Multistage evolution of Metazoa

后生动物的多阶段进化

• 批准号: 23340152
• 负责人: KOMIYA Tsuyoshi
• 金额: $ 12.98万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23340152/
• 关键词: エディアカラ紀; カンブリア爆発; 後生動物出現; 生命進化; 古環境解読; 掘削; 多元素・多同位体分析; カンブリア紀; 南中国; 海洋栄養塩濃度; 多元素多同位体解析

We obtained chemostratigraphies of C, O, Sr, Fe and Ca isotopes and Fe, Mn, REE and P contents of carbonates, Mo isotopes of black shales and C and N of organic matter from the Ediacaran to the Early Cambrian to estimate primary productivity, continental influx, temperature, nutrient contents, and redox condition of seawater, using twenty-four drill cores in South China. The results suggest that the emergence of Metazoan was caused under the less oxic and P-rich condition, whereas the diversification occurred under oxic, nitrate and Ca-rich condition. Especially, the transition from P to nitrate-rich seawater contributed to more actively mobile metazoans through increase in Redfield ratio. The biological evolution occurred just after increase in nutrients, allowing a new insight of biological evolution of metazoans. The quick response of biological evolution to the environments suggests that the fundamental base for biological functions were already established before the emergence.

利用华南埃迪卡拉纪至早寒武世24个钻孔岩心，获得了碳酸盐岩的C、O、Sr、Fe、Ca同位素和Fe、Mn、REE、P含量，黑色页岩的Mo同位素和有机质的C、N等化学地层学资料，估算了华南埃迪卡拉纪至早寒武世的初级生产力、大陆流入量、温度、营养盐含量和海水氧化还原条件。结果表明，后生动物的出现是在缺氧和富磷条件下发生的，而分化则发生在好氧、硝酸盐和富钙条件下。特别是，从P到硝酸盐丰富的海水的过渡有助于更积极的移动的后生动物通过增加Redfield比率。生物进化发生在营养物质增加之后，这为后生动物的生物进化提供了新的视角。生物进化对环境的快速反应表明，生物功能的基本基础在出现之前就已经建立。

项目成果

The oxygen isotope composition of earth's oldest rocks and evidence of a terrestrial magma ocean

• DOI: 10.1002/ggge.20128
• 发表时间: 2013-06
• 期刊: Geochemistry
• 影响因子: 3.7
• 作者: D. Rumble;S. Bowring;T. Iizuka;T. Komiya;A. Lepland;M. Rosing;Y. Ueno

The anomalous Ca cycle in the Ediacaran ocean: Evidence from Ca isotopes preserved in carbonates in the Three Gorges area, South China

埃迪卡拉纪海洋的异常Ca循环：来自华南三峡地区碳酸盐岩中Ca同位素的证据

• DOI: 10.1016/j.gr.2013.03.008
• 发表时间: 2014-04
• 期刊: Gondwana Research
• 影响因子: 6.1
• 作者: Takafumi Hirata;Shigenori Maruyama;Jian Han;Degan Shu
• 通讯作者: Degan Shu

Search for Early Archean mantle lacking the late-veneer component

寻找缺乏晚饰面成分的早期太古代地幔

• 发表时间: 2012
• 作者: Ishikawa;A.
• 通讯作者: A.

Reproductive strategy of the bradoriid arthropod Kunmingella douvillei from the Lower Cambrian Chengjiang Lagerstatte, South China

• DOI: 10.1016/j.gr.2013.03.011
• 发表时间: 2014-04-01
• 期刊: GONDWANA RESEARCH
• 影响因子: 6.1
• 作者: Duan, Yanhong;Han, Jian;Shu, Degan
• 通讯作者: Shu, Degan

The oldest accretionary complex and the beginning of the Pacific-type orogeny based on geology of the 3.96 Ga Nulliak supracrustal rocks in Labrador

根据拉布拉多 3.96 Ga Nulliak 表壳岩的地质学，最古老的增生杂岩和太平洋型造山运动的开始

• 发表时间: 2013
• 作者: Komiya;T.;Yamamoto;S.;Shimojo;M. & Aoki;S.
• 通讯作者: S.