Articles | Volume 16, issue 20
https://doi.org/10.5194/bg-16-4085-2019
© 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-16-4085-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
25 Oct 2019
Research article |
| 25 Oct 2019
| 25 Oct 2019
CO2 and CH4 budgets and global warming potential modifications in Sphagnum-dominated peat mesocosms invaded by Molinia caerulea
Fabien Leroy
CORRESPONDING AUTHOR
ISTO, Université d'Orléans, UMR 7327, 45071, Orléans,
France
ISTO, CNRS, UMR 7327, 45071, Orléans, France
ISTO, BRGM, UMR 7327, BP 36009, 45060, Orléans, France
Sébastien Gogo
ISTO, Université d'Orléans, UMR 7327, 45071, Orléans,
France
ISTO, CNRS, UMR 7327, 45071, Orléans, France
ISTO, BRGM, UMR 7327, BP 36009, 45060, Orléans, France
Christophe Guimbaud
LPC2E, Université d'Orléans, UMR 7328, 45071, Orléans,
France
LPC2E, CNRS, UMR 7328, 45071, Orléans, France
Léonard Bernard-Jannin
ISTO, Université d'Orléans, UMR 7327, 45071, Orléans,
France
ISTO, CNRS, UMR 7327, 45071, Orléans, France
ISTO, BRGM, UMR 7327, BP 36009, 45060, Orléans, France
Xiaole Yin
School of Environmental Science and Engineering, Shandong University,
Jinan, China
Guillaume Belot
LPC2E, Université d'Orléans, UMR 7328, 45071, Orléans,
France
LPC2E, CNRS, UMR 7328, 45071, Orléans, France
Wang Shuguang
School of Environmental Science and Engineering, Shandong University,
Jinan, China
Fatima Laggoun-Défarge
ISTO, Université d'Orléans, UMR 7327, 45071, Orléans,
France
ISTO, CNRS, UMR 7327, 45071, Orléans, France
ISTO, BRGM, UMR 7327, BP 36009, 45060, Orléans, France
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Léonard Bernard-Jannin, Stéphane Binet, Sébastien Gogo, Fabien Leroy, Christian Défarge, Nevila Jozja, Renata Zocatelli, Laurent Perdereau, and Fatima Laggoun-Défarge
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Peatlands are a major stock of carbon that can be released as dissolved organic carbon (DOC), affecting carbon balance and downstream water quality. This study investigates the impact of peatland restoration on water balance and DOC exports using a simple modelling approach. The results suggest that the restoration can affect the water balance and the dynamics of DOC in the peatland. However, there is no major impact in the quantity of DOC released in a short-term period (3 years).
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A methane model that features methane production and transport by plants, the ebullition process and diffusion in soil, oxidation to CO2, and CH4 fluxes to the atmosphere has been embedded in the ORCHIDEE-PEAT land surface model, which includes an explicit representation of northern peatlands. This model, ORCHIDEE-PCH4, was calibrated and evaluated on 14 peatland sites. Results show that the model is sensitive to temperature and substrate availability over the top 75 cm of soil depth.
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Methane is an important greenhouse gas, yet we lack knowledge about its global emissions and drivers. We present FLUXNET-CH4, a new global collection of methane measurements and a critical resource for the research community. We use FLUXNET-CH4 data to quantify the seasonality of methane emissions from freshwater wetlands, finding that methane seasonality varies strongly with latitude. Our new database and analysis will improve wetland model accuracy and inform greenhouse gas budgets.
Léonard Bernard-Jannin, Stéphane Binet, Sébastien Gogo, Fabien Leroy, Christian Défarge, Nevila Jozja, Renata Zocatelli, Laurent Perdereau, and Fatima Laggoun-Défarge
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Chunjing Qiu, Dan Zhu, Philippe Ciais, Bertrand Guenet, Gerhard Krinner, Shushi Peng, Mika Aurela, Christian Bernhofer, Christian Brümmer, Syndonia Bret-Harte, Housen Chu, Jiquan Chen, Ankur R. Desai, Jiří Dušek, Eugénie S. Euskirchen, Krzysztof Fortuniak, Lawrence B. Flanagan, Thomas Friborg, Mateusz Grygoruk, Sébastien Gogo, Thomas Grünwald, Birger U. Hansen, David Holl, Elyn Humphreys, Miriam Hurkuck, Gerard Kiely, Janina Klatt, Lars Kutzbach, Chloé Largeron, Fatima Laggoun-Défarge, Magnus Lund, Peter M. Lafleur, Xuefei Li, Ivan Mammarella, Lutz Merbold, Mats B. Nilsson, Janusz Olejnik, Mikaell Ottosson-Löfvenius, Walter Oechel, Frans-Jan W. Parmentier, Matthias Peichl, Norbert Pirk, Olli Peltola, Włodzimierz Pawlak, Daniel Rasse, Janne Rinne, Gaius Shaver, Hans Peter Schmid, Matteo Sottocornola, Rainer Steinbrecher, Torsten Sachs, Marek Urbaniak, Donatella Zona, and Klaudia Ziemblinska
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Northern peatlands store large amount of soil carbon and are vulnerable to climate change. We implemented peatland hydrological and carbon accumulation processes into the ORCHIDEE land surface model. The model was evaluated against EC measurements from 30 northern peatland sites. The model generally well reproduced the spatial gradient and temporal variations in GPP and NEE at these sites. Water table depth was not well predicted but had only small influence on simulated NEE.
