High Methane Production and Emission From Tropical Seagrasses Through Methylotrophic Methanogenesis DOI Creative Commons
Guiyuan Dai, Xiaogang Chen, Guangchao Zhuang

et al.

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(5)

Published: Feb. 28, 2025

Abstract Methane (CH 4 ) is a potent greenhouse gas that reduces the carbon sequestration capacity of seagrass meadows. However, our understanding CH production and emission from these important sinks limited. Here we conducted biogeochemical experiments to identify methylotrophic methanogenesis as primary pathway in tropical meadow. The rate constant was 2.2–3.9 d −1 , significantly higher than those temperate meadows (<0.02 ). meadow 835 ± 124 μmol m −2 . A global meta‐analysis further revealed approximately 8 times Global emit 0.3 Tg yr with over 90% resulting an 8.6% reduction burial on 20‐year time horizon. These findings highlight role sources, which can offset benefits sequestration.

Language: Английский

The climate benefit of seagrass blue carbon is reduced by methane fluxes and enhanced by nitrous oxide fluxes DOI Creative Commons
Bradley D. Eyre, Nicola Camillini, Ronnie N. Glud

et al.

Communications Earth & Environment, Journal Year: 2023, Volume and Issue: 4(1)

Published: Oct. 13, 2023

Abstract Blue carbon is stored long-term in vegetated coastal ecosystems, which constitutes an important sink for atmospheric dioxide (CO 2 ). However, because methane (CH 4 ) and nitrous oxide (N O) have higher global warming potentials (GWP) than CO , their production release during organic matter diagenesis can affect the climate benefit of blue carbon. Here, we present a meta-analysis synthesizing seagrass CH N O fluxes burial rates, use these data to estimate reduced (offsets) using three upscaling approaches. Mean offsets individual species (34.7% GWP 20 ;1.0% 100 globally (33.4% ;7.0% were similar, but higher, lower globally, Australian region (41.3% ;1.1% This study highlights importance rates accounting both future assessments.

Language: Английский

Citations

12
Methylotrophy in the Mire: direct and indirect routes for methane production in thawing permafrost DOI Creative Commons
Jared B. Ellenbogen, Mikayla Borton, Bridget McGivern

et al.

mSystems, Journal Year: 2023, Volume and Issue: 9(1)

Published: Dec. 8, 2023

While wetlands are major sources of biogenic methane (CH

Language: Английский

Citations

12
Influence of Nitrogen Bioavailability on the Anaerobic Co-Digestion of the Aegagropiles of the Seagrass Posidonia oceanica with Different Nitrogen-Rich Substrates: Process Performance and Kinetic Analysis DOI Creative Commons
D. de la Lama-Calvente, Juan Manuel Mancilla-Leytón,

Iván Garrido-Murillo

et al.

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(6), P. 2880 - 2880

Published: March 7, 2025

The shedding of leaves by Posidonia oceanica (P. oceanica) in autumn results the accumulation shoreline debris, contributing to significant economic, social, and environmental problems. Due lack alternative solutions, this waste biomass is disposed landfills, incurring an economic cost for disposal process. In context circular economy, anaerobic digestion (AD) can serve as a highly efficient biological treating valorizing wastes with high organic load. aim research was comparatively evaluate performance kinetics AD ashore P. its co-digestion (co-AD) different nitrogen-rich co-substrates. To effect nitrogen source co-AD system, peptone, casein, synthetic urea, microalgae Raphidocelis subcapitata were used co-substrates biomethanization tests at mesophilic temperature (35 ± 2 °C). lowest methane yield achieved sole (79 3 NL CH4 kg−1 VS), while highest yields found three co-ADs proteins (i.e., casein), showing no differences among them (380 30 − 420 VS). Additionally, first-order transference function model proven allowed adequately fitting experimental production time.

Language: Английский

Citations

0
Uncovering dynamic transcriptional regulation of methanogenesis via single-cell imaging of archaeal gene expression DOI Creative Commons
Yijing Dong, Qi Li,

Fei Zhao

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: March 6, 2025

Archaeal methanogenesis is a dynamic process regulated by various cellular and environmental signals. However, understanding this regulation technically challenging due to the difficulty of measuring gene expression dynamics in individual archaeal cells. Here, we develop multi-round hybridization chain reaction (HCR)-assisted single-molecule fluorescence situ (FISH) method quantify transcriptional 12 genes involved cells Methanococcoides orientis. Under optimal growth condition, most these appear be expressed temporal order matching metabolic order. Interestingly, an important factor, Fe(III), stimulates methane production without upregulating methanogenic expression, likely through Fenton-reaction-triggered mechanism. Through single-cell clustering kinetic analyses, associate patterns mixture distinct states, potentially set shared factors. Our work provides quantitative framework for uncovering mechanisms archaea. Understanding Dong et al. multiple single archaeon.

Language: Английский

Citations

0
High Methane Production and Emission From Tropical Seagrasses Through Methylotrophic Methanogenesis DOI Creative Commons
Guiyuan Dai, Xiaogang Chen, Guangchao Zhuang

et al.

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(5)

Published: Feb. 28, 2025

Abstract Methane (CH 4 ) is a potent greenhouse gas that reduces the carbon sequestration capacity of seagrass meadows. However, our understanding CH production and emission from these important sinks limited. Here we conducted biogeochemical experiments to identify methylotrophic methanogenesis as primary pathway in tropical meadow. The rate constant was 2.2–3.9 d −1 , significantly higher than those temperate meadows (<0.02 ). meadow 835 ± 124 μmol m −2 . A global meta‐analysis further revealed approximately 8 times Global emit 0.3 Tg yr with over 90% resulting an 8.6% reduction burial on 20‐year time horizon. These findings highlight role sources, which can offset benefits sequestration.

Language: Английский

Citations

0