Articles | Volume 15, issue 3
https://doi.org/10.5194/bg-15-885-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-15-885-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
12 Feb 2018
Research article |
| 12 Feb 2018
Differential response of carbon cycling to long-term nutrient input and altered hydrological conditions in a continental Canadian peatland
Sina Berger
CORRESPONDING AUTHOR
University of Muenster, Institute of Landscape Ecology,
Ecohydrology and Biogeochemistry Group, Heisenbergstraße 2,
48149 Muenster, Germany
University of Guelph, School of
Environmental Sciences, 50 Stone Road East, Guelph, Ontario, N1G 2W1, Canada
Karlsruhe Institute of Technology, Institute of Meteorology and
Climate Research (IMK-IFU), Kreuzeckbahnstraße 19,
82467 Garmisch-Partenkirchen, Germany
Leandra S. E. Praetzel
University of Muenster, Institute of Landscape Ecology,
Ecohydrology and Biogeochemistry Group, Heisenbergstraße 2,
48149 Muenster, Germany
University of Guelph, School of
Environmental Sciences, 50 Stone Road East, Guelph, Ontario, N1G 2W1, Canada
Marie Goebel
University of Muenster, Institute of Landscape Ecology,
Ecohydrology and Biogeochemistry Group, Heisenbergstraße 2,
48149 Muenster, Germany
University of Guelph, School of
Environmental Sciences, 50 Stone Road East, Guelph, Ontario, N1G 2W1, Canada
Christian Blodau
University of Muenster, Institute of Landscape Ecology,
Ecohydrology and Biogeochemistry Group, Heisenbergstraße 2,
48149 Muenster, Germany
University of Guelph, School of
Environmental Sciences, 50 Stone Road East, Guelph, Ontario, N1G 2W1, Canada
deceased, 28 July 2016
Klaus-Holger Knorr
CORRESPONDING AUTHOR
University of Muenster, Institute of Landscape Ecology,
Ecohydrology and Biogeochemistry Group, Heisenbergstraße 2,
48149 Muenster, Germany
Related authors
No articles found.
Carrie L. Thomas, Boris Jansen, Sambor Czerwiński, Mariusz Gałka, Klaus-Holger Knorr, E. Emiel van Loon, Markus Egli, and Guido L. B. Wiesenberg
Biogeosciences, 20, 4893–4914, https://doi.org/10.5194/bg-20-4893-2023, https://doi.org/10.5194/bg-20-4893-2023, 2023
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Peatlands are vital terrestrial ecosystems that can serve as archives, preserving records of past vegetation and climate. We reconstructed the vegetation history over the last 2600 years of the Beerberg peatland and surrounding area in the Thuringian Forest in Germany using multiple analyses. We found that, although the forest composition transitioned and human influence increased, the peatland remained relatively stable until more recent times, when drainage and dust deposition had an impact.
Laura Clark, Ian B. Strachan, Maria Strack, Nigel T. Roulet, Klaus-Holger Knorr, and Henning Teickner
Biogeosciences, 20, 737–751, https://doi.org/10.5194/bg-20-737-2023, https://doi.org/10.5194/bg-20-737-2023, 2023
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We determine the effect that duration of extraction has on CO2 and CH4 emissions from an actively extracted peatland. Peat fields had high net C emissions in the first years after opening, and these then declined to half the initial value for several decades. Findings contribute to knowledge on the atmospheric burden that results from these activities and are of use to industry in their life cycle reporting and government agencies responsible for greenhouse gas accounting and policy.
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.
Henning Teickner and Klaus-Holger Knorr
SOIL, 8, 699–715, https://doi.org/10.5194/soil-8-699-2022, https://doi.org/10.5194/soil-8-699-2022, 2022
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The chemical quality of biomass can be described with holocellulose (relatively easily decomposable by microorganisms) and Klason lignin (relatively recalcitrant) contents. Measuring both is laborious. In a recent study, models have been proposed which can predict both quicker from mid-infrared spectra. However, it has not been analyzed if these models make correct predictions for biomass in soils and how to improve them. We provide such a validation and a strategy for their improvement.
Cordula Nina Gutekunst, Susanne Liebner, Anna-Kathrina Jenner, Klaus-Holger Knorr, Viktoria Unger, Franziska Koebsch, Erwin Don Racasa, Sizhong Yang, Michael Ernst Böttcher, Manon Janssen, Jens Kallmeyer, Denise Otto, Iris Schmiedinger, Lucas Winski, and Gerald Jurasinski
Biogeosciences, 19, 3625–3648, https://doi.org/10.5194/bg-19-3625-2022, https://doi.org/10.5194/bg-19-3625-2022, 2022
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Methane emissions decreased after a seawater inflow and a preceding drought in freshwater rewetted coastal peatland. However, our microbial and greenhouse gas measurements did not indicate that methane consumers increased. Rather, methane producers co-existed in high numbers with their usual competitors, the sulfate-cycling bacteria. We studied the peat soil and aimed to cover the soil–atmosphere continuum to better understand the sources of methane production and consumption.
Liam Heffernan, Maria A. Cavaco, Maya P. Bhatia, Cristian Estop-Aragonés, Klaus-Holger Knorr, and David Olefeldt
Biogeosciences, 19, 3051–3071, https://doi.org/10.5194/bg-19-3051-2022, https://doi.org/10.5194/bg-19-3051-2022, 2022
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Permafrost thaw in peatlands leads to waterlogged conditions, a favourable environment for microbes producing methane (CH4) and high CH4 emissions. High CH4 emissions in the initial decades following thaw are due to a vegetation community that produces suitable organic matter to fuel CH4-producing microbes, along with warm and wet conditions. High CH4 emissions after thaw persist for up to 100 years, after which environmental conditions are less favourable for microbes and high CH4 emissions.
Ramona J. Heim, Andrey Yurtaev, Anna Bucharova, Wieland Heim, Valeriya Kutskir, Klaus-Holger Knorr, Christian Lampei, Alexandr Pechkin, Dora Schilling, Farid Sulkarnaev, and Norbert Hölzel
Biogeosciences, 19, 2729–2740, https://doi.org/10.5194/bg-19-2729-2022, https://doi.org/10.5194/bg-19-2729-2022, 2022
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Fires will probably increase in Arctic regions due to climate change. Yet, the long-term effects of tundra fires on carbon (C) and nitrogen (N) stocks and cycling are still unclear. We investigated the long-term fire effects on C and N stocks and cycling in soil and aboveground living biomass.
We found that tundra fires did not affect total C and N stocks because a major part of the stocks was located belowground in soils which were largely unaltered by fire.
