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26/06/2019 - At the Top of the Food Pyramid

Tübingen, 06/26/2019. Together with an international team, Senckenberg scientist Hervé Bocherens studied the fossilized teeth of the carnivorous dinosaur Tarbosaurus bataar. Based on stable isotopes, the researchers were able to draw inferences regarding the habitat and feeding habits of this relative of T. rex, who lived around 70 million years ago. According to the results, the carnivores were not very picky in their prey selection. The study is published recently in the scientific journal “Palaeogeography, Palaeoclimatology, Palaeoecology.”

The Gobi Desert in southern Mongolia is a well-known discovery site of fossil dinosaurs. “These fossils from the Cretaceous also include Tarbosaurus bataar, a representative of the Tyrannosaurids and relative of the famous Tyrannosaurus rex,” explains Prof. Dr. Hervé Bocherens of the Senckenberg Centre for Human Evolution and Palaeoenvironment at the University of Tübingen.

Bocherens and his team of scientists examined the fossilized teeth of this up to twelve-meter-long dinosaur, using oxygen and carbon isotopes in the tooth enamel to draw inferences regarding the dinosaurs’ feeding habits and the environmental conditions at the time.

“It is amazing how much information is revealed by this approximately 70-million-year-old tooth enamel,” explains a delighted Bocherens, and he continues, “Our analyses show that the environment of these carnivorous reptiles was about 10 degrees Centigrade warmer than today and the amount of precipitation was subject to strong seasonal fluctuations. We assume that the dinosaurs inhabited closed forests – in a climate characterized by monsoons with cold, dry winters and hot, rainy summers.”

In addition, the researchers were able to reconstruct the Tarbosaurs’ diet based on the teeth from five differently aged individuals. According to the results, the carnivores were not very picky in their prey selection: their menu included both the Hadrosauridae, commonly known as “duck-billed dinosaurs,” as well as different species of vegetarian sauropods. “Our isotope studies therefore confirm the fossil discoveries and show that Tarbosaurus took up a position at the top of the food pyramid,” adds Bocherens in summary.

Publication

Krzysztof Owocki, Barbara Kremer, Martin Cotte, Hervé Bocherens,

Diet preferences and climate inferred from oxygen and carbon isotopes of tooth enamel of Tarbosaurus bataar (Nemegt Formation, Upper Cretaceous, Mongolia), Palaeogeography, Palaeoclimatology, Palaeoecology,

2019, https://doi.org/10.1016/j.palaeo.2019.05.012.

Contact
Prof. Dr. Hervé Bocherens
Senckenberg Centre for Human Evolution and Palaeoenvironment (HEP)
Eberhard Karls Universität Tübingen
Tel. 07071- 29-76988
herve.bocherens@uni-tuebingen.de

Judith Jördens
Press Office
Senckenberg Gesellschaft für Naturforschung
Phone 069- 7542 1434
pressestelle@senckenberg.de



1
Fragment of Tarbosaurus lower jaw with teeth sampled   
(white stripes on tooth enamel). Photo: Senckenberg

2
Two specimens of Tarbosaurus bataar (one subadult and one full adult) with a human for Scale.
Picture: https://commons.wikimedia.org/wiki/File:Tarbosaurus_Steveoc86.jpg
Press images may be used at no cost for editorial reporting, provide


Press images may be used at no cost for editorial reporting, provided that the original author’s name is published, as well. The images may only be passed on to third parties in the context of current reporting.

To study and understand nature with its unlimited diversity of living creatures and to preserve and manage it in a sustainable fashion as the basis of life for future generations – that has been the goal of the Senckenberg Gesellschaft für Naturforschung (Senckenberg Nature Research Society) for the past 200 years. This integrative “geobiodiversity research” and the dissemination of research and science are among Senckenberg’s primary tasks. Three nature museums in Frankfurt, Görlitz and Dresden display the diversity of life and the earth’s development over millions of years. The Senckenberg Gesellschaft für Naturforschung is a member of the Leibniz Association. The Senckenberg Nature Museum in Frankfurt is supported by the City of Frankfurt am Main as well as numerous other partners. Additional information can be found at www.senckenberg.de.

The University of Tübingen is one of eleven universities judged excellent under the German government’s Excellence Initiative, and ranks well in international comparisons. Tübingen is one of the world’s foremost locations for neuroscientific research. Along with translational immunology and cancer research, microbiology and infection research, and molecular plant biology, it makes Tübingen a cutting-edge center of research in the Life Sciences. Further areas of core research are in Machine Learning, Geoscience and Environmental Science; Archaeology and Anthropology; Language and Cognition; and Education and the Media. More than 27,700 students from Germany and around the world are currently enrolled at the University of Tübingen, enjoying a broad spectrum of some 300 different study programs.

Press contact

Dr. Sören Dürr
Tel.: 069 7542-1580

Judith Jördens
Tel.: 069 7542-1434
Mobil: 0172-5842340

Anna Lena Schnettler
Tel.: 069 7542-1561

Dr. Alexandra Donecker
Tel.: 069 7542 1209

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18/08/2019 14:26:28


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