中国中生代木化石研究新进展:多样性变化及古气候波动

发布时间：2018-06-17 11:21

本文选题：木化石 + 多样性变化　；参考：《地学前缘》2017年01期

【摘要】：作为植物化石的重要组成部分,木化石不仅在探究地质历史时期植物群的组成特征和植物界演化方面发挥着重要作用,而且也是反映陆地生态系统古气候变化和古生态环境重建的重要证据之一。中国中生代木化石不仅数量丰富,而且类型多样,研究成果丰硕。近年来,在四川、重庆、云南、辽西和新疆等三叠纪—白垩纪化石产地和层位陆续发现了一批木化石新材料,进一步丰富了我们对中国中生代木化石的多样性的认识,并在利用木化石揭示三叠纪至白垩纪陆相古气候特征和变化方面取得积极进展。文中重点介绍在四川盆地晚三叠世、辽西侏罗纪燕辽生物群及早白垩世热河生物群中的木化石新发现并分析其古气候指示意义,揭示上述化石所反映的气候降温事件、古气候波动及其与带毛恐龙出现的关系等。通过对中生代木化石多样性演化、时空分布模式以及木材生长轮解剖特征的研究和分析揭示侏罗纪和白垩纪的古气候整体特征,并对中国中生代木化石研究领域存在的问题和未来的研究方向提出展望。
[Abstract]:As an important part of plant fossils, wood fossils not only play an important role in exploring the composition and evolution of flora in geological history. It is also one of the important evidences to reflect paleoclimate change and paleo-ecological environment reconstruction of terrestrial ecosystem. The Mesozoic wood fossils in China are not only abundant in quantity, but also in various types. In recent years, in Sichuan, Chongqing, Yunnan, western Liaoning and Xinjiang, a number of new materials of wood fossils have been discovered in the Triassic and Cretaceous fossil habitats, further enriching our understanding of the diversity of Mesozoic wood fossils in China. Positive progress has been made in the use of wood fossils to reveal the characteristics and changes of continental paleoclimate from Triassic to Cretaceous. This paper focuses on the discovery of wood fossils from the Jurassic Yanliao biota in the late Triassic and early Cretaceous Jehol biota in Sichuan Basin, and analyses its paleoclimatic indication significance, which reveals the climate cooling events reflected by the above fossils. Paleoclimate fluctuation and its relationship with the appearance of hairy dinosaurs. The diversity evolution, temporal and spatial distribution patterns and anatomical characteristics of wood growth rings of Mesozoic wood fossils were studied and analyzed to reveal the overall paleoclimate characteristics of Jurassic and Cretaceous. At the same time, the problems in the research of Mesozoic wood fossils in China and the future research directions are put forward.
【作者单位】：中国科学院南京地质古生物研究所;现代古生物学和地层学国家重点实验室;沈阳师范大学古生物学院;国土资源部东北亚古生物演化重点实验室;中国地质科学院;中国地质调查局沈阳地质调查中心;
【基金】：国家重点基础研究发展计划“973”项目(2012CB822003) 国家自然科学基金项目(41272010,41302004,41402004,41572014,41472011) 中国科学院战略性先导项目(XDB18030502);中国科学院科技交叉与合作创新团队项目国家重点研发计划(2016YFC0600406) 现代古生物学和地层学国家重点实验室自主项目(20161102) 开放基金项目(133113)
【分类号】：Q914

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