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Volume 14, issue 4
Biogeosciences, 14, 755–766, 2017
https://doi.org/10.5194/bg-14-755-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-14-755-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Biogeosciences, 14, 755–766, 2017
https://doi.org/10.5194/bg-14-755-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-14-755-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article 20 Feb 2017
Research article | 20 Feb 2017
Aquatic macrophytes can be used for wastewater polishing but not for purification in constructed wetlands
Yingying Tang et al.
Related authors
Ernandes Sobreira Oliveira Junior, Yingying Tang, Sanne J. P. van den Berg, Leon P. M. Lamers, and Sarian Kosten
Biogeosciences Discuss., https://doi.org/10.5194/bg-2016-297, https://doi.org/10.5194/bg-2016-297, 2016
Manuscript not accepted for further review
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The differential effects of the aquatic plants on greenhouse gas fluxes may be due to plant density and whether or not the plant roots can access the sediment. We therefore looked into the effect of these two variables on water hyacinth greenhouse gas balance using a laboratory experiment. We found that greenhouse gas dynamics were strongly influenced by plant density and rooting. Our findings pinpoint management options that can optimize carbon sequestration and minimize CH4 emissions.
Stefan Theodorus Johannes Weideveld, Weier Liu, Merit van den Berg, Leon Peter Maria Lamers, and Christian Fritz
Biogeosciences Discuss., https://doi.org/10.5194/bg-2020-230, https://doi.org/10.5194/bg-2020-230, 2020
Preprint under review for BG
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Raising the groundwater table trough sub-soil irrigation does not lead to a reduction of GHG emissions from drained peat meadows, even though there was a clear increase in GWT during summer. Most likely, the largest part of the peat oxidation takes place in the top 70 cm of the soil, which stays above the groundwater table with the use of sub-soil irrigation. We conclude that the use of sub-soil irrigation is ineffective as a mitigation measure to sufficiently lower peat oxidation rates.
Eva van den Elzen, Martine A. R. Kox, Sarah F. Harpenslager, Geert Hensgens, Christian Fritz, Mike S. M. Jetten, Katharina F. Ettwig, and Leon P. M. Lamers
Biogeosciences, 14, 1111–1122, https://doi.org/10.5194/bg-14-1111-2017, https://doi.org/10.5194/bg-14-1111-2017, 2017
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Peatlands are important because they sequester large amounts of carbon, for which nitrogen is needed. In peatlands dominated by peat mosses, atmospheric nitrogen is fixed by associated microorganisms. We here show for the first time experimentally that phosphorus availability and acid buffering, both showing large variations among peatlands, can explain the strong differences reported for nitrogen fixation. This improves our understanding of peatland functioning in relation to global change.
Ernandes Sobreira Oliveira Junior, Yingying Tang, Sanne J. P. van den Berg, Leon P. M. Lamers, and Sarian Kosten
Biogeosciences Discuss., https://doi.org/10.5194/bg-2016-297, https://doi.org/10.5194/bg-2016-297, 2016
Manuscript not accepted for further review
Short summary
Short summary
The differential effects of the aquatic plants on greenhouse gas fluxes may be due to plant density and whether or not the plant roots can access the sediment. We therefore looked into the effect of these two variables on water hyacinth greenhouse gas balance using a laboratory experiment. We found that greenhouse gas dynamics were strongly influenced by plant density and rooting. Our findings pinpoint management options that can optimize carbon sequestration and minimize CH4 emissions.
S. F. Harpenslager, G. van Dijk, S. Kosten, J. G. M. Roelofs, A. J. P. Smolders, and L. P. M. Lamers
Biogeosciences, 12, 4739–4749, https://doi.org/10.5194/bg-12-4739-2015, https://doi.org/10.5194/bg-12-4739-2015, 2015
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While pristine, growing peatlands are often considered to be net sinks of carbon dioxide (CO2), fluxes vary considerably and these systems can be net sinks or sources of CO2. To explain part of this huge variation, here we present a phenomenon of peat moss (Sphagnum)-driven CO2 production. Due to the acid excreted by Sphagnum, bicarbonate in the surface water is transformed into CO2. Thus, while these systems have high CO2 fixation rates due to growing Sphagnum, they show a net emission of CO2.
