Cyanobacterial fossils from 252 Ma old microbialites and their environmental significance

Ya Sheng Wu; Gong Liang Yu; Ren Hui Li; Li Rong Song; Hong Xia Jiang; Robert Riding; Li Jing Liu; Dong Yan Liu; Rui Zhao

doi:10.1038/srep03820

Cyanobacterial fossils from 252 Ma old microbialites and their environmental significance

Ya Sheng Wu, Gong Liang Yu, Ren Hui Li, Li Rong Song, Hong Xia Jiang, Robert Riding, Li Jing Liu, Dong Yan Liu, Rui Zhao

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47 Scopus citations

Abstract

The end-Permian mass extinction was followed by the formation of an enigmatic rock layer with a distinctive macroscopic spotted or dendroid fabric. This deposit has been interpreted as microbial reef rock, digitate dendrolite, digital thrombolite, dendritic thrombolite, or bacterial deposits. Agreement has been reached in considering them as microbialites, but not in their formation. This study has revealed that the spotted and dendroid microbialites were composed of numerous fossil casts formed by the planktic cyanobacterium, Microcystis, a coccoid genus that at the present-day commonly forms blooms in modern lakes, rivers, and reservoirs. The abundance of the fossils and the diagenesis they experienced has determined the macroscopic fabric: where they abundant, the rock appears as dendroid, otherwise, it appears as spotted. The ancient Microcystis bloom might produce toxin to kill other metazoans, and be responsible for the oceanic anoxia that has puzzled so many researchers for so many years.

Original language	English
Article number	3820
Journal	Scientific Reports
Volume	4
DOIs	https://doi.org/10.1038/srep03820
State	Published - 22 Jan 2014
Externally published	Yes

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title = "Cyanobacterial fossils from 252 Ma old microbialites and their environmental significance",

abstract = "The end-Permian mass extinction was followed by the formation of an enigmatic rock layer with a distinctive macroscopic spotted or dendroid fabric. This deposit has been interpreted as microbial reef rock, digitate dendrolite, digital thrombolite, dendritic thrombolite, or bacterial deposits. Agreement has been reached in considering them as microbialites, but not in their formation. This study has revealed that the spotted and dendroid microbialites were composed of numerous fossil casts formed by the planktic cyanobacterium, Microcystis, a coccoid genus that at the present-day commonly forms blooms in modern lakes, rivers, and reservoirs. The abundance of the fossils and the diagenesis they experienced has determined the macroscopic fabric: where they abundant, the rock appears as dendroid, otherwise, it appears as spotted. The ancient Microcystis bloom might produce toxin to kill other metazoans, and be responsible for the oceanic anoxia that has puzzled so many researchers for so many years.",

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T1 - Cyanobacterial fossils from 252 Ma old microbialites and their environmental significance

AU - Wu, Ya Sheng

AU - Yu, Gong Liang

AU - Li, Ren Hui

AU - Song, Li Rong

AU - Jiang, Hong Xia

AU - Riding, Robert

AU - Liu, Li Jing

AU - Liu, Dong Yan

AU - Zhao, Rui

PY - 2014/1/22

Y1 - 2014/1/22

N2 - The end-Permian mass extinction was followed by the formation of an enigmatic rock layer with a distinctive macroscopic spotted or dendroid fabric. This deposit has been interpreted as microbial reef rock, digitate dendrolite, digital thrombolite, dendritic thrombolite, or bacterial deposits. Agreement has been reached in considering them as microbialites, but not in their formation. This study has revealed that the spotted and dendroid microbialites were composed of numerous fossil casts formed by the planktic cyanobacterium, Microcystis, a coccoid genus that at the present-day commonly forms blooms in modern lakes, rivers, and reservoirs. The abundance of the fossils and the diagenesis they experienced has determined the macroscopic fabric: where they abundant, the rock appears as dendroid, otherwise, it appears as spotted. The ancient Microcystis bloom might produce toxin to kill other metazoans, and be responsible for the oceanic anoxia that has puzzled so many researchers for so many years.

AB - The end-Permian mass extinction was followed by the formation of an enigmatic rock layer with a distinctive macroscopic spotted or dendroid fabric. This deposit has been interpreted as microbial reef rock, digitate dendrolite, digital thrombolite, dendritic thrombolite, or bacterial deposits. Agreement has been reached in considering them as microbialites, but not in their formation. This study has revealed that the spotted and dendroid microbialites were composed of numerous fossil casts formed by the planktic cyanobacterium, Microcystis, a coccoid genus that at the present-day commonly forms blooms in modern lakes, rivers, and reservoirs. The abundance of the fossils and the diagenesis they experienced has determined the macroscopic fabric: where they abundant, the rock appears as dendroid, otherwise, it appears as spotted. The ancient Microcystis bloom might produce toxin to kill other metazoans, and be responsible for the oceanic anoxia that has puzzled so many researchers for so many years.

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Cyanobacterial fossils from 252 Ma old microbialites and their environmental significance

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