Methane flux dynamics in relation to methanogenic and methanotrophic populations in the soil of Indian Sundarban mangroves

2018 ◽  
Vol 39 (2) ◽  
pp. e12493 ◽  
Author(s):  
Subhajit Das ◽  
Dipnarayan Ganguly ◽  
Sabyasachi Chakraborty ◽  
Abhishek Mukherjee ◽  
Tarun Kumar De
Keyword(s):  
Methane Flux ◽  
Flux Dynamics ◽  
Indian Sundarban

Methane flux dynamics in a submerged aquatic vegetation zone in a subtropical lake

2019 ◽  
Vol 672 ◽  
pp. 400-409
Author(s):  
Mi Zhang ◽  
Qitao Xiao ◽  
Zhen Zhang ◽  
Yunqiu Gao ◽  
Jiayu Zhao ◽  
...  
Keyword(s):  
Submerged Aquatic Vegetation ◽  
Aquatic Vegetation ◽  
Methane Flux ◽  
Flux Dynamics ◽  
Vegetation Zone ◽  
Subtropical Lake

Methane flux dynamics during mire succession

Oecologia ◽  
2010 ◽  
Vol 165 (2) ◽  
pp. 489-499 ◽  
Author(s):  
Mirva Leppälä ◽  
Jari Oksanen ◽  
Eeva-Stiina Tuittila
Keyword(s):  
Methane Flux ◽  
Flux Dynamics

Methane flux dynamics in an Irish lowland blanket bog

2007 ◽  
Vol 299 (1-2) ◽  
pp. 181-193 ◽  
Author(s):  
Anna Laine ◽  
David Wilson ◽  
Gerard Kiely ◽  
Kenneth A. Byrne
Keyword(s):  
Methane Flux ◽  
Flux Dynamics ◽  
Blanket Bog

scholarly journals ENSO‐Influenced Drought Drives Methane Flux Dynamics in a Tropical Wet Forest Soil

2019 ◽  
Vol 124 (7) ◽  
pp. 2267-2276 ◽  
Author(s):  
E. L. Aronson ◽  
D. Dierick ◽  
J. K. Botthoff ◽  
S. Oberbauer ◽  
T. J. Zelikova ◽  
...  
Keyword(s):  
Forest Soil ◽  
Methane Flux ◽  
Flux Dynamics ◽  
Tropical Wet Forest

MICROBIAL COMMUNITIES AND DIFFERENTIAL METHANE FLUX IN ARCTIC GAS HYDRATE MOUNDS

2017 ◽  
Author(s):  
Stella C. Ross ◽  
◽  
Scott Klasek ◽  
Wei-Li Hong ◽  
Marta E. Torres ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Gas Hydrate ◽  
Methane Flux

Ecosystem modeling of methane and carbon dioxide fluxes for boreal forest sites

2001 ◽  
Vol 31 (2) ◽  
pp. 208-223 ◽  
Author(s):  
Christopher Potter ◽  
Jill Bubier ◽  
Patrick Crill ◽  
Peter Lafleur
Keyword(s):  
Carbon Dioxide ◽  
Boreal Forest ◽  
Land Surface ◽  
Net Primary Production ◽  
Ground Cover ◽  
Methane Flux ◽  
Growing Season ◽  
Ecosystem Model ◽  
Heat Fluxes ◽  
Water Levels

Predicted daily fluxes from an ecosystem model for water, carbon dioxide, and methane were compared with 1994 and 1996 Boreal Ecosystem–Atmosphere Study (BOREAS) field measurements at sites dominated by old black spruce (Picea mariana (Mill.) BSP) (OBS) and boreal fen vegetation near Thompson, Man. Model settings for simulating daily changes in water table depth (WTD) for both sites were designed to match observed water levels, including predictions for two microtopographic positions (hollow and hummock) within the fen study area. Water run-on to the soil profile from neighboring microtopographic units was calibrated on the basis of daily snowmelt and rainfall inputs to reproduce BOREAS site measurements for timing and magnitude of maximum daily WTD for the growing season. Model predictions for daily evapotranspiration rates closely track measured fluxes for stand water loss in patterns consistent with strong controls over latent heat fluxes by soil temperature during nongrowing season months and by variability in relative humidity and air temperature during the growing season. Predicted annual net primary production (NPP) for the OBS site was 158 g C·m–2 during 1994 and 135 g C·m–2 during 1996, with contributions of 75% from overstory canopy production and 25% from ground cover production. Annual NPP for the wetter fen site was 250 g C·m–2 during 1994 and 270 g C·m–2 during 1996. Predicted seasonal patterns for soil CO2 fluxes and net ecosystem production of carbon both match daily average estimates at the two sites. Model results for methane flux, which also closely match average measured flux levels of –0.5 mg CH4·m–2·day–1 for OBS and 2.8 mg CH4·m–2·day–1 for fen sites, suggest that spruce areas are net annual sinks of about –0.12 g CH4·m–2, whereas fen areas generate net annual emissions on the order of 0.3–0.85 g CH4·m–2, depending mainly on seasonal WTD and microtopographic position. Fen hollow areas are predicted to emit almost three times more methane during a given year than fen hummock areas. The validated model is structured for extrapolation to regional simulations of interannual trace gas fluxes over the entire North America boreal forest, with integration of satellite data to characterize properties of the land surface.

Source or sink?A study on the methane flux from mangroves stems in Zhangjiang estuary, southeast coast of China

2021 ◽  
pp. 147782
Author(s):  
Chang-Hao Gao ◽  
Shan Zhang ◽  
Qian-Su Ding ◽  
Ming-Yue Wei ◽  
Huan Li ◽  
...  
Keyword(s):  
Methane Flux ◽  
Southeast Coast

scholarly journals Microbial drivers of methane emissions from unrestored industrial salt ponds

2021 ◽  
Author(s):  
Jinglie Zhou ◽  
Susanna M. Theroux ◽  
Clifton P. Bueno de Mesquita ◽  
Wyatt H. Hartman ◽  
Ye Tian ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Methane Flux ◽  
Methane Emissions ◽  
Metagenomic Data ◽  
Rrna Gene ◽  
Salt Ponds ◽  
Salt Pond ◽  
Reference Wetlands ◽  
Reference Wetland ◽  
The Impact

AbstractWetlands are important carbon (C) sinks, yet many have been destroyed and converted to other uses over the past few centuries, including industrial salt making. A renewed focus on wetland ecosystem services (e.g., flood control, and habitat) has resulted in numerous restoration efforts whose effect on microbial communities is largely unexplored. We investigated the impact of restoration on microbial community composition, metabolic functional potential, and methane flux by analyzing sediment cores from two unrestored former industrial salt ponds, a restored former industrial salt pond, and a reference wetland. We observed elevated methane emissions from unrestored salt ponds compared to the restored and reference wetlands, which was positively correlated with salinity and sulfate across all samples. 16S rRNA gene amplicon and shotgun metagenomic data revealed that the restored salt pond harbored communities more phylogenetically and functionally similar to the reference wetland than to unrestored ponds. Archaeal methanogenesis genes were positively correlated with methane flux, as were genes encoding enzymes for bacterial methylphosphonate degradation, suggesting methane is generated both from bacterial methylphosphonate degradation and archaeal methanogenesis in these sites. These observations demonstrate that restoration effectively converted industrial salt pond microbial communities back to compositions more similar to reference wetlands and lowered salinities, sulfate concentrations, and methane emissions.

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