Determining the nature and drivers of Earth's first metazoan radiation and subsequent extinction: The Cambrian 'Explosion' and Sinsk Event
确定地球第一次后生动物辐射和随后的灭绝的性质和驱动因素:寒武纪“爆炸”和辛斯克事件
基本信息
- 批准号:NE/Z000122/1
- 负责人:
- 金额:$ 106.97万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Research Grant
- 财政年份:2024
- 资助国家:英国
- 起止时间:2024 至 无数据
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
The Cambrian Radiation, starting ca. 540 million years ago (Ma), marks the appearance of abundant and diverse animals (metazoans) in the fossil record. This radiation may have been driven by oscillating ocean oxygenation and productivity events, but was terminated by the first mass extinction, the 'Sinsk Event', ca. 513 Ma. The Sinsk Event is considered to have been a hyperthermal interval of widespread ocean anoxia that reset the trajectory for all subsequent metazoan life. However, despite its significance for the course of Earth's habitability and the evolution of complex life, little is known about the drivers of this event, or which environmental factors controlled extinction selectivity. We hypothesise that it was low oceanic sulphate levels that promoted oscillating oxygenation, so creating pulsed metazoan radiations, but paradoxically this also made the early Cambrian shallow ocean highly susceptible to anoxia in response to global warming, thereby terminating these radiations with a profound extinction. We propose an ambitious integrated palaeobiological, geochemical and modelling approach to unravel the controlling processes of radiations, and the consequences of the enigmatic, but highly significant, Sinsk Event. By comparing the drivers of the Cambrian Radiation with those of its demise, we will address a fundamental motivating question: Did low sulphate seas both promote radiations and drive extinctions through Earth History?
大约5.4亿年前(Ma)开始的寒武纪辐射,标志着化石记录中丰富多样的动物(后生动物)的出现。这种辐射可能是由振荡的海洋氧合和生产力事件驱动的,但被第一次大灭绝,即大约513 Ma的“辛斯克事件”所终止。辛斯克事件被认为是一个广泛的海洋缺氧的高温期,它重置了所有后来的后生动物生命的轨迹。然而,尽管它对地球的宜居性和复杂生命的进化过程具有重要意义,但人们对这一事件的驱动因素知之甚少,也不知道哪些环境因素控制了灭绝的选择性。我们假设是低的海洋硫酸盐水平促进了振荡氧合,因此产生了脉冲后生动物辐射,但矛盾的是,这也使寒武纪早期的浅海极易受到全球变暖的缺氧影响,从而以一场深刻的灭绝来终止这些辐射。我们提出了一种雄心勃勃的综合古生物学,地球化学和建模方法来解开辐射的控制过程,以及神秘但非常重要的Sinsk事件的后果。通过比较寒武纪辐射和寒武纪灭绝的驱动因素,我们将解决一个基本的激励问题:在地球历史上,低硫酸盐海洋是否既促进了辐射,又导致了物种灭绝?
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Rachel Wood其他文献
Aplasic phantoms and the mirror neuron system: An enactive, developmental perspective
发育不全的幻影和镜像神经元系统:一个积极的、发展的视角
- DOI:
- 发表时间:
2009 - 期刊:
- 影响因子:0
- 作者:
Rachel Wood;S. Stuart - 通讯作者:
S. Stuart
10: The LEEP and cone conundrum: The role of cumulative excised depth in predicting preterm birth
- DOI:
10.1016/j.ajog.2019.11.026 - 发表时间:
2020-01-01 - 期刊:
- 影响因子:
- 作者:
Danielle M. Panelli;Rachel Wood;Kevin Elias;Whitfield Growdon;Anjali J. Kaimal;Sarah Feldman;Thomas F. McElrath - 通讯作者:
Thomas F. McElrath
After the Achaemenids : exchange, transmission and transformation in the visual culture of Babylonia, Iran and Bactria c.330-c.100 BC
阿契美尼德王朝之后:公元前 330-100 年巴比伦、伊朗和大夏视觉文化的交流、传播和转变
- DOI:
- 发表时间:
2012 - 期刊:
- 影响因子:0
- 作者:
Rachel Wood - 通讯作者:
Rachel Wood
Evolving Lives: The Individual Historical Dimension in Evolution
进化的生命:进化中的个体历史维度
- DOI:
10.1007/3-540-44811-x_84 - 发表时间:
2001 - 期刊:
- 影响因子:0
- 作者:
Rachel Wood - 通讯作者:
Rachel Wood
Racial and ethnic differences in 39-week induction of labor and cesarean delivery in low-risk populations
- DOI:
10.1016/j.ajog.2022.11.399 - 发表时间:
2023-01-01 - 期刊:
- 影响因子:
- 作者:
Rachel Wood;Taniya Walker;Taylor S. Freret;Mark A. Clapp;Sarah E. Little - 通讯作者:
Sarah E. Little
Rachel Wood的其他文献
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{{ truncateString('Rachel Wood', 18)}}的其他基金
NSF Postdoctoral Fellowship in Biology FY 2021: The invasive tradeoffs hypothesis: how does wetland plant removal affect microbial and nutrient linkages
2021 财年 NSF 生物学博士后奖学金:侵入性权衡假设:湿地植物的清除如何影响微生物和营养物的联系
- 批准号:
2109778 - 财政年份:2022
- 资助金额:
$ 106.97万 - 项目类别:
Fellowship Award
Resolving the enigmatic Precambrian-Cambrian boundary event (BACE)
解决神秘的前寒武纪-寒武纪边界事件(BACE)
- 批准号:
NE/T008458/1 - 财政年份:2020
- 资助金额:
$ 106.97万 - 项目类别:
Research Grant
Re-inventing the planet: the Neoproterozoic revolution in oxygenation, biogeochemistry and biological complexity
重新发明地球:氧合、生物地球化学和生物复杂性的新元古代革命
- 批准号:
NE/I005935/1 - 财政年份:2010
- 资助金额:
$ 106.97万 - 项目类别:
Research Grant
A Pilot LSC Designed to Expand Delaware's Science Education Reform Initiative into High School
旨在将特拉华州科学教育改革计划扩展到高中的试点 LSC
- 批准号:
0138796 - 财政年份:2002
- 资助金额:
$ 106.97万 - 项目类别:
Standard Grant
A Systemic Partnership to Improve the Teaching and Learning of Science for All Children
改善所有儿童科学教学的系统性合作伙伴关系
- 批准号:
9618984 - 财政年份:1997
- 资助金额:
$ 106.97万 - 项目类别:
Continuing Grant
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