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首页> 外文期刊>Journal of Asian earth sciences >Environment and ecology of East Asian dinosaurs during the Early Cretaceous inferred from stable oxygen and carbon isotopes in apatite
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Environment and ecology of East Asian dinosaurs during the Early Cretaceous inferred from stable oxygen and carbon isotopes in apatite

机译：从磷灰石中稳定的氧和碳同位素推断白垩纪早期东亚恐龙的环境和生态

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摘要

During the cold Late Barremian-Early Albian interval, terrestrial environments in East Asia were populated by rich and diverse vertebrate faunas characterized by a strong provincialism. The latitudinal gradient of temperature and the existence of geographic barriers likely accounted for some aspects of this heterogeneous distribution of faunas. Other factors, however, such as local environmental conditions and interactions within vertebrate communities, which could have influenced their distribution, have not yet been fully identified and understood. Therefore, new and published oxygen and carbon isotope compositions of apatite from Chinese and Thai reptiles (dinosaurs, crocodilians and turtles) have been analyzed and interpreted in terms of ecology, local air temperature and precipitation amounts. Differences in carbon and oxygen isotope compositions between various groups of sympatric plant-eating dinosaurs (sauropods, ornithopods and ceratopsians) indicate food resources partitioning among them most likely to avoid competition. Mid-latitude environments, where the Jehol Biota flourished, were submitted to cool temperate climatic conditions with Mean Air Temperature (MAT) of 10 ± 4 ℃ and Mean Annual Precipitations (MAP) of about 600 mm/yr compatible with the existence of forest environments. By contrast, sub-tropical regions, characterized by MAT of about 20-25 ℃ were either submitted to high amounts of seasonal precipitations (of about 1200 mm/yr in Thailand) or to significant aridity (MAP of about 400 mm/yr in South China). This difference in precipitation regime between Thailand and South China may be attributed to the occurrence of the Coastal Cordillera extending along the East margin of the South China block. These mountain ranges likely prevented humid air masses from the Pacific to penetrate some parts of South China, thus generating a "rain shadow effect". Mosaic environments characterizing East Asia during the Late Early Cretaceous may have acted as a cradle for the origination of advanced dinosaur taxa that subsequently radiated over Eurasia and North America during the Late Cretaceous.
机译：在寒冷的巴雷米亚晚期-早阿尔比间隔期间，东亚的陆地环境充满了以强省主义为特征的丰富多样的脊椎动物。温度的纬度梯度和地理障碍的存在可能解释了动物异质性分布的某些方面。但是，其他因素，例如当地的环境条件和脊椎动物群落内部的相互作用，可能会影响它们的分布，尚未得到充分的认识和理解。因此，已经从生态学，当地气温和降水量方面对中国和泰国爬行动物（恐龙，鳄鱼和海龟）的磷灰石新的和已发布的氧碳同位素组成进行了分析和解释。不同种类的同食植物恐龙（食足动物，食脚类动物和角足动物）之间碳和氧同位素组成的差异表明，食物资源之间的分配最有可能避免竞争。 Jehol Biota蓬勃发展的中纬度环境处于凉爽的温带气候条件下，平均气温（MAT）为10±4℃，年平均降水量（MAP）为约600 mm / yr，与森林环境相适应。相比之下，以MAT为特征的大约20-25℃的亚热带地区要么遭受大量季节性降水（泰国约1200 mm / yr），要么遭受严重干旱（南部MAP约400 mm / yr）。中国）。泰国和华南地区降水情况的差异可能归因于沿着华南地块东缘延伸的沿海山脉。这些山脉可能阻止了潮湿的空气团从太平洋渗透到华南部分地区，从而产生了“雨影效应”。在白垩纪晚期，以东亚为特征的马赛克环境可能是晚期恐龙类群起源的摇篮，而后者后来在白垩纪晚期辐射到欧亚大陆和北美。

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  • 来源
    《Journal of Asian earth sciences》 |2015年第2期|358-370|共13页
  • 作者

    Romain Amiot; Xu Wang; Zhonghe Zhou; Xiaolin Wang; Christophe Lecuyer; Eric Buffetaut; Frederic Fluteau; Zhongli Ding; Nao Kusuhashi; Jinyou Mo; Marc Philippe; Varavudh Suteethorn; Yuanqing Wang; Xing Xu;

  • 作者单位

    Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 142 Xi Zhi Men Wai DaJie, Beijing 100044, China,CNRS UMR 5276, Universite Claude Bernard Lyon 1 and Ecole Normaie Superieure de Lyon, 2, Rue Raphaeel Dubois, 69622 Villeurbanne Cedex, France;

    Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, 19 Beitucheng Xilu, Beijing 100029, China;

    Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 142 Xi Zhi Men Wai DaJie, Beijing 100044, China;

    Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 142 Xi Zhi Men Wai DaJie, Beijing 100044, China;

    CNRS UMR 5276, Universite Claude Bernard Lyon 1 and Ecole Normaie Superieure de Lyon, 2, Rue Raphaeel Dubois, 69622 Villeurbanne Cedex, France;

    CNRS UMR 8538, Laboratoire de Geologie de l'Ecole Normale Superieure, 24, Rue Lhomond, 75231 Paris Cedex 05, France;

    Institut de Physique du Globe de Paris, 2 place Jussieu, F- 75005 Paris, France;

    Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, 19 Beitucheng Xilu, Beijing 100029, China;

    Department of Earth's Evolution and Environment, Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan;

    Natural History Museum of Guangxi, 1-1 East Renmin Road, Nanning 530012, China;

    CNRS UMR 5276, Universite Claude Bernard Lyon 1 and Ecole Normaie Superieure de Lyon, 2, Rue Raphaeel Dubois, 69622 Villeurbanne Cedex, France;

    Palaeontological Research and Education Centre, Mahasarakham University, Thailand;

    Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 142 Xi Zhi Men Wai DaJie, Beijing 100044, China;

    Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 142 Xi Zhi Men Wai DaJie, Beijing 100044, China;

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  • 正文语种 eng
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  • 关键词

    Dinosaurs; Reptiles; Early Cretaceous; East Asia; Stable isotopes; Climate; Ecology;

    机译：恐龙;爬行动物;白垩纪早期;东亚;稳定同位素;气候;生态;

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