Effects of nitrogen addition on anaerobic oxidation of methane in Zoige Plateau peatlands

Liu, Junxia; Xue, Dan; Chen, Huai; Jian, Hu; Huang, Xinya; Liu, Jianliang; Chen, Xuhui; Liu, Liangfeng

doi:10.1016/j.ecolind.2021.108018

Cited by 4 publications

(4 citation statements)

References 45 publications

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“…The AMO has been recognized for its influence on various elements, including iron, manganese, arsenic, selenium, vanadium, and nitrogen, across diverse anoxic environments, such as submerged wetlands, flooded rice paddies, peatland soils, intertidal zones, and groundwater. − This study, for the first time, discerned the correlation between the AMO process and P mobilization within anoxic settings. Although the finding is derived from our study of aquifer systems, it is reasonable to infer that P mobilization facilitated by the Fe-AMO mechanism could be a ubiquitous process in other environments that are rich in OM and abundant in Fe.…”

Section: Environmental Indicationsmentioning

confidence: 85%

“…In natural ecosystems, the AMO process has been found to profoundly affect the biogeochemical dynamics of various elements, including iron, 31 manganese, 32 arsenic, 33 selenium, 34 vanadium, 28 and nitrogen. 35 However, the association between the AMO process and P mobilization in these systems remains largely unexplored, especially within P-rich groundwater systems. It is still uncertain whether the AMO process, when coupled with the reduction of FeOOH, can substantially contribute to P mobilization in groundwater, in addition to coupled processes involving crystalline FeOOH and recalcitrant OM.…”

Section: Introductionmentioning

confidence: 99%

“…Although several studies have found evidence for the occurrence of the AMO process in groundwater, − its influence on the fate of contaminants has not been extensively studied. In natural ecosystems, the AMO process has been found to profoundly affect the biogeochemical dynamics of various elements, including iron, manganese, arsenic, selenium, vanadium, and nitrogen . However, the association between the AMO process and P mobilization in these systems remains largely unexplored, especially within P-rich groundwater systems.…”

Section: Introductionmentioning

confidence: 99%

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Geogenic Phosphorus Enrichment in Groundwater due to Anaerobic Methane Oxidation-Coupled Fe(III) Oxide Reduction

Du,

Xiong,

Deng

et al. 2024

Environ. Sci. Technol.

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Accumulation of geogenic phosphorus (P) in groundwater is an emerging environmental concern, which is closely linked to coupled processes involving FeOOH and organic matter under methanogenic conditions. However, it remains unclear how P enrichment is associated with methane cycling, particularly the anaerobic methane oxidation (AMO). This study conducted a comprehensive investigation of carbon isotopes in dissolved inorganic carbon (DIC), CO2, and CH4, alongside Fe isotopes, microbial communities, and functions in quaternary aquifers of the central Yangtze River plain. The study found that P concentrations tended to increase with Fe(II) concentrations, δ56Fe, and δ13C-DIC, suggesting P accumulation due to the reductive dissolution of FeOOH under methanogenic conditions. The positive correlations of pmoA gene abundance versus δ13C–CH4 and Fe concentrations versus δ13C–CH4, and the prevalent presence of Candidatus_Methanoperedens, jointly demonstrated the potential significance of Fe(III)-mediated AMO process (Fe-AMO) alongside traditional methanogenesis. The increase of P concentration with δ13C–CH4 value, pmoA gene abundance, and Fe concentration suggested that the Fe-AMO process facilitated P enrichment in groundwater. Redundancy analysis confirmed this assertion, identifying P concentration as the primary determinant and the cooperative influence of Fe-AMO microorganisms such as Candidatus_Methanoperedens and Geobacter on P enrichment. Our work provided new insights into P dynamics in subsurface environments.

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Section: Environmental Indicationsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geogenic Phosphorus Enrichment in Groundwater due to Anaerobic Methane Oxidation-Coupled Fe(III) Oxide Reduction

Du,

Xiong,

Deng

et al. 2024

Environ. Sci. Technol.

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“…Anthropogenic activities, such as the fossil fuel combustion and fertilizer application, have caused substantial nitrogen (N) and phosphorus (P) enrichment in terrestrial and aquatic ecosystems (Li et al, 2016;Liu et al, 2021). The excessive input of N and P may greatly influence plant productivity and biodiversity, and cause serious environmental problems like soil acidification and water eutrophication (Conley et al, 2009;Chen et al, 2015;Storkey et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Soil bacteria are more sensitive than fungi in response to nitrogen and phosphorus enrichment

et al. 2022

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Anthropogenic activities have dramatically increased nitrogen (N) and phosphorous (P) enrichments in terrestrial ecosystems. However, it is still unclear on how bacterial and fungal communities would respond to the simultaneously increased N and P enrichment. In this study, we used a field experiment to simulate N and P input, and examined the effects of N and P additions on the abundance, alpha-diversity, and community composition of soil bacteria and fungi in a riparian forest. Six nutrient-addition treatments, including low N (30 kg N ha–1 year–1), high N (150 kg N ha –1 year–1), low P (30 kg P2O5 ha–1 year–1), high P (150 kg P2O5 ha –1 year–1), low N+P, high N+P, and a control (CK) treatment were set up. We found that the N and P additions significantly affected bacterial abundance, community composition, but not the alpha diversity. Specifically, 16S, nirK, and nirS gene copy numbers were significantly reduced after N and P additions, which were correlated with decreases in soil pH and NO-3-N, respectively; Co-additions of N and P showed significantly antagonistic interactions on bacterial gene copies; Nutrient additions significantly increased the relative abundance of Proteobacteria while reduced the relative abundance of Chloroflexi. Mantel’s test showed that the alteration in bacterial composition was associated with the changes in soil pH and NO-3-N. The nutrient additions did not show significant effects on fungal gene copy numbers, alpha diversity, and community composition, which could be due to non-significant alterations in soil C/N and total P concentration. In conclusion, our results suggest that soil bacteria are more sensitive than fungi in response to N and P enrichment; the alterations in soil pH and NO-3-N explain the effects of N and P enrichment on bacterial communities, respectively; and the co-addition of N and P reduces the negative effects of these two nutrients addition in alone. These findings improve our understanding of microbial response to N and P addition, especially in the context of simultaneous enrichment of anthropogenic nutrient inputs.

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Carbon fluxes of alpine peatlands were jointly affected by water table level changes and the duration

Yan,

Li,

Zhang

et al. 2023

J Soils Sediments

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Effects of nitrogen addition on anaerobic oxidation of methane in Zoige Plateau peatlands

Cited by 4 publications

References 45 publications

Geogenic Phosphorus Enrichment in Groundwater due to Anaerobic Methane Oxidation-Coupled Fe(III) Oxide Reduction

Geogenic Phosphorus Enrichment in Groundwater due to Anaerobic Methane Oxidation-Coupled Fe(III) Oxide Reduction

Soil bacteria are more sensitive than fungi in response to nitrogen and phosphorus enrichment

Carbon fluxes of alpine peatlands were jointly affected by water table level changes and the duration

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