Related subject area
Biogeochemistry: Wetlands
Denitrification and associated nitrous oxide and carbon dioxide emissions from the Amazonian wetlands
Drivers of seasonal- and event-scale DOC dynamics at the outlet of mountainous peatlands revealed by high-frequency monitoring
Comparison of eddy covariance CO2 and CH4 fluxes from mined and recently rewetted sections in a northwestern German cutover bog
Peatland area and carbon over the past 21 000 years – a global process based model investigation
Microtopography is a fundamental organizing structure of vegetation and soil chemistry in black ash wetlands
Interacting effects of vegetation components and water level on methane dynamics in a boreal fen
Low methane emissions from a boreal wetland constructed on oil sand mine tailings
Evidence for preferential protein depolymerization in wetland soils in response to external nitrogen availability provided by a novel FTIR routine
Vascular plants affect properties and decomposition of moss-dominated peat, particularly at elevated temperatures
Saltwater reduces potential CO2 and CH4 production in peat soils from a coastal freshwater forested wetland
Reviews and syntheses: Greenhouse gas exchange data from drained organic forest soils – a review of current approaches and recommendations for future research
Effects of sterilization techniques on chemodenitrification and N2O production in tropical peat soil microcosms
Modelling long-term blanket peatland development in eastern Scotland
Cushion bogs are stronger carbon dioxide net sinks than moss-dominated bogs as revealed by eddy covariance measurements on Tierra del Fuego, Argentina
Humic surface waters of frozen peat bogs (permafrost zone) are highly resistant to bio- and photodegradation
Multi-year methane ebullition measurements from water and bare peat surfaces of a patterned boreal bog
Sulfate deprivation triggers high methane production in a disturbed and rewetted coastal peatland
Rhizosphere to the atmosphere: contrasting methane pathways, fluxes, and geochemical drivers across the terrestrial–aquatic wetland boundary
Multi-year effect of wetting on CH4 flux at taiga–tundra boundary in northeastern Siberia deduced from stable isotope ratios of CH4
Zero to moderate methane emissions in a densely rooted, pristine Patagonian bog – biogeochemical controls as revealed from isotopic evidence
Fluvial organic carbon fluxes from oil palm plantations on tropical peatland
Reviews and syntheses: 210Pb-derived sediment and carbon accumulation rates in vegetated coastal ecosystems – setting the record straight
Response of hydrology and CO2 flux to experimentally altered rainfall frequency in a temperate poor fen, southern Ontario, Canada
Global-change effects on early-stage decomposition processes in tidal wetlands – implications from a global survey using standardized litter
Year-round simulated methane emissions from a permafrost ecosystem in Northeast Siberia
Small spatial variability in methane emission measured from a wet patterned boreal bog
Technical note: A simple approach for efficient collection of field reference data for calibrating remote sensing mapping of northern wetlands
Technical note: Comparison of methane ebullition modelling approaches used in terrestrial wetland models
Geomorphic influences on the contribution of vegetation to soil C accumulation and accretion in Spartina alterniflora marshes
Southern Hemisphere bog persists as a strong carbon sink during droughts
The effect of drought on dissolved organic carbon (DOC) release from peatland soil and vegetation sources
Annual greenhouse gas budget for a bog ecosystem undergoing restoration by rewetting
Temporal changes in photoreactivity of dissolved organic carbon and implications for aquatic carbon fluxes from peatlands
Symbiosis revisited: phosphorus and acid buffering stimulate N2 fixation but not Sphagnum growth
Attaining whole-ecosystem warming using air and deep-soil heating methods with an elevated CO2 atmosphere
Controls on soil organic carbon stocks in tidal marshes along an estuarine salinity gradient
Wetland eco-engineering: measuring and modeling feedbacks of oxidation processes between plants and clay-rich material
Mapping of West Siberian taiga wetland complexes using Landsat imagery: implications for methane emissions
Water level, vegetation composition, and plant productivity explain greenhouse gas fluxes in temperate cutover fens after inundation
High net CO2 and CH4 release at a eutrophic shallow lake on a formerly drained fen
Mercury methylation in paddy soil: source and distribution of mercury species at a Hg mining area, Guizhou Province, China
The fate of 15N-nitrate in mesocosms from five European peatlands differing in long-term nitrogen deposition rate
Spatial and seasonal contrasts of sedimentary organic matter in floodplain lakes of the central Amazon basin
Seasonal dynamics of carbon and nutrients from two contrasting tropical floodplain systems in the Zambezi River basin
Model estimates of climate controls on pan-Arctic wetland methane emissions
Sediment properties and CO2 efflux from intact and cleared temperate mangrove forests
Modeling micro-topographic controls on boreal peatland hydrology and methane fluxes
Natural and anthropogenic methane fluxes in Eurasia: a mesoscale quantification by generalized atmospheric inversion
Hydrologic controls on DOC, As and Pb export from a polluted peatland – the importance of heavy rain events, antecedent moisture conditions and hydrological connectivity
Carbon stocks and soil sequestration rates of tropical riverine wetlands
Jérémy Guilhen, Ahmad Al Bitar, Sabine Sauvage, Marie Parrens, Jean-Michel Martinez, Gwenael Abril, Patricia Moreira-Turcq, and José-Miguel Sánchez-Pérez
Biogeosciences, 17, 4297–4311, https://doi.org/10.5194/bg-17-4297-2020, https://doi.org/10.5194/bg-17-4297-2020, 2020
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The quantity of greenhouse gases (GHGs) released to the atmosphere by human industries and agriculture, such as carbon dioxide (CO2) and nitrous oxide (N2O), has been constantly increasing for the last few decades.
