.
Credit: © Senckenberg
Together with his colleagues from the Senckenberg Research Institute, Prof. Dr. Friedmann Schrenk and PD Dr. Ottmar Kullmer, as well as other international scientists, the biogeologist from Tübingen examined the fossil giant ape’s tooth enamel in order to make inferences on its diet and to define potential factors for its extinction. “Our results indicate that the large primates only lived in the forest and obtained their food from this habitat,” explains Bocherens, and he adds, “Gigantopithecus was an exclusive vegetarian, but it did not specialize on bamboo.”
The team of researchers studied stable carbon isotopes in the tooth enamel of the large primates – which are able to reveal information about the animals’ dietary habits even after several million years. The examined teeth came from China and Thailand – among them the first record of Gigantopithecus, which was discovered by paleoanthropologist Gustav Heinrich Ralph von Koenigswald in 1935 among a collection of fossils from a Chinese pharmacy. The results show that the giant ape’s habitat was restricted to forested areas – even though the ape was presumably too heavy to climb trees. This was the case both in China and Thailand, where open savannas would have been available in addition to the wooded landscapes.
“In order to be able to comprehend the evolutionary history of primates, it is important to take a look at their diet,” explains Bocherens, and he adds, “Our results also contribute to a better understanding of the reasons that led to the giant ape’s extinction.”
Bocherens and his colleagues work on the assumption that Gigantopithecus’s size, in connection with its restriction to one habitat type, doomed the giant apes. “Relatives of the giant ape, such as the recent orangutan, have been able to survive despite their specialization on a certain habitat. However, orangutans have a slow metabolism and are able to survive on limited food.
Contacts and sources:
Citation: Bocherens, H., et al., Flexibility of diet and habitat in Pleistocene South Asian mammals: Implications for the fate of the giant fossil ape Gigantopithecus, Quaternary International (2015), http://dx.doi.org/10.1016/j.quaint.2015.11.059
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