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Biogeosciences Discuss., https://doi.org/10.5194/bg-2017-423, https://doi.org/10.5194/bg-2017-423, 2017
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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
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
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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.
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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.
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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
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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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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.
Ralf C. H. Aben, Daniel 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
EGUsphere, https://doi.org/10.5194/egusphere-2024-403, https://doi.org/10.5194/egusphere-2024-403, 2024
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Drained peatlands cause high CO2 emissions. Raising the groundwater table can lower emissions. We used automated flux chamber measurements on 12 sites for up to 4 years and found a linear association between annual water table depth and CO2 emission. We also found that the average amount of carbon above the water table better predicted annual CO2 emission than water table depth and that water infiltration systems—used to effectively raise the water table—can be used to mitigate CO2 emissions.
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.
Shahar Baram, Asher Bar-Tal, Alon Gal, Shmulik P. Friedman, and David Russo
Biogeosciences, 19, 3699–3711, https://doi.org/10.5194/bg-19-3699-2022, https://doi.org/10.5194/bg-19-3699-2022, 2022
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Static chambers are the most common tool used to measure greenhouse gas (GHG) fluxes. We tested the impact of such chambers on nitrous oxide emissions in drip irrigation. Field measurements and 3-D simulations show that the chamber base drastically affects the water and nutrient distribution in the soil and hence the measured GHG fluxes. A nomogram is suggested to determine the optimal diameter of a cylindrical chamber that ensures minimal disturbance.
Cited articles
Armstrong, A., Waldron, S., Ostle, N. J., Richardson, H., and Whitaker, J.:
Biotic and abiotic factors interact to regulate northern peatland carbon
cycling, Ecosystems, 18, 1395–1409, https://doi.org/10.1007/s10021-015-9907-4, 2015.
Beer, J. and Blodau, C.: Transport and thermodynamics constrain belowground
carbon turnover in a northern peatland, Geochim. Cosmochim. Ac.,
71, 2989–3002, https://doi.org/10.1016/j.gca.2007.03.010, 2007.
Berendse, F., Van Breemen, N., Rydin, H., Buttler, A., Heijmans, M.,
Hoosbeek, M. R., Lee, J. A, Mitchell, E., Saarinen, T., Vasander, H., and
Wallén, B.: Raised atmospheric CO2 levels and increased N deposition
cause shifts in plant species composition and production in Sphagnum bogs.
Glob. Change Biol., 7, 591–598, https://doi.org/10.1046/j.1365-2486.2001.00433.x,
2001.
Bortoluzzi, E., Epron, D., Siegenthaler, A., Gilbert, D., and Buttler, A.:
Carbon balance of a European mountain bog at contrasting stages of
regeneration, New Phytol., 172, 708–718, https://doi.org/10.1111/j.1469-8137.2006.01859.x, 2006.
Bragazza, L., Buttler, A., Siegenthaler, A., and Mitchell, E. A.: Plant litter decomposition and nutrient release in peatlands, Geophys. Monogr. Series, 184, 99–110, https://doi.org/10.1029/2008GM000815, 2009.
Buttler, A., Robroek, B. J., Laggoun-Défarge, F., Jassey, V. E.,
Pochelon, C., Bernard, G., Delarue, F., Gogo, S., Mariotte, P., Mitchell E.
A., and Bragazza, L.: Experimental warming interacts with soil moisture to
discriminate plant responses in an ombrotrophic peatland, J.
Veg. Sci., 26, 964–974, https://doi.org/10.1111/jvs.12296, 2015.
