Superiority, Competition, and Opportunism in the Evolutionary Radiation of Dinosaurs
The rise and diversification of the dinosaurs in the Late Triassic, from 230 to 200 million years ago, is a classic example of an evolutionary radiation with supposed competitive replacement. A comparison of evolutionary rates and morphological disparity of basal dinosaurs and their chief "comp...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2008-09, Vol.321 (5895), p.1485-1488 |
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| creator | Brusatte, Stephen L Benton, Michael J Ruta, Marcello Lloyd, Graeme T |
| description | The rise and diversification of the dinosaurs in the Late Triassic, from 230 to 200 million years ago, is a classic example of an evolutionary radiation with supposed competitive replacement. A comparison of evolutionary rates and morphological disparity of basal dinosaurs and their chief "competitors," the crurotarsan archosaurs, shows that dinosaurs exhibited lower disparity and an indistinguishable rate of character evolution. The radiation of Triassic archosaurs as a whole is characterized by declining evolutionary rates and increasing disparity, suggesting a decoupling of character evolution from body plan variety. The results strongly suggest that historical contingency, rather than prolonged competition or general "superiority," was the primary factor in the rise of dinosaurs. |
| doi_str_mv | 10.1126/science.1161833 |
| format | Article |
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A comparison of evolutionary rates and morphological disparity of basal dinosaurs and their chief "competitors," the crurotarsan archosaurs, shows that dinosaurs exhibited lower disparity and an indistinguishable rate of character evolution. The radiation of Triassic archosaurs as a whole is characterized by declining evolutionary rates and increasing disparity, suggesting a decoupling of character evolution from body plan variety. 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| subjects | Adaptation, Biological Animals Biodiversity Biological Evolution Competition Dinosaurs Dinosaurs - anatomy & histology Dinosaurs - classification Early Jurassic epoch Earth sciences Earth, ocean, space Ecological competition Evolution Evolutionary biology Exact sciences and technology Extinction, Biological Mass extinction events Opportunistic behavior Paleobiology Paleontology Phylogeny Sample size Species extinction Taxa Vertebrate paleontology |
| title | Superiority, Competition, and Opportunism in the Evolutionary Radiation of Dinosaurs |
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