Articles | Volume 17, issue 12
https://doi.org/10.5194/bg-17-3223-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-17-3223-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 Jun 2020
Research article |
| 26 Jun 2020
| 26 Jun 2020
Dissolved CH4 coupled to photosynthetic picoeukaryotes in oxic waters and to cumulative chlorophyll a in anoxic waters of reservoirs
Elizabeth León-Palmero
Departamento de Ecología and Instituto del Agua, Universidad de
Granada, 18071, Granada, Spain
Alba Contreras-Ruiz
Departamento de Ecología and Instituto del Agua, Universidad de
Granada, 18071, Granada, Spain
Ana Sierra
Departamento de Química Física and Instituto Universitario
de Investigación Marina (INMAR), Facultad de Ciencias del Mar y
Ambientales, Universidad de Cádiz, Puerto Real, 11510, Cádiz, Spain
Rafael Morales-Baquero
Departamento de Ecología and Instituto del Agua, Universidad de
Granada, 18071, Granada, Spain
Departamento de Ecología and Instituto del Agua, Universidad de
Granada, 18071, Granada, Spain
Research Unit “Modeling Nature” (MNat), Universidad de Granada, 18071, Granada,
Spain
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The production of N2O via nitrification and denitrification associated with low-O2 waters is a major source of oceanic N2O. We investigated the regulation and dynamics of these processes with respect to O2 and organic matter inputs. The transcription of the key nitrification gene amoA rapidly responded to changes in O2 and strongly correlated with N2O production rates. N2O production by denitrification was clearly stimulated by organic carbon, implying that its supply controls N2O production.
Ihab Alfadhel, Ignacio Peralta-Maraver, Isabel Reche, Enrique P. Sánchez-Cañete, Sergio Aranda-Barranco, Eva Rodríguez-Velasco, Andrew S. Kowalski, and Penélope Serrano-Ortiz
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Inland saline lakes are crucial in the global carbon cycle, but increased droughts may alter their carbon exchange capacity. We measured CO2 and CH4 fluxes in a Mediterranean saline lake using the Eddy Covariance method under dry and wet conditions. We found the lake acts as a carbon sink during wet periods but not during droughts. These results highlight the importance of saline lakes in carbon sequestration and their vulnerability to climate change-induced droughts.
Claudia Frey, Hermann W. Bange, Eric P. Achterberg, Amal Jayakumar, Carolin R. Löscher, Damian L. Arévalo-Martínez, Elizabeth León-Palmero, Mingshuang Sun, Xin Sun, Ruifang C. Xie, Sergey Oleynik, and Bess B. Ward
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The production of N2O via nitrification and denitrification associated with low-O2 waters is a major source of oceanic N2O. We investigated the regulation and dynamics of these processes with respect to O2 and organic matter inputs. The transcription of the key nitrification gene amoA rapidly responded to changes in O2 and strongly correlated with N2O production rates. N2O production by denitrification was clearly stimulated by organic carbon, implying that its supply controls N2O production.
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Biogeosciences Discuss., https://doi.org/10.5194/bg-2020-60, https://doi.org/10.5194/bg-2020-60, 2020
Manuscript not accepted for further review
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To investigate dust deposition dynamics at the regional scale, five automatic deposition collectors named CARAGA have been deployed in the western Mediterranean basin (Lampedusa, Majorca, Corsica, Frioul and Le Casset) during 1 to 3 years depending on the station. Complementary observations provided by both satellite and air mass trajectories are used to identify the dust provenance areas and the transport pathways from the Sahara to the stations for the studied period.
I. de Vicente, E. Ortega-Retuerta, R. Morales-Baquero, and I. Reche
Biogeosciences, 9, 5049–5060, https://doi.org/10.5194/bg-9-5049-2012, https://doi.org/10.5194/bg-9-5049-2012, 2012
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Ingeborg Bussmann, Eric P. Achterberg, Holger Brix, Nicolas Brüggemann, Götz Flöser, Claudia Schütze, and Philipp Fischer
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Methane (CH4) is an important greenhouse gas and contributes to climate warming. However, the input of CH4 from coastal areas to the atmosphere is not well defined. Dissolved and atmospheric CH4 was determined at high spatial resolution in or above the North Sea. The atmospheric CH4 concentration was mainly influenced by wind direction. With our detailed study on the spatial distribution of CH4 fluxes we were able to provide a detailed and more realistic estimation of coastal CH4 fluxes.
Niu Zhu, Jinniu Wang, Dongliang Luo, Xufeng Wang, Cheng Shen, and Ning Wu
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Hella van Asperen, Thorsten Warneke, Alessandro Carioca de Araújo, Bruce Forsberg, Sávio José Filgueiras Ferreira, Thomas Röckmann, Carina van der Veen, Sipko Bulthuis, Leonardo Ramos de Oliveira, Thiago de Lima Xavier, Jailson da Mata, Marta de Oliveira Sá, Paulo Ricardo Teixeira, Julie Andrews de França e Silva, Susan Trumbore, and Justus Notholt
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Ihab Alfadhel, Ignacio Peralta-Maraver, Isabel Reche, Enrique P. Sánchez-Cañete, Sergio Aranda-Barranco, Eva Rodríguez-Velasco, Andrew S. Kowalski, and Penélope Serrano-Ortiz
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Yélognissè Agbohessou, Claire Delon, Manuela Grippa, Eric Mougin, Daouda Ngom, Espoir Koudjo Gaglo, Ousmane Ndiaye, Paulo Salgado, and Olivier Roupsard
Biogeosciences, 21, 2811–2837, https://doi.org/10.5194/bg-21-2811-2024, https://doi.org/10.5194/bg-21-2811-2024, 2024
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Emissions of greenhouse gases in the Sahel are not well represented because they are considered weak compared to the rest of the world. However, natural areas in the Sahel emit carbon dioxide and nitrous oxides, which need to be assessed because of extended surfaces. We propose an assessment of such emissions in Sahelian silvopastoral systems and of how they are influenced by environmental characteristics. These results are essential to inform climate change strategies in the region.
Merit van den Berg, Thomas M. Gremmen, Renske J. E. Vroom, Jacobus van Huissteden, Jim Boonman, Corine J. A. van Huissteden, Ype van der Velde, Alfons J. P. Smolders, and Bas P. van de Riet
Biogeosciences, 21, 2669–2690, https://doi.org/10.5194/bg-21-2669-2024, https://doi.org/10.5194/bg-21-2669-2024, 2024
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Drained peatlands emit 3 % of the global greenhouse gas emissions. Paludiculture is a way to reduce CO2 emissions while at the same time generating an income for landowners. The side effect is the potentially high methane emissions. We found very high methane emissions for broadleaf cattail compared with narrowleaf cattail and water fern. The rewetting was, however, effective to stop CO2 emissions for all species. The highest potential to reduce greenhouse gas emissions had narrowleaf cattail.
Thea H. Heimdal, Galen A. McKinley, Adrienne J. Sutton, Amanda R. Fay, and Lucas Gloege
Biogeosciences, 21, 2159–2176, https://doi.org/10.5194/bg-21-2159-2024, https://doi.org/10.5194/bg-21-2159-2024, 2024
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Measurements of ocean carbon are limited in time and space. Machine learning algorithms are therefore used to reconstruct ocean carbon where observations do not exist. Improving these reconstructions is important in order to accurately estimate how much carbon the ocean absorbs from the atmosphere. In this study, we find that a small addition of observations from the Southern Ocean, obtained by autonomous sampling platforms, could significantly improve the reconstructions.
Guilherme L. Torres Mendonça, Julia Pongratz, and Christian H. Reick
Biogeosciences, 21, 1923–1960, https://doi.org/10.5194/bg-21-1923-2024, https://doi.org/10.5194/bg-21-1923-2024, 2024
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We study the timescale dependence of airborne fraction and underlying feedbacks by a theory of the climate–carbon system. Using simulations we show the predictive power of this theory and find that (1) this fraction generally decreases for increasing timescales and (2) at all timescales the total feedback is negative and the model spread in a single feedback causes the spread in the airborne fraction. Our study indicates that those are properties of the system, independently of the scenario.
François Clayer, Jan Erik Thrane, Kuria Ndungu, Andrew King, Peter Dörsch, and Thomas Rohrlack
Biogeosciences, 21, 1903–1921, https://doi.org/10.5194/bg-21-1903-2024, https://doi.org/10.5194/bg-21-1903-2024, 2024
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Determination of dissolved greenhouse gas (GHG) in freshwater allows us to estimate GHG fluxes. Mercuric chloride (HgCl2) is used to preserve water samples prior to GHG analysis despite its environmental and health impacts and interferences with water chemistry in freshwater. Here, we tested the effects of HgCl2, two substitutes and storage time on GHG in water from two boreal lakes. Preservation with HgCl2 caused overestimation of CO2 concentration with consequences for GHG flux estimation.
Helena Rautakoski, Mika Korkiakoski, Jarmo Mäkelä, Markku Koskinen, Kari Minkkinen, Mika Aurela, Paavo Ojanen, and Annalea Lohila
Biogeosciences, 21, 1867–1886, https://doi.org/10.5194/bg-21-1867-2024, https://doi.org/10.5194/bg-21-1867-2024, 2024
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Current and future nitrous oxide (N2O) emissions are difficult to estimate due to their high variability in space and time. Several years of N2O fluxes from drained boreal peatland forest indicate high importance of summer precipitation, winter temperature, and snow conditions in controlling annual N2O emissions. The results indicate increasing year-to-year variation in N2O emissions in changing climate with more extreme seasonal weather conditions.
