Transformation of sulfur species in lake sediments at Ardley Island and Fildes Peninsula, King George Island, Antarctic Peninsula

Chen, Yuanqing; Song, Lili; Huang, Tao; Chu, Zhuding; Xie, Zhouqing

doi:10.1016/j.scitotenv.2019.135591

Cited by 26 publications

(22 citation statements)

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“…The observed large enrichment in δ 34 SSO4 and δ 18 OSO4 and high abundance of SRB in Y2 sediments in the 30, 41 and 52 cm layer indicated a strong sulfate reduction therein (Fig.7). This indication, however, is inconsistent with the strong sulfate reduction in 12-19 cm layer as indicated by high proportion of RIS/SO4 2in Chen et al (2020a). This inconsistency is likely due to that the sulfur and oxygen isotope compositions of sulfate were affected simultaneously by sulfate reduction, sulfur oxidation and remineralization of organic sulfur compounds, because sulfate reduction results large enrichment in δ 34 SSO4 and δ 18 OSO4 while sulfur oxidation and remineralization of organic sulfur compounds would deplete δ 34 SSO4 and δ 18 OSO4 in system.…”

Section: Sulfate Reduction and Sulfur Oxidationmentioning

confidence: 72%

“…Sub-sediments of Y2 and YO analyzed in the present study were parallel samples to those reported in Chen et al (2020a). Before chemical analyses and DNA extraction, one part of each subsample was stored at -20°C, and the other part was centrifugalized to extract the pore water prior to freeze-dried and powdered.…”

Section: Sample Pretreatmentmentioning

confidence: 99%

“…Other sulfur cycle-related microbial groups in YO include Pseudomonas (1.63%), Gallionella (0.64%) and Ferruginibacter (0.90%). Fig.4 Vertical distribution of sulfur species of AVS, CRS and sulfate (data from Chen et al, 2020a) and the corresponding δ 34 SAVS, δ 34 SCRS, δ 34 SSO4 and δ 18 OSO4 in Y2 and YO sediments.…”

Section: Compositions Of Microbial Communitymentioning

confidence: 99%

“…Sulfur is one of the important nutrient elements, and its biogeochemical transformation and recycling play an important role in maintaining the function of aquatic ecosystems (Orem et al 2015;Poulin et al 2017;Chen et al 2020a). For example, sulfur biogeochemistry is coupled closely with the remineralization of organic matter, acidification of water bodies, formation of biogenic pyrite and control of trace metal bioavailability in aquatic environment (Pester et al 2012;Sheng et al 2013; Van de Velde et al 2017;Liu et al 2017;Jørgensen et al 2019;Chen et al 2020b).…”

Section: Introductionmentioning

confidence: 99%

“…Vertical distribution of Shannon-Wiener index and the reported TOC, TP, TN and TS in Y2 and YO sediments(Chen et al 2020a). …”

mentioning

confidence: 99%

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Diverse Biotransformation of Sulfur in Antarctic Lake Sediments

Song

Huang

Chen

et al. 2021

Preprint

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Microbial communities, sulfur isotope of sulfides (δ34SAVS and δ34SCRS) and sulfur and oxygen isotopes of sulfate (δ34SSO4 and δ18OSO4) in sediments were analyzed to study the biotransformation of sulfur in a penguin-affected lake Y2 and a pristine YO from Fildes Peninsula, Antarctic Peninsula. The microbial communities in Y2 were mainly associated with penguin activities, while those in YO were limited by nutrients. The much enriched δ34SSO4 recorded at depth of 30, 41 and 52 cm in Y2 indicates very strong sulfate reduction therein. The sulfur-degrading bacteria Pseudomonas in 0–23 cm of Y2 was 3.5 times as abundant as that of sulfur oxidizing bacteria (SOB), indicating remarkable remineralization of organic sulfur. While abundant SOB and 34S-depleted sulfate indicate considerable sulfur oxidation in 34–56 cm layer in Y2. In YO sediments, the highest abundance of Desulfotalea and the most enriched δ34SSO4 (35.2‰) and δ34SCRS (2.5‰) indicate strongest sulfate reduction in 28 cm layer. High abundance of Pseudomonas indicates active remineralization of organic sulfur in 3–5 cm layer in YO. While the medium δ34SSO4 and considerable abundance of SOB and SRB indicate concurrence of sulfur oxidation and sulfate reduction in other layers in YO. Our results show that high level of organic matter inputs from penguin populations support the diverse microbial community and biotransformation of sulfur in freshwater ecosystems in Antarctica.

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Section: Sulfate Reduction and Sulfur Oxidationmentioning

confidence: 72%

Section: Sample Pretreatmentmentioning

confidence: 99%

Section: Compositions Of Microbial Communitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Vertical distribution of Shannon-Wiener index and the reported TOC, TP, TN and TS in Y2 and YO sediments(Chen et al 2020a). …”

mentioning

confidence: 99%

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Diverse Biotransformation of Sulfur in Antarctic Lake Sediments

Song

Huang

Chen

et al. 2021

Preprint

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Procedures from samples to sulfur isotopic data: A review

Zhao,

Guo,

Zhang

et al. 2024

Rapid Comm Mass Spectrometry

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RationaleSulfur isotopes have been widely used to solve some key scientific questions, especially in the last two decades with advanced instruments and analytical schemes. Different sulfur speciation and multiple isotopes analyzed in laboratories worldwide and in situ microanalysis have also been reported in many articles. However, methods of sampling to measurements are multifarious, and occasionally some inaccuracies are present in published papers. Vague methods may mislead newcomers to the field, puzzle readers, or lead to incorrect data‐based correlations.MethodsWe have reviewed multiple methods on sulfur isotopic analyses from the perspectives of sampling, laboratory work, and instrumental analysis in order to help reduce operational inhomogeneity and ensure the fidelity of sulfur isotopic data. We do not deem our proposed solutions as the ultimate standard methods but as a lead‐in to the overall introduction and summary of the current methods used.ResultsIt has been shown that external contamination and transformation of different sulfur species should be avoided during the sampling, pretreatment, storage, and chemical treatment processes. Conversion rates and sulfur isotopic fractionations during sulfur extraction, purification, and conversion processes must be verified by researchers using standard or known samples. The unification of absence of isotopic fractionation is needed during all steps, and long‐term monitoring of standard samples is recommended.ConclusionThis review compiles more details on different methods in sampling, laboratory operation, and measurement of sulfur isotopes, which is beneficial for researchers' better practice in laboratories. Microanalyses and molecular studies are the frontier techniques that compare the bulk sample with the elemental analysis/continuous flow–gas source stable isotope ratio mass spectrometry method, but the latter is widely used. The development of sulfur isotopic measurements will lead to the innovation in scientific issues with sulfur proxies.

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Introduction to the Significant Impact of AVS on Controlling the Metal Toxicity Regarding Sulfur Cycle

Zokm

2023

Earth and Environmental Sciences Library

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Transformation of sulfur species in lake sediments at Ardley Island and Fildes Peninsula, King George Island, Antarctic Peninsula

Cited by 26 publications

References 75 publications

Diverse Biotransformation of Sulfur in Antarctic Lake Sediments

Diverse Biotransformation of Sulfur in Antarctic Lake Sediments

Procedures from samples to sulfur isotopic data: A review

Introduction to the Significant Impact of AVS on Controlling the Metal Toxicity Regarding Sulfur Cycle

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