Collaborative Research: The Rise and Fall of the Neoproterozoic Era in Siberia: Connections between Tectonics, Ocean Chemistry, and Biologic Innovation
合作研究:西伯利亚新元古代的兴衰:构造、海洋化学和生物创新之间的联系
基本信息
- 批准号:2020593
- 负责人:
- 金额:$ 30.17万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2020
- 资助国家:美国
- 起止时间:2020-08-01 至 2024-07-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The co-evolution of life and environment is one of the most compelling stories in Earth's 4.5 billion year history. For eons, simple, single-celled organisms dominated the Earth's oceans, until the first organisms with a cell nucleus began to proliferate about a billion years ago. Then, in the geologic blink of an eye approximately 550 million years ago, complex animals burst onto the scene. The timing of these two extraordinary evolutionary events has been one of the most enduring mysteries in the natural sciences. In this proposal, the principal investigators test an intriguing hypothesis that both of these evolutionary transitions were catalyzed by major mountain-building events that delivered nutrients to the oceans, and changed the amount of biologically-critical oxygen available for use by marine organisms. To test this hypothesis, the science team will measure minute differences in the masses of the chemical elements lithium (Li) and uranium (U) preserved in ancient limestone deposits from Siberia. These rocks from Siberia preserve a spectacular record of life in the oceans across these two evolutionary transitions, and new data generated from this project aim to provide a fresh look at the fundamental processes that drive evolutionary change on Earth. The researchers will also lead a broad outreach program aimed at bringing field geology and university internships to high school students in Maryland and Virginia. Specifically, spectaculargeologic formations exposed in West Virginia will be presented to students both virtually and in person, with the broad goal of training the next generation of geoscientists.The 'big bang of eukaryotic evolution' across the Mesoproterozoic-Neoproterozoic transition, and the subsequent proliferation of animals across the Ediacaran-Cambrian transition, mark two of the most critical biological transformations in Earth history. Intriguingly, both of these evolutionary events are associated with intense periods of global mountain-building, which may have delivered nutrients and changed the redox balance of the ocean-atmosphere system. To test the linkages between global tectonics, ocean oxygenation, and biological innovation, this project will measure the isotopic composition of lithium (Li) and uranium (U) in marine carbonate successions from Siberia that span each of these critical transitions in Earth history. Li isotopes are a sensitive barometer for the silicate weathering system, and U isotopes are a powerful new tool for ocean redox quantification. Pairing these isotopes with sedimentological and paleontological data from fossil-rich successions in Siberia promises to provide new insights into the environmental conditions that accompanied early eukaryotic and animal evolution on Earth.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
生命和环境的共同进化是地球45亿年历史上最引人注目的故事之一。亿万年来,简单的单细胞生物体主导着地球的海洋,直到大约10亿年前第一批有细胞核的生物体开始繁殖。然后,在大约5.5亿年前一眨眼的地质时间里,复杂的动物突然出现在现场。这两个不同寻常的进化事件的发生时间一直是自然科学中最持久的谜团之一。在这项提议中,主要研究人员测试了一个有趣的假设,即这两个进化转变都是由向海洋输送营养物质的重大造山事件催化的,并改变了海洋生物可利用的生物关键氧气的数量。为了验证这一假设,科学团队将测量保存在西伯利亚古代石灰岩矿床中的化学元素锂(Li)和铀(U)质量的微小差异。这些来自西伯利亚的岩石保存了这两次进化过渡期间海洋中生命的壮观记录,该项目产生的新数据旨在为推动地球进化变化的基本过程提供新的视角。研究人员还将领导一个广泛的外展项目,旨在为马里兰州和弗吉尼亚州的高中生带来野外地质学和大学实习机会。具体地说,在西弗吉尼亚州暴露的壮观地质构造将以虚拟和面对面的方式向学生展示,其广泛的目标是培训下一代地球科学家。跨越中元古代-新元古代过渡的真核生物进化的大爆炸,以及随后跨越埃迪卡拉纪-寒武纪过渡的动物繁殖,标志着地球历史上最关键的两次生物变革。有趣的是,这两个进化事件都与全球造山的激烈时期有关,这可能提供了营养物质,改变了海洋-大气系统的氧化还原平衡。为了测试全球构造、海洋氧合作用和生物创新之间的联系,该项目将测量西伯利亚海相碳酸盐序列中锂(Li)和铀(U)的同位素组成,这些碳酸盐序列跨越地球历史上的每一次关键转变。锂同位素是硅酸盐风化体系的灵敏晴雨表,铀同位素是海洋氧化还原定量的有力新工具。将这些同位素与西伯利亚化石丰富的演替过程中的沉积学和古生物学数据配对,有望为地球上早期真核生物和动物进化所伴随的环境条件提供新的见解。这一奖项反映了NSF的法定使命,并通过使用基金会的智力优势和更广泛的影响审查标准进行评估,被认为值得支持。
项目成果
期刊论文数量(5)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Dynamic interplay of biogeochemical C, S and Ba cycles in response to the Shuram oxygenation event
- DOI:10.1144/jgs2021-081
- 发表时间:2021-10-26
- 期刊:
- 影响因子:2.7
- 作者:Cui, Huan;Kaufman, Alan J.;Guan, Chengguo
- 通讯作者:Guan, Chengguo
An authigenic response to Ediacaran surface oxidation: Remarkable micron-scale isotopic heterogeneity revealed by SIMS
- DOI:10.1016/j.precamres.2022.106676
- 发表时间:2022-05-31
- 期刊:
- 影响因子:3.8
- 作者:Cui, Huan;Kitajima, Kouki;Valley, John W.
