Articles | Volume 16, issue 16
https://doi.org/10.5194/bg-16-3207-2019
© Author(s) 2019. 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-16-3207-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
29 Aug 2019
Research article |
| 29 Aug 2019
| 29 Aug 2019
The ratio of methanogens to methanotrophs and water-level dynamics drive methane transfer velocity in a temperate kettle-hole peat bog
Department of Civil, Environmental and Geodetic Engineering, The Ohio State University, Columbus, Ohio 43210, USA
current address: Department of Environmental Science, Policy, and Management, University of California, Berkeley, California 94720, USA
Gil Bohrer
Department of Civil, Environmental and Geodetic Engineering, The Ohio State University, Columbus, Ohio 43210, USA
Julie Slater
School of Environment and Natural Resources, The Ohio State
University, Columbus, Ohio 43210, USA
Yueh-Fen Li
Department of Microbiology, The Ohio State University, Columbus, Ohio
43210, USA
Roger Grau-Andrés
School of Environment and Natural Resources, The Ohio State
University, Columbus, Ohio 43210, USA
Yushan Hao
School of Environment and Natural Resources, The Ohio State
University, Columbus, Ohio 43210, USA
Virginia I. Rich
Department of Microbiology, The Ohio State University, Columbus, Ohio
43210, USA
G. Matt Davies
School of Environment and Natural Resources, The Ohio State
University, Columbus, Ohio 43210, USA
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Drought conditions disrupt atmospheric carbon uptake in a Mediterranean saline lake
Physicochemical perturbation increases nitrous oxide production from denitrification in soils and sediments
Carbon degradation and mobilisation potentials of thawing permafrost peatlands in northern Norway inferred from laboratory incubations
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Johnathan Daniel Maxey, Neil D. Hartstein, Hermann W. Bange, and Moritz Müller
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The distribution of N2O in fjord-like estuaries is poorly described in the Southern Hemisphere. Our study describes N2O distribution and its drivers in one such system in Macquarie Harbour, Tasmania. Water samples were collected seasonally in 2022 and 2023. Results show the system removes atmospheric N2O when river flow is high, whereas the system emits N2O when the river flow is low. N2O generated in basins is intercepted by the surface water and exported to the ocean during high river flow.
Wael Al Hamwi, Maren Dubbert, Jörg Schaller, Matthias Lück, Marten Schmidt, and Mathias Hoffmann
Biogeosciences, 21, 5639–5651, https://doi.org/10.5194/bg-21-5639-2024, https://doi.org/10.5194/bg-21-5639-2024, 2024
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We present a fully automatic, low-cost soil–plant enclosure system to monitor CO2 and evapotranspiration fluxes within greenhouse experiments. It operates in two modes: independent, using low-cost sensors, and dependent, where multiple chambers connect to a single gas analyzer via a low-cost multiplexer. This system provides precise, accurate measurements and high temporal resolution, enabling comprehensive monitoring of plant–soil responses to various treatments and conditions.
Zhao-Jun Yong, Wei-Jen Lin, Chiao-Wen Lin, and Hsing-Juh Lin
Biogeosciences, 21, 5247–5260, https://doi.org/10.5194/bg-21-5247-2024, https://doi.org/10.5194/bg-21-5247-2024, 2024
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We measured CO2 and CH4 fluxes from mangrove stems and soils of Avicennia marina and Kandelia obovata during tidal cycles. Both stem types served as CO2 and CH4 sources, emitting less CH4 than soils, with no difference in CO2 flux. While A. marina stems showed increased CO2 fluxes from low to high tides, they acted as a CH4 sink before flooding and as a source after ebbing. However, K. obovata stems showed no flux pattern. This study highlights the need to consider tidal influence and species.
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.
Nathaniel B. Weston, Cynthia Troy, Patrick J. Kearns, Jennifer L. Bowen, William Porubsky, Christelle Hyacinthe, Christof Meile, Philippe Van Cappellen, and Samantha B. Joye
Biogeosciences, 21, 4837–4851, https://doi.org/10.5194/bg-21-4837-2024, https://doi.org/10.5194/bg-21-4837-2024, 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 disturbances to soils and sediments in N2O production. We demonstrate that physicochemical perturbation increases N2O production, microbial community adapts over time, and initial perturbation appears to confer resilience to subsequent disturbance.
Sigrid Trier Kjær, Sebastian Westermann, Nora Nedkvitne, and Peter Dörsch
Biogeosciences, 21, 4723–4737, https://doi.org/10.5194/bg-21-4723-2024, https://doi.org/10.5194/bg-21-4723-2024, 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 d to measure carbon loss. CO2 production was initially the highest, whereas CH4 production increased over time. The largest carbon loss was measured at the top of the peat plateau core as DOC.
