Photic Zone Euxinia During the Permian-Triassic Superanoxic Event

Grice, Kliti; Cao, Changqun; Love, Gordon D.; Böttcher, Michael E.; Twitchett, Richard J.; Grosjean, Emmanuelle; Summons, Roger E.; Turgeon, Steven; Dunning, William; Yugan, Jin

doi:10.1126/science.1104323

Cited by 747 publications

(484 citation statements)

References 25 publications

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“…Organisms were now obligated to change to carbon-based substrates as an energy source. On occasion, ambient concentrations of O 2 and hydrogen sulfide (H 2 S) were again reversed and while this euxinic environment produced mass extinctions (51), it likely ensured the survival of organisms whose genome had not only retained, but also passed on the capacity for sulfide metabolism. Remnants of this early life are present these days, even in modern aerobic eukaryotes, as sulfide is still preferred compared with carbon-based substrates in the electron transport chain [11,reviewed in Olson (121)].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen sulfide as an oxygen sensor

Olson

2013

Clinical Chemistry and Laboratory Medicine

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Significance: Although oxygen (O 2 )-sensing cells and tissues have been known for decades, the identity of the O 2 -sensing mechanism has remained elusive. Evidence is accumulating that O 2 -dependent metabolism of hydrogen sulfide (H 2 S) is this enigmatic O 2 sensor. Recent Advances: The elucidation of biochemical pathways involved in H 2 S synthesis and metabolism have shown that reciprocal H 2 S/O 2 interactions have been inexorably linked throughout eukaryotic evolution; there are multiple foci by which O 2 controls H 2 S inactivation, and the effects of H 2 S on downstream signaling events are consistent with those activated by hypoxia. H 2 S-mediated O 2 sensing has been demonstrated in a variety of O 2 -sensing tissues in vertebrate cardiovascular and respiratory systems, including smooth muscle in systemic and respiratory blood vessels and airways, carotid body, adrenal medulla, and other peripheral as well as central chemoreceptors. Critical Issues: Information is now needed on the intracellular location and stoichometry of these signaling processes and how and which downstream effectors are activated by H 2 S and its metabolites. Future Directions: Development of specific inhibitors of H 2 S metabolism and effector activation as well as cellular organelle-targeted compounds that release H 2 S in a timeor environmentally controlled way will not only enhance our understanding of this signaling process but also provide direction for future therapeutic applications. Antioxid. Redox Signal. 22, 377-397.

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Section: Introductionmentioning

confidence: 99%

Hydrogen sulfide as an oxygen sensor

Olson

2013

Clinical Chemistry and Laboratory Medicine

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“…Maleimides have also been detected in environmental samples, where they have been used as indicators of algal productivity, water column properties (i.e. redox conditions, stratification, chemocline depth) and depositional conditions [19,20,[26][27][28][29][30][31][32][33][34][35]. However, the precursors of many maleimides have still not been fully identified, the processes leading to their formation are incompletely understood and their environmental significance needs further investigation [29].…”

Section: Introductionmentioning

confidence: 99%

A new method for the rapid analysis of 1H-Pyrrole-2,5-diones (maleimides) in environmental samples by two-dimensional gas chromatography time-of-flight mass spectrometry

Naeher

Lengger

Grice

2016

Journal of Chromatography A

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. A new method for the rapid analysis of 1H-Pyrrole-2,5-diones (maleimides) in environmental samples by two-dimensional gas chromatography time-of-flight mass spectrometry. Journal of Chromatography A, 1435, 125-135 University of Bristol -Explore Bristol Research General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…During the last decade, the latest Permian and pre-Lopingian mass extinctions have become two of the most extensively studied subjects (e.g. Wignall and Hallam, 1992;Wignall and Twitchett, 1996;Bowring et al, 1998;Jin et al, 2000a;Shen and Shi, 2002;Lehrmann et al, 2003;Mundil et al, 2004;Twitchett et al, 2004;Grice et al, 2005;Isozaki et al, 2007a;Yin et al, 2007;Cao et al, 2009;Chen et al, 2009a;Wignall et al, 2009a). Debate has centred on whether there is a longlived inter-related event between the latest Changhsingian extinction and the pre-Lopingian crisis (Isozaki et al, 2007b;Yin et al, 2007;Bottjer et al, 2008) or two distinct extinctions including a short catastrophic latest Changhsingian extinction (Jin et al, 2000a;Rampino et al, 2000;Becker et al, 2001) unrelated to the end-Guadalupian extinction Shi, 1996, 2002;Shi et al, 1999;Wang and Sugiyama, 2000).…”

Section: Introductionmentioning

confidence: 99%

High‐resolution Lopingian (Late Permian) timescale of South China

et al. 2010

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The Lopingian represents the last epoch of the Palaeozoic Era and is bracketed by two severe biotic mass extinctions associated with dramatic environmental changes. The Lopingian Epoch lasted about 7 millions years and was also bracketed by large volcanic eruptions with the Emeishan volcanics at the base and the Siberian traps at the top. Considerable data have accumulated recently and in this paper we attempt to summarize these findings in a high-resolution Lopingian (Late Permian) timescale that integrates currently available multiple biostratigraphic, isotope chemostratigraphic, geochronologic and magnetostratigraphic data. In South China at least 13 conodont zones, multiple polarity zones and large carbon isotope fluctuations in the Lopingian are recognized and provide the high-resolution calibration that is essential to study this Late Permian interval characterized by Earth's largest biotic extinction. We also present a global correlation chart for the marine Lopingian Series.

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Photic Zone Euxinia During the Permian-Triassic Superanoxic Event

Cited by 747 publications

References 25 publications

Hydrogen sulfide as an oxygen sensor

Hydrogen sulfide as an oxygen sensor

A new method for the rapid analysis of 1H-Pyrrole-2,5-diones (maleimides) in environmental samples by two-dimensional gas chromatography time-of-flight mass spectrometry

High‐resolution Lopingian (Late Permian) timescale of South China

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