Matthias Koschorreck, Norbert Kamjunke, Uta Koedel, Michael Rode, Claudia Schuetze, and Ingeborg Bussmann
Biogeosciences, 21, 1613–1628, https://doi.org/10.5194/bg-21-1613-2024, https://doi.org/10.5194/bg-21-1613-2024, 2024
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We measured the emission of carbon dioxide (CO2) and methane (CH4) from different sites at the river Elbe in Germany over 3 days to find out what is more important for quantification: small-scale spatial variability or diurnal temporal variability. We found that CO2 emissions were very different between day and night, while CH4 emissions were more different between sites. Dried out river sediments contributed to CO2 emissions, while the side areas of the river were important CH4 sources.
Odysseas Sifounakis, Edwin Haas, Klaus Butterbach-Bahl, and Maria P. Papadopoulou
Biogeosciences, 21, 1563–1581, https://doi.org/10.5194/bg-21-1563-2024, https://doi.org/10.5194/bg-21-1563-2024, 2024
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We performed a full assessment of the carbon and nitrogen cycles of a cropland ecosystem. An uncertainty analysis and quantification of all carbon and nitrogen fluxes were deployed. The inventory simulations include greenhouse gas emissions of N2O, NH3 volatilization and NO3 leaching from arable land cultivation in Greece. The inventory also reports changes in soil organic carbon and nitrogen stocks in arable soils.
Nathaniel B. Weston, Cynthia Troy, Patrick J. Kearns, Jennifer L. Bowen, William Porubsky, Christelle Hyacinthe, Christof Meile, Philippe Van Cappellen, and Samantha B. Joye
EGUsphere, https://doi.org/10.5194/egusphere-2024-448, https://doi.org/10.5194/egusphere-2024-448, 2024
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Nitrous oxide (N2O) is a potent greenhouse and ozone depleting gas produced largely from microbial nitrogen cycling processes, and human activities have resulted in increases in atmospheric N2O. We investigate the role of physical and chemical disturbance to soils and sediments. We demonstrate that the disturbance increases N2O production, the microbial community adapts to disturbance over time, an initial disturbance appears to confer resilience to subsequent disturbance.
Sarah M. Ludwig, Luke Schiferl, Jacqueline Hung, Susan M. Natali, and Roisin Commane
Biogeosciences, 21, 1301–1321, https://doi.org/10.5194/bg-21-1301-2024, https://doi.org/10.5194/bg-21-1301-2024, 2024
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Landscapes are often assumed to be homogeneous when using eddy covariance fluxes, which can lead to biases when calculating carbon budgets. In this study we report eddy covariance carbon fluxes from heterogeneous tundra. We used the footprints of each flux observation to unmix the fluxes coming from components of the landscape. We identified and quantified hot spots of carbon emissions in the landscape. Accurately scaling with landscape heterogeneity yielded half as much regional carbon uptake.
Martti Honkanen, Mika Aurela, Juha Hatakka, Lumi Haraguchi, Sami Kielosto, Timo Mäkelä, Jukka Seppälä, Simo-Matti Siiriä, Ken Stenbäck, Juha-Pekka Tuovinen, Pasi Ylöstalo, and Lauri Laakso
EGUsphere, https://doi.org/10.5194/egusphere-2024-628, https://doi.org/10.5194/egusphere-2024-628, 2024
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We present the 5-year (2017–2021) data set of the air-sea CO2 flux measurements made in the Archipelago Sea, the Baltic Sea. The study site was found to act as a net source of CO2 with an average annual net air-sea CO2 exchange of 27.1 gC m-2 y-1, indicating that this marine system respires carbon originated elsewhere. The annual CO2 emission varied between 18.2 in 2018 and 39.2 gC m-2 y-1 in 2017. These two years differed greatly in terms of the algal blooms and the pCO2 drawdown.
Silvie Lainela, Erik Jacobs, Stella-Theresa Stoicescu, Gregor Rehder, and Urmas Lips
EGUsphere, https://doi.org/10.5194/egusphere-2024-598, https://doi.org/10.5194/egusphere-2024-598, 2024
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We evaluate the variability of carbon dioxide and methane in the surface layer of the north-eastern basins of the Baltic Sea in 2018. We show that the shallower coastal areas have considerably higher spatial variability and seasonal amplitude of surface layer pCO2 and cCH4 than measured in the Baltic Sea offshore areas. Despite this high variability, caused mostly by coastal physical processes, the average annual air-sea CO2 fluxes differed only marginally between the sub-basins.
Sigrid Trier Kjær, Sebastian Westermann, Nora Nedkvitne, and Peter Dörsch
EGUsphere, https://doi.org/10.5194/egusphere-2024-562, https://doi.org/10.5194/egusphere-2024-562, 2024
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Permafrost peatlands are thawing due to climate change, releasing large quantities of carbon that degrades upon thawing and is released as CO2, CH4, or dissolved organic carbon (DOC). We incubated thawed Norwegian permafrost peat plateaus and thermokarst pond sediment found next to permafrost for up to 350 days to measure carbon loss. CO2 production was largest initially, while CH4 production increased over time. The largest carbon loss was measured at the top of the peat plateau core as DOC.
Justine Trémeau, Beñat Olascoaga, Leif Backman, Esko Karvinen, Henriikka Vekuri, and Liisa Kulmala
Biogeosciences, 21, 949–972, https://doi.org/10.5194/bg-21-949-2024, https://doi.org/10.5194/bg-21-949-2024, 2024
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We studied urban lawns and meadows in the Helsinki metropolitan area, Finland. We found that meadows are more resistant to drought events but that they do not increase carbon sequestration compared with lawns. Moreover, the transformation from lawns to meadows did not demonstrate any negative climate effects in terms of greenhouse gas emissions. Even though social and economic aspects also steer urban development, these results can guide planning to consider carbon-smart options.
Guantao Chen, Edzo Veldkamp, Muhammad Damris, Bambang Irawan, Aiyen Tjoa, and Marife D. Corre
Biogeosciences, 21, 513–529, https://doi.org/10.5194/bg-21-513-2024, https://doi.org/10.5194/bg-21-513-2024, 2024
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We established an oil palm management experiment in a large-scale oil palm plantation in Jambi, Indonesia. We recorded oil palm fruit yield and measured soil CO2, N2O, and CH4 fluxes. After 4 years of treatment, compared with conventional fertilization with herbicide weeding, reduced fertilization with mechanical weeding did not reduce yield and soil greenhouse gas emissions, which highlights the legacy effects of over a decade of conventional management prior to the start of the experiment.
Elizabeth Gachibu Wangari, Ricky Mwangada Mwanake, Tobias Houska, David Kraus, Gretchen Maria Gettel, Ralf Kiese, Lutz Breuer, and Klaus Butterbach-Bahl
Biogeosciences, 20, 5029–5067, https://doi.org/10.5194/bg-20-5029-2023, https://doi.org/10.5194/bg-20-5029-2023, 2023
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Agricultural landscapes act as sinks or sources of the greenhouse gases (GHGs) CO2, CH4, or N2O. Various physicochemical and biological processes control the fluxes of these GHGs between ecosystems and the atmosphere. Therefore, fluxes depend on environmental conditions such as soil moisture, soil temperature, or soil parameters, which result in large spatial and temporal variations of GHG fluxes. Here, we describe an example of how this variation may be studied and analyzed.
Laurie C. Menviel, Paul Spence, Andrew E. Kiss, Matthew A. Chamberlain, Hakase Hayashida, Matthew H. England, and Darryn Waugh
Biogeosciences, 20, 4413–4431, https://doi.org/10.5194/bg-20-4413-2023, https://doi.org/10.5194/bg-20-4413-2023, 2023
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As the ocean absorbs 25% of the anthropogenic emissions of carbon, it is important to understand the impact of climate change on the flux of carbon between the ocean and the atmosphere. Here, we use a very high-resolution ocean, sea-ice, carbon cycle model to show that the capability of the Southern Ocean to uptake CO2 has decreased over the last 40 years due to a strengthening and poleward shift of the southern hemispheric westerlies. This trend is expected to continue over the coming century.
Petr Znachor, Jiří Nedoma, Vojtech Kolar, and Anna Matoušů
Biogeosciences, 20, 4273–4288, https://doi.org/10.5194/bg-20-4273-2023, https://doi.org/10.5194/bg-20-4273-2023, 2023
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We conducted intensive spatial sampling of the hypertrophic fishpond to better understand the spatial dynamics of methane fluxes and environmental heterogeneity in fishponds. The diffusive fluxes of methane accounted for only a minor fraction of the total fluxes and both varied pronouncedly within the pond and over the studied summer season. This could be explained only by the water depth. Wind substantially affected temperature, oxygen and chlorophyll a distribution in the pond.