Silvie Lainela, Erik Jacobs, Stella-Theresa Luik, Gregor Rehder, and Urmas Lips
Biogeosciences, 21, 4495–4519, https://doi.org/10.5194/bg-21-4495-2024, https://doi.org/10.5194/bg-21-4495-2024, 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 offshore areas of the Baltic Sea. Despite this high variability, caused mostly by coastal physical processes, the average annual air–sea CO2 fluxes differed only marginally between the sub-basins.
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
Biogeosciences, 21, 4341–4359, https://doi.org/10.5194/bg-21-4341-2024, https://doi.org/10.5194/bg-21-4341-2024, 2024
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The exchange of CO2 between the sea and the atmosphere was studied in the Archipelago Sea, Baltic Sea, in 2017–2021, using an eddy covariance technique. The sea acted as a net source of CO2 with an average yearly emission of 27.1 gC m-2 yr-1, indicating that the marine ecosystem respired carbon that originated elsewhere. The yearly CO2 emission varied between 18.2–39.2 gC m-2 yr-1, mostly due to the yearly variation of ecosystem carbon uptake.
Ralf C. H. Aben, Daniël van de Craats, Jim Boonman, Stijn H. Peeters, Bart Vriend, Coline C. F. Boonman, Ype van der Velde, Gilles Erkens, and Merit van den Berg
Biogeosciences, 21, 4099–4118, https://doi.org/10.5194/bg-21-4099-2024, https://doi.org/10.5194/bg-21-4099-2024, 2024
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Drained peatlands cause high CO2 emissions. We assessed the effectiveness of subsurface water infiltration systems (WISs) in reducing CO2 emissions related to increases in water table depth (WTD) on 12 sites for up to 4 years. Results show WISs markedly reduced emissions by 2.1 t CO2-C ha-1 yr-1. The relationship between the amount of carbon above the WTD and CO2 emission was stronger than the relationship between WTD and emission. Long-term monitoring is crucial for accurate emission estimates.
Eva-Marie Metz, Sanam Noreen Vardag, Sourish Basu, Martin Jung, and André Butz
EGUsphere, https://doi.org/10.5194/egusphere-2024-1955, https://doi.org/10.5194/egusphere-2024-1955, 2024
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We estimate CO2 fluxes in semi-arid southern Africa from 2009 to 2018 based on satellite CO2 measurements and atmospheric inverse modelling. By selecting process-based vegetation models, which agree with the satellite CO2 fluxes, we find that soil respiration mainly drives the seasonality, whereas photosynthesis substantially influences the interannual variability. Our study emphasizes the need of better representing the response of semi-arid ecosystems to soil rewetting in vegetation models.
Ingeborg Bussmann, Eric P. Achterberg, Holger Brix, Nicolas Brüggemann, Götz Flöser, Claudia Schütze, and Philipp Fischer
Biogeosciences, 21, 3819–3838, https://doi.org/10.5194/bg-21-3819-2024, https://doi.org/10.5194/bg-21-3819-2024, 2024
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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.
Olli-Pekka Tikkasalo, Olli Peltola, Pavel Alekseychik, Juha Heikkinen, Samuli Launiainen, Aleksi Lehtonen, Qian Li, Eduardo Martinez-García, Mikko Peltoniemi, Petri Salovaara, Ville Tuominen, and Raisa Mäkipää
EGUsphere, https://doi.org/10.5194/egusphere-2024-1994, https://doi.org/10.5194/egusphere-2024-1994, 2024
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The emissions of greenhouse gases (GHG) carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) were measured from a clearcut peatland forest site. The measurements covered the whole year of 2022 which was the second growing season after the clearcut. The site was a strong GHG source and the highest emissions came from CO2 followed by N2O and CH4. A statistical model that included information on different surfaces in the site was developed to unravel surface-type specific GHG fluxes.
Ruth Reef, Edoardo Daly, Tivanka Anandappa, Eboni-Jane Vienna-Hallam, Harriet Robertson, Matthew Peck, and Adrien Guyot
EGUsphere, https://doi.org/10.5194/egusphere-2024-2182, https://doi.org/10.5194/egusphere-2024-2182, 2024
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Studies show that saltmarshes excel at capturing carbon from the atmosphere. In this study, we measured CO2 flux in an Australian temperate saltmarsh on French Island. The temperate saltmarsh exhibited strong seasonality. During the warmer growing season, the saltmarsh absorbed on average 10.5 grams of CO2 from the atmosphere per m2 daily. Even in winter, when plants were dormant, it continued to be a CO2 sink, albeit smaller. Cool temperatures and high cloud cover inhibit carbon sequestration.
Niu Zhu, Jinniu Wang, Dongliang Luo, Xufeng Wang, Cheng Shen, and Ning Wu
Biogeosciences, 21, 3509–3522, https://doi.org/10.5194/bg-21-3509-2024, https://doi.org/10.5194/bg-21-3509-2024, 2024
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Our study delves into the vital role of subalpine forests in the Qinghai–Tibet Plateau as carbon sinks in the context of climate change. Utilizing advanced eddy covariance systems, we uncover their significant carbon sequestration potential, observing distinct seasonal patterns influenced by temperature, humidity, and radiation. Notably, these forests exhibit robust carbon absorption, with potential implications for global carbon balance.