This work develops a methodology which makes consistent both satellite observations and modelling of the Amazon basin to identify and quantify the role of wetlands in GHG emissions. We showed that these areas produce non-negligible emissions and are linked to land use.
Thomas Rosset, Stéphane Binet, Jean-Marc Antoine, Emilie Lerigoleur, François Rigal, and Laure Gandois
Biogeosciences, 17, 3705–3722, https://doi.org/10.5194/bg-17-3705-2020, https://doi.org/10.5194/bg-17-3705-2020, 2020
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Peatlands export a large amount of DOC through inland waters. This study aims at identifying the mechanisms controlling the DOC concentration at the outlet of two mountainous peatlands in the French Pyrenees. Peat water temperature and water table dynamics are shown to drive seasonal- and event-scale DOC concentration variation. According to water recession times, peatlands appear as complexes of different hydrological and biogeochemical units supplying inland waters at different rates.
David Holl, Eva-Maria Pfeiffer, and Lars Kutzbach
Biogeosciences, 17, 2853–2874, https://doi.org/10.5194/bg-17-2853-2020, https://doi.org/10.5194/bg-17-2853-2020, 2020
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We measured greenhouse gas (GHG) fluxes at a bog site in northwestern Germany that has been heavily degraded by peat mining. During the 2-year investigation period, half of the area was still being mined, whereas the remaining half had been rewetted shortly before. We could therefore estimate the impact of rewetting on GHG flux dynamics. Rewetting had a considerable effect on the annual GHG balance and led to increased (up to 84 %) methane and decreased (up to 40 %) carbon dioxide release.
Jurek Müller and Fortunat Joos
Biogeosciences Discuss., https://doi.org/10.5194/bg-2020-110, https://doi.org/10.5194/bg-2020-110, 2020
Revised manuscript accepted for BG
Short summary
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We present an in depth model analysis of transient peatland area and carbon dynamics over the last 22 000 years. Our novel results show that the consideration of both gross positive and negative area changes are necessary to understand the transient evolution of peatlands and their net effect on atmospheric carbon. The study includes the attributions to drivers through factorial simulations, assessments of uncertainty from climate forcing, and determination of the global net carbon balance.
Jacob S. Diamond, Daniel L. McLaughlin, Robert A. Slesak, and Atticus Stovall
Biogeosciences, 17, 901–915, https://doi.org/10.5194/bg-17-901-2020, https://doi.org/10.5194/bg-17-901-2020, 2020
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Many wetland systems exhibit lumpy, or uneven, soil surfaces where higher points are called hummocks and lower points are called hollows. We found that, while hummocks extended only ~ 20 cm above hollow surfaces, they exhibited distinct plant communities, plant growth, and soil properties. Differences between hummocks and hollows were the greatest in wetter sites, supporting the hypothesis that plants create and maintain their own hummocks in response to saturated soil conditions.
Terhi Riutta, Aino Korrensalo, Anna M. Laine, Jukka Laine, and Eeva-Stiina Tuittila
Biogeosciences, 17, 727–740, https://doi.org/10.5194/bg-17-727-2020, https://doi.org/10.5194/bg-17-727-2020, 2020
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We studied the role of plant species groups in peatland methane fluxes under natural conditions and lowered water level. At a natural water level, sedges and mosses increased the fluxes. At a lower water level, the impact of plant groups on the fluxes was small. Only at a high water level did vegetation regulate the fluxes. The results are relevant for assessing peatland methane fluxes in a changing climate, as peatland water level and vegetation are predicted to change.