Sofie Sjögersten, Martha Ledger, Matthias Siewert, Betsabé de la Barreda-Bautista, Andrew Sowter, David Gee, Giles Foody, and Doreen S. Boyd
Biogeosciences, 20, 4221–4239, https://doi.org/10.5194/bg-20-4221-2023, https://doi.org/10.5194/bg-20-4221-2023, 2023
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Permafrost thaw in Arctic regions is increasing methane emissions, but quantification is difficult given the large and remote areas impacted. We show that UAV data together with satellite data can be used to extrapolate emissions across the wider landscape as well as detect areas at risk of higher emissions. A transition of currently degrading areas to fen type vegetation can increase emission by several orders of magnitude, highlighting the importance of quantifying areas at risk.
Cole G. Brachmann, Tage Vowles, Riikka Rinnan, Mats P. Björkman, Anna Ekberg, and Robert G. Björk
Biogeosciences, 20, 4069–4086, https://doi.org/10.5194/bg-20-4069-2023, https://doi.org/10.5194/bg-20-4069-2023, 2023
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Herbivores change plant communities through grazing, altering the amount of CO2 and plant-specific chemicals (termed VOCs) emitted. We tested this effect by excluding herbivores and studying the CO2 and VOC emissions. Herbivores reduced CO2 emissions from a meadow community and altered VOC composition; however, community type had the strongest effect on the amount of CO2 and VOCs released. Herbivores can mediate greenhouse gas emissions, but the effect is marginal and community dependent.
Ole Lessmann, Jorge Encinas Fernández, Karla Martínez-Cruz, and Frank Peeters
Biogeosciences, 20, 4057–4068, https://doi.org/10.5194/bg-20-4057-2023, https://doi.org/10.5194/bg-20-4057-2023, 2023
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Based on a large dataset of seasonally resolved methane (CH4) pore water concentrations in a reservoir's sediment, we assess the significance of CH4 emissions due to reservoir flushing. In the studied reservoir, CH4 emissions caused by one flushing operation can represent 7 %–14 % of the annual CH4 emissions and depend on the timing of the flushing operation. In reservoirs with high sediment loadings, regular flushing may substantially contribute to the overall CH4 emissions.
Matti Räsänen, Risto Vesala, Petri Rönnholm, Laura Arppe, Petra Manninen, Markus Jylhä, Jouko Rikkinen, Petri Pellikka, and Janne Rinne
Biogeosciences, 20, 4029–4042, https://doi.org/10.5194/bg-20-4029-2023, https://doi.org/10.5194/bg-20-4029-2023, 2023
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Fungus-growing termites recycle large parts of dead plant material in African savannas and are significant sources of greenhouse gases. We measured CO2 and CH4 fluxes from their mounds and surrounding soils in open and closed habitats. The fluxes scale with mound volume. The results show that emissions from mounds of fungus-growing termites are more stable than those from other termites. The soil fluxes around the mound are affected by the termite colonies at up to 2 m distance from the mound.
Tim René de Groot, Anne Margriet Mol, Katherine Mesdag, Pierre Ramond, Rachel Ndhlovu, Julia Catherine Engelmann, Thomas Röckmann, and Helge Niemann
Biogeosciences, 20, 3857–3872, https://doi.org/10.5194/bg-20-3857-2023, https://doi.org/10.5194/bg-20-3857-2023, 2023
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This study investigates methane dynamics in the Wadden Sea. Our measurements revealed distinct variations triggered by seasonality and tidal forcing. The methane budget was higher in warmer seasons but surprisingly high in colder seasons. Methane dynamics were amplified during low tides, flushing the majority of methane into the North Sea or releasing it to the atmosphere. Methanotrophic activity was also elevated during low tide but mitigated only a small fraction of the methane efflux.
Frederic Thalasso, Brenda Riquelme, Andrés Gómez, Roy Mackenzie, Francisco Javier Aguirre, Jorge Hoyos-Santillan, Ricardo Rozzi, and Armando Sepulveda-Jauregui
Biogeosciences, 20, 3737–3749, https://doi.org/10.5194/bg-20-3737-2023, https://doi.org/10.5194/bg-20-3737-2023, 2023
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A robust skirt-chamber design to capture and quantify greenhouse gas emissions from peatlands is presented. Compared to standard methods, this design improves the spatial resolution of field studies in remote locations while minimizing intrusion.
Gesa Schulz, Tina Sanders, Yoana G. Voynova, Hermann W. Bange, and Kirstin Dähnke
Biogeosciences, 20, 3229–3247, https://doi.org/10.5194/bg-20-3229-2023, https://doi.org/10.5194/bg-20-3229-2023, 2023
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Nitrous oxide (N2O) is an important greenhouse gas. However, N2O emissions from estuaries underlie significant uncertainties due to limited data availability and high spatiotemporal variability. We found the Elbe Estuary (Germany) to be a year-round source of N2O, with the highest emissions in winter along with high nitrogen loads. However, in spring and summer, N2O emissions did not decrease alongside lower nitrogen loads because organic matter fueled in situ N2O production along the estuary.
Alex Mavrovic, Oliver Sonnentag, Juha Lemmetyinen, Jennifer L. Baltzer, Christophe Kinnard, and Alexandre Roy
Biogeosciences, 20, 2941–2970, https://doi.org/10.5194/bg-20-2941-2023, https://doi.org/10.5194/bg-20-2941-2023, 2023
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This review supports the integration of microwave spaceborne information into carbon cycle science for Arctic–boreal regions. The microwave data record spans multiple decades with frequent global observations of soil moisture and temperature, surface freeze–thaw cycles, vegetation water storage, snowpack properties, and land cover. This record holds substantial unexploited potential to better understand carbon cycle processes.
Zoé Rehder, Thomas Kleinen, Lars Kutzbach, Victor Stepanenko, Moritz Langer, and Victor Brovkin
Biogeosciences, 20, 2837–2855, https://doi.org/10.5194/bg-20-2837-2023, https://doi.org/10.5194/bg-20-2837-2023, 2023
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We use a new model to investigate how methane emissions from Arctic ponds change with warming. We find that emissions increase substantially. Under annual temperatures 5 °C above present temperatures, pond methane emissions are more than 3 times higher than now. Most of this increase is caused by an increase in plant productivity as plants provide the substrate microbes used to produce methane. We conclude that vegetation changes need to be included in predictions of pond methane emissions.
Julian Koch, Lars Elsgaard, Mogens H. Greve, Steen Gyldenkærne, Cecilie Hermansen, Gregor Levin, Shubiao Wu, and Simon Stisen
Biogeosciences, 20, 2387–2403, https://doi.org/10.5194/bg-20-2387-2023, https://doi.org/10.5194/bg-20-2387-2023, 2023
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Utilizing peatlands for agriculture leads to large emissions of greenhouse gases worldwide. The emissions are triggered by lowering the water table, which is a necessary step in order to make peatlands arable. Many countries aim at reducing their emissions by restoring peatlands, which can be achieved by stopping agricultural activities and thereby raising the water table. We estimate a total emission of 2.6 Mt CO2-eq for organic-rich peatlands in Denmark and a potential reduction of 77 %.
Mélissa Laurent, Matthias Fuchs, Tanja Herbst, Alexandra Runge, Susanne Liebner, and Claire C. Treat
Biogeosciences, 20, 2049–2064, https://doi.org/10.5194/bg-20-2049-2023, https://doi.org/10.5194/bg-20-2049-2023, 2023
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In this study we investigated the effect of different parameters (temperature, landscape position) on the production of greenhouse gases during a 1-year permafrost thaw experiment. For very similar carbon and nitrogen contents, our results show a strong heterogeneity in CH4 production, as well as in microbial abundance. According to our study, these differences are mainly due to the landscape position and the hydrological conditions established as a result of the topography.
Michael Moubarak, Seeta Sistla, Stefano Potter, Susan M. Natali, and Brendan M. Rogers
Biogeosciences, 20, 1537–1557, https://doi.org/10.5194/bg-20-1537-2023, https://doi.org/10.5194/bg-20-1537-2023, 2023
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Tundra wildfires are increasing in frequency and severity with climate change. We show using a combination of field measurements and computational modeling that tundra wildfires result in a positive feedback to climate change by emitting significant amounts of long-lived greenhouse gasses. With these effects, attention to tundra fires is necessary for mitigating climate change.
Hanna I. Campen, Damian L. Arévalo-Martínez, and Hermann W. Bange
Biogeosciences, 20, 1371–1379, https://doi.org/10.5194/bg-20-1371-2023, https://doi.org/10.5194/bg-20-1371-2023, 2023
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Carbon monoxide (CO) is a climate-relevant trace gas emitted from the ocean. However, oceanic CO cycling is understudied. Results from incubation experiments conducted in the Fram Strait (Arctic Ocean) indicated that (i) pH did not affect CO cycling and (ii) enhanced CO production and consumption were positively correlated with coloured dissolved organic matter and nitrate concentrations. This suggests microbial CO uptake to be the driving factor for CO cycling in the Arctic Ocean.
Yihong Zhu, Ruihua Liu, Huai Zhang, Shaoda Liu, Zhengfeng Zhang, Fei-Hai Yu, and Timothy G. Gregoire
Biogeosciences, 20, 1357–1370, https://doi.org/10.5194/bg-20-1357-2023, https://doi.org/10.5194/bg-20-1357-2023, 2023
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With global warming, the risk of flooding is rising, but the response of the carbon cycle of aquatic and associated riparian systems
to flooding is still unclear. Based on the data collected in the Lijiang, we found that flooding would lead to significant carbon emissions of fluvial areas and riparian areas during flooding, but carbon capture may happen after flooding. In the riparian areas, the surviving vegetation, especially clonal plants, played a vital role in this transformation.