Leandra Stephanie Emilia Praetzel, Nora Plenter, Sabrina Schilling, Marcel Schmiedeskamp, Gabriele Broll, and Klaus-Holger Knorr
Biogeosciences, 17, 5057–5078, https://doi.org/10.5194/bg-17-5057-2020, https://doi.org/10.5194/bg-17-5057-2020, 2020
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Small lakes are important but variable sources of greenhouse gas emissions. We performed lab experiments to determine spatial patterns and drivers of CO2 and CH4 emission and sediment gas production within a lake. The observed high spatial variability of emissions and production could be explained by the degradability of the sediment organic matter. We did not see correlations between production and emissions and suggest on-site flux measurements as the most accurate way for determing emissions.
Wolfgang Knierzinger, Ruth Drescher-Schneider, Klaus-Holger Knorr, Simon Drollinger, Andreas Limbeck, Lukas Brunnbauer, Felix Horak, Daniela Festi, and Michael Wagreich
E&G Quaternary Sci. J., 69, 121–137, https://doi.org/10.5194/egqsj-69-121-2020, https://doi.org/10.5194/egqsj-69-121-2020, 2020
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We present multi-proxy analyses of a 14C-dated peat core covering the past ⁓5000 years from the ombrotrophic Pürgschachen Moor. Pronounced increases in cultural indicators suggest significant human activity in the Bronze Age and in the period of the late La Tène culture. We found strong, climate-controlled interrelations between the pollen record, the humification degree and the ash content. Human activity is reflected in the pollen record and by heavy metals.
Wiebke Münchberger, Klaus-Holger Knorr, Christian Blodau, Verónica A. Pancotto, and Till Kleinebecker
Biogeosciences, 16, 541–559, https://doi.org/10.5194/bg-16-541-2019, https://doi.org/10.5194/bg-16-541-2019, 2019
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Processes governing CH4 dynamics have been scarcely studied in southern hemispheric bogs. These can be dominated by cushion-forming plants with deep and dense roots suppressing emissions. Here we demonstrate how the spatial distribution of root activity drives a pronounced pattern of CH4 emissions, likewise also possible in densely rooted northern bogs. We conclude that presence of cushion vegetation as a proxy for negligible CH4 emissions from cushion bogs needs to be interpreted with caution.
Xi Wen, Viktoria Unger, Gerald Jurasinski, Franziska Koebsch, Fabian Horn, Gregor Rehder, Torsten Sachs, Dominik Zak, Gunnar Lischeid, Klaus-Holger Knorr, Michael E. Böttcher, Matthias Winkel, Paul L. E. Bodelier, and Susanne Liebner
Biogeosciences, 15, 6519–6536, https://doi.org/10.5194/bg-15-6519-2018, https://doi.org/10.5194/bg-15-6519-2018, 2018
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Rewetting drained peatlands may lead to prolonged emission of the greenhouse gas methane, but the underlying factors are not well described. In this study, we found two rewetted fens with known high methane fluxes had a high ratio of microbial methane producers to methane consumers and a low abundance of methane consumers compared to pristine wetlands. We therefore suggest abundances of methane-cycling microbes as potential indicators for prolonged high methane emissions in rewetted peatlands.
Tanja Broder, Klaus-Holger Knorr, and Harald Biester
Hydrol. Earth Syst. Sci., 21, 2035–2051, https://doi.org/10.5194/hess-21-2035-2017, https://doi.org/10.5194/hess-21-2035-2017, 2017
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This study elucidates controls on temporal variability in DOM concentration and quality in stream water draining a bog and a forested peaty riparian zone, particularly considering drought and storm flow events. DOM quality was monitored using spectrofluorometric indices (SUVA254, SR and FI) and PARAFAC modeling of EEMs. DOM quality depended clearly on hydrologic preconditions and season. Moreover, the forested peaty riparian zone generated most variability in headwater DOM quantity and quality.
H. Biester, K.-H. Knorr, J. Schellekens, A. Basler, and Y.-M. Hermanns
Biogeosciences, 11, 2691–2707, https://doi.org/10.5194/bg-11-2691-2014, https://doi.org/10.5194/bg-11-2691-2014, 2014
S. Strohmeier, K.-H. Knorr, M. Reichert, S. Frei, J. H. Fleckenstein, S. Peiffer, and E. Matzner
Biogeosciences, 10, 905–916, https://doi.org/10.5194/bg-10-905-2013, https://doi.org/10.5194/bg-10-905-2013, 2013
K.-H. Knorr
Biogeosciences, 10, 891–904, https://doi.org/10.5194/bg-10-891-2013, https://doi.org/10.5194/bg-10-891-2013, 2013
C. Estop-Aragonés, K.-H. Knorr, and C. Blodau
Biogeosciences, 10, 421–436, https://doi.org/10.5194/bg-10-421-2013, https://doi.org/10.5194/bg-10-421-2013, 2013
Related subject area
Biogeochemistry: Greenhouse Gases
Enhanced Southern Ocean CO2 outgassing as a result of stronger and poleward shifted southern hemispheric westerlies
Spatial and temporal variability of methane emissions and environmental conditions in a hyper-eutrophic fishpond
Optical and radar Earth observation data for upscaling methane emissions linked to permafrost degradation in sub-Arctic peatlands in northern Sweden
Herbivore–shrub interactions influence ecosystem respiration and biogenic volatile organic compound composition in the subarctic
Methane emissions due to reservoir flushing: a significant emission pathway?