M. Graham Clark, Elyn R. Humphreys, and Sean K. Carey
Biogeosciences, 17, 667–682, https://doi.org/10.5194/bg-17-667-2020, https://doi.org/10.5194/bg-17-667-2020, 2020
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Natural and restored wetlands typically emit methane to the atmosphere. However, we found that a wetland constructed after oil sand mining in boreal Canada using organic soils from local peatlands had negligible emissions of methane in its first 3 years. Methane production was likely suppressed due to an abundance of alternate inorganic electron acceptors. Methane emissions may increase in the future if the alternate electron acceptors continue to decrease.
Hendrik Reuter, Julia Gensel, Marcus Elvert, and Dominik Zak
Biogeosciences, 17, 499–514, https://doi.org/10.5194/bg-17-499-2020, https://doi.org/10.5194/bg-17-499-2020, 2020
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Using infrared spectroscopy, we developed a routine to disentangle microbial nitrogen (N) and plant N in decomposed litter. In a decomposition experiment in three wetland soils, this routine revealed preferential protein depolymerization as a decomposition-site-dependent parameter, unaffected by variations in initial litter N content. In Sphagnum peat, preferential protein depolymerization led to a N depletion of still-unprocessed litter tissue, i.e., a gradual loss of litter quality.
Lilli Zeh, Theresa Marie Igel, Judith Schellekens, Juul Limpens, Luca Bragazza, and Karsten Kalbitz
Biogeosciences Discuss., https://doi.org/10.5194/bg-2019-503, https://doi.org/10.5194/bg-2019-503, 2020
Revised manuscript accepted for BG
Kevan J. Minick, Bhaskar Mitra, Asko Noormets, and John S. King
Biogeosciences, 16, 4671–4686, https://doi.org/10.5194/bg-16-4671-2019, https://doi.org/10.5194/bg-16-4671-2019, 2019
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Sea level rise alters hydrology and vegetation in coastal wetlands. We studied effects of freshwater, saltwater, and wood on soil microbial activity in a freshwater forested wetland. Saltwater reduced CO2/CH4 production compared to freshwater, suggesting large changes in greenhouse gas production and microbial activity are possible due to saltwater intrusion into freshwater wetlands but that the availability of C in the form of dead wood (as forests transition to marsh) may alter the magnitude.
Jyrki Jauhiainen, Jukka Alm, Brynhildur Bjarnadottir, Ingeborg Callesen, Jesper R. Christiansen, Nicholas Clarke, Lise Dalsgaard, Hongxing He, Sabine Jordan, Vaiva Kazanavičiūtė, Leif Klemedtsson, Ari Lauren, Andis Lazdins, Aleksi Lehtonen, Annalea Lohila, Ainars Lupikis, Ülo Mander, Kari Minkkinen, Åsa Kasimir, Mats Olsson, Paavo Ojanen, Hlynur Óskarsson, Bjarni D. Sigurdsson, Gunnhild Søgaard, Kaido Soosaar, Lars Vesterdal, and Raija Laiho
Biogeosciences, 16, 4687–4703, https://doi.org/10.5194/bg-16-4687-2019, https://doi.org/10.5194/bg-16-4687-2019, 2019
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We collated peer-reviewed publications presenting GHG flux data for drained organic forest soils in boreal and temperate climate zones, focusing on data that have been used, or have the potential to be used, for estimating net annual soil GHG emission/removals. We evaluated the methods in data collection and identified major gaps in background/environmental data. Based on these, we developed suggestions for future GHG data collection to increase data applicability in syntheses and inventories.
Steffen Buessecker, Kaitlyn Tylor, Joshua Nye, Keith E. Holbert, Jose D. Urquiza Muñoz, Jennifer B. Glass, Hilairy E. Hartnett, and Hinsby Cadillo-Quiroz
Biogeosciences, 16, 4601–4612, https://doi.org/10.5194/bg-16-4601-2019, https://doi.org/10.5194/bg-16-4601-2019, 2019
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We investigated the potential for chemical reduction of nitrite into nitrous oxide (N2O) in soils from tropical peat. Among treatments, irradiation resulted in the lowest biological interference and least change of native soil chemistry (iron and organic matter). Nitrite depletion was as high in live or irradiated soils, and N2O production was significant in all tests. Thus, nonbiological production of N2O may be widely underestimated in wetlands and tropical peatlands.