Lauri Heiskanen, Juha-Pekka Tuovinen, Henriikka Vekuri, Aleksi Räsänen, Tarmo Virtanen, Sari Juutinen, Annalea Lohila, Juha Mikola, and Mika Aurela
Biogeosciences, 20, 545–572, https://doi.org/10.5194/bg-20-545-2023, https://doi.org/10.5194/bg-20-545-2023, 2023
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We measured and modelled the CO2 and CH4 fluxes of the terrestrial and aquatic ecosystems of the subarctic landscape for 2 years. The landscape was an annual CO2 sink and a CH4 source. The forest had the largest contribution to the landscape-level CO2 sink and the peatland to the CH4 emissions. The lakes released 24 % of the annual net C uptake of the landscape back to the atmosphere. The C fluxes were affected most by the rainy peak growing season of 2017 and the drought event in July 2018.
Artem G. Lim, Ivan V. Krickov, Sergey N. Vorobyev, Mikhail A. Korets, Sergey Kopysov, Liudmila S. Shirokova, Jan Karlsson, and Oleg S. Pokrovsky
Biogeosciences, 19, 5859–5877, https://doi.org/10.5194/bg-19-5859-2022, https://doi.org/10.5194/bg-19-5859-2022, 2022
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In order to quantify C transport and emission and main environmental factors controlling the C cycle in Siberian rivers, we investigated the largest tributary of the Ob River, the Ket River basin, by measuring spatial and seasonal variations in carbon CO2 and CH4 concentrations and emissions together with hydrochemical analyses. The obtained results are useful for large-scale modeling of C emission and export fluxes from permafrost-free boreal rivers of an underrepresented region of the world.
Robert J. Parker, Chris Wilson, Edward Comyn-Platt, Garry Hayman, Toby R. Marthews, A. Anthony Bloom, Mark F. Lunt, Nicola Gedney, Simon J. Dadson, Joe McNorton, Neil Humpage, Hartmut Boesch, Martyn P. Chipperfield, Paul I. Palmer, and Dai Yamazaki
Biogeosciences, 19, 5779–5805, https://doi.org/10.5194/bg-19-5779-2022, https://doi.org/10.5194/bg-19-5779-2022, 2022
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Wetlands are the largest natural source of methane, one of the most important climate gases. The JULES land surface model simulates these emissions. We use satellite data to evaluate how well JULES reproduces the methane seasonal cycle over different tropical wetlands. It performs well for most regions; however, it struggles for some African wetlands influenced heavily by river flooding. We explain the reasons for these deficiencies and highlight how future development will improve these areas.
Saúl Edgardo Martínez Castellón, José Henrique Cattanio, José Francisco Berrêdo, Marcelo Rollnic, Maria de Lourdes Ruivo, and Carlos Noriega
Biogeosciences, 19, 5483–5497, https://doi.org/10.5194/bg-19-5483-2022, https://doi.org/10.5194/bg-19-5483-2022, 2022
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We seek to understand the influence of climatic seasonality and microtopography on CO2 and CH4 fluxes in an Amazonian mangrove. Topography and seasonality had a contrasting influence when comparing the two gas fluxes: CO2 fluxes were greater in high topography in the dry period, and CH4 fluxes were greater in the rainy season in low topography. Only CO2 fluxes were correlated with soil organic matter, the proportion of carbon and nitrogen, and redox potential.
Matthias Koschorreck, Klaus Holger Knorr, and Lelaina Teichert
Biogeosciences, 19, 5221–5236, https://doi.org/10.5194/bg-19-5221-2022, https://doi.org/10.5194/bg-19-5221-2022, 2022
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At low water levels, parts of the bottom of rivers fall dry. These beaches or mudflats emit the greenhouse gas carbon dioxide (CO2) to the atmosphere. We found that those emissions are caused by microbial reactions in the sediment and that they change with time. Emissions were influenced by many factors like temperature, water level, rain, plants, and light.
Wantong Zhang, Zhengyi Hu, Joachim Audet, Thomas A. Davidson, Enze Kang, Xiaoming Kang, Yong Li, Xiaodong Zhang, and Jinzhi Wang
Biogeosciences, 19, 5187–5197, https://doi.org/10.5194/bg-19-5187-2022, https://doi.org/10.5194/bg-19-5187-2022, 2022
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This work focused on the CH4 and N2O emissions from alpine peatlands in response to the interactive effects of altered water table levels and increased nitrogen deposition. Across the 2-year mesocosm experiment, nitrogen deposition showed nonlinear effects on CH4 emissions and linear effects on N2O emissions, and these N effects were associated with the water table levels. Our results imply the future scenario of strengthened CH4 and N2O emissions from an alpine peatland.
Karel Castro-Morales, Anna Canning, Sophie Arzberger, Will A. Overholt, Kirsten Küsel, Olaf Kolle, Mathias Göckede, Nikita Zimov, and Arne Körtzinger
Biogeosciences, 19, 5059–5077, https://doi.org/10.5194/bg-19-5059-2022, https://doi.org/10.5194/bg-19-5059-2022, 2022
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Permafrost thaw releases methane that can be emitted into the atmosphere or transported by Arctic rivers. Methane measurements are lacking in large Arctic river regions. In the Kolyma River (northeast Siberia), we measured dissolved methane to map its distribution with great spatial detail. The river’s edge and river junctions had the highest methane concentrations compared to other river areas. Microbial communities in the river showed that the river’s methane likely is from the adjacent land.
Sonja Gindorf, Hermann W. Bange, Dennis Booge, and Annette Kock
Biogeosciences, 19, 4993–5006, https://doi.org/10.5194/bg-19-4993-2022, https://doi.org/10.5194/bg-19-4993-2022, 2022
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Methane is a climate-relevant greenhouse gas which is emitted to the atmosphere from coastal areas such as the Baltic Sea. We measured the methane concentration in the water column of the western Kiel Bight. Methane concentrations were higher in September than in June. We found no relationship between the 2018 European heatwave and methane concentrations. Our results show that the methane distribution in the water column is strongly affected by temporal and spatial variabilities.
Margaret Capooci and Rodrigo Vargas
Biogeosciences, 19, 4655–4670, https://doi.org/10.5194/bg-19-4655-2022, https://doi.org/10.5194/bg-19-4655-2022, 2022
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Tidal salt marsh soil emits greenhouse gases, as well as sulfur-based gases, which play roles in global climate but are not well studied as they are difficult to measure. Traditional methods of measuring these gases worked relatively well for carbon dioxide, but less so for methane, nitrous oxide, carbon disulfide, and dimethylsulfide. High variability of trace gases complicates the ability to accurately calculate gas budgets and new approaches are needed for monitoring protocols.
Janne Rinne, Patryk Łakomiec, Patrik Vestin, Joel D. White, Per Weslien, Julia Kelly, Natascha Kljun, Lena Ström, and Leif Klemedtsson
Biogeosciences, 19, 4331–4349, https://doi.org/10.5194/bg-19-4331-2022, https://doi.org/10.5194/bg-19-4331-2022, 2022
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The study uses the stable isotope 13C of carbon in methane to investigate the origins of spatial and temporal variation in methane emitted by a temperate wetland ecosystem. The results indicate that methane production is more important for spatial variation than methane consumption by micro-organisms. Temporal variation on a seasonal timescale is most likely affected by more than one driver simultaneously.
Kukka-Maaria Kohonen, Roderick Dewar, Gianluca Tramontana, Aleksanteri Mauranen, Pasi Kolari, Linda M. J. Kooijmans, Dario Papale, Timo Vesala, and Ivan Mammarella
Biogeosciences, 19, 4067–4088, https://doi.org/10.5194/bg-19-4067-2022, https://doi.org/10.5194/bg-19-4067-2022, 2022
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Four different methods for quantifying photosynthesis (GPP) at ecosystem scale were tested, of which two are based on carbon dioxide (CO2) and two on carbonyl sulfide (COS) flux measurements. CO2-based methods are traditional partitioning, and a new method uses machine learning. We introduce a novel method for calculating GPP from COS fluxes, with potentially better applicability than the former methods. Both COS-based methods gave on average higher GPP estimates than the CO2-based estimates.
Lutz Beckebanze, Benjamin R. K. Runkle, Josefine Walz, Christian Wille, David Holl, Manuel Helbig, Julia Boike, Torsten Sachs, and Lars Kutzbach
Biogeosciences, 19, 3863–3876, https://doi.org/10.5194/bg-19-3863-2022, https://doi.org/10.5194/bg-19-3863-2022, 2022
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In this study, we present observations of lateral and vertical carbon fluxes from a permafrost-affected study site in the Russian Arctic. From this dataset we estimate the net ecosystem carbon balance for this study site. We show that lateral carbon export has a low impact on the net ecosystem carbon balance during the complete study period (3 months). Nevertheless, our results also show that lateral carbon export can exceed vertical carbon uptake at the beginning of the growing season.
