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| http://dx.doi.org/10.1073/pnas.1709070114 | DOI Listing |
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Repeated pulses of volcanism drove the end-Permian terrestrial crisis in northwest China.
Nat Commun
September 2024
School of Earth and Environment, University of Leeds, Leeds, UK.
The Permo-Triassic mass extinction was linked to catastrophic environmental changes and large igneous province (LIP) volcanism. In addition to the widespread marine losses, the Permo-Triassic event was the most severe terrestrial ecological crisis in Earth's history and the only known mass extinction among insects, but the cause of extinction on land remains unclear. In this study, high-resolution Hg concentration records and multiple-archive S-isotope analyses of sediments from the Junggar Basin (China) provide evidence of repeated pulses of volcanic-S (acid rain) and increased Hg loading culminating in a crisis of terrestrial biota in the Junggar Basin coeval with the interval of LIP emplacement.
View Article and Find Full Text PDFWildfire effects on mercury fate in soils of North-Western Siberia.
Sci Total Environ
November 2024
Department of Soil Science of Temperate Ecosystems, Department of Agricultural Soil Science, University of Gottingen, 37077, Gottingen, Germany; Peoples Friendship University of Russia (RUDN University), 117198 Moscow, Russia. Electronic address:
Arctic soils store 49 Gg mercury (Hg) - an extremely toxic heavy metal, whereas soil Hg can be released to the atmosphere by wildfires. For the first time we investigated the effects of wildfires on the fate of soil Hg in North-Western (NW) Siberia based on GIS maps of areas burned during the last 38 years and a field paired comparison of unburned and burned areas in tundra (mosses, lichens, some grasses, and shrubs) and forest-tundra (multi-layered canopy of larch trees, shrubs, mosses, and lichens). These field surveys were deepened by soil controlled burning to assess the Hg losses from organic horizon and mineral soil.
View Article and Find Full Text PDFOceanic Anoxic Event 2 triggered by Kerguelen volcanism.
Nat Commun
June 2024
British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK.
Large Igneous Provinces (LIPs) are associated with global warming and carbon cycle perturbations during Oceanic Anoxic Event 2 (OAE2, ~94 Ma) and the Mid-Cenomanian Event (MCE, ~96.5 Ma). However, there is still no consensus on the role volcanism played as a trigger, or its source - previously ascribed to the Caribbean LIP or High Arctic LIP.
View Article and Find Full Text PDFClimate-forced Hg-remobilization associated with fern mutagenesis in the aftermath of the end-Triassic extinction.
Nat Commun
April 2024
Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Princetonlaan 8, 3584, CB, Utrecht, The Netherlands.
The long-term effects of the Central Atlantic Magmatic Province, a large igneous province connected to the end-Triassic mass-extinction (201.5 Ma), remain largely elusive. Here, we document the persistence of volcanic-induced mercury (Hg) pollution and its effects on the biosphere for ~1.
View Article and Find Full Text PDFSubaerial volcanism broke mid-Proterozoic environmental stasis.
Sci Adv
March 2024
Key Laboratory of Petroleum Geochemistry, Research Institute of Petroleum Exploration and Development, China National Petroleum Corporation, Beijing 100083, China.
The mid-Proterozoic, spanning 1.8 to 0.8 billion years ago, is recognized as a phase of marine anoxia, low marine primary productivity (MPP), and constrained eukaryotic biodiversity.
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