Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1916738117 |
Ediacaran reorganization of the marine phosphorus cycle | |
Laakso, Thomas A.1; Sperling, Erik A.2; Johnston, David T.1; Knoll, Andrew H.3 | |
2020-05-18 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:22页码:11961-11967 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The Ediacaran Period (635 to 541 Ma) marks the global transition to a more productive biosphere, evidenced by increased availability of food and oxidants, the appearance of macroscopic animals, significant populations of eukaryotic phytoplankton, and the onset of massive phosphorite deposition. We propose this entire suite of changes results from an increase in the size of the deep-water marine phosphorus reservoir, associated with rising sulfate concentrations and increased remineralization of organic P by sulfate-reducing bacteria. Simple mass balance calculations, constrained by modern anoxic basins, suggest that deep-water phosphate concentrations may have increased by an order of magnitude without any increase in the rate of P input from the continents. Strikingly, despite a major shift in phosphorite deposition, a new compilation of the phosphorus content of Neoproterozoic and early Paleozoic shows little secular change in median values, supporting the view that changes in remineralization and not erosional P fluxes were the principal drivers of observed shifts in phosphorite accumulation. The trigger for these changes may have been transient Neoproterozoic weathering events whose biogeochemical consequences were sustained by a set of positive feedbacks, mediated by the oxygen and sulfur cycles, that led to permanent state change in biogeochemical cycling, primary production, and biological diversity by the end of the Ediacaran Period. |
英文关键词 | Ediacaran biosphere sulfate phopshorus phosphorite |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000538147800022 |
WOS关键词 | DOUSHANTUO FORMATION ; ATMOSPHERIC OXYGEN ; ANIMAL EVOLUTION ; RISE ; IRON ; PHOSPHOGENESIS ; SEA ; BIOTURBATION ; SURFACE ; GROWTH |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/267668 |
专题 | 地球科学 |
作者单位 | 1.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA; 2.Stanford Univ, Dept Geol Sci, Stanford, CA 94305 USA; 3.Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 20138 USA |
推荐引用方式 GB/T 7714 | Laakso, Thomas A.,Sperling, Erik A.,Johnston, David T.,et al. Ediacaran reorganization of the marine phosphorus cycle[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(22):11961-11967. |
APA | Laakso, Thomas A.,Sperling, Erik A.,Johnston, David T.,&Knoll, Andrew H..(2020).Ediacaran reorganization of the marine phosphorus cycle.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(22),11961-11967. |
MLA | Laakso, Thomas A.,et al."Ediacaran reorganization of the marine phosphorus cycle".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.22(2020):11961-11967. |
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