Colette L. Kelly, Nicole M. Travis, Pascale Anabelle Baya, Claudia Frey, Xin Sun, Bess B. Ward, and Karen L. Casciotti
Biogeosciences, 21, 3215–3238, https://doi.org/10.5194/bg-21-3215-2024, https://doi.org/10.5194/bg-21-3215-2024, 2024
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Nitrous oxide, a potent greenhouse gas, accumulates in regions of the ocean that are low in dissolved oxygen. We used a novel combination of chemical tracers to determine how nitrous oxide is produced in one of these regions, the eastern tropical North Pacific Ocean. Our experiments showed that the two most important sources of nitrous oxide under low-oxygen conditions are denitrification, an anaerobic process, and a novel “hybrid” process performed by ammonia-oxidizing archaea.
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
Biogeosciences, 21, 3183–3199, https://doi.org/10.5194/bg-21-3183-2024, https://doi.org/10.5194/bg-21-3183-2024, 2024
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Carbon monoxide (CO) is regarded as an important indirect greenhouse gas. Soils can emit and take up CO, but, until now, uncertainty remains as to which process dominates in tropical rainforests. We present the first soil CO flux measurements from a tropical rainforest. Based on our observations, we report that tropical rainforest soils are a net source of CO. In addition, we show that valley streams and inundated areas are likely additional hot spots of CO in the ecosystem.
Sebastian F. A. Jordan, Stefan Schloemer, Martin Krüger, Tanja Heffner, Marcus A. Horn, and Martin Blumenberg
EGUsphere, https://doi.org/10.5194/egusphere-2024-1461, https://doi.org/10.5194/egusphere-2024-1461, 2024
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In a multilayered approach, we studied eight cut and buried abandoned oil wells in a peat rich area of Northern Germany for methane flux, soil gas composition, and isotopic signatures of soil methane and carbon dioxide. The detected methane emissions were of biogenic, peat origin and were not associated with the abandoned wells. Additional microbial analysis and methane oxidation rate measurements demonstrated a high methane-emission mitigation potential in the studied peat-soils.
Laura Thölix, Leif Backman, Minttu Havu, Esko Karvinen, Jesse Soininen, Justine Trémeau, Olli Nevalainen, Joyson Ahongshangbam, Leena Järvi, and Liisa Kulmala
EGUsphere, https://doi.org/10.5194/egusphere-2024-1453, https://doi.org/10.5194/egusphere-2024-1453, 2024
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Cities seek carbon neutrality and are interested in the sinks of urban vegetation. Measurements are difficult to do which leads to the need for modeling carbon cycle. In this study, we examined the performance of models in estimating carbon sequestration rates in lawns, park trees, and urban forests in Helsinki, Finland. We found that models simulated seasonal and annual variations well. Trees had larger carbon sequestration rates compared with lawns and irrigation often increased carbon sink.
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.
Gabrielle Emma Kleber, Leonard Magerl, Alexandra V. Turchyn, Mark Trimmer, Yizhu Zhu, and Andrew Hodson
EGUsphere, https://doi.org/10.5194/egusphere-2024-1273, https://doi.org/10.5194/egusphere-2024-1273, 2024
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Our research on Svalbard has uncovered that melting glaciers can release large amounts of methane, a potent greenhouse gas. By studying a glacier over two summers, we found that its river was highly concentrated in methane. This suggests that as the Arctic warms and glaciers melt, they could be a significant source of methane emissions. This is the first time such emissions have been measured on Svalbard, indicating a wider environmental concern as similar processes may occur across the Arctic.
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.
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.
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.
Cited articles
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, 1567, https://doi.org/10.1038/s41467-017-01753-4, 2017.
Apprill, A., McNally, S., Parsons, R., and Weber, L.: Minor revision to V4
region SSU rRNA 806R gene primer greatly increases detection of SAR11
bacterioplankton, Aquat. Microb. Ecol., 75, 129–137,
https://doi.org/10.3354/ame01753, 2015.
Basiliko, N., Blodau, C., Roehm, C., Bengtson, P., and Moore, T. R.:
Regulation of decomposition and methane dynamics across natural,
commercially mined, and restored northern peatlands, Ecosystems, 10,
1148–1165, https://doi.org/10.1007/s10021-007-9083-2, 2007.
Basiliko, N., Henry, K., Gupta, V., Moore, T. R., Driscoll, B. T., and
Dunfield, P. F.: Controls on bacterial and archaeal community structure and
greenhouse gas production in natural, mined, and restored Canadian
peatlands, Front. Microbiol., 4, 215, https://doi.org/10.3389/fmicb.2013.00215, 2013.