Cited articles
Althoff, F., Benzing, K., Comba, P., McRoberts, C., Boyd, D. R., Greiner, S.,
and Keppler, F.: Abiotic methanogenesis from organosulphur compounds under
ambient conditions, Nat. Commun., 5, 4205, https://doi.org/10.1038/ncomms5205, 2014.
Álvarez-Salgado, X. A. and Miller, A. E. J.: Simultaneous determination
of dissolved organic carbon and total dissolved nitrogen in seawater by high
temperature catalytic oxidation: conditions for precise shipboard
measurements, Mar. Chem., 62, 325–333,
https://doi.org/10.1016/S0304-4203(98)00037-1, 1998.
American Public Health Association (APHA): Standard methods for the examination of water and wastewater. 1992, 18th ed., edited by: Greenberg, A. E., Clesceri, L. S., and Eaton, A. D., American Public Health Association, Washington, DC, USA., 1100 pp., 1992.
Angel, R., Matthies, D., and Conrad, R.: Activation of Methanogenesis in Arid
Biological Soil Crusts Despite the Presence of Oxygen, PLOS ONE, 6,
e20453, https://doi.org/10.1371/journal.pone.0020453, 2011.
Angle, J. C., Morin, T. H., Solden, L. M., Narrowe, A. B., Smith, G. J.,
Borton, M. A., Rey-Sanchez, C., Daly, R. A., Mirfenderesgi, G., Hoyt, D. W.,
Riley, W. J., Miller, C. S., Bohrer, G., and Wrighton, K. C.: Methanogenesis
in oxygenated soils is a substantial fraction of wetland methane emissions,
Nat. Commun., 8, 1–9, https://doi.org/10.1038/s41467-017-01753-4, 2017.
Aronow, S.: Shoreline development ratio, in Beaches and Coastal Geology,
Springer US, Boston, MA, 754–755, 1982.
Axler, R. P., Rose, C., and Tikkanen, C. A.: Phytoplankton Nutrient
Deficiency as Related to Atmospheric Nitrogen Deposition in Northern
Minnesota Acid-Sensitive Lakes, Can. J. Fish. Aquat. Sci., 51,
1281–1296, https://doi.org/10.1139/f94-128, 1994.
Bastviken, D., Cole, J., Pace, M., and Tranvik, L.: Methane emissions from
lakes: Dependence of lake characteristics, two regional assessments, and a
global estimate, Glob. Biogeochem. Cy., 18, 1–12,
https://doi.org/10.1029/2004GB002238, 2004.
Bastviken, D., Tranvik, L. J., Downing, J. A., Crill, P. M., and
Enrich-Prast, A.: Freshwater Methane Emissions Offset the Continental Carbon
Sink, Science, 331, 1–12, https://doi.org/10.1126/science.1196808, 2011.
Beaulieu, J. J., DelSontro, T., and Downing, J. A.: Eutrophication will
increase methane emissions from lakes and impoundments during the 21st
century, Nat. Commun., 10, 1375, https://doi.org/10.1038/s41467-019-09100-5, 2019.
Berg, A., Lindblad, P., and Svensson, B. H.: Cyanobacteria as a source of
hydrogen for methane formation, World J. Microbiol. Biotechnol., 30,
539–545, https://doi.org/10.1007/s11274-013-1463-5, 2014.
Berg, I. A.: Ecological Aspects of the Distribution of Different Autotrophic
CO2 Fixation Pathways, Appl. Environ. Microbiol., 77, 1925–1936,
https://doi.org/10.1128/AEM.02473-10, 2011.
Beversdorf, L. J., White, A. E., Björkman, K. M., Letelier, R. M., and
Karl, D. M.: Phosphonate metabolism by Trichodesmium IMS101 and the
production of greenhouse gases, Limnol. Oceanogr., 55, 1768–1778,
https://doi.org/10.4319/lo.2010.55.4.1768, 2010.
Bižić, M., Klintzsch, T., Ionescu, D., Hindiyeh, M. Y., Günthel,
M., Muro-Pastor, A. M., Eckert, W., Urich, T., Keppler, F., and Grossart,
H.-P.: Aquatic and terrestrial cyanobacteria produce methane, Sci.
Adv., 6: eaax5343, https://doi.org/10.1126/sciadv.aax5343, 2020.
Bižić-Ionescu, M., Ionescu, D., Günthel, M., Tang, K. W., and
Grossart, H. P.: Oxic methane cycling: New evidence for methane
formation in Oxic lake water, in: Biogenesis of Hydrocarbons, edited by: Stams, A. J. M. and Souna, D. Z., Springer International Publishing, Basel, 1–22, 2018.
Blees, J., Niemann, H., Erne, M., Zopfi, J., Schubert, C. J., and Lehmann, M.
F.: Spatial variations in surface water methane super-saturation and
emission in Lake Lugano, southern Switzerland, Aquat. Sci., 77, 535–545,
https://doi.org/10.1007/s00027-015-0401-z, 2015.
Bogard, M. J., del Giorgio, P. A., Boutet, L., Chaves, M. C. G., Prairie, Y.
T., Merante, A., and Derry, A. M.: Oxic water column methanogenesis as a
major component of aquatic CH4 fluxes, Nat. Commun., 5, 5350,
https://doi.org/10.1038/ncomms6350, 2014.
Boström, K. H., Simu, K., Hagström, Å., and Riemann, L.:
Optimization of DNA extraction for quantitative marine bacterioplankton
community analysis, Limnol. Oceanogr. Method., 2, 365–373,
https://doi.org/10.4319/lom.2004.2.365, 2004.
Burns, B. D. and Beardall, J.: Utilization of inorganic carbon by marine
microalgae, J. Exp. Mar. Biol. Ecol., 107, 75–86,
https://doi.org/10.1016/0022-0981(87)90125-0, 1987.
Carini, P., White, A. E., Campbell, E. O., and Giovannoni, S. J.: Methane
production by phosphate-starved SAR11 chemoheterotrophic marine bacteria,
Nat. Commun., 5, 4346, https://doi.org/10.1038/ncomms5346, 2014.
Cellamare, M., Rolland, A., and Jacquet, S.: Flow cytometry sorting of
freshwater phytoplankton, J. Appl. Phycol., 22, 87–100,
https://doi.org/10.1007/s10811-009-9439-4, 2010.
Chistoserdova, L., Vorholt, J. A., Thauer, R. K., and Lidstrom, M. E.: C1
Transfer Enzymes and Coenzymes Linking Methylotrophic Bacteria and
Methanogenic Archaea, Science, 281, 99–102,
https://doi.org/10.1126/science.281.5373.99, 1998.
Cole, J. J., Pace, M. L., Carpenter, S. R., and Kitchell, J. F.: Persistence
of net heterotrophy in lakes during nutrient addition and food web
manipulations, Limnol. Oceanogr., 45, 1718–1730,
https://doi.org/10.4319/lo.2000.45.8.1718, 2000.
Collier, J. L.: Flow Cytometry and the Single Cell in Phycology, J. Appl.
Phycol., 36, 628–644, https://doi.org/10.1046/j.1529-8817.2000.99215.x, 2000.
Corzo, A., Jimenez-Gomez, F., Gordillo, F., Garcia-Ruiz, R., and Niell, F.:
Synechococcus and Prochlorococcus-like populations detected by flow
cytometry in a eutrophic reservoir in summer, J. Plankton Res., 21,
1575–1581, https://doi.org/10.1093/plankt/21.8.1575, 1999.
Crowe, S. A., O'Neill, A. H., Katsev, S., Hehanussa, P., Haffner, G. D.,
Sundby, B., Mucci, A., and Fowle, D. A.: The biogeochemistry of tropical
lakes: A case study from Lake Matano, Indonesia, Limnol. Oceanogr., 53,
319–331, https://doi.org/10.4319/lo.2008.53.1.0319, 2008.
Damm, E., Kiene, R. P., Schwarz, J., Falck, E., and Dieckmann, G.: Methane
cycling in Arctic shelf water and its relationship with phytoplankton
biomass and DMSP, Mar. Chem., 109, 45–59,
https://doi.org/10.1016/j.marchem.2007.12.003, 2008.
Damm, E., Helmke, E., Thoms, S., Schauer, U., Nöthig, E., Bakker, K., and
Kiene, R. P.: Methane production in aerobic oligotrophic surface water in
the central Arctic Ocean, Biogeosciences, 7, 1099–1108,
https://doi.org/10.5194/bg-7-1099-2010, 2010.
Damm, E., Thoms, S., Beszczynska-Möller, A., Nöthig, E. M., and
Kattner, G.: Methane excess production in oxygen-rich polar water and a
model of cellular conditions for this paradox, Polar Sci., 9, 327–334,
https://doi.org/10.1016/j.polar.2015.05.001, 2015.
de Angelis, M. A. and Lee, C.: Methane production during zooplankton grazing
on marine phytoplankton, Limnol. Oceanogr., 39, 1298–1308,
https://doi.org/10.4319/lo.1994.39.6.1298, 1994.
Deemer, B. R., Harrison, J. A., Li, S., Beaulieu, J. J., DelSontro, T.,
Barros, N., Bezerra-Neto, J. F., Powers, S. M., dos Santos, M. A., and Vonk,
J. A.: Greenhouse Gas Emissions from Reservoir Water Surfaces: A New Global
Synthesis, BioScience, 66, 949–964, https://doi.org/10.1093/biosci/biw117, 2016.
