SPATIOTEMPORAL DYNAMICS OF METHANE TRANSPORT ACROSS MULTIPLE PHASES IN HANGZHOU BAY COASTAL WETLANDS, CHINA

. As a crucial economic hub and ecologically sensitive region along China ’ s eastern coastline, Hangzhou Bay significantly influences regional carbon cycling and climate change through its wetland methane (CH 4 ) emissions. Our comprehensive study (2019-2024) based on static chamber methods and field measurements, revealed that CH 4 transport processes in these wetlands exhibit marked spatial heterogeneity and seasonal variation, with an annual mean flux ranging from 12.4 ± 6.1 to 13.9 ± 6.3 mg.m⁻².h⁻¹ . Vegetation-specific measurements showed that Spartina alterniflora communities emitted the highest CH 4 levels (18.1 ± 7.2 mg.m⁻².h⁻¹ ), followed by Phragmites australis stands (14.3 ± 5.5 mg.m⁻².h⁻¹ ), while bare mudflats demonstrated minimal emissions (3.4 ± 1.8 mg.m⁻².h⁻¹ ), with distinct seasonal patterns (summer > autumn > spring > winter). Our integrated analysis of transport mechanisms, environmental controls, microbial communities, and anthropogenic influences identified plant-mediated transport as the dominant pathway (63.2%), with ebullition (35.4%) and diffusion playing secondary roles. Notably, coastal reclamation has progressively shifted emission hotspots toward the bay mouth, while water temperature (R² = 0.63), soil organic carbon content (R² = 0.52), and vegetation biomass (R² = 0.47) were established as the primary drivers of CH 4 dynamics. These findings provide essential scientific foundations for wetland carbon management in the Yangtze River Delta, while offering valuable regional insights for global assessments of coastal wetland CH 4 emissions.

• Publication year

  2026

• Venue

  Applied Ecology and Environmental Research

• Publication date

  Unknown publication date

• Fields of study

  Not labeled

• Identifiers
  DOI 10.15666/aeer/2401_12231241
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

• Impact of Water Pollution on Waterborne Infections: Emphasizing Microbial Contamination and Associated Health Hazards in Humans

  2025cited by this paper
• Glacial Methane Hydrate Dissociation in the South China Sea Margin During the Oligocene

  2025cited by this paper
• Influence of Interaction Strength on Adsorption and Transport Properties of Nanoconfined Gas

  2025cited by this paper
• Spatio-temporal patterns and spillover effects of synergy on carbon dioxide emission and pollution reductions in the Yangtze River Delta region in China

  2024cited by this paper
• Wetland hydrological dynamics and methane emissions

  2024cited by this paper
• Wetland emission and atmospheric sink changes explain methane growth in 2020.

  2022cited by this paper
• Simulation of gas production from hydrate reservoirs (AT1) of Eastern Nankai Trough Japan

  2020cited by this paper
• Estimating global natural wetland methane emissions using process modelling: spatio-temporal patterns and contributions to atmospheric methane fluctuations

  2015cited by this paper
• Imaging a hydrate-related cold vent offshore Vancouver Island from deep-towed multichannel seismic data

  2009cited by this paper

• No citing papers are available for this paper.