- 通讯作者:Valley, John W.
Deposition or diagenesis? Probing the Ediacaran Shuram excursion in South China by SIMS
- DOI:10.1016/j.gloplacha.2021.103591
- 发表时间:2021-09-14
- 期刊:
- 影响因子:3.9
- 作者:Cui, Huan;Kitajima, Kouki;Valley, John W.
- 通讯作者:Valley, John W.
A diverse Ediacara assemblage survived under low-oxygen conditions.
- DOI:10.1038/s41467-022-35012-y
- 发表时间:2022-11-27
- 期刊:
- 影响因子:16.6
- 作者:Cherry, Lucas B.;Gilleaudeau, Geoffrey J.;Grazhdankin, Dmitriy, V;Romaniello, Stephen J.;Martin, Aaron J.;Kaufman, Alan J.
- 通讯作者:Kaufman, Alan J.
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Alan Kaufman其他文献
Data and algorithms for genomic physical mapping
- DOI:
- 发表时间:
1994 - 期刊:
- 影响因子:0
- 作者:
Alan Kaufman - 通讯作者:
Alan Kaufman
Poster 74: A Multisite Patient Perception Study of Olopatadine 0.2% Compared To Epinastine 0.05% in Patients With Allergic Conjunctivitis
- DOI:
10.1016/j.optm.2008.04.081 - 发表时间:
2008-06-01 - 期刊:
- 影响因子:
- 作者:
Peter Van Hoven;Bradley E. Chipps;Richard Gower;Alan Kaufman; PACE trial investigators - 通讯作者:
PACE trial investigators
Piloting the adaptation of the Kaufman Assessment Battery for Children—2nd edition (KABC-II) to assess school-age neurodevelopment in rural Zimbabwe
试点采用考夫曼儿童评估套组——第二版(KABC-II)来评估津巴布韦农村地区学龄神经发育
- DOI:
- 发表时间:
2024 - 期刊:
- 影响因子:0
- 作者:
Joseph D. Piper;C. Mazhanga;G. Mapako;I. Mapurisa;T. Mashedze;E. Munyama;M. Mwapaura;D. Chidhanguro;Grace Gerema;N. Tavengwa;R. Ntozini;Lisa F. Langhaug;M. Smuk;Tamsen Rochat;Alan Kaufman;Nadeen Kaufman;Melissa Gladstone;Elizabeth Allen;Andrew J. Prendergast - 通讯作者:
Andrew J. Prendergast
Alan Kaufman的其他文献
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{{ truncateString('Alan Kaufman', 18)}}的其他基金
Acquisition of instrumentation for biogeochemical research at the University of Maryland
购置马里兰大学生物地球化学研究仪器
- 批准号:
0842268 - 财政年份:2009
- 资助金额:
$ 30.17万 - 项目类别:
Standard Grant
Collaborative Research: Stratigraphic, geochemical, and paleobiological tests of the co-evolution of multicellular life and environment in the late Ediacaran Period
合作研究:埃迪卡拉纪晚期多细胞生命与环境共同进化的地层学、地球化学和古生物学测试
- 批准号:
0844270 - 财政年份:2009
- 资助金额:
$ 30.17万 - 项目类别:
Continuing Grant
COLLABORATIVE RESEARCH: Investigating Early Triassic Ocean Chemistry, Stratigraphy, and Paleobiology During the Protracted Biotic Recovery from the Permo-Triassic Mass Extinction
合作研究:在二叠纪-三叠纪大规模灭绝的长期生物恢复过程中调查早期三叠世海洋化学、地层学和古生物学
- 批准号:
0446580 - 财政年份:2005
- 资助金额:
$ 30.17万 - 项目类别:
Standard Grant
COLLABORATIVE RESEARCH: Presaging Paleoproterozoic Global Change: Geobiology of the Late Archean Eon
合作研究:预测古元古代全球变化:太古代晚期的地球生物学
- 批准号:
0418005 - 财政年份:2004
- 资助金额:
$ 30.17万 - 项目类别:
Standard Grant
The Biogeochemical Aftermath of Neoproterozoic Ice Ages
新元古代冰河时代的生物地球化学后果
- 批准号:
0126378 - 财政年份:2002
- 资助金额:
$ 30.17万 - 项目类别:
Standard Grant
Acquisition of a Gas Source Stable Isotope Mass Spectrometer and Automated Preparation Systems
购置气源稳定同位素质谱仪和自动制备系统
- 批准号:
9817348 - 财政年份:1999
- 资助金额:
$ 30.17万 - 项目类别:
Standard Grant
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