Carbon dioxide and methane fluxes from mounds of African fungus-growing termites
Diel and seasonal methane dynamics in the shallow and turbulent Wadden Sea
Technical note: Skirt chamber – an open dynamic method for the rapid and minimally intrusive measurement of greenhouse gas emissions from peatlands
Seasonal variability of nitrous oxide concentrations and emissions in a temperate estuary
Large contribution of soil N2O emission to the global warming potential of a large-scale oil palm plantation despite changing from conventional to reduced management practices
Reviews and syntheses: Recent advances in microwave remote sensing in support of terrestrial carbon cycle science in Arctic–boreal regions
Simulated methane emissions from Arctic ponds are highly sensitive to warming
Water-table-driven greenhouse gas emission estimates guide peatland restoration at national scale
Identifying landscape hot and cold spots of soil GHG fluxes by combining field measurements and remote sensing data
Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta
Carbon emissions and radiative forcings from tundra wildfires in the Yukon–Kuskokwim River Delta, Alaska
Carbon monoxide (CO) cycling in the Fram Strait, Arctic Ocean
Post-flooding disturbance recovery promotes carbon capture in riparian zones
Regional Assessment and Uncertainty Analysis of Carbon and Nitrogen Balances at cropland scale using the ecosystem model LandscapeDNDC
Meteorological responses of carbon dioxide and methane fluxes in the terrestrial and aquatic ecosystems of a subarctic landscape
Carbon emission and export from the Ket River, western Siberia
Evaluation of wetland CH4 in the Joint UK Land Environment Simulator (JULES) land surface model using satellite observations
Greenhouse gas fluxes in mangrove forest soil in an Amazon estuary
Temporal patterns and drivers of CO2 emission from dry sediments in a groyne field of a large river
Effects of water table level and nitrogen deposition on methane and nitrous oxide emissions in an alpine peatland
Highest methane concentrations in an Arctic river linked to local terrestrial inputs
Seasonal study of the small-scale variability in dissolved methane in the western Kiel Bight (Baltic Sea) during the European heatwave in 2018
Trace gas fluxes from tidal salt marsh soils: implications for carbon–sulfur biogeochemistry
Spatial and temporal variation in δ13C values of methane emitted from a hemiboreal mire: methanogenesis, methanotrophy, and hysteresis
Intercomparison of methods to estimate gross primary production based on CO2 and COS flux measurements
Lateral carbon export has low impact on the net ecosystem carbon balance of a polygonal tundra catchment
The effect of static chamber base on N2O flux in drip irrigation
Controls on autotrophic and heterotrophic respiration in an ombrotrophic bog
Episodic N2O emissions following tillage of a legume–grass cover crop mixture
Variation in CO2 and CH4 fluxes among land cover types in heterogeneous Arctic tundra in northeastern Siberia
Response of vegetation and carbon fluxes to brown lemming herbivory in northern Alaska
Sources of nitrous oxide and the fate of mineral nitrogen in subarctic permafrost peat soils
Data-based estimates of interannual sea–air CO2 flux variations 1957–2020 and their relation to environmental drivers
Evaluating alternative ebullition models for predicting peatland methane emission and its pathways via data–model fusion
Excess soil moisture and fresh carbon input are prerequisites for methane production in podzolic soil
Low biodegradability of particulate organic carbon mobilized from thaw slumps on the Peel Plateau, NT, and possible chemosynthesis and sorption effects
Grazing enhances carbon cycling but reduces methane emission during peak growing season in the Siberian Pleistocene Park tundra site
Ideas and perspectives: Enhancing research and monitoring of carbon pools and land-to-atmosphere greenhouse gases exchange in developing countries
Ignoring carbon emissions from thermokarst ponds results in overestimation of tundra net carbon uptake
Quantification of potential methane emissions associated with organic matter amendments following oxic-soil inundation
Assessing the spatial and temporal variability of greenhouse gas emissions from different configurations of on-site wastewater treatment system using discrete and continuous gas flux measurement
Dimethylated sulfur compounds in the Peruvian upwelling system
Partitioning carbon sources between wetland and well-drained ecosystems to a tropical first-order stream – implications for carbon cycling at the watershed scale (Nyong, Cameroon)
Extreme events driving year-to-year differences in gross primary productivity across the US
Methane gas emissions from savanna fires: what analysis of local burning regimes in a working West African landscape tell us
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.
Guantao Chen, Edzo Veldkamp, Muhammad Damris, Bambang Irawan, Aiyen Tjoa, and Marife D. Corre
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-102, https://doi.org/10.5194/bg-2023-102, 2023
Revised manuscript accepted for BG
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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 four years of treatment, compared with conventional fertilization with herbicide weeding, reduced fertilization with mechanical weeding did not reduce yield and soil greenhouse gas emissions that highlight the legacy effects of over a decade of conventional management prior to the start of experiment.
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 %.
Elizabeth Gachibu Wangari, Ricky Mwangada Mwanake, Tobias Houska, David Kraus, Gretchen Maria Gettel, Ralf Kiese, Lutz Breuer, and Klaus Butterbach-Bahl
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-99, https://doi.org/10.5194/bg-2023-99, 2023
Revised manuscript accepted for BG
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Agricultural landscapes act as sinks or sources of the greenhouse gases (GHG) CO2, CH4 or N2O. Fluxes of these GHGs between ecosystems and the atmosphere are controlled by various physico-chemical and biological processes. Therefore, fluxes depend on environmental conditions such as moisture, temperature, or soil parameters, which results in large spatial and temporal variations of GHG fluxes. Here we describe an example how this variation may be studied and analysed.
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.
Odysseas Sifounakis, Edwin Haas, Klaus Butterbach-Bahl, and Maria P. Papadopoulou
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-52, https://doi.org/10.5194/bg-2023-52, 2023
Revised manuscript accepted for BG
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We performed a full assessment of the carbon and nitrogen cycle of a cropland ecosystem. An uncertainty analysis and quantification of all carbon and nitrogen fluxes has been deployed. The inventory simulations include greenhouse gas emissions of N2O, NH3 volatilization and NO3 leaching from arable land cultivation for Greece. The inventory reports as well changes of soil organic carbon and nitrogen stocks in arable soils.
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.
Tracy E. Rankin, Nigel T. Roulet, and Tim R. Moore
Biogeosciences, 19, 3285–3303, https://doi.org/10.5194/bg-19-3285-2022, https://doi.org/10.5194/bg-19-3285-2022, 2022
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Peatland respiration is made up of plant and peat sources. How to separate these sources is not well known as peat respiration is not straightforward and is more influenced by vegetation dynamics than previously thought. Results of plot level measurements from shrubs and sparse grasses in a woody bog show that plants' respiration response to changes in climate is related to their different root structures, implying a difference in the mechanisms by which they obtain water resources.
Alison Bressler and Jennifer Blesh
Biogeosciences, 19, 3169–3184, https://doi.org/10.5194/bg-19-3169-2022, https://doi.org/10.5194/bg-19-3169-2022, 2022
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Our field experiment tested if a mixture of a nitrogen-fixing legume and non-legume cover crop could reduce nitrous oxide (N2O) emissions following tillage, compared to the legume grown alone. We found higher N2O following both legume treatments, compared to those without, and lower emissions from the cover crop mixture at one of the two test sites, suggesting that interactions between cover crop types and soil quality influence N2O emissions.