Chambers, F. M., Mauquoy, D., and Todd, P. A.: Recent rise to dominance of
Molinia caerulea in environmentally sensitive areas: new perspectives from
palaeoecological data, J. Appl. Ecol., 36, 719–733, https://doi.org/10.1046/j.1365-2664.1999.00435.x, 1999.
Chapin, F., Woodwell, G., Randerson, J., Lovett, G., Rastetter, E.,
Baldocchi, D., Clark, D., Harman, M., Schimel, D., Valentini, R., Wirth, C.,
Aber, J., Cole, J., Giblin, A., Goulden, M., Harden, J., Heimann, M.,
Howarth, R., Matson, P., McGuire, A., Melillo, J., Mooney, H., Neff, J.,
Houghton, R., Pace, M., Ryan, M., Running, S., Sala, O., Schlesinger, W., and
Schulze, E.-D.: Reconciling carbon-cycle concepts, terminology, and methods,
Ecosystems, 9, 1041–1050, https://doi.org/10.1007/s10021-005-0105-7, 2006.
Crow, S. E. and Wieder, R. K.: Sources of CO2 emission from a northern
peatland: root respiration, exudation, and decomposition, Ecology, 86,
1825–1834, https://doi.org/10.1890/04-1575, 2005.
D'Angelo, B.: Variabialité spatio-temporelle des émissions de GES
dans une tourbière à Sphaignes: effets sur le bilan carbone,
Doctoral dissertation, Université d'Orléans, 53–108, 2015.
D'Angelo, B., Gogo, S., Laggoun-Défarge, F., Le Moing, F., Jégou, F.,
and Guimbaud, C.: Soil temperature synchronisation improves representation
of diel variability of ecosystem respiration in Sphagnum peatlands,
Agr. Forest Meteorol., 223, 95–102, https://doi.org/10.1016/j.agrformet.2016.03.021, 2016.
Dieleman, C. M., Branfireun, B. A., McLaughlin, J. W., and Lindo, Z.: Climate
change drives a shift in peatland ecosystem plant community: implications
for ecosystem function and stability, Glob. Change Biol., 21, 388–395,
https://doi.org/10.1111/gcb.12643, 2015.
Fenner, N., Ostle, N. J., McNamara, N., Sparks, T., Harmens, H., Reynolds,
B., and Freeman, C.: Elevated CO2 effects on peatland plant community
carbon dynamics and DOC production, Ecosystems, 10, 635–647, https://doi.org/10.1007/s10021-007-9051-x, 2007.
Girkin, N. T., Turner, B. L., Ostle, N., Craigon, J., and Sjögersten,
S.: Root exudate analogues accelerate CO2 and CH4 production in tropical
peat, Soil Biol. Biochem., 117, 48–55, https://doi.org/10.1016/j.soilbio.2017.11.008, 2018.
Gogo, S., Laggoun-Défarge, F., Delarue, F., and Lottier, N.: Invasion of
a Sphagnum-peatland by Betula spp and Molinia caerulea impacts organic
matter biochemistry, Implications for carbon and nutrient cycling,
Biogeochemistry, 106, 53–69, https://doi.org/10.1007/s10533-010-9433-6, 2011.
Gogo, S., Laggoun-Défarge, F., Merzouki, F., Mounier, S.,
Guirimand-Dufour, A., Jozja, N., Hughet, A., Delarue, F., and Défarge,
C.: In situ and laboratory non-additive litter mixture effect on C dynamics
of Sphagnum rubellum and Molinia caerulea litters, J. Soil.
Sediment., 16, 13–27, https://doi.org/10.1007/s11368-015-1178-3, 2016.
Green, S. M. and Baird, A. J.: A mesocosm study of the role of the sedge
Eriophorum angustifolium in the efflux of methane – including that due to
episodic ebullition – from peatlands, Plant Soil, 351, 207–218,
https://doi.org/10.1007/s11104-011-0945-1, 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.
Guimbaud, C., Catoire, V., Gogo, S., Robert, C., Chartier, M.,
Laggoun-Défarge, F., Grossel, A., Albéric, P., Pomathiod, L.,
Nicoullaud, B., and Richard, G.: A portable infrared laser spectrometer for
flux measurements of trace gases at the geosphere–atmosphere interface,
Meas. Sci. Technol., 22, 075601, https://doi.org/10.1088/0957-0233/22/7/075601, 2011.
Guimbaud, C., Noel, C., Chartier, M., Catoire, V., Blessing, M., Gourry, J.