Bohn, T. J., Lettenmaier, D. P., Sathulur, K., Bowling, L. C., Podest, E.,
McDonald, K. C., and Friborg, T.: Methane emissions from western Siberian
wetlands: heterogeneity and sensitivity to climate change, Environ. Res.
Lett., 2, 4, https://doi.org/10.1088/1748-9326/2/4/045015, 2007.
Bridgham, S. D. and Richardson, C. J.: Mechanisms controlling soil
respiration (CO2 and CH4) in southern peatlands, Soil Biol. Biochem.,
24, 1089–1099, https://doi.org/10.1016/0038-0717(92)90058-6, 1992.
Bridgham, S. D., Cadillo-Quiroz, H., Keller, J. K., and Zhuang, Q. L.:
Methane emissions from wetlands: biogeochemical, microbial, and modeling
perspectives from local to global scales, Glob. Change Biol., 19,
1325–1346, https://doi.org/10.1111/gcb.12131, 2013.
Cai, S. and Yu, Z.: Response of a warm temperate peatland to Holocene
climate change in northeastern Pennsylvania, Quaternary Res., 75, 531–540,
https://doi.org/10.1016/j.yqres.2011.01.003, 2011.
Caporaso, J. G., Kuczynski, J., Stombaugh, J., Bittinger, K., Bushman, F.
D., Costello, E. K., Fierer, N., Peña, A. G., Goodrich, J. K., Gordon,
J. I., Huttley, G. A., Kelley, S. T., Knights, D., Koenig, J. E., Ley, R.
E., Lozupone, C. A., McDonald, D., Muegge, B. D., Pirrung, M., Reeder, J.,
Sevinsky, J. R., Turnbaugh, P. J., Walters, W. A., Widmann, J., Yatsunenko,
T., Zaneveld, J., and Knight, R.: QIIME allows analysis of high-throughput
community sequencing data, Nat. Methods, 7, 335–336,
https://doi.org/10.1038/nmeth.f.303, 2010.
Chamberlain, S. D., Anthony, T. L., Silver, W. L., Eichelmann, E., Hemes, K.
S., Oikawa, P. Y., Sturtevant, C., Szutu, D. J., Verfaillie, J. G., and
Baldocchi, D. D.: Soil properties and sediment accretion modulate methane
fluxes from restored wetlands, Glob. Change Biol., 24, 4107–4121,
https://doi.org/10.1111/gcb.14124, 2018.
Chasar, L. S., Chanton, J. P., Glaser, P. H., and Siegel, D. I.: Methane
concentration and stable isotope distribution as evidence of rhizospheric
processes: Comparison of a fen and bog in the Glacial Lake Agassiz Peatland
complex, Ann. Bot., 86, 655–663, https://doi.org/10.1006/anbo.2000.1172, 2000.
Christen, A., Jassal, R. S., Black, T. A., Grant, N. J., Hawthorne, I.,
Johnson, M. S., Lee, S. C., and Merkens, M.: Summertime greenhouse gas fluxes
from an urban bog undergoing restoration through rewetting, Mires Peat, 17, 1–24,
https://doi.org/10.19189/MaP.2015.OMB.207, 2016.
Chu, H. S., Chen, J. Q., Gottgens, J. F., Ouyang, Z. T., John, R.,
Czajkowski, K., and Becker, R.: Net ecosystem methane and carbon dioxide
exchanges in a Lake Erie coastal marsh and a nearby cropland, J. Geophys.
Res.-Biogeo., 119, 722–740, https://doi.org/10.1002/2013jg002520, 2014.
Ciais, P., Gasser, T., Paris, J. D., Caldeira, K., Raupach, M. R., Canadell, J. G., Patwardhan, A., Friedlingstein, P., Piao, S. L., and Gitz, V.: Attributing the increase in atmospheric CO2 to emitters and absorbers, Nat. Clim. Change, 3, 926, 2013.
Colwell, S. R.: Characterization of Upland/Wetland Community Types: Changes to Flatiron Lake Bog over a 24-Year Period, The Ohio State University, available at: https://etd.ohiolink.edu/pg_10?0::NO:10:P10_ETD_SUBID:68741 (last access: 23 August 2019), 2009.
Crill, P. M., Bartlett, K. B., Harriss, R. C., Gorham, E., Verry, E. S.,
Sebacherl, D. I., Madsar, L., and Sanner, W.: Methane flux from minnesota
peatlands, Glob. Biogeochem. Cy., 2, 371–384,
https://doi.org/10.1029/GB002i004p00371, 1988.
Dean, J. F., Middelburg, J. J., Röckmann, T., Aerts, R., Blauw, L. G.,
Egger, M., Jetten, M. S. M., Jong, A. E. E. de, Meisel, O. H., Rasigraf, O.,
Slomp, C. P., in't Zandt, M. H., and Dolman, A. J.: Methane Feedbacks to the
Global Climate System in a Warmer World, Rev. Geophys., 56, 207–250,
https://doi.org/10.1002/2017RG000559, 2018.
