Climate-forced Hg-remobilization driving mutagenesis in ferns in the aftermath of the end-Triassic extinction DOI Creative Commons
Remco Bos, Wang Zheng, Sofie Lindström

et al.

Research Square (Research Square), Journal Year: 2023, Volume and Issue: unknown

Published: Oct. 16, 2023

Abstract The long-term effects of the Central Atlantic Magmatic Province (CAMP), a large igneous province connected to end-Triassic mass-extinction (201.5 Ma), remain largely elusive. Here, we document persistence volcanic-induced mercury pollution and its on biosphere for 2 million years after extinction event. In sediments recovered in Germany (Schandelah-1 core), record not only high abundances malformed fern spores at Triassic-Jurassic boundary, but also during Hettangian, indicating repeated vegetation disturbance environmental stress that was eccentricity forced. Crucially, these correspond spikes sedimentary Hg concentrations. Hg-isotope ratios (δ202Hg, Δ199Hg) indicate volcanic source boundary terrestrial early Jurassic peaks. We conclude injected by CAMP across repeatedly remobilized from coastal wetlands hinterland areas eccentricity-forced phases severe hydrological upheaval erosion, focusing Hg-pollution shallow marine basins.

Language: Английский

Repeated pulses of volcanism drove the end-Permian terrestrial crisis in northwest China DOI Creative Commons
Jacopo Dal Corso, Robert J. Newton, Aubrey L. Zerkle

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Sept. 2, 2024

The Permo-Triassic mass extinction was linked to catastrophic environmental changes and large igneous province (LIP) volcanism. In addition the widespread marine losses, Permo–Triassic event most severe terrestrial ecological crisis in Earth's history only known among insects, but cause of on land remains unclear. this study, high-resolution Hg concentration records multiple-archive S-isotope analyses sediments from Junggar Basin (China) provide evidence repeated pulses volcanic-S (acid rain) increased loading culminating a biota coeval with interval LIP emplacement. Minor are, however, inconsistent total ozone layer collapse. Our data suggest that volcanism repeatedly stressed end-Permian environments ~300 kyr preceding locally via S-driven acidification deposition Hg, globally pulsed CO2. geochemistry across Permian–Triassic (252 Ma) provides volcanic eruptions over drove poisoning palaeo-lacustrine ecosystem northwest China.

Language: Английский

Citations

2
Cycles of ∼32.5 My and ∼26.2 My in correlated episodes of continental flood basalts (CFBs), hyper-thermal climate pulses, anoxic oceans, and mass extinctions over the last 260 My: Connections between geological and astronomical cycles DOI
Michael R. Rampino,

K. Caldeira,

Sedelia Rodriguez

et al.

Earth-Science Reviews, Journal Year: 2023, Volume and Issue: 246, P. 104548 - 104548

Published: Sept. 25, 2023

Language: Английский

Citations

6
Stepwise deforestation during the Permian-Triassic boundary crisis linked to rising temperatures DOI

Jiaqi Wu,

Daoliang Chu, Genming Luo

et al.

Earth and Planetary Science Letters, Journal Year: 2023, Volume and Issue: 620, P. 118350 - 118350

Published: Aug. 22, 2023

Language: Английский

Citations

4
Volcanogenic mercury and plant mutagenesis during the end-Permian mass extinction: Palaeoecological perturbation in northern Pangaea DOI
Niall W. Paterson, Valentina Marzia Rossi, Elke Schneebeli‐Hermann

et al.

Gondwana Research, Journal Year: 2024, Volume and Issue: 134, P. 123 - 143

Published: July 9, 2024

Language: Английский

Citations

1
Marine biological responses to abrupt climate change in deep time DOI Creative Commons
Wolfgang Kiessling, Carl J. Reddin, Elizabeth M. Dowding

et al.