Ward Swinnen, Nils Broothaerts, and Gert Verstraeten
Biogeosciences, 16, 3977–3996, https://doi.org/10.5194/bg-16-3977-2019, https://doi.org/10.5194/bg-16-3977-2019, 2019
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In this study, a new model is presented, which was specifically designed to study the development and carbon storage of blanket peatlands since the last ice age. In the past, two main processes (declining forest cover and rising temperatures) have been proposed as drivers of blanket peatland development on the British Isles. The simulations performed in this study support the temperature hypothesis for the blanket peatlands in the Cairngorms Mountains of central Scotland.
David Holl, Verónica Pancotto, Adrian Heger, Sergio Jose Camargo, and Lars Kutzbach
Biogeosciences, 16, 3397–3423, https://doi.org/10.5194/bg-16-3397-2019, https://doi.org/10.5194/bg-16-3397-2019, 2019
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We present 2 years of eddy covariance carbon dioxide flux data from two Southern Hemisphere peatlands on Tierra del Fuego. One of the investigated sites is a type of bog exclusive to the Southern Hemisphere, which is dominated by vascular, cushion-forming plants and is particularly understudied. One result of this study is that these cushion bogs apparently are highly productive in comparison to Northern and Southern Hemisphere moss-dominated bogs.
Liudmila S. Shirokova, Artem V. Chupakov, Svetlana A. Zabelina, Natalia V. Neverova, Dahedrey Payandi-Rolland, Carole Causserand, Jan Karlsson, and Oleg S. Pokrovsky
Biogeosciences, 16, 2511–2526, https://doi.org/10.5194/bg-16-2511-2019, https://doi.org/10.5194/bg-16-2511-2019, 2019
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Regardless of the size and landscape context of surface water in frozen peatland in NE Europe, the bio- and photo-degradability of dissolved organic matter (DOM) over a 1-month incubation across a range of temperatures was below 10 %. We challenge the paradigm of dominance of photolysis and biodegradation in DOM processing in surface waters from frozen peatland, and we hypothesize peat pore-water DOM degradation and respiration of sediments to be the main drivers of CO2 emission in this region.
Elisa Männistö, Aino Korrensalo, Pavel Alekseychik, Ivan Mammarella, Olli Peltola, Timo Vesala, and Eeva-Stiina Tuittila
Biogeosciences, 16, 2409–2421, https://doi.org/10.5194/bg-16-2409-2019, https://doi.org/10.5194/bg-16-2409-2019, 2019
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We studied methane emitted as episodic bubble release (ebullition) from water and bare peat surfaces of a boreal bog over three years. There was more ebullition from water than from bare peat surfaces, and it was controlled by peat temperature, water level, atmospheric pressure and the weekly temperature sum. However, the contribution of methane bubbles to the total ecosystem methane emission was small. This new information can be used to improve process models of peatland methane dynamics.
Franziska Koebsch, Matthias Winkel, Susanne Liebner, Bo Liu, Julia Westphal, Iris Schmiedinger, Alejandro Spitzy, Matthias Gehre, Gerald Jurasinski, Stefan Köhler, Viktoria Unger, Marian Koch, Torsten Sachs, and Michael E. Böttcher
Biogeosciences, 16, 1937–1953, https://doi.org/10.5194/bg-16-1937-2019, https://doi.org/10.5194/bg-16-1937-2019, 2019
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In natural coastal wetlands, high supplies of marine sulfate suppress methane production. We found these natural methane suppression mechanisms to be suspended by humane interference in a brackish wetland. Here, diking and freshwater rewetting had caused an efficient depletion of the sulfate reservoir and opened up favorable conditions for an intensive methane production. Our results demonstrate how human disturbance can turn coastal wetlands into distinct sources of the greenhouse gas methane.
Luke C. Jeffrey, Damien T. Maher, Scott G. Johnston, Kylie Maguire, Andrew D. L. Steven, and Douglas R. Tait
Biogeosciences, 16, 1799–1815, https://doi.org/10.5194/bg-16-1799-2019, https://doi.org/10.5194/bg-16-1799-2019, 2019
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Wetlands represent the largest natural source of methane (CH4), so understanding CH4 drivers is important for management and climate models. We compared several CH4 pathways of a remediated subtropical Australian wetland. We found permanently inundated sites emitted more CH4 than seasonally inundated sites and that the soil properties of each site corresponded to CH4 emissions. This suggests that selective wetland remediation of favourable soil types may help to mitigate unwanted CH4 emissions.
