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ATMOSPHERIC OXYGEN, GIANT PALEOZOIC (大气中的氧气,巨大的古生代).pdf

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The Journal of Experimental Biology 201, 1043–1050 (1998) 1043 Printed in Great Britain © The Company of Biologists Limited 1998 JEB1378 ATMOSPHERIC OXYGEN, GIANT PALEOZOIC INSECTS AND THE EVOLUTION OF AERIAL LOCOMOTOR PERFORMANCE ROBERT DUDLEY* Department of Zoology, University of Texas, Austin, TX 78712, USA and Smithsonian Tropical Research Institute, PO Box 2072, Balboa, Republic of Panama *e-mail: r dudley@ Accepted 28 October 1997; published on WWW 24 March 1998 Summary Uniformitarian approaches to the evolution of terrestrial and were subsequently eliminated by a late Permian locomotor physiology and animal flight performance have transition to hypoxia. For extant organisms, the transient, generally presupposed the constancy of atmospheric chronic and ontogenetic effects of exposure to hyperoxic composition. Recent geophysical data as well as theoretical gas mixtures are poorly understood relative to models suggest that, to the contrary, both oxygen and contemporary understanding of the physiology of oxygen carbon dioxide concentrations have changed dramatically deprivation. Experimentally, the biomechanical and during defining periods of metazoan evolution. Hyperoxia physiological effects of hyperoxia on animal flight in the late Paleozoic atmosphere may have physiologically
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