Paleobiology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 15

Published: Dec. 11, 2024

Abstract Ancient changes in the biosphere, from organismic traits to wholesale ecosystem changes, can be aligned with climate forcing across Phanerozoic. Clear examples of abrupt warming causing biodiversity crises are primarily found between Permian and Paleogene periods. During these times, catastrophic events occurred, resembling extreme scenarios projected for near future. The paleobiologic literature around generally supports hypothesis that change was a dominant trigger extinction and/or ecological crisis. When history considered, virtually all post-Paleozoic global biotic confidently attributed climatic change, (hyperthermal events) leaving most consistent fingerprint. combined stress deoxygenation sufficient explain marine patterns hyperthermal events. Although ocean acidification may have contributed, direct role pH on toll organisms is not consistently demonstrated. Future research enhance correspondence magnitudes their biological impacts, even though observed rates cannot currently compared different timescales. Mimicking multi-scale approaches modern ecology, paleontological impact will benefit specifically targeting scaling relationships.

Language: Английский

Citations

1
Uncovering a phylogenetic signal in plant biopolymer chemistry: a comparison of sporopollenin isolation approaches for use in palynological research DOI Creative Commons
Phillip E. Jardine, Matthew Kent, Wesley T. Fraser

et al.

Palaeontology, Journal Year: 2023, Volume and Issue: 66(6)

Published: Nov. 1, 2023

Abstract Sporomorphs (pollen and spores) are a mainstay of research into past vegetation, increasingly sporomorph chemistry is being used as palaeoecological tool. To make extant sporomorphs directly comparable to fossil specimens, fresh material processed remove labile compounds isolate the sporopollenin wall. A range processing approaches currently in use, but chemistries produced by these different techniques have not yet been compared across taxa. It therefore clear how they compare terms efficiently isolating without changing its chemical structure, what impact on relative similarities differences among taxa (i.e. whether more closely related species will always appear chemically similar, regardless processed). Here, we test this applying five from 15 vascular plant phylogeny. We show that each approach has own idiosyncrasies impacts chemistry. For most part common pattern among‐taxon variability uncovered, phylogenetic signal within supported. Working with spectral derivatives generally increases agreement approaches, decreases strength signal. No one ideal, choice which use likely depend goal study, type quantity processed, laboratory facilities available for processing.

Language: Английский

Citations

3
Fluorescence lifetime imaging of sporopollenin: An alternative way to improve taxonomic level of identifying dispersed pollen and spores DOI
Zhenzhen Hu, Xinlei Jia, Xiao Chen

et al.

Review of Palaeobotany and Palynology, Journal Year: 2023, Volume and Issue: 316, P. 104946 - 104946

Published: July 7, 2023

Language: Английский

Citations

1
The use of micro infrared spectroscopy in reconstructing past ecological and environmental change DOI
William D. Gosling, Crystal N. H. McMichael

Elsevier eBooks, Journal Year: 2023, Volume and Issue: unknown, P. 478 - 487

Published: July 27, 2023

Language: Английский

Citations

1
Comment on “Dying in the Sun: Direct evidence for elevated UV-B radiation at the end-Permian mass extinction” DOI Creative Commons
Alistair W. R. Seddon, Boris Zimmermann

Science Advances, Journal Year: 2023, Volume and Issue: 9(34)

Published: Aug. 25, 2023

Liu et al. present evidence of increased abundance UV-B-absorbing compounds in fossilized sporomorphs at the end-Permian mass extinction based on Fourier transform infrared (FTIR) spectroscopy. Their approach assumes that are spanning interval and they can be quantified using FTIR. However, further analysis reveals signal aim to focus is weak poorly resolved against nonrandom background interference most likely associated with water vapor. We also show peak detection methods use inappropriate for these fossil because their select only 3.9% spectra target waveband interest. The reconstruction baseline variations cannot confidently attributed compounds. "Direct" UV-B radiation claimed have been observed this record.

Language: Английский

Citations

1
Spatiotemporal disparity of volcanogenic mercury records in the southwestern Neo-Tethys Ocean during the Permian–Triassic transition DOI
Jianbo Chen,

Yan-ling Zhou,

W. T. Liu

et al.

Global and Planetary Change, Journal Year: 2024, Volume and Issue: 240, P. 104534 - 104534

Published: July 29, 2024

Language: Английский

Citations

0