Dedysh, S. N.: Cultivating Uncultured Bacteria from Northern Wetlands:
Knowledge Gained and Remaining Gaps, Front. Microbiol., 2, 184,
https://doi.org/10.3389/fmicb.2011.00184, 2011.
Dise, N. B.: Methane emission from minnesota peatlands – spatial and
seasonal variability, Glob. Biogeochem. Cy., 7, 123–142,
https://doi.org/10.1029/92gb02299, 1993.
Glatzel, S., Basiliko, N., and Moore, T.: Carbon dioxide and methane
production potentials of peats from natural, harvested, and restored sites,
eastern Quebec, Canada, Wetlands, 24, 261–267,
https://doi.org/10.1672/0277-5212(2004)024[0261:cdampp]2.0.co;2, 2004.
Godin, A., McLaughlin, J. W., Webster, K. L., Packalen, M., and Basiliko, N.:
Methane and methanogen community dynamics across a boreal peatland nutrient
gradient, Soil Biol. Biochem., 48, 96–105,
https://doi.org/10.1016/j.soilbio.2012.01.018, 2012.
Greenup, A. L., Bradford, M. A., McNamara, N. P., Ineson, P., and Lee, J. A.: The role of Eriophorum vaginatum in CH4 flux from an ombrotrophic peatland, Plant Soil, 227, 265–272, https://doi.org/10.1023/a:1026573727311, 2000.
Hatala, J. A., Detto, M., and Baldocchi, D. D.: Gross ecosystem
photosynthesis causes a diurnal pattern in methane emission from rice,
Geophys. Res. Lett., 39, L06409, https://doi.org/10.1029/2012gl051303, 2012.
Holgerson, M. A., Farr, E. R., and Raymond, P. A.: Gas transfer velocities in
small forested ponds, J. Geophys. Res.-Biogeo., 122, 1011–1021,
https://doi.org/10.1002/2016JG003734, 2017.
Hoyos-Santillan, J., Lomax, B. H., Large, D., Turner, B. L., Boom, A.,
Lopez, O. R., and Sjogersten, S.: Quality not quantity: Organic matter
composition controls of CO2 and CH4 fluxes in neotropical peat profiles,
Soil Biol. Biochem., 103, 86–96, https://doi.org/10.1016/j.soilbio.2016.08.017, 2016.
Kelly, C. A., Dise, N. B., and Martens, C. S.: Temporal variations in the
stable carbon isotopic composmon of methane emitted from minnesota
peatlands, Glob. Biogeochem. Cy., 6, 263–269, https://doi.org/10.1029/92gb01478,
1992.
Kettunen, A.: Connecting methane fluxes to vegetation cover and water table
fluctuations at microsite level: A modeling study, Glob. Biogeochem. Cy.,
17, 1051, https://doi.org/10.1029/2002gb001958, 2003.
Kim, J., Verma, S. B., and Billesbach, D. P.: Seasonal variation in methane
emission from a temperate Phragmites-dominated marsh: effect of growth stage
and plant-mediated transport, Glob. Change Biol., 5, 433–440,
https://doi.org/10.1046/j.1365-2486.1999.00237.x, 1999.
Kim, S. Y., Lee, S. H., Freeman, C., Fenner, N., and Kang, H.: Comparative
analysis of soil microbial communities and their responses to the short-term
drought in bog, fen, and riparian wetlands, Soil Biol. Biochem., 40,
2874–2880, https://doi.org/10.1016/j.soilbio.2008.08.004, 2008.
Kirschke, S., Bousquet, P., Ciais, P., Saunois, M., Canadell, J. G.,
Dlugokencky, E. J., Bergamaschi, P., Bergmann, D., Blake, D. R., Bruhwiler,
L., Cameron-Smith, P., Castaldi, S., Chevallier, F., Feng, L., Fraser, A.,
Heimann, M., Hodson, E. L., Houweling, S., Josse, B., Fraser, P. J.,
Krummel, P. B., Lamarque, J. F., Langenfelds, R. L., Le Quere, C., Naik, V.,
O'Doherty, S., Palmer, P. I., Pison, I., Plummer, D., Poulter, B., Prinn, R.
G., Rigby, M., Ringeval, B., Santini, M., Schmidt, M., Shindell, D. T.,
Simpson, I. J., Spahni, R., Steele, L. P., Strode, S. A., Sudo, K., Szopa,
S., van der Werf, G. R., Voulgarakis, A., van Weele, M., Weiss, R. F.,
Williams, J. E., and Zeng, G.: Three decades of global methane sources and
sinks, Nat. Geosci., 6, 813–823, https://doi.org/10.1038/ngeo1955, 2013.
