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Ediacaran-Cambrian microbial reef transition and geobiological background

埃迪卡拉纪-寒武纪微生物礁转变及地球生物学背景

基本信息

批准号：
21K03738
负责人：
足立奈津子
金额：
$ 2.66万
依托单位：
Osaka Metropolitan University (2022)Osaka City University (2021)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2021
资助国家：
日本
起止时间：
2021-04-01 至 2024-03-31
项目状态：
已结题

项目摘要

エディアカラ紀末から前期カンブリア紀は，骨格を備えた生物が出現し，急激な生物放散が生じた地球生命史において重要な時代の一つである．生物放散とともに，礁生態系でも造礁骨格生物 (古杯類) が登場し，礁の構築に関与した．しかし，同時期に，微生物類礁の構成要素の大きな転換が生じたことはほとんど知られていない．エディアカラ紀末から前期カンブリア紀での礁生態系の変遷過程と背後の海洋環境の変化を明らかにするために検討を進めている．北中国における顕生累代最古の石灰質微生物類礁に相当する，山東省に分布する朱砂洞層 (カンブリア系第二統第四階) の礁について引き続き検討を進めた．本礁は，古杯類を産出しないものの，豊富で，多様な石灰質微生物類によって構築された．カンブリア紀に入って石灰質微生物類は多様性を急激に増大させたが，本礁の例は，造礁骨格生物の提供する三次元的な枠組み構造 (多様なニッチ) の有無にかかわらず，多様な石灰質微生物類が当時繁栄し，礁の構築に重要な役割を果たし得たことを示している．また，古杯類の消滅した前期カンブリア紀以降，石灰質微生物類の多様性は激減した．カンブリア紀－オルドビス紀を通じた石灰質微生物類の多様性変化や微生物物類礁の量的な変化，地球生物環境との関係についても，北中国と南中国での微生物類礁の特性変化の観点から検討を進めている．上記の研究成果は，国際・国内学会および国際学術誌にて発表また発表準備を進めている．

At the end of the century, the beginning of the century, the bones of the body, the preparation of the organism, the emergence of the organism, the rapid release of the organism, the important era of the life history of the earth. Biological dispersal, reef ecosystem, reef-building skeleton organisms (palaeochalices) are emerging, reef construction is related to and. At the same time, the composition elements of microbial reefs changed greatly. The evolution of marine environment behind the transition process of reef ecosystems from the end of the century to the beginning of the century The most ancient calcareous microbial reefs in North China are distributed in the Zhushadong Formation (the fourth order of the Second Series) in Shandong Province. This reef is rich in ancient species and rich in calcareous microorganisms. The diversity of calcareous microorganisms is increasing rapidly during the development of the reef. In this reef, for example, there is no change in the structure of three-dimensional structure (diversity) provided by reef-building organisms. The diversity of calcareous microorganisms is increasing rapidly during the development of the reef, and the important service of reef structure is obtained. Moreover, since the early days of the eradication of ancient cup species, the diversity of calcareous microorganisms has declined sharply. The diversity of calcareous microorganisms and the variation of microbial reef quantity are discussed in this paper. The relationship between the ceramic environment and the earth is discussed. The characteristics of microbial reefs in North China and South China are discussed in this paper. The research achievements mentioned above are ready for development by international and domestic societies and international academic journals.