Ryo Shingubara, Atsuko Sugimoto, Jun Murase, Go Iwahana, Shunsuke Tei, Maochang Liang, Shinya Takano, Tomoki Morozumi, and Trofim C. Maximov
Biogeosciences, 16, 755–768, https://doi.org/10.5194/bg-16-755-2019, https://doi.org/10.5194/bg-16-755-2019, 2019
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(1) Wetting event with extreme precipitation increased methane emission from wetland, especially two summers later, despite the decline in water level after the wetting. (2) Isotopic compositions of methane in soil pore water suggested enhancement of production and less significance of oxidation in the following two summers after the wetting event. (3) Duration of water saturation in the active layer may be important for predicting methane emission after a wetting event in permafrost ecosystems.
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.
Sarah Cook, Mick J. Whelan, Chris D. Evans, Vincent Gauci, Mike Peacock, Mark H. Garnett, Lip Khoon Kho, Yit Arn Teh, and Susan E. Page
Biogeosciences, 15, 7435–7450, https://doi.org/10.5194/bg-15-7435-2018, https://doi.org/10.5194/bg-15-7435-2018, 2018
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This paper presents the first comprehensive assessment of fluvial organic carbon loss from oil palm plantations on tropical peat: a carbon loss pathway previously unaccounted for from carbon budgets. Carbon in the water draining four plantations in Sarawak was monitored across a 1-year period. Greater fluvial carbon losses were linked to sites with lower water tables. These data will be used to complete the carbon budget from these ecosystems and assess the full impact of this land conversion.
Ariane Arias-Ortiz, Pere Masqué, Jordi Garcia-Orellana, Oscar Serrano, Inés Mazarrasa, Núria Marbà, Catherine E. Lovelock, Paul S. Lavery, and Carlos M. Duarte
Biogeosciences, 15, 6791–6818, https://doi.org/10.5194/bg-15-6791-2018, https://doi.org/10.5194/bg-15-6791-2018, 2018
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Efforts to include tidal marsh, mangrove and seagrass ecosystems in existing carbon mitigation strategies are limited by a lack of estimates of carbon accumulation rates (CARs). We discuss the use of 210Pb dating to determine CARs in these habitats, which are often composed of heterogeneous sediments and affected by sedimentary processes. Results show that obtaining reliable geochronologies in these systems is ambitious, but estimates of mean 100-year CARs are mostly secure within 20 % error.
Danielle D. Radu and Tim P. Duval
Biogeosciences, 15, 3937–3951, https://doi.org/10.5194/bg-15-3937-2018, https://doi.org/10.5194/bg-15-3937-2018, 2018
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Climate change can shift rainfall into fewer, more intense events with longer dry periods, leading to changes in peatland hydrology and carbon cycling. We manipulated rain events over three peatland plant types (moss, sedge, and shrub). We found increasing regime intensity led to drier surface soils and deeper water tables, reducing plant carbon uptake. Mosses became sources of CO2 after >3 consecutive dry days. This study shows peatlands may become smaller sinks for carbon due to rain changes.
Peter Mueller, Lisa M. Schile-Beers, Thomas J. Mozdzer, Gail L. Chmura, Thomas Dinter, Yakov Kuzyakov, Alma V. de Groot, Peter Esselink, Christian Smit, Andrea D'Alpaos, Carles Ibáñez, Magdalena Lazarus, Urs Neumeier, Beverly J. Johnson, Andrew H. Baldwin, Stephanie A. Yarwood, Diana I. Montemayor, Zaichao Yang, Jihua Wu, Kai Jensen, and Stefanie Nolte
Biogeosciences, 15, 3189–3202, https://doi.org/10.5194/bg-15-3189-2018, https://doi.org/10.5194/bg-15-3189-2018, 2018
Karel Castro-Morales, Thomas Kleinen, Sonja Kaiser, Sönke Zaehle, Fanny Kittler, Min Jung Kwon, Christian Beer, and Mathias Göckede
Biogeosciences, 15, 2691–2722, https://doi.org/10.5194/bg-15-2691-2018, https://doi.org/10.5194/bg-15-2691-2018, 2018
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We present year-round methane emissions from wetlands in Northeast Siberia that were simulated with a land surface model. Ground-based flux measurements from the same area were used for evaluation of the model results, finding a best agreement with the observations in the summertime emissions that take place in this region predominantly through plants. During winter, methane emissions through the snow contribute 4 % of the total annual methane budget, but these are still underestimated.