Kostka, J. E., Weston, D. J., Glass, J. B., Lilleskov, E. A., Shaw, A. J.,
and Turetsky, M. R.: The Sphagnum microbiome: new insights from an ancient
plant lineage, New Phytol., 211, 57–64, https://doi.org/10.1111/nph.13993, 2016.
Kotsyurbenko, O. R., Chin, K. J., Glagolev, M. V., Stubner, S., Simankova,
M. V., Nozhevnikova, A. N., and Conrad, R.: Acetoclastic and hydrogenotrophic
methane production and methanogenic populations in an acidic West-Siberian
peat bog, Environ. Microbiol., 6, 1159–1173,
https://doi.org/10.1111/j.1462-2920.2004.00634.x, 2004.
Kuznetsova, A., Brockhoff, P. B., and Christensen, R. H. B.: lmerTest
Package: Tests in Linear Mixed Effects Models, J. Stat. Softw., 82,
1–26, https://doi.org/10.18637/jss.v082.i13, 2017.
Lai, D. Y. F.: Methane Dynamics in Northern Peatlands: A Review, Pedosphere,
19, 409–421, 2009.
Lai, D. Y. F., Moore, T. R., and Roulet, N. T.: Spatial and temporal
variations of methane flux measured by autochambers in a temperate
ombrotrophic peatland, J. Geophys. Res.-Biogeo., 119, 864–880,
https://doi.org/10.1002/2013jg002410, 2014.
Lansdown, J. M., Quay, P. D., and King, S. L.: CH4 production via CO2
reduction in a temperate bog: A source of 13C-depIeted CH4, Geochim.
Cosmochim. Ac., 56, 3493–3503, https://doi.org/10.1016/0016-7037(92)90393-W, 1992.
Lee, H. J., Kim, S. Y., Kim, P. J., Madsen, E. L., and Jeon, C. O.: Methane
emission and dynamics of methanotrophic and methanogenic communities in a
flooded rice field ecosystem, FEMS Microbiol. Ecol., 88, 195–212,
https://doi.org/10.1111/1574-6941.12282, 2014.
Le Mer, J. and Roger, P.: Production, oxidation, emission and consumption of
methane by soils: A review, Eur. J. Soil Biol., 37, 25–50,
https://doi.org/10.1016/s1164-5563(01)01067-6, 2001.
Lenth, R., Singmann, H., Love, J., Buerkner, P., and Herve, M.: emmeans:
Estimated Marginal Means, aka Least-Squares Means, available at:
https://CRAN.R-project.org/package=emmeans, last access: 24 December 2018.
Liu, Y. C. and Whitman, W. B.: Metabolic, phylogenetic, and ecological
diversity of the methanogenic archaea, in: Incredible Anaerobes: From
Physiology to Genomics to Fuels, vol. 1125, edited by: Wiegel, J.,
Maier, R. J., and Adams, M. W. W., pp. 171–189, 2008.
MacDonald, L. H., Paull, J. S., and Jaffe, P. R.: Enhanced semipermanent
dialysis samplers for long-term environmental monitoring in saturated
sediments, Environ. Monit. Assess., 185, 3613–3624,
https://doi.org/10.1007/s10661-012-2813-8, 2013.
Malhotra, A., Roulet, N. T., Wilson, P., Giroux-Bougard, X., and Harris, L.
I.: Ecohydrological feedbacks in peatlands: an empirical test of the
relationship among vegetation, microtopography and water table,
Ecohydrology, 9, 1346–1357, https://doi.org/10.1002/eco.1731, 2016.
McCalley, C. K., Woodcroft, B. J., Hodgkins, S. B., Wehr, R. A., Kim, E.-H.,
Mondav, R., Crill, P. M., Chanton, J. P., Rich, V. I., Tyson, G. W., and
Saleska, S. R.: Methane dynamics regulated by microbial community response
to permafrost thaw, Nature, 514, 478–481, https://doi.org/10.1038/nature13798,
2014.
Moore, P. D.: The future of cool temperate bogs, Environ. Conserv., 29,
3–20, https://doi.org/10.1017/s0376892902000024, 2002.
Moore, T. R. and Dalva, M.: The influence of temperature and water-table
position on carbon-dioxide and methane emissions from laboratory columns of
peatland soils, J. Soil Sci., 44, 651–664, 1993.
Morin, T. H., Bohrer, G., Naor-Azrieli, L., Mesi, S., Kenny, W. T., Mitsch,
W. J., and Schaefer, K. V. R.: The seasonal and diurnal dynamics of methane
flux at a created urban wetland, Ecol. Eng., 72, 74–83,
https://doi.org/10.1016/j.ecoleng.2014.02.002, 2014.
Morin, T. H., Bohrer, G., Stefanik, K. C., Rey-Sanchez, A. C., Matheny, A.