Sari Juutinen, Mika Aurela, Juha-Pekka Tuovinen, Viktor Ivakhov, Maiju Linkosalmi, Aleksi Räsänen, Tarmo Virtanen, Juha Mikola, Johanna Nyman, Emmi Vähä, Marina Loskutova, Alexander Makshtas, and Tuomas Laurila
Biogeosciences, 19, 3151–3167, https://doi.org/10.5194/bg-19-3151-2022, https://doi.org/10.5194/bg-19-3151-2022, 2022
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We measured CO2 and CH4 fluxes in heterogenous Arctic tundra in eastern Siberia. We found that tundra wetlands with sedge and grass vegetation contributed disproportionately to the landscape's ecosystem CO2 uptake and CH4 emissions to the atmosphere. Moreover, we observed high CH4 consumption in dry tundra, particularly in barren areas, offsetting part of the CH4 emissions from the wetlands.
Jessica Plein, Rulon W. Clark, Kyle A. Arndt, Walter C. Oechel, Douglas Stow, and Donatella Zona
Biogeosciences, 19, 2779–2794, https://doi.org/10.5194/bg-19-2779-2022, https://doi.org/10.5194/bg-19-2779-2022, 2022
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Tundra vegetation and the carbon balance of Arctic ecosystems can be substantially impacted by herbivory. We tested how herbivory by brown lemmings in individual enclosure plots have impacted carbon exchange of tundra ecosystems via altering carbon dioxide (CO2) and methane (CH4) fluxes. Lemmings significantly decreased net CO2 uptake while not affecting CH4 emissions. There was no significant difference in the subsequent growing season due to recovery of the vegetation.
Jenie Gil, Maija E. Marushchak, Tobias Rütting, Elizabeth M. Baggs, Tibisay Pérez, Alexander Novakovskiy, Tatiana Trubnikova, Dmitry Kaverin, Pertti J. Martikainen, and Christina Biasi
Biogeosciences, 19, 2683–2698, https://doi.org/10.5194/bg-19-2683-2022, https://doi.org/10.5194/bg-19-2683-2022, 2022
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N2O emissions from permafrost soils represent up to 11.6 % of total N2O emissions from natural soils, and their contribution to the global N2O budget will likely increase due to climate change. A better understanding of N2O production from permafrost soil is needed to evaluate the role of arctic ecosystems in the global N2O budget. By studying microbial N2O production processes in N2O hotspots in permafrost peatlands, we identified denitrification as the dominant source of N2O in these surfaces.
Christian Rödenbeck, Tim DeVries, Judith Hauck, Corinne Le Quéré, and Ralph F. Keeling
Biogeosciences, 19, 2627–2652, https://doi.org/10.5194/bg-19-2627-2022, https://doi.org/10.5194/bg-19-2627-2022, 2022
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The ocean is an important part of the global carbon cycle, taking up about a quarter of the anthropogenic CO2 emitted by burning of fossil fuels and thus slowing down climate change. However, the CO2 uptake by the ocean is, in turn, affected by variability and trends in climate. Here we use carbon measurements in the surface ocean to quantify the response of the oceanic CO2 exchange to environmental conditions and discuss possible mechanisms underlying this response.
Shuang Ma, Lifen Jiang, Rachel M. Wilson, Jeff P. Chanton, Scott Bridgham, Shuli Niu, Colleen M. Iversen, Avni Malhotra, Jiang Jiang, Xingjie Lu, Yuanyuan Huang, Jason Keller, Xiaofeng Xu, Daniel M. Ricciuto, Paul J. Hanson, and Yiqi Luo
Biogeosciences, 19, 2245–2262, https://doi.org/10.5194/bg-19-2245-2022, https://doi.org/10.5194/bg-19-2245-2022, 2022
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The relative ratio of wetland methane (CH4) emission pathways determines how much CH4 is oxidized before leaving the soil. We found an ebullition modeling approach that has a better performance in deep layer pore water CH4 concentration. We suggest using this approach in land surface models to accurately represent CH4 emission dynamics and response to climate change. Our results also highlight that both CH4 flux and belowground concentration data are important to constrain model parameters.
Mika Korkiakoski, Tiia Määttä, Krista Peltoniemi, Timo Penttilä, and Annalea Lohila
Biogeosciences, 19, 2025–2041, https://doi.org/10.5194/bg-19-2025-2022, https://doi.org/10.5194/bg-19-2025-2022, 2022
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We measured CH4 fluxes and production and oxidation potentials from irrigated and non-irrigated podzolic soil in a boreal forest. CH4 sink was smaller at the irrigated site but did not cause CH4 emission, with one exception. We also showed that under laboratory conditions, not only wet conditions, but also fresh carbon, are needed to make podzolic soil into a CH4 source. Our study provides important data for improving the process models describing the upland soil CH4 dynamics.
Sarah Shakil, Suzanne E. Tank, Jorien E. Vonk, and Scott Zolkos
Biogeosciences, 19, 1871–1890, https://doi.org/10.5194/bg-19-1871-2022, https://doi.org/10.5194/bg-19-1871-2022, 2022
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Permafrost thaw-driven landslides in the western Arctic are increasing organic carbon delivered to headwaters of drainage networks in the western Canadian Arctic by orders of magnitude. Through a series of laboratory experiments, we show that less than 10 % of this organic carbon is likely to be mineralized to greenhouse gases during transport in these networks. Rather most of the organic carbon is likely destined for burial and sequestration for centuries to millennia.
Wolfgang Fischer, Christoph K. Thomas, Nikita Zimov, and Mathias Göckede
Biogeosciences, 19, 1611–1633, https://doi.org/10.5194/bg-19-1611-2022, https://doi.org/10.5194/bg-19-1611-2022, 2022
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Arctic permafrost ecosystems may release large amounts of carbon under warmer future climates and may therefore accelerate global climate change. Our study investigated how long-term grazing by large animals influenced ecosystem characteristics and carbon budgets at a Siberian permafrost site. Our results demonstrate that such management can contribute to stabilizing ecosystems to keep carbon in the ground, particularly through drying soils and reducing methane emissions.
Dong-Gill Kim, Ben Bond-Lamberty, Youngryel Ryu, Bumsuk Seo, and Dario Papale
Biogeosciences, 19, 1435–1450, https://doi.org/10.5194/bg-19-1435-2022, https://doi.org/10.5194/bg-19-1435-2022, 2022
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As carbon (C) and greenhouse gas (GHG) research has adopted appropriate technology and approach (AT&A), low-cost instruments, open-source software, and participatory research and their results were well accepted by scientific communities. In terms of cost, feasibility, and performance, the integration of low-cost and low-technology, participatory and networking-based research approaches can be AT&A for enhancing C and GHG research in developing countries.
