Abstract
Stable carbon and oxygen isotopes have been observed in dinosaur eggshell samples, identified asMacroolithus yaotunensis, collected in two sections of the Nanxiong Basin, Guangdong Province, South China. Multiple positive δ18O perturbations that occurred during the K/T transition of about 150 ka suggest that there may have been at least three periods of the extreme dry climate with a mean annual air temperature over 27δC. δ13C ranges from -8.37% to -11.60% of the dinosaur eggshells, added to the metabolic enrichment of 16%, may indicate that the dinosaurs represented by this type of eggshells probably consumed the plant species of C3 type with the δ13C values of -24.3%— -27.6‰ Moreover, the trend toward more negative δ13C values of the eggshells during the K/T transition could be an indirect consequence of a lasting increase in atmospheric CO2 concentration.
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Zhao, Z. K., Mao, X. Y., Chai, C. F. et al., Iridium anomalies in dinosaur eggshells at the K/T boundary in the Nanxiong Basin, South China, Science in China (in Chinese), Ser. D, 1998, 28(5): 425.
Erben, H. K., Ashraf, A. R., Bohm, H. et al., Die Kreide/Tertiar in Nanxiong-Becken (Kontinentalfazies, Sudostchina), Erdwiss Forsch. Akad. Wiss. Lit. Mainz, Bd., 1995, 32: 1.
Young, C. C., Fossil eggs from Nanhsiung, Kwantung and Kanchou, Kiangsi, Vert. PalAsia, 1965, 9(2): 141.
Zhao, Z. K., The microstructures of the dinosaurian eggshells of Nanxiong Basin, Guangdong Province (I): On the classification of dinosaur eggs, Vert. PalAsia, 1975, 13(2): 105.
Zhao, Z. K., Ye, J., Li, H. M. et al., Extinction of the dinosaurs across the Cretaceous-Tertiary boundary in Nanxiong Basin, Guangdong Province, Vert. PalAsia, 1991, 29(1): 1.
Yang, W. D., Chen, N. S., Ni, S. J. et al., Carbon and oxygen isotopic compositions of the carbonate rocks and the dinosaur eggshells in the Cretaceous red beds and their implication for paleoenvironment, Chinese Science Bulletin, 1993, 38(23): 1985.
Zhao, Z. K., Structure, formation, and evolutionary trends of dinosaur eggshell, in Structure, Formation and Evolution of Fossil Hard Tissues ((eds. Kobayashi, I., Mutvei, H., Sahni, A.), Tokyo: Tokai Univ. Press, 1993, 195–212.
Zhao, Z. K., The dinosaur eggs in China: on the structure and evolution of eggshells, in Dinosaur Eggs and Babies ((eds. Carpenter, K., Hirsch, K. F., Horner, J. R.), Cambridge: Cambridge University Press, 1994, 184–203.
Folinsbee, R. E., Fritz, P., Krouse, H. R. et al., Carbon-13 and oxygen-18 in dinosaur, crocodile and bird eggshells indicate environmental conditions, Science, 1970, 168: 1353.
Erben, H. K., Hoefs, J., Wedpohl, K. H., Paleobiological and isotopic studies of eggshells from a declining dinosaur species, Paleobiology, 1979, 5(4): 380.
Sarkar, A., Bhattacharya, S. K., Mohabey, D. M., Stable-isotope analyses of dinosaur eggshells: Paleoenviornmental implications, Geology, 1991, 19: 1068.
Lin, Z. F., Application of stable carbon isotope in plant physiology and ecology, Plant Physiology Communications (in Chinese), 1990, 3: 1.
Pearcy, R. W., Ehleringer, J., Comparative ecophysiology of C3 and C4 plants, Plant Cell and Environment, 1984, 7: 1.
von Schironding, Y., Van der Verwe, N. J., Vogel, J. C., Influence of diet and age on carbon isotope ratios in ostrich eggshell, Archaeometry, 1982, 24: 3.
Schaffner, F. C., Swart, P. K., Influence of diet and environemntal water on the carbon and oxygen isotopic signatures of seabird eggshell carbonate, Bulletin of Marine Science, 1991, 48: 23.
Keeling, C. D., Mook, W. G., Tans, P. P., Recent trends in the13C /12C ratio of atmospheric carbon dioxide, Nature, 1979, 277: 121.
Francey, R. J., Farquhar, G. D., An explanation of C13 / C12 variations in tree rings, Nature, 1982, 297: 28.
Stuiver, M., Braziunas, T. F., Tree cellulose13C /12C isotope ratios and climatic change, Nature, 1987, 328: 58.
Osmond, C. B., Winter, K., Ziegler, H., Functional significance of differenet pathways of of CO2 fixation in photosynthesis., in Encyclopedia Plant Physiology, New Series ((eds. Lange, O. L., Nobel, P. S., Osmond, C. B. et al.), Berlin, Heidelberg, New York: Springer-Verlag, 1982, 12B: 4480.
Penuelas, J., Azcon-Bieto, J., Changes in leaf13C of herbarium plant species during the last 3 centuries of CO2 increase, Plant, Cell and Environment, 1992, 15: 485.
Lin, Z. F., Liang, C., Peng, C. L. et al., Effect of human activity on C13/C12 ratios in tree rings ofPinus massoniana on Dinghushan, ActaEcologica Sinica, 1997, 17(2): 124.
McLean, D. M., Deccan Traps mantle degassing in the terminal Cretaceous marine extinctions, Cretaceous Research, 1985, 6: 235.
McLean, D. M., Impact winter in the global K/T extinctions: no definitive evidences, in Glogal Biomass Burning: Atmospheric, Climatic, and Biospheric Implications ((ed. Levine, J. S.), Cambridge: The MIT Press, 1991, 493–508.
McLean, D. M., K-T transition greenhouse and embryogenesis dysfunction in the dinosaurian extinctions, Journal of Geological Education, 1995, 43: 517.
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Zhao, Z., Yan, Z. Stable isotopic studies of dinosaur eggshells from the Nanxiong Basin, South China. Sci. China Ser. D-Earth Sci. 43, 84–92 (2000). https://doi.org/10.1007/BF02877833
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DOI: https://doi.org/10.1007/BF02877833