Methane and carbon dioxide dynamics within four vernal pools in Maine, USA

Kifner, Lydia H.; Calhoun, Aram J. K.; Norton, Stephen A.; Hoffmann, Kristine; Amirbahman, Aria

doi:10.1007/s10533-018-0467-5

Cited by 15 publications

(15 citation statements)

References 66 publications

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“…The presence of vernal pools in a stream corridor had an outsized impact on corridor-scale carbon emissions. Vernal pool CO 2 and CH 4 emissions were high, but not different from the range of values reported for other freshwater wetlands and vernal pools (e.g., Bolpagni et al, 2017;Boon et al, 1997;Kifner et al, 2018). Riparian zones accumulate organic matter along streams, directly influencing the size (Ledesma et al, 2015) and arrangement (Leith et al, 2015;Teodoru et al, 2009) of connections between corridor patches and the stream channel, and thus shape corridor carbon fluxes.…”

Section: Discussionmentioning

confidence: 64%

Integrating Ecosystem Patch Contributions to Stream Corridor Carbon Dioxide and Methane Fluxes

et al. 2021

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As water moves carbon through watersheds and across ecosystem boundaries, stream corridors collect and integrate landscape-scale signals of carbon cycling. Streams metabolize organic carbon and emit carbon dioxide (CO 2 ) and methane (CH 4 ) derived from internal metabolism and external sources (Hotchkiss et al., 2015;Stanley et al., 2016). The rates at which streams emit carbon to the atmosphere reflects their importance in local and global carbon cycling. Streams emit CO 2 globally at a rate that surpasses the terrestrial and oceanic carbon sinks (Webb et al., 2018) and emit approximately 5% of yearly global CH 4 to the atmosphere (Flury & Ulseth, 2019;Stanley et al., 2016). As global concentrations of atmospheric greenhouse gases continue to rise, quantifying the relative contributions of different sources and sinks of CO 2 and CH 4 grows ever more important.

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Section: Discussionmentioning

confidence: 64%

Integrating Ecosystem Patch Contributions to Stream Corridor Carbon Dioxide and Methane Fluxes

et al. 2021

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“…ebullition) that limit the potential mitigation by CH 4 oxidation (Holgerson & Raymond, 2016). Since Holgerson and Raymond’s (2016) synthesis was published, additional studies have found high GHG fluxes from vernal pools (Kifner et al, 2018), thaw ponds (Kuhn et al, 2018) and artificial ponds (Gorsky et al, 2019; Grinham et al, 2018; Martinez‐Cruz et al, 2017; Ollivier et al, 2019a; Peacock et al, 2019; Webb, Leavitt, et al, 2019). A new synthesis further supports the inverse lake size–GHG flux relationship: 37% of total lentic CH 4 emissions (diffusive + ebullitive) came from waterbodies <0.001 km 2 in size (Rosentreter et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Small artificial waterbodies are widespread and persistent emitters of methane and carbon dioxide

Peacock

Audet

Bastviken

et al. 2021

Global Change Biology

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“…Such dynamic hydroperiods influence every aspect of these systems -from the ecology and breeding success of amphibian species (Chandler et al, 2017) to soil nutrient cycling (Marton et al, 2015;Hansen et al, 2018). These variable hydrologic conditions also stimulate the aerobic and anaerobic heterotrophic decomposition of organic C, resulting in the production and emission of two important greenhouse gases: carbon dioxide (CO 2 ) and methane (CH 4 ) (Bansal et al, 2016;Kifner et al, 2018;Bledsoe and Peralta, 2020). The extent to which wetlands produce and emit greenhouse gases is intimately tied to the underlying soil microbial population; however, insights into seasonal wetland microbial communities are poorly understood.…”

Section: Introductionmentioning

confidence: 99%

Hydrological Conditions Influence Soil and Methane-Cycling Microbial Populations in Seasonally Saturated Wetlands

Maietta

Hondula

Jones

et al. 2020

Front. Environ. Sci.

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Seasonally saturated wetlands are hydrologically dynamic ecosystems that provide various ecosystem services; however, their variable hydrologic conditions may promote greenhouse gas emissions. The extent to which wetlands produce and emit greenhouse gases is intimately tied to the underlying microbial community. We established a linear transect spanning a hydrologic gradient on the margins adjacent to five seasonally saturated wetlands to characterize how water level, saturation duration, and frequency of wet-dry cycles influenced the soil and methane-cycling microbial community composition. We found that the soil and methane-cycling microbial community diversity and structure were strongly related to water level changes and saturation duration but not saturation frequency. Soils that experienced inundation or saturation for more than 50% of the year harbored a soil microbial composition distinct from soils that were rarely saturated or inundated. While soils closer to the wetland basin supported a higher relative abundance of methanogens, methane-oxidizing microbes were present across the entire topographic gradient; however, the composition shifted from a primarily anaerobic to aerobic methanotroph community. Findings suggest that soil and methane cycling microorganisms are influenced by the soil's hydrologic conditions, with methane producers being restricted to specific ranges and methane oxidizers able to occur under a variety of hydrologic conditions. The mechanisms driving methane oxidation by the latter, however, may depend on the hydrologic conditions.

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Methane and carbon dioxide dynamics within four vernal pools in Maine, USA

Cited by 15 publications

References 66 publications

Integrating Ecosystem Patch Contributions to Stream Corridor Carbon Dioxide and Methane Fluxes

Integrating Ecosystem Patch Contributions to Stream Corridor Carbon Dioxide and Methane Fluxes

Small artificial waterbodies are widespread and persistent emitters of methane and carbon dioxide

Hydrological Conditions Influence Soil and Methane-Cycling Microbial Populations in Seasonally Saturated Wetlands

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