Lutz Beckebanze, Zoé Rehder, David Holl, Christian Wille, Charlotta Mirbach, and Lars Kutzbach
Biogeosciences, 19, 1225–1244, https://doi.org/10.5194/bg-19-1225-2022, https://doi.org/10.5194/bg-19-1225-2022, 2022
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Arctic permafrost landscapes feature many water bodies. In contrast to the terrestrial parts of the landscape, the water bodies release carbon to the atmosphere. We compare carbon dioxide and methane fluxes from small water bodies to the surrounding tundra and find not accounting for the carbon dioxide emissions leads to an overestimation of the tundra uptake by 11 %. Consequently, changes in hydrology and water body distribution may substantially impact the overall carbon budget of the Arctic.
Brian Scott, Andrew H. Baldwin, and Stephanie A. Yarwood
Biogeosciences, 19, 1151–1164, https://doi.org/10.5194/bg-19-1151-2022, https://doi.org/10.5194/bg-19-1151-2022, 2022
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Carbon dioxide and methane contribute to global warming. What can we do? We can build wetlands: they store carbon dioxide and should cause global cooling. But when first built they produce excess methane. Eventually built wetlands will cause cooling, but it may take decades or even centuries. How we build wetlands matters. We show that a common practice, using organic matter, such as manure, can make a big difference whether or not the wetlands we build start global cooling within our lifetime.
Jan Knappe, Celia Somlai, and Laurence W. Gill
Biogeosciences, 19, 1067–1085, https://doi.org/10.5194/bg-19-1067-2022, https://doi.org/10.5194/bg-19-1067-2022, 2022
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Two domestic on-site wastewater treatment systems have been monitored for greenhouse gas (carbon dioxide, methane and nitrous oxide) emissions coming from the process units, soil and vent pipes. This has enabled the net greenhouse gas per person to be quantified for the first time, as well as the impact of pre-treatment on the effluent before being discharged to soil. These decentralised wastewater treatment systems serve approx. 20 % of the population in both Europe and the United States.
Yanan Zhao, Dennis Booge, Christa A. Marandino, Cathleen Schlundt, Astrid Bracher, Elliot L. Atlas, Jonathan Williams, and Hermann W. Bange
Biogeosciences, 19, 701–714, https://doi.org/10.5194/bg-19-701-2022, https://doi.org/10.5194/bg-19-701-2022, 2022
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We present here, for the first time, simultaneously measured dimethylsulfide (DMS) seawater concentrations and DMS atmospheric mole fractions from the Peruvian upwelling region during two cruises in December 2012 and October 2015. Our results indicate low oceanic DMS concentrations and atmospheric DMS molar fractions in surface waters and the atmosphere, respectively. In addition, the Peruvian upwelling region was identified as an insignificant source of DMS emissions during both periods.
Moussa Moustapha, Loris Deirmendjian, David Sebag, Jean-Jacques Braun, Stéphane Audry, Henriette Ateba Bessa, Thierry Adatte, Carole Causserand, Ibrahima Adamou, Benjamin Ngounou Ngatcha, and Frédéric Guérin
Biogeosciences, 19, 137–163, https://doi.org/10.5194/bg-19-137-2022, https://doi.org/10.5194/bg-19-137-2022, 2022
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We monitor the spatio-temporal variability of organic and inorganic carbon (C) species in the tropical Nyong River (Cameroon), across groundwater and increasing stream orders. We show the significant contribution of wetland as a C source for tropical rivers. Thus, ignoring the river–wetland connectivity might lead to the misrepresentation of C dynamics in tropical watersheds. Finally, total fluvial carbon losses might offset ~10 % of the net C sink estimated for the whole Nyong watershed.
Alexander J. Turner, Philipp Köhler, Troy S. Magney, Christian Frankenberg, Inez Fung, and Ronald C. Cohen
Biogeosciences, 18, 6579–6588, https://doi.org/10.5194/bg-18-6579-2021, https://doi.org/10.5194/bg-18-6579-2021, 2021
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This work builds a high-resolution estimate (500 m) of gross primary productivity (GPP) over the US using satellite measurements of solar-induced chlorophyll fluorescence (SIF) from the TROPOspheric Monitoring Instrument (TROPOMI) between 2018 and 2020. We identify ecosystem-specific scaling factors for estimating gross primary productivity (GPP) from TROPOMI SIF. Extreme precipitation events drive four regional GPP anomalies that account for 28 % of year-to-year GPP differences across the US.
Paul Laris, Moussa Koné, Fadiala Dembélé, Christine M. Rodrigue, Lilian Yang, Rebecca Jacobs, and Quincy Laris
Biogeosciences, 18, 6229–6244, https://doi.org/10.5194/bg-18-6229-2021, https://doi.org/10.5194/bg-18-6229-2021, 2021
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Savanna fires play a key role in the global carbon cycle because they release methane. Although it burns the most, there are few studies from West Africa. We conducted 36 experimental fires according to local practice to collect smoke samples. We found that fires set early in the season had higher methane emissions than those set later, and head fires had double the emissions of backfires. We conclude policies to reduce emissions will not have the desired effects if fire type is not considered.
Cited articles
Alstad, K. P. and Whiticar, M. J.: Carbon and hydrogen isotope ratio
characterization of methane dynamics for Fluxnet peatland ecosystems, Org.
Geochem., 42, 548–558, 2011.
Ballantyne, D. M., Hribljan, J. A., Pypker, T. G., and Chimner, R. A.:
Long-term water table manipulations alter peatland gaseous carbon fluxes in
northern Michigan, Wetl. Ecol. Manag., 22, 35–47, 2014.
Berger, S., Gebauer, G., Blodau, C., and Knorr, K.-H.: Peatlands in
a eutrophic world – assessing the state of a poor fen-bog transition in
southern Ontario, Canada, after long term nutrient Input and altered
hydrological conditions, Soil Biol. Biochem., 114, 131–144, 2017.
Bellisario, L. M., Bubier, J. L., and Moore, T. R.: Controls on CH4
emissions from a northern peatland, Global Biogeochem. Cy., 13, 81–91, 1999.
Blodau, C.: Carbon cycling in peatlands – a review of processes and
controls, Environ. Rev., 10, 111–134, 2002.
Blodau, C., Basiliko, N., and Moore, T. R.: Carbon turnover in peatland
mesocosms exposed to different water table levels, Biogeochemistry, 67,
331–351, 2004.
Bragazza, L.: A decade of plant species changes on a mire in the Italian
Alps: vegetation-controlled or climate-driven mechanisms?, Climatic Change,
77, 415–429, 2006.
Bragazza, L., Siffi, C., Lacumin, P., and Gerdol, R.: Mass loss and nutrient
release during litter decay in peatland: the role of microbial adaptability
to litter chemistry, Soil Biol. Biochem., 39, 257–267, 2007.
