globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.02.016
论文题名:
Biological and physical evidence for extreme seasonality in central Permian Pangea
作者: Looy C.V.; Ranks S.L.; Chaney D.S.; Sanchez S.; Steyer J.-S.; Smith R.M.H.; Sidor C.A.; Myers T.S.; Ide O.; Tabor N.J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 451
起始页码: 210
结束页码: 226
语种: 英语
英文关键词: Central Pangea ; Climate ; Desert ; Niger ; Paleobiology ; Permian
英文摘要: Climate models indicate increased desertification in the continental interior of Pangea during the Permian, which would have affected the composition of the flora and fauna. We present a multi-proxy paleoenvironmental reconstruction of a terrestrial ecosystem in central Pangea of Lopingian age. The reconstruction is based on biological and physical data from the Moradi Formation, located in the Tim Mersoi sub-Basin, northern Niger. Paleosols and sedimentological evidence indicate that the prevailing climate was semi-arid to very arid with marked intervals of high water availability. Carbon stable isotope data from organic matter and paleosols suggest that both the soil productivity and actual evapotranspiration were very low, corresponding to arid conditions. Histological analysis of pareiasaur bones shows evidence of active metabolism and reveals distinct growth marks. These interruptions of bone formation are indicative of growth rhythms, and are considered as markers for contrasting seasonality or episodic climate events. The macrofossil floras have low diversity and represent gymnosperm-dominated woodlands. Most notable are ovuliferous dwarf shoots of voltzian conifers, and a 25-m long tree trunk with irregularly positioned branch scars. The combined biological and physical evidence suggests that the Moradi Formation was deposited under a generally arid climate with recurring periods of water abundance, allowing for a well-established ground water-dependent ecosystem. With respect to its environment, this system is comparable with modern ecosystems such as the southern African Namib Desert and the Lake Eyre Basin in Australia, which are discussed as modern analogues. © 2016 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/68441
Appears in Collections:过去全球变化的重建

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作者单位: Department of Integrative Biology and Museum of Paleontology, University of California, Berkeley, Berkeley, CA, United States; Department of Paleobiology, NMNH Smithsonian Institution, Washington, DC, United States; Department of Physiology and Developmental Biology, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18A, Uppsala, Sweden; Centre de Recherches en Paleobiodiversite et Paleoenvironnements (UMR 7207 CNRS-MNHN-UPMC), Muséum national d'Histoire naturelle, CP 38, 8 rue Buffon, Paris, France; Karoo Palaeontology, Iziko: South African Museum, Cape Town, South Africa; Evolutionary Studies Institute, University of Witwatersrand, 1 Jan Smuts Avenue, Johannesburg, South Africa; Burke Museum and Department of Biology, University of Washington, Seattle, WA, United States; Huffington Department of Earth Sciences, Southern Methodist University, Dallas, TX, United States; Institut de Recherches en Sciences Humaines, Niamey, Niger

Recommended Citation:
Looy C.V.,Ranks S.L.,Chaney D.S.,et al. Biological and physical evidence for extreme seasonality in central Permian Pangea[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,451
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