globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2012.07.026
论文题名:
Selective extinction of Triassic marine reptiles during long-term sea-level changes illuminated by seawater strontium isotopes
作者: Kelley N.P.; Motani R.; Jiang D.-Y.; Rieppel O.; Schmitz L.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 400
起始页码: 9
结束页码: 16
语种: 英语
英文关键词: Durophagy ; Extinction ; Marine reptile ; Sea level ; Strontium isotopes ; Triassic
英文摘要: The relationship between cycles of sea-level change and marine diversity has long been the subject of debate. Large predators may be particularly sensitive to changes in habitat availability and marine productivity driven by changes in sea-level, especially those dependent on nearshore benthic food resources. To test this relationship, we compared the proportional diversity of differing marine reptile ecotypes through the Triassic with the isotopic composition of seawater strontium (87Sr/86Sr), a geochemical index linked to tectonically controlled sea-level change. The proportional abundance of marine reptiles adapted toward a diet of shelled prey rose during times of rapid sea-level rise and fell during times of rapid sea-level fall, while open water forms were more resistant to these changes. Our results indicate that the rate of sea-level change, rather than the absolute magnitude of sea-level or flooded shelf area, played a role in shaping patterns of ecological diversification and ecologically selective extinction during the Triassic. The link between the isotopic composition of seawater strontium and the evolution of marine reptiles demonstrates that sea-level change played an important role in the structuring of marine ecosystems over geologic time. © 2012 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69390
Appears in Collections:过去全球变化的重建

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作者单位: Department of Geology, University of California, 1 Shields Avenue, Davis, CA 95616, United States; Geological Museum and Department of Geology, School of Earth and Space Sciences, Peking University, Yiheyuan Street 5, Haidian District, Beijing 100871, China; Department of Geology, The Field Museum, 1400 South Lake Shore Drive, Chicago, IL, 60605-2496, United States; Department of Evolution and Ecology, University of California, 1 Shields Avenue, Davis, CA 95616, United States

Recommended Citation:
Kelley N.P.,Motani R.,Jiang D.-Y.,et al. Selective extinction of Triassic marine reptiles during long-term sea-level changes illuminated by seawater strontium isotopes[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,400
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