Bragazza, L., Buttler, A., Habermacher, J., Brancaleoni, L., Gerdol, R.,
Fritze, H., Hanjík, P., Laiho, R., and Johnson, D.: High nitrogen
deposition alters the decomposition of bog plant litter and reduces carbon
accumulation, Glob. Change Biol., 18, 1163–1172, 2012.
Bragazza, L., Parisod, J., Buttler, A., and Bardgett, R. D.: Biogeochemical
plant-soil microbe feedback in response to climate warming in peatlands, Nat.
Clim. Change, 3, 273–277, 2013.
Bragazza, L., Bardgett, R. D., Mitchell, E. A. D., and Buttler, A.: Linking
soil microbial communities to vascular plant abundance along a climate
gradient, New Phytol., 205, 1175–1182, 2015.
Bragazza, L., Buttler, A., Robroek, B., Albrecht, R., Zaccone, C.,
Jassey, V., and Signarbieux, C.: Persistent high temperature and low
precipitation reduce peat carbon accumulation, Glob. Change Biol., 22,
4114–4123, 2016.
Broder, T., Blodau, C., Biester, H., and Knorr, K. H.: Peat decomposition
records in three pristine ombrotrophic bogs in southern Patagonia,
Biogeosciences, 9, 1479–1491, https://doi.org/10.5194/bg-9-1479-2012, 2012.
Bubier, J. L., Moore, T. R., Bellisario, L., Comer, N. T., and Crill, P. M.:
Ecological controls on methane emissions from a northern peatland complex in
the zone of discontinuous permafrost, Manitoba, Canada, Global Biogeochem.
Cy., 9, 455–470, 1995.
Bubier, J. L., Moore, T. R., and Bledzki, L. A.: Effects of nutrient addition
on vegetation and carbon cycling in an ombrotrophic bog, Glob. Change Biol.,
13, 1168–1186, 2007.
Burger, M., Berger, S., Spangenberg, I., and Blodau, C.: Summer fluxes of
methane and carbon dioxide from a pond and floating mat in a continental
Canadian peatland, Biogeosciences, 13, 3777–3791,
https://doi.org/10.5194/bg-13-3777-2016, 2016.
Chanton, J. P.: The effect of gas transport on the isotope signature of
methane in wetlands, Org. Geochem., 36, 753–768, 2005.
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, 2000.
Conrad, R.: Soil microorganisms as controllers of atmospheric trace gases
(H−2, CO, CH4, OCS, N2O and NO), Microbiol. Mol. Biol. Rev., 60,
609–640, 1996.
Conrad, R.: Quantification of methanogenic pathways using stable carbon
isotopic signatures. A review and a proposal, Org. Geochem., 36, 739–752,
2005.
Eriksson, T., Öquist, M. G., and Nilsson, M. B.: Production and oxidation
of methane in a boreal mire after a decade of increased temperature and
nitrogen and sulfur deposition, Glob. Change Biol., 16, 2130–2144, 2010.
Gray, A., Levy, P. E., Cooper, M. D. A., Jones, T., Gaiawyn, J.,
Leeson, S. R., Ward, S. E., Dinsmore, K. J., Sheppard, L. J., Ostle, N. J.,
Evans, C. D., Burden, A., and Zielinski, P.: Methane indicator values for
peatlands: a comparison of species and functional groups, Glob. Change Biol.,
19, 1141–1150, 2013.
Hesslein, R. H.: Insitu sampler for close interval pore water studies,
Limnol. Oceanogr., 21, 912–914, 1976.
Hodgkins, S. B., Tfaily, M. M., McCalley, C. K., Logan, T. A., Crill, P. M.,
Saleska, S. R., Rich, V. I., and Chanton, J. P.: Can changes in peat
chemistry associated with permafrost thaw increase greenhouse gas production,
P. Natl. Acad. Sci. USA, 111, 5819–5824, 2014.
Hoefs, J.: Stable Isotope Geochemistry, 3rd edn., Springer, Berlin, 1987.
Holmes, M. E., Chanton, J. P., Tjaily, M. M., and Ogram, A.: CO2 and
CH4 isotope compositions and production pathways in a tropical
peatland, Global Biogeochem. Cy., 29, 1–18, 2015.
Hornibrook, E. R. C. and Bowes, H. L.: Trophic status impacts both the
magnitude and stable carbon isotope composition of methane flux from
peatlands, Geophys. Res. Lett., 34, L21401, https://doi.org/10.1029/2007GL031231, 2007.
Hornibrook, E. R. C.: The stable carbon isotope composition of methane
produced and emitted from northern peatlands, in: Carbon Cycling in Northern
Peatlands, edited by: Baird, A. J., Belyea, L. R., Comas, X., Reeve, A. S.,
and Slater, L. D., Geoph. Monog. Series, Bd. 184, American Geophysical Union,
Washington, D.C., 187–203, 2009.
Kammann, C., Grünhage, L., and Jäger, H.-J.: A new sampling technique
to monitor concentrations of CH4, N2O and CO2 in air
at well-defined depths in soils with varied water potential, Eur. J. Soil
Sci., 52, 297–303, 2001.
Kim, Y., Ullah, S., Roulet, N. T., and Moore, T. R.: Effect of inundation,
oxygen and temperature on carbon mineralization in boreal ecosystems, Sci.
Total Environ., 511, 381–392, 2015.
Klüpfel, L., Piepenbrock, A., Kappler, A., and Sander, M.: Humic
substances as fully regenerable electron acceptors in recurrently anoxic
environments, Nat. Geosci., 7, 195–200, 2014.
Knorr, K.-H., Oosterwoud, M. R., and Blodau, C.: Experimental drought alters
rates of soil respiration and methanogenesis but not carbon exchange in soil
of a temperate fen, Soil Biol. Biochem., 40, 1781–1791, 2008.
Knorr, K.-H., Lischeid, G., and Blodau, C.: Dynamics of redox processes in a
minerotrophic fen exposed to a water table manipulation, Geoderma, 153,
379–392, 2009.
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, 2004.
Kuiper, J. J., Mooij, W. M., Bragazza, L., and Robroek, B. J. M.: Plant
functional types define magnitude of drought response in peatland CO2
exchange, Ecology, 95, 123–131, 2014.
Laine, J., Harju, P., Timonen, T., Laine, A., Tuittila, E.-S., Minkkinen, K.,
and Vasander, H.: The Intricate Beauty of Sphagnum mosses –
a Finnish Guide to Identification, 2nd amended edition, 2011.
