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Biological and phys...
Biological and physical evidence for extreme seasonality in central Permian Pangea
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- Looy, Cindy V. (författare)
- Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA.;Univ Calif Berkeley, Museum Paleontol, Berkeley, CA 94720 USA.
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- Ranks, Stephanie L. (författare)
- Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA.;Univ Calif Berkeley, Museum Paleontol, Berkeley, CA 94720 USA.
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- Chaney, Dan S. (författare)
- Smithsonian Inst, NMNH, Dept Paleobiol, Washington, DC 20560 USA.
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- Sanchez, Sophie (författare)
- Uppsala universitet,Evolution och utvecklingsbiologi
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- Steyer, Jean-Sebastien (författare)
- UPMC, Ctr Rech Paleobiodivers & Paleoenvironnements, MNHN, UMR 7207,CNRS, CP 38,8 Rue Buffon, F-75005 Paris, France.
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- Smith, Roger M. H. (författare)
- Iziko South African Museum, Karoo Palaeontol, ZA-8000 Cape Town, South Africa.;Univ Witwatersrand, Evolutionary Studies Inst, 1 Jan Smuts Ave, ZA-2000 Johannesburg, South Africa.
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- Sidor, Christian A. (författare)
- Univ Washington, Burke Museum, Seattle, WA 98195 USA.;Univ Washington, Dept Biol, Seattle, WA 98195 USA.
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- Myers, Timothy S. (författare)
- So Methodist Univ, Huffington Dept Earth Sci, Dallas, TX 75275 USA.
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- Ide, Oumarou (författare)
- Inst Rech Sci Humaines, Niamey, Niger.
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- Tabor, Neil J. (författare)
- So Methodist Univ, Huffington Dept Earth Sci, Dallas, TX 75275 USA.
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Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA;Univ Calif Berkeley, Museum Paleontol, Berkeley, CA 94720 USA. Smithsonian Inst, NMNH, Dept Paleobiol, Washington, DC 20560 USA. (creator_code:org_t)
- Elsevier BV, 2016
- 2016
- Engelska.
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Ingår i: Palaeogeography, Palaeoclimatology, Palaeoecology. - : Elsevier BV. - 0031-0182 .- 1872-616X. ; 451, s. 210-226
- Relaterad länk:
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http://manuscript.el...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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 orepisodic 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.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Annan geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Other Earth and Related Environmental Sciences (hsv//eng)
Nyckelord
- Niger
- Permian
- Central Pangea
- Climate
- Desert
- Paleobiology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Looy, Cindy V.
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Ranks, Stephanie ...
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Chaney, Dan S.
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Sanchez, Sophie
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Steyer, Jean-Seb ...
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Smith, Roger M. ...
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visa fler...
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Sidor, Christian ...
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Myers, Timothy S ...
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Ide, Oumarou
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Tabor, Neil J.
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Uppsala universitet