C., and Robert, C.: A quantum cascade laser infrared spectrometer for
CO2 stable isotope analysis: Field implementation at a hydrocarbon
contaminated site under bio-remediation, J. Environ. Sci.,
40, 60–74, https://doi.org/10.1016/j.jes.2015.11.015, 2016.
Hornibrook, E. R., Longstaffe, F. J., and Fyfe, W. S.: Spatial distribution
of microbial methane production pathways in temperate zone wetland soils:
stable carbon and hydrogen isotope evidence, Geochim. Cosmochim.
Ac., 61, 745–753, https://doi.org/10.1016/S0016-7037(96)00368-7, 1997.
Kandel, T. P., Elsgaard, L., and Lærke, P. E.: Measurement and modelling
of CO2 flux from a drained fen peatland cultivated with reed canary grass
and spring barley, Gcb Bioenergy, 5, 548–561, https://doi.org/10.1111/gcbb.12020,
2013.
Krab, E. J., Berg, M. P., Aerts, R., van Logtestijn, R. S., and Cornelissen,
J. H.: Vascular plant litter input in subarctic peat bogs changes Collembola
diets and decomposition patterns, Soil Biol. Biochem., 63,
106–115, https://doi.org/10.1016/j.soilbio.2013.03.032, 2013.
Kuzyakov, Y., Ehrensberger, H., and Stahr, K.: Carbon partitioning and
below-ground translocation by Lolium perenne, Soil Biol. Biochem.,
33, 61–74, https://doi.org/10.1016/S0038-0717(00)00115-2, 2001.
Leroy, F., Gogo, S., Guimbaud, C., Bernard-Jannin, L., Hu, Z., and
Laggoun-Défarge, F.: Vegetation composition controls temperature
sensitivity of CO2 and CH4 emissions and DOC concentration in peatlands,
Soil Biol. Biochem., 107, 164–167, https://doi.org/10.1016/j.soilbio.2017.01.005, 2017.
Leroy, F., Gogo, S., Guimbaud, C., Francez, A. J., Zocatelli, R., Défarge, C., Bernard-Jannin, L., Hu, Z., and Laggoun-Défarge, F.: Response of C and N cycles to N fertilization in Sphagnum and Molinia-dominated peat mesocosms, J. Environ. Sci., 77, 264–272, https://doi.org/10.1016/j.jes.2018.08.003, 2019.
Mahadevan, P., Wofsy, S. C., Matross, D. M., Xiao, X., Dunn, A. L., Lin, J.
C., Gerbig, C., Munger, J. W., Chow., V. Y., and Gottlieb, E. W.: A
satellite-based biosphere parameterization for net ecosystem CO2 exchange:
Vegetation Photosynthesis and Respiration Model (VPRM), Global
Biogeochem. Cy., 22, https://doi.org/10.1029/2006GB002735, 2008.
Moore, T. R., Bubier, J. L., and Bledzki, L.: Litter decomposition in
temperate peatland ecosystems: the effect of substrate and site, Ecosystems,
10, 949–963, https://doi.org/10.1007/s10021-007-9064-5, 2007.
Myhre, G., Shindell, D., Bréon, F. M., Collins, W., Fuglestvedt, J.,
Huang, J., ., Koch, D., Lamarque, J.F., Lee, D., Mendoza, B., Nakajima, T.,
Robock A., Stephens, G., Takemura, T., and Nakajima, T.: Anthropogenic and
Natural Radiative Forcing, in: Climate Change 2013: The Physical Science
Basis, Contribution of Working Group 1 to the Fifth Assessment Report of the
Intergovernmental Panel on Climate Change, 8, 659–740, 2013.
Neff, J. C. and Hooper, D. U.: Vegetation and climate controls on potential
CO2, DOC and DON production in northern latitude soils, Glob. Change
Biol., 8, 872–884, https://doi.org/10.1046/j.1365-2486.2002.00517.x, 2002.
Noyce, G. L., Varner, R. K., Bubier, J. L., and Frolking, S.: Effect of Carex
rostrata on seasonal and interannual variability in peatland methane
emissions, J. Geophys. Res.-Biogeo., 119, 24–34,
https://doi.org/10.1002/2013JG002474, 2014.
Ouyang, X., Lee, S. Y., and Connolly, R. M.: The role of root decomposition
in global mangrove and saltmarsh carbon budgets, Earth-Sci. Rev., 166,
53–63, https://doi.org/10.1016/j.earscirev.2017.01.004, 2017.
