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Les T rex adolescents ont évincé les espèces de dinosaures plus petites
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Teenage T-Rexes edged out smaller dinosaur species, says study
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Tyrannosaurus rex may have fundamentally re-shaped their communities by out-competing smaller rival species.
Science and is the first to examine community-scale dinosaur diversity while treating juveniles as their own ecological entity.
“Dinosaur communities were like shopping malls on a Saturday afternoon ̶ jam-packed with teenagers” explained Kat Schroeder, a graduate student in the UNM Department of Biology who led the study. “They made up a significant portion of the individuals in a species, and would have had a very real impact on the resources available in communities.” Dinosaur communities were like shopping malls on a Saturday afternoon – jam-packed with teenagers.”
Kat Schroeder, graduate student, UNM Department of Biology
Teenage T-Rexes edged out smaller dinosaur species, says study
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25/02/2021 - 20:04 A cameraman sets up a shot of a Tyrannosaurus rex Growth Series featuring a baby (C), juvenile (L) and young adult T. rex (R), in the Dinosaur Hall permanent exhibition at the Natural History Museum of Los Angeles ROBYN BECK AFP/File 3 min
Washington (AFP)
A team of US scientists has demonstrated that the offspring of huge carnivorous dinosaurs like Tyrannosaurus rex, who grew from the size of house cats to towering monsters, reshaped their ecosystems by outcompeting smaller rival species.
Their study, published in the journal Science on Thursday, helps answer an enduring mystery about the 150-million-year rule of dinosaurs: why were there many more large species compared to small, which is the opposite of what we see in land animals today?
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