M., and Mitsch, W. J.: Combining eddy-covariance and chamber measurements to
determine the methane budget from a small, heterogeneous urban floodplain
wetland park, Agric. Forest Meteorol., 237, 160–170,
https://doi.org/10.1016/j.agrformet.2017.01.022, 2017.
Nadeau, D. F., Rousseau, A. N., Coursolle, C., Margolis, H. A., and Parlange,
M. B.: Summer methane fluxes from a boreal bog in northern Quebec, Canada,
using eddy covariance measurements, Atmos. Environ., 81, 464–474,
https://doi.org/10.1016/j.atmosenv.2013.09.044, 2013.
Nahlik, A. M. and Mitsch, W. J.: Methane Emissions From Created Riverine
Wetlands, Wetlands, 30, 783–793, https://doi.org/10.1007/s13157-010-0038-6, 2010.
Nelson, M. C., Morrison, H. G., Benjamino, J., Grim, S. L., and Graf, J.:
Analysis, Optimization and Verification of Illumina-Generated 16S rRNA Gene
Amplicon Surveys, PLOS ONE, 9, e94249, https://doi.org/10.1371/journal.pone.0094249,
2014.
Oleszczuk, R. and Truba, M.: The analysis of some physical properties of
drained peat-moorsh soil layers, Ann. Wars. Univ. Life Sci. 00 SGGW Land
Reclam., 45, 41–48, https://doi.org/10.2478/sggw-2013-0004, 2013.
Pangala, S. R., Moore, S., Hornibrook, E. R. C., and Gauci, V.: Trees are
major conduits for methane egress from tropical forested wetlands, New
Phytol., 197, 524–531, https://doi.org/10.1111/nph.12031, 2013.
Parada, A. E., Needham, D. M., and Fuhrman, J. A.: Every base matters:
assessing small subunit rRNA primers for marine microbiomes with mock
communities, time series and global field samples, Environ. Microbiol.,
18, 1403–1414, https://doi.org/10.1111/1462-2920.13023, 2016.
Pugh, C. A., Reed, D. E., Desai, A. R., and Sulman, B. N.: Wetland flux
controls: how does interacting water table levels and temperature influence
carbon dioxide and methane fluxes in northern Wisconsin?, Biogeochemistry,
137, 15–25, https://doi.org/10.1007/s10533-017-0414-x, 2018.
Raghoebarsing, A. A., Smolders, A. J. P., Schmid, M. C., Rijpstra, W. I. C.,
Wolters-Arts, M., Derksen, J., Jetten, M. S. M., Schouten, S., Damste, J. S.
S., Lamers, L. P. M., Roelofs, J. G. M., den Camp, H., and Strous, M.:
Methanotrophic symbionts provide carbon for photosynthesis in peat bogs,
Nature, 436, 1153–1156, https://doi.org/10.1038/nature03802, 2005.
R Development Core Team: R: A language and environment for statistical
computing., available at: http://www.R-project.org (last access: 7 January 2019), 2018.
Rey-Sanchez, A. C., Morin, T. H., Stefanik, K. C., Wrighton, K., and Bohrer,
G.: Determining total emissions and environmental drivers of methane flux in
a Lake Erie estuarine marsh, Ecol. Eng., 114, 7–15,
https://doi.org/10.1016/j.ecoleng.2017.06.042, 2018.
Schilder, J., Bastviken, D., Hardenbroek, M., and van and Heiri, O.:
Spatiotemporal patterns in methane flux and gas transfer velocity at low
wind speeds: Implications for upscaling studies on small lakes, J. Geophys.
Res.-Biogeo., 121, 1456–1467, https://doi.org/10.1002/2016JG003346, 2016.
Schneider, C. A., Rasband, W. S., and Eliceiri, K. W.: NIH Image to ImageJ:
25 years of image analysis, Nat. Methods, 9, 671–675,
https://doi.org/10.1038/nmeth.2089, 2012.
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.
Sha, C., Mitsch, W. J., Mander, U., Lu, J. J., Batson, J., Zhang, L., and He,
W. S.: Methane emissions from freshwater riverine wetlands, Ecol. Eng.,
37, 16–24, https://doi.org/10.1016/j.ecoleng.2010.07.022, 2011.
Shannon, R. D. and White, J. R.: 3-year study of controls on methane
emissions from 2 Michigan peatlands, Biogeochemistry, 27, 35–60, 1994.
Smemo, K. A. and Yavitt, J. B.: Anaerobic oxidation of methane: an underappreciated aspect of methane cycling in peatland ecosystems?, Biogeosciences, 8, 779–793, https://doi.org/10.5194/bg-8-779-2011, 2011.
Strack, M. and Zuback, Y. C. A.: Annual carbon balance of a peatland 10 yr following restoration, Biogeosciences, 10, 2885–2896, https://doi.org/10.5194/bg-10-2885-2013, 2013.