Larmola, T., Bubier, J. L., Kobyljanec, C., Basiliko, N., Juutinen, S.,
Humphreys, E., Preston, M., and Moore, T. R.: Vegetation feedbacks of
nutrient addition lead to a weaker carbon sink in an ombrotrophic bog, Glob.
Change Biol., 19, 3729–3739, 2013.
Levy, P. E., Burden, A., Cooper, M. D. A., Dinsmore, K. J., Drewer, J.,
Evans, C., Fowler, D., Gaiawyn, J., Gray, A., Jones, S. K., Jones, T.,
Mcnamara, N. P., Mills, R., Ostle, N., Sheppard, L. J., Skiba, U.,
Sowerby, A., Ward, S. E., and Zielinski, P.: Methane emissions from soils:
synthesis and analysis of a large UK data set, Glob. Change Biol., 18,
1657–1669, 2012.
Limpens, J., Berendse, F., Blodau, C., Canadell, J. G., Freeman, C.,
Holden, J., Roulet, N., Rydin, H., and Schaepman-Strub, G.: Peatlands and the
carbon cycle: from local processes to global implications – a synthesis,
Biogeosciences, 5, 1475–1491, https://doi.org/10.5194/bg-5-1475-2008, 2008.
Lund, M., Lafleur, P. M., Roulet, N. T., Lindroth, A., Christensen, T. R.,
Aurela, M., Chojnicki, B. H., Flanagan, L. B., Humphreys, E. R., Laurila, T.,
Oechel, W., Olejnik, J., Rinne, J., Schubert, P., and Nilsson, M. B.:
Variability in exchange of CO2 across 12 northern peatland and tundra
sites, Glob. Change Biol., 16, 2436–2448, 2010.
Marushchak, M. E., Friborg, T., Biasi, C., Herbst, M., Johansson, T.,
Kiepe, I., Liimatainen, M., Lind, S. E., Martikainen, P. J., Virtanen, T.,
Soegaard, H., and Shurpali, N. J.: Methane dynamics in the subarctic tundra:
combining stable isotope analyses, plot- and ecosystem-scale flux
measurements, Biogeosciences, 13, 597–608, https://doi.org/10.5194/bg-13-597-2016,
2016.
McCalley, C., Woodcroft, B., Hodgkins, S., Wehr, R., Kim, E.-H., Mondav, R.,
Crill, P., Chanton, J., Rich, V., Tyson, G., and Saleska, S.: Methane
dynamics regulated by microbial community response to permafrost thaw,
Nature, 514, 7523, 478–481, 2014.
Morris, P. J., Waddington, J. M., Benscoter, B. W., and Turetsky, M. R.:
Conceptual frameworks in peatland ecohydrology: looking beyond the
two-layered (acrotelm–catotelm) model, Ecohydrology, 4, 1–11, 2011.
Murphy, K. R., Butler, K. D., Spencer, R. G., Stedmon, C. A., Boehme, J. R.,
and Aiken, G. R.: Measurement of dissolved organic matter fluorescence in
aquatic environments: an interlaboratory comparison, Environ. Sci. Technol.,
44, 9405–9412, 2010.
National Climate Data and Information Archive: Canadian Climate Normals,
Dataset for the climate station Fergus, Shand Dam, 1981 to 2010, available
at: http://climate.weather.gc.ca/climate_normals/index_e.html (last
access: 18 November 2015), 2014.
Niemeyer, J., Chen, Y., and Bollag, J. M.: Characterization of humic acids,
composts, and peat by diffuse reflectance Fourier-Transform Infrared
Spectroscopy, Soil Sci. Soc. Am. J., 56, 135–140, 1992.
Nijp, J. J., Limpens, J., Metselaar, K., van der Zee, S. E. A. T. M.,
Berendse, F., and Robroek, B. J. M.: Can frequent precipitation moderate the
impact of drought on peatmoss carbon uptake in northern peatlands?, New
Phytol., 203, 70–80, 2014.
Ohno, T.: Fluorescence inner-filtering correction for determining the
humification index of dissolved organic matter, Environ. Sci. Technol., 36,
742–746, 2002.
Owen, K. E., Tenhunen, J., Reichstein, M., Wang, Q., Falge, E., Geyer, R.,
Xiao, X. M., Stoy, P., Amman, C., Arain, A., Aubinet, M., Aurela, M.,
Bernhofer, C., Chojnicki, B. H., Grainer, A., Gruenwald, T., Hadley, J.,
Heinsch, B., Hollinger, D., Knohl, A., Kutsch, W., Lohila, A., Meyers, T.,
Moors, E., Moureaux, C., Pilegaard, K., Saigusa, N., Verma, S., Vesala, T.,
and Vogel, C.: Linking flux network measurements to continental scale
simulations: ecosystem carbon dioxide exchange capacity under
non-water-stressed conditions, Glob. Change Biol., 13, 734–760, 2007.
Pack, M. A., Xu, X., Lupascu, M., Kessler, J. D., and Czimczik, C. I.:
A rapid method for preparing low volume CH4 and CO2 gas
samples for 14C AMS analysis, Org. Geochem., 78, 89–98, 2015.
Panikov, N. S., Mastepanov, M. A., and Christensen, T. R.: Membrane probe
array: Technique development and observation of CO2 and CH4 diurnal
oscillations in peat profile, Soil Biol. Biochem., 39, 1712–1723, 2007.
Peuravuori, J. and Pihlaja, K.: Molecular size distribution and spectroscopic
properties of aquatic humic substances, Anal. Chim. Acta, 337, 133–149,
1997.
Popp, T. J., Chanton, J. P., Whiting, and G. J., Grant, N.: Evaluation of
methane in the rhizosphere of a Carex dominated fen in north central Alberta,
Canada, Biogeochemistry, 51, 259–281, 2000.
Robroek, B., Jassey, V. E. J., Kox, M., A. R., Berendsen, R. L.,
Mills, R. T. E., Cécillon, L., Puissant, J., Meima-Franke, M.,
Bakker, P. A. H. M., and Bodelier, P. L. E.: Peatland vascular plant
functional types affect methane dynamics by altering microbial community
structure, J. Ecol., 103, 925–934, 2015.
Rydin, H. and Barber, K. E.: Long-term and fine-scale coexistence of closely
related species, Folia Geobot., 36, 53–61, 2001.
Rydin, H. and Jeglum, J. K.: The Biology of Peatlands, 2nd edn., Oxford
University Press, 2013.