Aino Korrensalo, Elisa Männistö, Pavel Alekseychik, Ivan Mammarella, Janne Rinne, Timo Vesala, and Eeva-Stiina Tuittila
Biogeosciences, 15, 1749–1761, https://doi.org/10.5194/bg-15-1749-2018, https://doi.org/10.5194/bg-15-1749-2018, 2018
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We measured methane fluxes of a boreal bog from six different plant community types in 2012–2014. We found only little variation in methane fluxes among plant community types. Peat temperature as well as both leaf area of plant species with air channels and of all vegetation are important factors controlling the fluxes. We also detected negative net fluxes indicating methane consumption each year. Our results can be used to improve the models of peatland methane dynamics under climate change.
Magnus Gålfalk, Martin Karlson, Patrick Crill, Philippe Bousquet, and David Bastviken
Biogeosciences, 15, 1549–1557, https://doi.org/10.5194/bg-15-1549-2018, https://doi.org/10.5194/bg-15-1549-2018, 2018
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We describe a quick in situ method for mapping ground surface cover, calculating areas of each surface type in a 10 x 10 m plot for each measurement. The method is robust, weather-independent, easily carried out, and uses wide-field imaging with a standard remote-controlled camera mounted on a very long extendible monopod from a height of 3–4.5 m. The method enables collection of detailed field reference data, critical in many remote sensing applications, such as wetland mapping.
Olli Peltola, Maarit Raivonen, Xuefei Li, and Timo Vesala
Biogeosciences, 15, 937–951, https://doi.org/10.5194/bg-15-937-2018, https://doi.org/10.5194/bg-15-937-2018, 2018
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Emission via bubbling, i.e. ebullition, is one of the main CH4 emission pathways from wetlands to the atmosphere, yet it is still coarsely represented in wetland CH4 models. In this study three ebullition modelling approaches are evaluated. Modeled annual CH4 emissions were similar, whereas temporal variability in CH4 emissions varied an order of magnitude between the approaches. Hence realistic description of ebullition is needed when models are compared to and calibrated against measurements.
Tracy Elsey-Quirk and Viktoria Unger
Biogeosciences, 15, 379–397, https://doi.org/10.5194/bg-15-379-2018, https://doi.org/10.5194/bg-15-379-2018, 2018
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Salt marshes have high rates of plant productivity and carbon accumulation. For this study, we found that differences in environmental conditions between estuary types were important in determining the source and stability of soil organic carbon. Specifically, sediment availability was extremely important in promoting high plant productivity and carbon accumulation in an estuary which was sediment-limited. In a sediment-rich estuary vegetation–soil-carbon relationships were weaker.
Jordan P. Goodrich, David I. Campbell, and Louis A. Schipper
Biogeosciences, 14, 4563–4576, https://doi.org/10.5194/bg-14-4563-2017, https://doi.org/10.5194/bg-14-4563-2017, 2017
Jonathan P. Ritson, Richard E. Brazier, Nigel J. D. Graham, Chris Freeman, Michael R. Templeton, and Joanna M. Clark
Biogeosciences, 14, 2891–2902, https://doi.org/10.5194/bg-14-2891-2017, https://doi.org/10.5194/bg-14-2891-2017, 2017
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Peatlands are a globally important store of carbon; however increased droughts in the future may affect their ability to sequester carbon. Using laboratory simulations we show that droughts, through exposure to oxygen, greatly increase the quantity and alter the quality of dissolved organic carbon (DOC) released from peat. Catchment management which keeps water tables high to limit oxygen exposure is therefore likely to deliver positive water quality outcomes.
Sung-Ching Lee, Andreas Christen, Andrew T. Black, Mark S. Johnson, Rachhpal S. Jassal, Rick Ketler, Zoran Nesic, and Markus Merkens
Biogeosciences, 14, 2799–2814, https://doi.org/10.5194/bg-14-2799-2017, https://doi.org/10.5194/bg-14-2799-2017, 2017
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Burns Bog in Vancouver is the largest peatland on North America's west coast. It is undergoing rewetting as a restoration management after peat harvesting. Rewetting of disturbed areas facilitates their ecological recovery but has an immediate impact on carbon dioxide and methane exchange. On the floating flux tower, we quantified annual carbon dioxide and methane exchange to inform future management. Our results suggested that the study area was a net carbon sink after 7-year rewetting.
Amy E. Pickard, Kate V. Heal, Andrew R. McLeod, and Kerry J. Dinsmore
Biogeosciences, 14, 1793–1809, https://doi.org/10.5194/bg-14-1793-2017, https://doi.org/10.5194/bg-14-1793-2017, 2017
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Peatland catchments export significant volumes of photoreactive carbon to aquatic systems, particularly headwater streams. Delivery of photoreactive material is subject to seasonal variation, and is also influenced by the timing and magnitude of rainfall events. We suggest that photoprocessing of peatland derived carbon may contribute to carbon dioxide emissions from aquatic systems, although considerable uncertainty remains as to how much material is processed
in situwithin these systems.