Sundqvist, E., Crill, P., Molder, M., Vestin, P., and Lindroth, A.:
Atmospheric methane removal by boreal plants, Geophys. Res. Lett., 39, L21806,
https://doi.org/10.1029/2012gl053592, 2012.
Treat, C. C., Bubier, J. L., Varner, R. K., and Crill, P. M.: Timescale
dependence of environmental and plant-mediated controls on CH4 flux in a
temperate fen, J. Geophys. Res.-Biogeo., 112, G01014,
https://doi.org/10.1029/2006jg000210, 2007.
Turetsky, M. R., Kotowska, A., Bubier, J., Dise, N. B., Crill, P.,
Hornibrook, E. R. C., Minkkinen, K., Moore, T. R., Myers-Smith, I. H.,
Nykanen, H., Olefeldt, D., Rinne, J., Saarnio, S., Shurpali, N., Tuittila,
E. S., Waddington, J. M., White, J. R., Wickland, K. P., and Wilmking, M.: A
synthesis of methane emissions from 71 northern, temperate, and subtropical
wetlands, Glob. Change Biol., 20, 2183–2197, https://doi.org/10.1111/gcb.12580,
2014.
Updegraff, K., Pastor, J., Bridgham, S. D., and Johnston, C. A.:
Environmental and substrate controls over carbon and nitrogen mineralization
in northern wetlands, Ecol. Appl., 5, 151–163, https://doi.org/10.2307/1942060,
1995.
US EPA, O.: EPA Method 350.1: Determination of Ammonia Nitrogen by
Semi-Automated Colorimetry, US EPA, available at:
https://www.epa.gov/homeland-security-research/epa-method-3501-determination-ammonia-nitrogen-semi-automated-colorimetry
(last access: 5 March 2019), 2015a.
US EPA, O.: SW-846 Test Method 6010D: Inductively Coupled Plasma-Optical
Emission Spectrometry (ICP-OES), US EPA, available at:
https://www.epa.gov/hw-sw846/sw-846-test-method-6010d-inductively-coupled-plasma-optical-emission-spectrometry-icp-oes
(last access: 5 March 2019), 2015b.
Van der Nat, F., Middelburg, J. J., Van Meteren, D., and Wielemakers, A.:
Diel methane emission patterns from Scirpus lacustris and Phragmites
australis, Biogeochemistry, 41, 1–22, https://doi.org/10.1023/a:1005933100905, 1998.
Vitt, D. H. and Slack, N. G.: An analysis of the vegetation of Sphagnum-dominated
kettle-hole bogs in relation to environmental gradients, Can. J. Bot.,
53, 332–359, https://doi.org/10.1139/b75-042, 1975.
Waddington, J. M. and Day, S. M.: Methane emissions from a peatland
following restoration, J. Geophys. Res.-Biogeo., 112, 112,
https://doi.org/10.1029/2007jg000400, 2007.
Walters, W., Hyde, E. R., Berg-Lyons, D., Ackermann, G., Humphrey, G.,
Parada, A., Gilbert, J. A., Jansson, J. K., Caporaso, J. G., Fuhrman, J. A.,
Apprill, A., and Knight, R.: Improved Bacterial 16S rRNA Gene (V4 and V4-5)
and Fungal Internal Transcribed Spacer Marker Gene Primers for Microbial
Community Surveys, mSystems, 1, e00009-15, https://doi.org/10.1128/mSystems.00009-15,
2016.
Wang, Z. P., Delaune, R. D., Masscheleyn, P. H., and Patrick, W. H.: Soil
redox and ph effects on methane production in a flooded rice soil, Soil Sci.
Soc. Am. J., 57, 382–385, 1993.
Wanninkhof, R.: Relationship between wind speed and gas exchange over the
ocean revisited, Limnol. Oceanogr.-Methods, 12, 351–362,
https://doi.org/10.4319/lom.2014.12.351, 2014.
White, J. R., Shannon, R. D., Weltzin, J. F., Pastor, J., and Bridgham, S.
D.: Effects of soil warming and drying on methane cycling in a northern
peatland mesocosm study, J. Geophys. Res.-Biogeo., 113, G00A06,
https://doi.org/10.1029/2007jg000609, 2008.
Whiting, G. J. and Chanton, J. P.: Plant-dependent CH4 emission in a
subarctic canadian fen, Glob. Biogeochem. Cy., 6, 225–231,
https://doi.org/10.1029/926b00710, 1992.
Short summary
It is estimated that natural wetlands emit approximately 30 % of all the methane released to the atmosphere; yet these estimates are highly uncertain due to the complexity of biological, chemical, and physical processes controlling methane emissions. In this study, we explore how some of these key processes drive methane emissions in a temperate peat bog. We show that the composition of microbial methane cyclers in the upper portion of the peat drives the velocity of methane release to the air.
It is estimated that natural wetlands emit approximately 30 % of all the methane released to the...
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