DelSontro, T., del Giorgio, P. A., and Prairie, Y. T.: No Longer a Paradox:
The Interaction Between Physical Transport and Biological Processes Explains
the Spatial Distribution of Surface Water Methane Within and Across Lakes,
Ecosystems, 21, 1073–1087, https://doi.org/10.1007/s10021-017-0205-1, 2018.
del Valle, D. A. and Karl, D. M.: Aerobic production of methane from
dissolved water-column methylphosphonate and sinking particles in the North
Pacific Subtropical Gyre, Aquat. Microb. Ecol., 73, 93–105,
https://doi.org/10.3354/ame01714, 2014.
Dlugokencky, E. J.: Trends in Atmospheric Methane. Globally averaged marine
surface monthly mean data, NOAA/ESRL, available at:
https://www.esrl.noaa.gov/gmd/ccgg/trends_ch4/, last access: 29 July 2019.
Donis, D., Flury, S., Stöckli, A., Spangenberg, J. E., Vachon, D., and
McGinnis, D. F.: Full-scale evaluation of methane production under oxic
conditions in a mesotrophic lake, Nat. Commun., 8, 1661,
https://doi.org/10.1038/s41467-017-01648-4, 2017.
Edvardsen, B. and Paasche, E.: Bloom dynamics and physiology of Prymnesium
and Chrysochromulina, Nato Asi. Ser. G. Ecol. Sci., 41, 193–208,
1998.
Encinas Fernández, J., Peeters, F., and Hofmann, H.: On the methane
paradox: Transport from shallow water zones rather than in situ
methanogenesis is the major source of CH4 in the open surface water of
lakes, JGR: Biogeosciences, 121, 2717–2726, https://doi.org/10.1002/2016JG003586,
2016.
Fox, A., Kwapinski, W., Griffiths, B. S., and Schmalenberger, A.: The role of
sulfur- and phosphorus-mobilizing bacteria in biochar-induced growth
promotion of Lolium perenne, FEMS Microbiol. Ecol., 90, 78–91,
https://doi.org/10.1111/1574-6941.12374, 2014.
Fox, J. and Weisberg, S.: An R Companion to Applied Regression, Second.,
Sage, Thousand Oaks CA, available at:
http://socserv.socsci.mcmaster.ca/jfox/Books/Companion (last access: 3 June 2018), 2011.
Gasol, J. M. and del Giorgio, P. A.: Using flow cytometry for counting
natural planktonic bacteria and understanding the structure of planktonic
bacterial communities, Sci. Mar., 64, 197–224,
https://doi.org/10.3989/scimar.2000.64n2197, 2000.
Gomez-Garcia, M. R., Davison, M., Blain-Hartnung, M., Grossman, A. R., and
Bhaya, D.: Alternative pathways for phosphonate metabolism in thermophilic
cyanobacteria from microbial mats, ISME J., 5, 141–149,
https://doi.org/10.1038/ismej.2010.96, 2011.
Grabarse, W., Mahlert, F., Duin, E. C., Goubeaud, M., Shima, S., Thauer, R.
K., Lamzin, V., and Ermler, U.: On the mechanism of biological methane
formation: structural evidence for conformational changes in methyl-coenzyme
M reductase upon substrate binding, J. Mol. Biol., 309, 315–330,
https://doi.org/10.1006/jmbi.2001.4647, 2001.
Gross, J. and Ligges, U.: nortest: Tests for Normality, available
at: https://CRAN.R-project.org/package=nortest (last access: 3 June 2018),
2015.
Grossart, H.-P., Frindte, K., Dziallas, C., Eckert, W., and Tang, K. W.:
Microbial methane production in oxygenated water column of an oligotrophic
lake, P. Natl. Acad. Sci. USA, 108, 19657–19661, https://doi.org/10.1073/pnas.1110716108, 2011.
Günthel, M., Donis, D., Kirillin, G., Ionescu, D., Bizic, M., McGinnis,
D. F., Grossart, H.-P., and Tang, K. W.: Contribution of oxic methane
production to surface methane emission in lakes and its global importance,
Nat. Commun., 10, 1–10, https://doi.org/10.1038/s41467-019-13320-0, 2019.
Hartmann, J. F., Günthel, M., Klintzsch, T., Kirillin, G., Grossart,
H.-P., Keppler, F., and Isenbeck-Schröter, M.: High Spatiotemporal
Dynamics of Methane Production and Emission in Oxic Surface Water, Environ.
Sci. Technol., 54, 1451–1463, https://doi.org/10.1021/acs.est.9b03182, 2020.
Hastie, T. and Tibshirani, R.: Generalized Additive Models, Statist. Sci.,
1, 297–310, https://doi.org/10.1214/ss/1177013604, 1986.
Hastie, T. and Tibshirani, R. J.: Generalized additive models, London,
Chapman and Hall, 335 pp., 1990.
Hofmann, H., Federwisch, L., and Peeters, F.: Wave-induced release of
methane: Littoral zones as source of methane in lakes, Limnol.
Oceanogr., 55, 1990–2000, https://doi.org/10.4319/lo.2010.55.5.1990, 2010.
Jähne, B., Münnich, K. O., Bösinger, R., Dutzi, A., Huber, W.,
and Libner, P.: On the parameters influencing air-water gas exchange, J.
Geophys. Res.-Ocean., 92, 1937–1949, https://doi.org/10.1029/JC092iC02p01937, 1987.
Jarrell, K. F.: Extreme Oxygen Sensitivity in Methanogenic Archaebacteria,
BioScience, 35, 298–302, https://doi.org/10.2307/1309929, 1985.
Karl, D. M. and Tilbrook, B. D.: Production and transport of methane in
oceanic particulate organic matter, Nature, 368, 732–734,
https://doi.org/10.1038/368732a0, 1994.
Karl, D. M., Beversdorf, L., Björkman, K. M., Church, M. J., Martinez,
A., and Delong, E. F.: Aerobic production of methane in the sea, Nat.
Geosci., 1, 473–478, https://doi.org/10.1038/ngeo234, 2008.
Khatun, S., Iwata, T., Kojima, H., Fukui, M., Aoki, T., Mochizuki, S.,
Naito, A., Kobayashi, A., and Uzawa, R.: Aerobic methane production by
planktonic microbes in lakes, Sci. Total Environ., 696, 133916,
https://doi.org/10.1016/j.scitotenv.2019.133916, 2019.
Khatun, S., Iwata, T., Kojima, H., Ikarashi, Y., Yamanami, K., Imazawa, D.,
Kenta, T., Shinohara, R., and Saito, H.: Linking Stoichiometric Organic
Carbon–Nitrogen Relationships to planktonic Cyanobacteria and Subsurface
Methane Maximum in Deep Freshwater Lakes, Water, 12, 402,
https://doi.org/10.3390/w12020402, 2020.
Kiene, R. P.: Production and consumption of methane in aquatic systems, in Microbial Production and Consumption of Greenhouse Gases: Methane, Nitrogen Oxides, and Halomethanes, edited by: Rogers, J. E. and Whitman, W. B., American Society for Microbiology, Washington, DC, USA, 111–146, 1991.
Klintzsch, T., Langer, G., Nehrke, G., Wieland, A., Lenhart, K., and Keppler, F.: Methane production by three widespread marine phytoplankton species: release rates, precursor compounds, and potential relevance for the environment, Biogeosciences, 16, 4129–4144, https://doi.org/10.5194/bg-16-4129-2019, 2019.
Lenhart, K., Bunge, M., Ratering, S., Neu, T. R., Schüttmann, I.,
Greule, M., Kammann, C., Schnell, S., Müller, C., Zorn, H., and Keppler,
F.: Evidence for methane production by saprotrophic fungi, Nat. Commun., 3,
1046, https://doi.org/10.1038/ncomms2049, 2012.
Lenhart, K., Althoff, F., Greule, M., and Keppler, F.: Technical Note:
Methionine, a precursor of methane in living plants, Biogeosciences, 12,
1907–1914, https://doi.org/10.5194/bg-12-1907-2015, 2015.
Lenhart, K., Klintzsch, T., Langer, G., Nehrke, G., Bunge, M., Schnell, S.,
and Keppler, F.: Evidence for methane production by the marine algae
Emiliania huxleyi, Biogeosciences, 13, 3163–3174,
https://doi.org/10.5194/bg-13-3163-2016, 2016.
León-Palmero, E., Reche, I., and Morales-Baquero, R.: Atenuación de
luz en embalses del sur-este de la Península Ibérica,
Ingeniería del agua, 23, 65–75, https://doi.org/10.4995/ia.2019.10655, 2019.
León-Palmero, E., Morales-Baquero, R., and Reche, I.: Greenhouse gas
fluxes from reservoirs determined by watershed lithology, morphometry, and
anthropogenic pressure, Environ. Res. Lett., 15, 044012,
https://doi.org/10.1088/1748-9326/ab7467, 2020.
