Spatial methane pattern in a deep freshwater lake: Relation to water depth and topography

Fuchs, Andrea; Ortega, Sonia Herrero; Xue, Bin; Casper, Peter

doi:10.1016/j.scitotenv.2020.142829

Cited by 14 publications

(11 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[2014]), Lake Stechlin (up to 39 mg CH 4 m −2 d −1 ; Li et al. [2021]) and Lake Onego (up to 95 mg CH 4 m −2 d −1 ; Thomas et al. [2018]) but consistent with values reported for Lake Soppensee (up to 253 mg CH 4 m −2 d −1 ; Vachon et al.…”

Section: Discussionsupporting

confidence: 78%

“…In Lake Remoray, methane diffusion from the sediment to the water column varied according to sampling depth, ranging from 50 to 200 mg CH 4 m −2 d −1 in profundal and littoral sampling points close to the farm, outlet, and campsite. These methane diffusion figures are higher than previously reported for Lake Geneva (up to 37 mg CH 4 m −2 d −1 ; Sollberger et al [2014]), Lake Stechlin (up to 39 mg CH 4 m −2 d −1 ; Li et al [2021]) and Lake Onego (up to 95 mg CH 4 m −2 d −1 ; Thomas et al [2018]) but consistent with values reported for Lake Soppensee (up to 253 mg CH 4 m −2 d −1 ; Vachon et al [2019]). This confirms the large contribution of the sediment of Lake Remoray to the methane cycle.…”

Section: Spatial Heterogeneity Of Sediment Methane Production and Con...contrasting

confidence: 63%

“…Given that Lake Remoray annually experiences long anoxia‐periods in the deeper layers of the water column, we expected a higher contribution of methane production in the sediment in the profundal than in the littoral areas. Previous studies have reported higher methane production in littoral zones relative to profundal‐zone sediment (Holgerson & Raymond, 2016; Juutinen et al., 2003; Li et al., 2018, 2021; Murase et al., 2003; Thebrath et al., 1993). Altogether, this highlights the importance of taking into account the spatial resolution of microbial activities within the sediment at the lake scale.…”

Section: Discussionmentioning

confidence: 93%

See 2 more Smart Citations

Lake Sediments From Littoral and Profundal Zones are Heterogeneous but Equivalent Sources of Methane Produced by Distinct Methanogenic Communities—A Case Study From Lake Remoray

et al. 2022

View full text Add to dashboard Cite

Methane ranks just behind carbon dioxide as a major greenhouse gas, with a 12-year lifetime in the atmosphere, a global warming potential 72 times higher than CO 2 over a 20-year timescale (25 times higher over 100 years), and a radiative forcing of +0.48 W m −2 (IPCC, 2007). Methane concentration in the atmosphere is currently about 1,850 ppb (Nisbet et al., 2019), which is an increase of more than 150% since the pre-industrial era and rising fast at the unprecedented rate of >5 ppb yr −1 in the 2004-2017 period (Nisbet et al., 2019).Atmospheric methane is mostly anthropogenic: fossil fuel extraction and agricultural practices account for about 60% of methane emissions (Saunois et al., 2020). Other sources are natural: wetlands ecosystems are the biggest natural source of atmospheric methane, followed by lake ecosystems which account for 6%-16% of non-anthropogenic emissions (Bastviken et al., 2004). Depending on the methodologies applied, lakes are estimated to be responsible for up to 50 (Johnson et al., 2022) to 150 Tg (Saunois et al., 2020) of C-CH 4 emitted to the atmosphere per year. Recent models project that lake emissions will increase under the combined effects of

show abstract

Section: Discussionsupporting

confidence: 78%

Section: Spatial Heterogeneity Of Sediment Methane Production and Con...contrasting

confidence: 63%

Section: Discussionmentioning

confidence: 93%

See 1 more Smart Citation

Lake Sediments From Littoral and Profundal Zones are Heterogeneous but Equivalent Sources of Methane Produced by Distinct Methanogenic Communities—A Case Study From Lake Remoray

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Much (12–38%) of the remaining CH 4 accumulated in the hypolimnion and a small amount (0.07–3.2%) diffused across the metalimnion to the epilimnion. These results are consistent with other studies of stratified lakes with anoxic hypolimnia, which show that most CH 4 diffusing out of profundal sediments is consumed before reaching the lake surface (Bastviken et al 2008; Donis et al 2017; Li et al 2021). In Peter, Paul, and Hummingbird Lakes, 20–45% of CH 4 released from deep sediments was stored in the water column and 51–80% was oxidized, primarily in the anoxic hypolimnion (Bastviken et al 2008).…”

Section: Discussionsupporting

confidence: 92%

In situ flux estimates reveal large variations in methane flux across the bottom boundary layer of a eutrophic lake