Peichl, M., Öquist, M., Löfvenius, M. O., Ilstedt, U., Sagerfors,
J., Grelle, A., Lindroth, A., and Nilsson, M. B.: A 12-year record reveals
pre-growing season temperature and water table level threshold effects on
the net carbon dioxide exchange in a boreal fen, Environ. Res.
Lett., 9, 055006, https://doi.org/10.1088/1748-9326/9/5/055006, 2014.
R Core Team: R: A language and environment for statistical computing, R
Foundation for Statistical Computing, Vienna, Austria, available at:
https://www.R-project.org/ (last access: 24 October 2019), 2016.
Ritson, J. P., Brazier, R. E., Graham, N. J. D., Freeman, C., Templeton, M. R., and Clark, J. M.: The effect of drought on dissolved organic carbon (DOC) release from peatland soil and vegetation sources, Biogeosciences, 14, 2891–2902, https://doi.org/10.5194/bg-14-2891-2017, 2017.
Strakova, P., Niemi, R. M., Freeman, C., Peltoniemi, K., Toberman, H.,
Heiskanen, I., Fritze, H., and Laiho, R.: Litter type affects the activity of
aerobic decomposers in a boreal peatland more than site nutrient and water
table regimes, Biogeosciences, 8, 2741–2755, https://doi.org/10.5194/bg-8-2741-2011,
2011.
Ström, L., Tagesson, T., Mastepanov, M., and Christensen, T. R.: Presence of Eriophorum scheuchzeri enhances substrate availability and methane emission in an Arctic wetland, Soil Biol. Biochem., 45, 61–70, https://doi.org/10.1016/j.soilbio.2011.09.005, 2012.
Taylor, K., Rowland, A. P., and Jones, H. E.: Molinia caerulea (L.) Moench,
J. Ecol., 89, 126–144, https://doi.org/10.1046/j.1365-2745.2001.00534.x,
2001.
Trudeau, N. C., Garneau, M., and Pelletier, L.: Interannual variability in
the CO2 balance of a boreal patterned fen, James Bay, Canada,
Biogeochemistry, 118, 371–387, https://doi.org/10.1007/s10533-013-9939-9, 2014.
Tuittila, E. S., Vasander, H., and Laine, J.: Sensitivity of C Sequestration
in Reintroduced Sphagnum to Water-Level Variation in a Cutaway Peatland,
Restor. Ecol., 12, 483–493, https://doi.org/10.1111/j.1061-2971.2004.00280.x,
2004.
Turetsky, M. R.: The role of bryophytes in carbon and nitrogen cycling,
Bryologist, 106, 395–409, https://doi.org/10.1639/05, 2003.
Saarnio, S., Wittenmayer, L., and Merbach, W.: Rhizospheric exudation of
Eriophorum vaginatum L. – potential link to methanogenesis, Plant Soil,
267, 343–355, https://doi.org/10.1007/s11104-005-0140-3, 2004.
van Breemen, N.: How Sphagnum bogs down other plants, Trend. Ecol.
Evol., 10, 270–275, https://doi.org/10.1016/0169-5347(95)90007-1, 1995.
Ward, S. E., Ostle, N. J., Oakley, S., Quirk, H., Henrys, P. A., and
Bardgett, R. D.: Warming effects on greenhouse gas fluxes in peatlands are
modulated by vegetation composition, Ecol. Lett., 16, 1285–1293,
https://doi.org/10.1111/ele.12167, 2013.
Wright, E. L., Black, C. R., Turner, B. L., and Sjögersten, S.:
Environmental controls of temporal and spatial variability in CO2 and CH4
fluxes in a neotropical peatland, Glob. Change Biol., 19, 3775–3789, https://doi.org/10.1111/gcb.12330,
2013.
Yu, Z., Loisel, J., Brosseau, D. P., Beilman, D. W., and Hunt, S. J.: Global
peatland dynamics since the Last Glacial Maximum, Geophys. Res.
Lett., 37, https://doi.org/10.1029/2010GL043584, 2010.
Short summary
This study demonstrates the implications of Molinia caerulea colonization in Sphagnum peatland on the C fluxes by enhancing the CO2 uptake by photosynthesis (but which led to higher CO2 and CH4 emissions) and also on the parameters controlling it (by increasing the temperature sensitivity of the CH4 emissions). Furthermore, roots and litter of Molinia caerulea could provide additional substrates for C emissions and should be taken into account in further works.
This study demonstrates the implications of Molinia caerulea colonization in Sphagnum peatland...
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