Liu, H., Jing, H., Wong, T. H. C., and Chen, B.: Co-occurrence of
phycocyanin- and phycoerythrin-rich Synechococcus in subtropical estuarine
and coastal waters of Hong Kong, Environ. Microbiol. Rep., 6, 90–99,
https://doi.org/10.1111/1758-2229.12111, 2014.
Marotta, H., Pinho, L., Gudasz, C., Bastviken, D., Tranvik, L. J., and
Enrich-Prast, A.: Greenhouse gas production in low-latitude lake sediments
responds strongly to warming, Nat. Clim. Change, 4, 467–470,
https://doi.org/10.1038/nclimate2222, 2014.
Michmerhuizen, C. M., Striegl, R. G., and McDonald, M. E.: Potential methane
emission from north-temperate lakes following ice melt, Limnol. Oceanogr.,
41, 985–991, https://doi.org/10.4319/lo.1996.41.5.0985, 1996.
Mitsch, W. J., Bernal, B., Nahlik, A. M., Mander, Ü., Zhang, L.,
Anderson, C. J., Jørgensen, S. E., and Brix, H.: Wetlands, carbon, and
climate change, Landsc. Ecol., 28, 583–597,
https://doi.org/10.1007/s10980-012-9758-8, 2012.
Morris, D. P. and Lewis, W. M.: Phytoplankton nutrient limitation in
Colorado mountain lakes, Freshw. Biol., 20, 315–327,
https://doi.org/10.1111/j.1365-2427.1988.tb00457.x, 1988.
Mortimer, C. H.: The oxygen content of air-saturated fresh waters, and aids
in calculating percentage saturation, Schweizerbart Science Publishers,
Stuttgart, Germany, available at:
http://www.schweizerbart.de//publications/detail/isbn/9783510520060/Mitteilungen_IVL_Nr_6 (last access: 25 November 2017), 1956.
Murase, J. and Sugimoto, A.: Inhibitory effect of light on methane oxidation
in the pelagic water column of a mesotrophic lake (Lake Biwa, Japan),
Limnol. Oceanogr., 50, 1339–1343,
https://doi.org/10.4319/lo.2005.50.4.1339, 2005.
Murase, J., Sakai, Y., Sugimoto, A., Okubo, K., and Sakamoto, M.: Sources of
dissolved methane in Lake Biwa, Limnology, 4, 91–99,
https://doi.org/10.1007/s10201-003-0095-0, 2003.
Murphy, J. and Riley, J. P.: A modified single solution method for the
determination of phosphate in natural waters, Anal. Chim. Acta,
27, 31–36, https://doi.org/10.1016/S0003-2670(00)88444-5, 1962.
Musenze, R. S., Grinham, A., Werner, U., Gale, D., Sturm, K., Udy, J., and
Yuan, Z.: Assessing the spatial and temporal variability of diffusive
methane and nitrous oxide emissions from subtropical freshwater reservoirs,
Environ. Sci. Technol., 48, 14499–14507, https://doi.org/10.1021/es505324h, 2014.
Naqvi, S. W. A., Lam, P., Narvenkar, G., Sarkar, A., Naik, H., Pratihary,
A., Shenoy, D. M., Gauns, M., Kurian, S., Damare, S., Duret, M., Lavik, G.,
and Kuypers, M. M. M.: Methane stimulates massive nitrogen loss from
freshwater reservoirs in India, Nat. Commun., 9, 1–10,
https://doi.org/10.1038/s41467-018-03607-z, 2018.
Odum, H. T.: Primary Production in Flowing Waters, Limnol. Oceanogr., 1,
102–117, https://doi.org/10.4319/lo.1956.1.2.0102, 1956.
Okuku, E. O., Bouillon, S., Tole, M., and Borges, A. V.: Diffusive emissions
of methane and nitrous oxide from a cascade of tropical hydropower
reservoirs in Kenya, Lakes Reserv. Res. Manag., 24,
127–135, https://doi.org/10.1111/lre.12264, 2019.
Oswald, K., Milucka, J., Brand, A., Littmann, S., Wehrli, B., Kuypers, M. M. M., and Schubert, C. J.: Light-Dependent Aerobic Methane Oxidation Reduces Methane Emissions from Seasonally Stratified Lakes, PLoS One, 10, e0132574–e0132574, doi:10.1371/journal.pone.0132574, 2015.
Oswald, K., Jegge, C., Tischer, J., Berg, J., Brand, A., Miracle, M. R.,
Soria, X., Vicente, E., Lehmann, M. F., Zopfi, J., and Schubert, C. J.:
Methanotrophy under Versatile Conditions in the Water Column of the
Ferruginous Meromictic Lake La Cruz (Spain), Front. Microbiol., 7, 1762 pp.,
https://doi.org/10.3389/fmicb.2016.01762, 2016.
Owens, N. J. P., Law, C. S., Mantoura, R. F. C., Burkill, P. H., and
Llewellyn, C. A.: Methane flux to the atmosphere from the Arabian Sea,
Nature, 354, 293–296, https://doi.org/10.1038/354293a0, 1991.
Peeters, F., Wüest, A., Piepke, G., and Imboden, D. M.: Horizontal mixing
in lakes, J. Geophys. Res.-Ocean., 101, 18361–18375,
https://doi.org/10.1029/96JC01145, 1996.
Peeters, F., Fernandez Encinas, J., and Hofmann, H.: Sediment fluxes rather
than oxic methanogenesis explain diffusive CH4 emissions from lakes and
reservoirs, Sci. Rep., 9, 1–10, https://doi.org/10.1038/s41598-018-36530-w, 2019.
R Core Team: R: A Language and Environment for Statistical Computing, R
Foundation for Statistical Computing, Vienna, Austria, available
at: http://www.R-project.org/, (last access: 20 February 2020) 2014.
Rasilo, T., Prairie, Y. T., and del Giorgio, P. A.: Large-scale patterns in
summer diffusive CH4 fluxes across boreal lakes, and contribution to
diffusive C emissions, Glob. Change Biol., 21, 1124–1139,
https://doi.org/10.1111/gcb.12741, 2015.
Repeta, D. J., Ferrón, S., Sosa, O. A., Johnson, C. G., Repeta, L. D.,
Acker, M., DeLong, E. F., and Karl, D. M.: Marine methane paradox explained
by bacterial degradation of dissolved organic matter, Nat. Geosci., 9,
884–887, https://doi.org/10.1038/ngeo2837, 2016.
Reynolds, C. S.: Phytoplankton periodicity: the interactions of form,
function and environmental variability, Freshw. Biol., 14, 111–142,
https://doi.org/10.1111/j.1365-2427.1984.tb00027.x, 1984.
Roland, F. A. E., Darchambeau, F., Morana, C., and Borges, A. V.: Nitrous
oxide and methane seasonal variability in the epilimnion of a large tropical
meromictic lake (Lake Kivu, East-Africa), Aquat. Sci., 79, 209–218,
https://doi.org/10.1007/s00027-016-0491-2, 2017.
Rudd, J. W. M. and Hamilton, R. D.: Methane cycling in a eutrophic shield
lake and its effects on whole lake metabolism, Limnol. Oceanogr., 23,
337–348, https://doi.org/10.4319/lo.1978.23.2.0337, 1978.
Sabo, E., Roy, D., Hamilton, P. B., Hehanussa, P. E., McNeely, R., and
Haffner, G. D.: The plankton community of Lake Matano: factors regulating
plankton composition and relative abundance in an ancient, tropical lake of
Indonesia, in: Patterns and Processes of Speciation in Ancient Lakes,
Springer, 225–235, 2008.
Schlesinger, W. H. and Bernhardt, E. S.: Biogeochemistry: An Analysis of
Global Change, Academic Press, 689 pp., 2013.
Schmale, O., Wäge, J., Mohrholz, V., Wasmund, N., Gräwe, U., Rehder,
G., Labrenz, M., and Loick-Wilde, N.: The contribution of zooplankton to
methane supersaturation in the oxygenated upper waters of the central Baltic
Sea, Limnol. Oceanogr., 63, 412–430, https://doi.org/10.1002/lno.10640, 2018.
Schmidt, U. and Conrad, R.: Hydrogen, carbon monoxide, and methane dynamics
in Lake Constance, Limnol. Oceanogr., 38, 1214–1226,
https://doi.org/10.4319/lo.1993.38.6.1214, 1993.
Schubert, C. J. and Wehrli, B.: Contribution of Methane Formation and
Methane Oxidation to Methane Emission from Freshwater Systems, in: Biogenesis
of Hydrocarbons, edited by: Stams, A. J. M. and Sousa, D., Springer
International Publishing, Cham., 1–31, 2018.
Schulz, M., Faber, E., Hollerbach, A., Schröder, H. G., and Güde, H.:
The methane cycle in the epilimnion of Lake Constance, Archiv
Hydrobiol., 157–176, https://doi.org/10.1127/archiv-hydrobiol/151/2001/157, 2001.
Schwarz, J. I. K., Eckert, W., and Conrad, R.: Response of the methanogenic
microbial community of a profundal lake sediment (Lake Kinneret, Israel) to
algal deposition, Limnol. Oceanogr., 53, 113–121,
https://doi.org/10.4319/lo.2008.53.1.0113, 2008.
Scranton, M. I. and Brewer, P. G.: Occurrence of methane in the near-surface
waters of the western subtropical North-Atlantic, Deep-Sea Res., 24,
127–138, https://doi.org/10.1016/0146-6291(77)90548-3, 1977.