D’Ambrosio

Henderson

Nielson

et al. 2022

Limnology & Oceanography

View full text Add to dashboard Cite

Methane (CH4) produced in anoxic sediments plays a significant role in the carbon economy of many lakes and reservoirs. CH4 released from sediments first crosses the bottom boundary layer (BBL), the layer of water overlying the lakebed where currents are slowed by friction with the sediments below. Physical and biogeochemical conditions in the BBL, which can fluctuate hourly to daily with basin‐wide internal waves (seiches), likely influence CH4 transport from sediments into the hypolimnion. In this study, we estimated CH4 fluxes across the BBL of a eutrophic lake using a novel in situ flux gradient approach adapted from marine applications. For 2–6 h periods throughout the spring and summer, we estimated CH4 fluxes across the BBL using simultaneous measurements of CH4 concentrations, turbulent mixing, and thermal stratification. Sub‐daily variation in CH4 fluxes was high, and CH4 fluxes sometimes changed several‐fold within hours. These rapid shifts in BBL fluxes were likely influenced by fluctuations in seiche‐driven variations in the intensity of BBL turbulent mixing. Fluxes increased from spring to summer, concurrent with the development of lake stratification, and fueled an accumulation of CH4 below the thermocline. Throughout the summer, CH4 flux across the BBL exceeded CH4 accumulation below the thermocline, suggesting significant methanotrophy in the hypolimnion, consistent with incubation‐based oxidation rates. Our results are the first to demonstrate sub‐daily and seasonal variability in the timing and magnitude of CH4 fluxes within a lake BBL, and highlight a need to quantify such variability in other lentic systems.

show abstract

“…Oxidation may reduce methane concentrations by up to 99% during its diffusive ascension from the sediment towards the water surface (Bastviken et al., 2008; Frenzel et al., 1990). This leads to a decoupling of anaerobic methane production in sediments and emission across the water‐atmosphere interface (Li et al., 2021). Frequently, CH 4 oversaturation—relative to atmospheric CH 4 concentrations—is detected at the water surface of freshwater lakes.…”

Section: Discussionmentioning

confidence: 99%

Dynamics of Greenhouse Gases (CH₄ and CO₂) in Meromictic Lake Burgsee, Germany

2022

Self Cite

View full text Add to dashboard Cite

Methane formed in freshwater lakes is emitted to the atmosphere by different pathways, mainly by diffusion, ebullition, or plant-mediated release (Bastviken et al., 2011). However, gases may be trapped or accumulate during the ascension due to floating macrophytes (Attermeyer et al., 2016), ice-covers (Greene et al., 2014), thermoclines (Donis et al., 2017, or chemical gradients found in volcanic (Descy et al., 2012) and other meromictic lakes (Boehrer et al., 2017). In meromictic lakes, that is, permanently stratified lakes, chemical stratification causes a nonrecirculating monimolimnion that prevents the release of gases and nutrients into the upper water layers, and thus, to the atmosphere. The water body above the chemocline, the mixolimnion, may stratify into epilimnion and hypolimnion and may recirculate seasonally (Boehrer et al., 2017;Boehrer & Schultze, 2008). Due to the lack of mixing, oxygen may get depleted in the deeper layers of the hypolimnion of holomictic and meromictic lakes at the end of the summer stratification, and is usually depleted in the monimolimnion of meromictic lakes. Under anoxic conditions, anaerobic decomposition processes dominate, with carbon dioxide (CO 2 ) and methane (CH 4 ) being key products. In temperate latitudes, CO 2 and CH 4 concentrations reach on average < 1 mmol L −1 in the hypolimnion of holomictic lakes (Juutinen et al., 2009), whereas these gases may accumulate to enormous

show abstract

Spatial methane pattern in a deep freshwater lake: Relation to water depth and topography

Cited by 14 publications

References 72 publications

Lake Sediments From Littoral and Profundal Zones are Heterogeneous but Equivalent Sources of Methane Produced by Distinct Methanogenic Communities—A Case Study From Lake Remoray

Lake Sediments From Littoral and Profundal Zones are Heterogeneous but Equivalent Sources of Methane Produced by Distinct Methanogenic Communities—A Case Study From Lake Remoray

In situ flux estimates reveal large variations in methane flux across the bottom boundary layer of a eutrophic lake

Dynamics of Greenhouse Gases (CH₄ and CO₂) in Meromictic Lake Burgsee, Germany

Contact Info

Product

Resources

About

Spatial methane pattern in a deep freshwater lake: Relation to water depth and topography

Cited by 14 publications

References 72 publications

Lake Sediments From Littoral and Profundal Zones are Heterogeneous but Equivalent Sources of Methane Produced by Distinct Methanogenic Communities—A Case Study From Lake Remoray

Lake Sediments From Littoral and Profundal Zones are Heterogeneous but Equivalent Sources of Methane Produced by Distinct Methanogenic Communities—A Case Study From Lake Remoray

In situ flux estimates reveal large variations in methane flux across the bottom boundary layer of a eutrophic lake

Dynamics of Greenhouse Gases (CH4 and CO2) in Meromictic Lake Burgsee, Germany

Contact Info

Product

Resources

About

Dynamics of Greenhouse Gases (CH₄ and CO₂) in Meromictic Lake Burgsee, Germany