Search

Your search keyword '"Barrett, Paul M"' showing total 3,049 results
Start Over Author "Barrett, Paul M"
3,049 results on '"Barrett, Paul M"'

3. 100 million years of turtle paleoniche dynamics enable the prediction of latitudinal range shifts in a warming world.

Author

Chiarenza, Alfio Alessandro, Waterson, Amy M, Schmidt, Daniela N, Valdes, Paul J, Yesson, Chris, Holroyd, Patricia A, Collinson, Margaret E, Farnsworth, Alexander, Nicholson, David B, Varela, Sara, and Barrett, Paul M

Subjects
Animals, Turtles, Probability, Ecosystem, Fresh Water, Climate Change, Eocene, Late Cretaceous, Testudinata, climate change, distribution, ecological niche modeling, Climate Action, Biological Sciences, Medical and Health Sciences, Psychology and Cognitive Sciences, Developmental Biology
Abstract

Past responses to environmental change provide vital baseline data for estimating the potential resilience of extant taxa to future change. Here, we investigate the latitudinal range contraction that terrestrial and freshwater turtles (Testudinata) experienced from the Late Cretaceous to the Paleogene (100.5-23.03 mya) in response to major climatic changes. We apply ecological niche modeling (ENM) to reconstruct turtle niches, using ancient and modern distribution data, paleogeographic reconstructions, and the HadCM3L climate model to quantify their range shifts in the Cretaceous and late Eocene. We then use the insights provided by these models to infer their probable ecological responses to future climate scenarios at different representative concentration pathways (RCPs 4.5 and 8.5 for 2100), which project globally increased temperatures and spreading arid biomes at lower to mid-latitudes. We show that turtle ranges are predicted to expand poleward in the Northern Hemisphere, with decreased habitat suitability at lower latitudes, inverting a trend of latitudinal range contraction that has been prevalent since the Eocene. Trionychids and freshwater turtles can more easily track their niches than Testudinidae and other terrestrial groups. However, habitat destruction and fragmentation at higher latitudes will probably reduce the capability of turtles and tortoises to cope with future climate changes.

Published
2023

4. Tracing the patterns of non‐marine turtle richness from the Triassic to the Palaeogene: from origin to global spread

Author

Cleary, Terri J, Benson, Roger BJ, Holroyd, Patricia A, and Barrett, Paul M

Subjects
Life Below Water, Testudinata, turtle, species-richness, Mesozoic, Palaeogene, subsampling, Geology, Ecology, Evolutionary Biology, Paleontology
Abstract

Turtles are key components of modern vertebrate faunas and their diversity and distributions are likely to be affected by anthropogenic climate change. However, there is limited baseline data on turtle taxonomic richness through time or assessment of their past responses to global environmental change. We used the extensive Triassic–Palaeogene (252–223 Ma) fossil record of terrestrial and freshwater turtles to investigate diversity patterns, finding substantial variation in richness through time and between continents. Globally, turtle richness was low from their Triassic origin until the Late Jurassic. There is strong evidence for high richness in the earliest Cretaceous of Europe, becoming especially high following the Cretaceous Thermal Maximum and declining in all continents by the end-Cretaceous. At the K–Pg boundary, South American richness levels changed little while North American richness increased, becoming very high during the earliest Palaeogene (Danian). Informative data are lacking elsewhere for this time period. However, the Selandian–Thanetian interval, approximately 5 myr after the K–Pg mass extinction, shows low turtle richness in Asia, Europe and South America, suggesting that the occurrence of exceptional turtle richness in the post-extinction Paleocene fauna of North America is not globally representative. Richness decreased over the Eocene–Oligocene boundary in North America but increased to its greatest known level for Europe, implying very different responses to dramatic climatic shifts. Time series regressions suggest number of formations sampled and palaeotemperature are the primary influencers of face-value richness counts, but additional factors not tested here may also be involved.

Published
2020

21. A new pterosaur from the Middle Jurassic of Skye, Scotland and the early diversification of flying reptilesCitation for this article: Martin-Silverstone, E. M., Unwin, D. M., Cuff, A. R., Brown, E. E., Allington-Jones, L., & Barrett, P. M. (2024) A new pterosaur from the Middle Jurassic of Skye, Scotland and the early diversification of flying reptiles. Journal of Vertebrate Paleontology . https://doi.org/10.1080/02724634.2023.2298741

Author

Martin-Silverstone, Elizabeth, primary, Unwin, David M., additional, Cuff, Andrew R., additional, Brown, Emily E., additional, Allington-Jones, Lu, additional, and Barrett, Paul M., additional

Published
2024
Full Text
View/download PDF

25. A new Late Triassic sauropodomorph dinosaur from the Mid-Zambezi Basin, Zimbabwe.

Author

BARRETT, PAUL M., CHAPELLE, KIMBERLEY E. J., SCISCIO, LARA, BRODERICK, TIMOTHY J., ZONDO, MICHEL, MUNYIKWA, DARLINGTON, and CHOINIERE, JONAH N.

Subjects
*SHORELINES, *HINDLIMB, *ASTRAGALUS (Plants), *TIBIA, *FEMUR
Abstract

An articulated partial hind limb collected from the Pebbly Arkose Formation (Norian, Upper Triassic) of the Upper Karoo Group of Zimbabwe is described as a new taxon of sauropodomorph dinosaur. Musankwa sanyatiensis gen. et sp. nov. was discovered on the shoreline of Lake Kariba, on Spurwing Island in the Mid-Zambezi Basin. The holotype consists of a right femur, tibia, and astragalus, and can be distinguished from all other Late Triassic massopodan sauropodomorphs on the basis of numerous features, which form a unique character combination. Phylogenetic analysis recovers the new taxon as the earliest-branching lineage within Massopoda. Musankwa is only the fourth dinosaur to be named from the Karoo-aged basins of Zimbabwe and further demonstrates the high potential of this region for discoveries of new early dinosaur material. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

38. Open data and digital morphology

Author

Davies, Thomas G., Rahman, Imran A., Lautenschlager, Stephan, Cunningham, John A., Asher, Robert J., Barrett, Paul M., Bates, Karl T., Bengtson, Stefan, Benson, Roger B. J., Boyer, Doug M., Braga, José, Bright, Jen A., Claessens, Leon P. A. M., Cox, Philip G., Dong, Xi-Ping, Evans, Alistair R., Falkingham, Peter L., Friedman, Matt, Garwood, Russell J., Goswami, Anjali, Hutchinson, John R., Jeffery, Nathan S., Johanson, Zerina, Lebrun, Renaud, Martínez-Pérez, Carlos, Marugán-Lobón, Jesús, O'Higgins, Paul M., Metscher, Brian, Orliac, Maëva, Rowe, Timothy B., Rücklin, Martin, Sánchez-Villagra, Marcelo R., Shubin, Neil H., Smith, Selena Y., Starck, J. Matthias, Stringer, Chris, Summers, Adam P., Sutton, Mark D., Walsh, Stig A., Weisbecker, Vera, Witmer, Lawrence M., Wroe, Stephen, Yin, Zongjun, Rayfield, Emily J., and Donoghue, Philip C. J.

Published
2017

Catalog

Books, media, physical & digital resources
See catalog results