Sander, R.: Compilation of Henry's Law Constants for Inorganic and Organic
Species of Potential Importance in Environmental Chemistry, Max Planck
Institute of Chemistry, Mainz, available at:
http://www.henrys-law.org/henry-3.0.pdf (last access: 1 June 2016),
1999.
Schütz, H., Schroder, P., and Rennenberg, H.: Role of plants in
regulating the methane flux to the atmosphere, in: Trace Gas Emission by
Plants, edited by: Sharkey, T. D., Holland, E. A., and Mooney, H. A.,
Academic Press, NY, 29–69, 1991.
Shannon, R. D. and White, J. R.: A three-year study of controls on methane
emissions from two Michigan peatlands, Biogeochemistry, 27, 35–60, 1994.
Sheppard, L. J., Leith, I. D., Leeson, S. R., van Dijk, N., Field, C., and
Levy, P.: Fate of N in a peatland, Whim bog: immobilisation in the vegetation
and peat, leakage into pore water and losses as N2O depend on the
form of N, Biogeosciences, 10, 149–160, https://doi.org/10.5194/bg-10-149-2013, 2013.
Strack, M., Waller, M. F., and Waddington, J. M.: Sedge succession and
peatland methane dynamics: a potential feedback to climate change,
Ecosystems, 9, 278–287, 2006.
Strom, L., Ekberg, M., Mastepanov, M., and Christensen, T. R.: The effect of
vascular plants on carbon turnover and methane emissions from a tundra
wetland, Glob. Change Biol., 9, 1185–1193, 2003.
Stumm, W. and Morgan, J. J.: Aquatic chemistry. Chemical Equilibria and Rates
in Natural Waters, 3rd edn., Wiley (Environmental Science and Technology),
Hoboken, 1996.
Succow, M. and Joosten, H.: Landschaftsökologische Moorkunde, Zweite,
völlig neu bearbeitete Auflage, 2. Auflage, E. Schweizerbart`sche
Verlagsbuchhandlung, Stuttgart, 2012.
Teh, Y. A., Silver, W. L., Conrad, M. E., Borglin, S. E., and Carlson, C. M.:
Carbon isotope fractionation by methane-oxidizing bacteria, J. Gephys.
Res.:-Biogeosci., 111, G01003, https://doi.org/10.1029/2005JG000053, 2006.
Tilsner, J., Wrage, N., Lauf, J., and Gebauer, G.: Emission of gaseous
nitrogen oxides from an extensively managed grassland in NE Bavaria, Germany.
I. Annual budgets of N2O and NOx emissions,
Biogeochemistry, 63, 229–247, 2003.
Teklemariam, T. A., Lafleur, P. M., Moore, T. R., Roulet, N. T., and
Humphreys, E. R.: The direct and indirect effects of
inter-annualmeteorological variability on ecosystem carbon dioxide exchange
at a temperate ombrotrophic bog, Agr. Forest Meteorol., 150, 1402–1411,
2010.
Tranvik, L. J., Downing, J. A., Cotner, J. B., Loiselle, S. A.,
Striegl, R. G., Ballatore, T. J., Dillon, P., Finlay, K., Fortino, K.,
Knoll, L. B., Kortelainen, P. L., Kutser, T., Larsen, S., Laurion, I.,
Leech, D. M., McCallister, L., McKnight, D. M., Melack, J. M., Overholt, E.,
Porter, J. A., Prairie, Y., Renwick, W. H., Roland, F., Sherman, B. S.,
Schindler, D. W., Sobek, S., Tremblay, A., Vanni, M. J., Verschoor, A. M.,
von Wachenfeldt, E., and Weyhenmeyer, G. A.: Lakes and reservoirs as
regulators of carbon cycling and climate, Limnol. Oceanogr., 54, 2298–2314,
2009.
Turetsky, M. R., Bond-Lamberty, B., Euskirchen, E., Talbot, J., Frolking, S.,
McGuire, M. R., and Tuittila, E.-S.: The resilience and functional role of
moss in boreal and arctic ecosystems, New Phytol., 196, 49–67, 2012.
van den Berg, M., Ingwersen, J., Lamers, M., and Streck, T.: The role of
Phragmites in the CH4 and CO2 fluxes in
a minerotrophic peatland in southwest Germany, Biogeosciences, 13,
6107–6119, https://doi.org/10.5194/bg-13-6107-2016, 2016.
Ward, S. E., Ostle, N. J., Oakley, S., Quirk, H., Henrys, P. A., and
Baedgett, R. D.: Warming effects on greenhouse gas fluxes in peatlands are
modulated by vegetation composition, Ecol. Lett., 16, 1285–1293, 2013.
Wang, M., Moore, T. R., Talbot, J., and Riley, J. L.: The stochiometry of
carbon and nutrients in peat formation, Global Biogeochem. Cy., 29, 113–121,
2015.
Wang, M., Larmola, T., Murphy, M. T., Moore, T. R., and Bubier, J.:
Stoichiometric response of shrubs and mosses to long-term nutrient (N, P and
K) addition in an ombrotrophic peatland, Plant Soil, 400, 403–416, 2016.
Weishaar, J. L., Aiken, G. R., Bergamischi, B. A., Fram, M. S., Fujii, R.,
and Mopper, K.: Evaluation of specific ultraviolet absorbance as an indicator
of the chemical composition and reactivity of dissolved organic carbon,
Environ. Sci. Technol., 37, 4702–4708, 2003.
Whalen, S. C.: Biogeochemistry of methane exchange between natural wetlands
and the atmosphere, Environ. Eng. Sci., 22, 73–94, 2005.
Whalen, S. C., Reeburgh, W. S., and Sandbeck, K. A.: Rapid methane oxidation
in a landfill cover soil, Appl. Environ. Microbiol., 56, 3405–3411, 1990.
Whiticar, M. J.: Carbon and hydrogen isotope systematics of bacterial
formation and oxidation of methane, Chem. Geol., 161, 291–314, 1999.
Whiticar, M. J., Faber, E., and Schoell, M.: Biogenic methane formation in
marine and freshwater environments, CO2 reduction vs. acetate
fermentation – isotope evidence, Geochim. Cosmochim. Ac., 50, 693–709,
1986.
Whiting, G. J. and Chanton, J. P.: Control of the diurnal pattern of the
methane emission from emergent aquatic macrophytes by gas transport
mechanisms, Aquat. Bot., 54, 237–253, 1996.
Wiedermann, M. M., Nordin, A., Gunnarsson, U., Nilsson, M. B., and
Ericson, L.: Global change shifts vegetation and plant-parasite interactions
in a boreal mire, Ecology, 88, 454–464, 2007.
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