Segers, R.: Methane production and methane consumption: a review of
processes underlying wetland methane fluxes, Biogeochemistry, 41, 23–51,
https://doi.org/10.1023/A:1005929032764, 1998.
Sepulveda-Jauregui, A., Hoyos-Santillan, J., Martinez-Cruz, K., Walter
Anthony, K. M., Casper, P., Belmonte-Izquierdo, Y., and Thalasso, F.:
Eutrophication exacerbates the impact of climate warming on lake methane
emission, Sci. Total Environ., 636, 411–419,
https://doi.org/10.1016/j.scitotenv.2018.04.283, 2018.
Seweryn, P., Van, L. B., Kjeldgaard, M., Russo, C. J., Passmore, L. A.,
Hove-Jensen, B., Jochimsen, B., and Brodersen, D. E.: Structural insights
into the bacterial carbon-phosphorus lyase machinery, Nature, 525,
68–72, https://doi.org/10.1038/nature14683, 2015.
Shaw, S. L., Chisholm, S. W., and Prinn, R. G.: Isoprene production by
Prochlorococcus, a marine cyanobacterium, and other phytoplankton, Mar.
Chem., 80, 227–245, https://doi.org/10.1016/S0304-4203(02)00101-9, 2003.
Sierra, A., Jiménez-López, D., Ortega, T., Ponce, R., Bellanco, M.
J., Sánchez-Leal, R., Gómez-Parra, A., and Forja, J.: Spatial and
seasonal variability of CH4 in the eastern Gulf of Cadiz (SW Iberian
Peninsula), Sci. Total Environ., 590/591, 695–707,
https://doi.org/10.1016/j.scitotenv.2017.03.030, 2017.
Staehr, P. A., Bade, D., Bogert, M. C. V. de, Koch, G. R., Williamson, C.,
Hanson, P., Cole, J. J., and Kratz, T.: Lake metabolism and the diel oxygen
technique: State of the science, Limnol. Oceanogr.-Method., 8, 628–644,
https://doi.org/10.4319/lom.2010.8.0628, 2010.
Steinke, M., Hodapp, B., Subhan, R., Bell, T. G., and Martin-Creuzburg, D.:
Flux of the biogenic volatiles isoprene and dimethyl sulfide from an
oligotrophic lake, Sci. Rep., 8, 1–10, https://doi.org/10.1038/s41598-017-18923-5,
2018.
Tang, K. W., McGinnis, D. F., Frindte, K., Brüchert, V., and Grossart,
H.-P.: Paradox reconsidered: Methane oversaturation in well-oxygenated lake
waters, Limnol. Oceanogr., 59, 275–284, https://doi.org/10.4319/lo.2014.59.1.0275,
2014.
Tang, K. W., McGinnis, D. F., Ionescu, D., and Grossart, H.-P.: Methane
Production in Oxic Lake Waters Potentially Increases Aquatic Methane Flux to
Air, Environ. Sci. Technol. Lett., 3, 227–233,
https://doi.org/10.1021/acs.estlett.6b00150, 2016.
Teikari, J. E., Fewer, D. P., Shrestha, R., Hou, S., Leikoski, N.,
Mäkelä, M., Simojoki, A., Hess, W. R., and Sivonen, K.: Strains of
the toxic and bloom-forming Nodularia spumigena (cyanobacteria) can degrade
methylphosphonate and release methane, ISME J., 12, 1619–1630,
https://doi.org/10.1038/s41396-018-0056-6, 2018.
Thalasso, F., Sepulveda-Jauregui, A., Gandois, L., Martinez-Cruz, K.,
Gerardo-Nieto, O., Astorga-España, M. S., Teisserenc, R., Lavergne, C.,
Tananaev, N., Barret, M., and Cabrol, L.: Sub-oxycline methane oxidation can
fully uptake CH4 produced in sediments: case study of a lake in
Siberia, Sci. Rep., 10, 1–7, https://doi.org/10.1038/s41598-020-60394-8, 2020.
Thanh-Duc, N., Crill, P., and Bastviken, D.: Implications of temperature and
sediment characteristics on methane formation and oxidation in lake
sediments, Biogeochemistry, 100, 185–196, https://doi.org/10.1007/s10533-010-9415-8,
2010.
Tilbrook, B. D. and Karl, D. M.: Methane sources, distributions and sinks
from California coastal waters to the oligotrophic North Pacific gyre, Mar.
Chem., 49, 51–64, https://doi.org/10.1016/0304-4203(94)00058-L, 1995.
Wang, Q., Dore, J. E., and McDermott, T. R.: Methylphosphonate metabolism by
Pseudomonas sp. populations contributes to the methane oversaturation
paradox in an oxic freshwater lake, Environ. Microbiol., 19, 2366–2378,
https://doi.org/10.1111/1462-2920.13747, 2017.
West, W. E., Coloso, J. J., and Jones, S. E.: Effects of algal and
terrestrial carbon on methane production rates and methanogen community
structure in a temperate lake sediment, Freshwater Biol., 57, 949–955,
https://doi.org/10.1111/j.1365-2427.2012.02755.x, 2012.
West, W. E., McCarthy, S. M., and Jones, S. E.: Phytoplankton lipid content
influences freshwater lake methanogenesis, Freshwater Biol., 60,
2261–2269, https://doi.org/10.1111/fwb.12652, 2015.
West, W. E., Creamer, K. P., and Jones, S. E.: Productivity and depth
regulate lake contributions to atmospheric methane: Lake productivity fuels
methane emissions, Limnol. Oceanogr., 61, S51–S61,
https://doi.org/10.1002/lno.10247, 2016.
White, A. K. and Metcalf, W. W.: Microbial Metabolism of Reduced Phosphorus
Compounds, Annu. Rev. Microbiol., 61, 379–400,
https://doi.org/10.1146/annurev.micro.61.080706.093357, 2007.
Wiesenburg, D. A. and Guinasso, N. L.: Equilibrium solubilities of methane,
carbon monoxide, and hydrogen in water and sea water, J. Chem. Eng. Data,
24, 356–360, https://doi.org/10.1021/je60083a006, 1979.
Willén, E.: Phytoplankton and reversed Eutrophication in Lake
Mälaren, Central Sweden, 1965–1983, Br. Phycol. J., 22, 193–208,
https://doi.org/10.1080/00071618700650241, 1987.
Wood, S. N.: Generalized additive models: an introduction with R, Chapman
and Hall/CRC, New York, USA, 416 pp., 2006.
Wood, S. N.: Fast stable restricted maximum likelihood and marginal
likelihood estimation of semiparametric generalized linear models, J. R.
Stat. Soc. Ser. B, 73, 3–36,
https://doi.org/10.1111/j.1467-9868.2010.00749.x, 2011.
Yamamoto, S., Alcauskas, J. B., and Crozier, T. E.: Solubility of methane in
distilled water and seawater, J. Chem. Eng. Data, 21, 78–80,
https://doi.org/10.1021/je60068a029, 1976.
Yao, M., Henny, C., and Maresca, J. A.: Freshwater bacteria release methane
as a byproduct of phosphorus acquisition, Appl. Environ. Microbiol., 82,
6994–7003, https://doi.org/10.1128/AEM.02399-16, 2016a.
Yao, M., Elling, F. J., Jones, C., Nomosatryo, S., Long, C. P., Crowe, S.
A., Antoniewicz, M. R., Hinrichs, K.-U., and Maresca, J. A.: Heterotrophic
bacteria from an extremely phosphate-poor lake have conditionally reduced
phosphorus demand and utilize diverse sources of phosphorus, Environ.
Microbiol., 18, 656–667, https://doi.org/10.1111/1462-2920.13063, 2016b.
Yoch, D. C.: Dimethylsulfoniopropionate: its sources, role in the marine
food web, and biological degradation to dimethylsulfide, Appl. Environ.
Microbiol., 68, 5804–5815, https://doi.org/10.1128/AEM.68.12.5804-5815.2002, 2002.
Yvon-Durocher, G., Allen, A. P., Bastviken, D., Conrad, R., Gudasz, C.,
St-Pierre, A., Thanh-Duc, N., and del Giorgio, P. A.: Methane fluxes show
consistent temperature dependence across microbial to ecosystem scales,
Nature, 507, 488–491, https://doi.org/10.1038/nature13164, 2014.
Zindler, C., Bracher, A., Marandino, C. A., Taylor, B., Torrecilla, E.,
Kock, A., and Bange, H. W.: Sulphur compounds, methane, and phytoplankton:
interactions along a north–south transit in the western Pacific Ocean,
Biogeosciences, 10, 3297–3311, https://doi.org/10.5194/bg-10-3297-2013, 2013.
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CH4 emissions from reservoirs are responsible for the majority of the climatic forcing of these ecosystems. The origin of the recurrent CH4 supersaturation in oxic waters is still controversial. We found that the dissolved CH4 concentration varied by up to 4 orders of magnitude in the water column of 12 reservoirs and was consistently supersaturated. Our findings suggest that photosynthetic picoeukaryotes can play a significant role in determining CH4 concentration in oxic waters.
CH4 emissions from reservoirs are responsible for the majority of the climatic forcing of these...
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