Eva van den Elzen, Martine A. R. Kox, Sarah F. Harpenslager, Geert Hensgens, Christian Fritz, Mike S. M. Jetten, Katharina F. Ettwig, and Leon P. M. Lamers
Biogeosciences, 14, 1111–1122, https://doi.org/10.5194/bg-14-1111-2017, https://doi.org/10.5194/bg-14-1111-2017, 2017
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Peatlands are important because they sequester large amounts of carbon, for which nitrogen is needed. In peatlands dominated by peat mosses, atmospheric nitrogen is fixed by associated microorganisms. We here show for the first time experimentally that phosphorus availability and acid buffering, both showing large variations among peatlands, can explain the strong differences reported for nitrogen fixation. This improves our understanding of peatland functioning in relation to global change.
Paul J. Hanson, Jeffery S. Riggs, W. Robert Nettles, Jana R. Phillips, Misha B. Krassovski, Leslie A. Hook, Lianhong Gu, Andrew D. Richardson, Donald M. Aubrecht, Daniel M. Ricciuto, Jeffrey M. Warren, and Charlotte Barbier
Biogeosciences, 14, 861–883, https://doi.org/10.5194/bg-14-861-2017, https://doi.org/10.5194/bg-14-861-2017, 2017
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This paper describes operational methods to achieve whole-ecosystem warming (WEW) for tall-stature, high-carbon, boreal forest peatlands. The methods enable scientists to study immediate and longer-term (1 decade) responses of organisms (microbes to trees) and ecosystem functions (carbon, water and nutrient cycles). The WEW technology allows researchers to have a plausible glimpse of future environmental conditions for study that are not available in the current observational record.
Marijn Van de Broek, Stijn Temmerman, Roel Merckx, and Gerard Govers
Biogeosciences, 13, 6611–6624, https://doi.org/10.5194/bg-13-6611-2016, https://doi.org/10.5194/bg-13-6611-2016, 2016
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The results of this study on the organic carbon (OC) stocks of tidal marshes show that variations in OC stocks along estuaries are important and should be taken into account to make accurate estimates of the total amount of OC stored in these ecosystems. Moreover, our results clearly show that most studies underestimate the variation in OC stocks along estuaries due to a shallow sampling depth, neglecting the variation in OC decomposition after burial along estuaries.
Rémon Saaltink, Stefan C. Dekker, Jasper Griffioen, and Martin J. Wassen
Biogeosciences, 13, 4945–4957, https://doi.org/10.5194/bg-13-4945-2016, https://doi.org/10.5194/bg-13-4945-2016, 2016
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We identified biogeochemical plant–soil feedback processes that occur when oxidation, drying and modification by plants alter sediment conditions. Wetland construction in Markermeer (a lake in the Netherlands) is used as a case study. Natural processes will be utilized during and after construction to accelerate ecosystem development. We conducted a 6-month greenhouse experiment to identify the key biogeochemical processes in the mud when Phragmites australis is used as an eco-engineer.
Irina Evgenievna Terentieva, Mikhail Vladimirovich Glagolev, Elena Dmitrievna Lapshina, Alexandr Faritovich Sabrekov, and Shamil Maksyutov
Biogeosciences, 13, 4615–4626, https://doi.org/10.5194/bg-13-4615-2016, https://doi.org/10.5194/bg-13-4615-2016, 2016
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West Siberia (WS) wetlands are the world’s largest high-latitude wetland system. WS methane emission estimates suffered from large uncertainty due to high emission rate variability across the wetland vegetation cover. We mapped WS taiga zone wetlands with Landsat imagery and applied wetland typology specifically developed to reflect heterogeneity of methane fluxes. The map provides a benchmark for validation of coarse-resolution land cover products and wetland data sets in high latitudes.
Merten Minke, Jürgen Augustin, Andrei Burlo, Tatsiana Yarmashuk, Hanna Chuvashova, Annett Thiele, Annette Freibauer, Vitalij Tikhonov, and Mathias Hoffmann
Biogeosciences, 13, 3945–3970, https://doi.org/10.5194/bg-13-3945-2016, https://doi.org/10.5194/bg-13-3945-2016, 2016
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We studied GHG emissions along water-level gradients of two inundated cutover fens with closed chambers. N2O fluxes were negligible. CO2 and CH4 fluxes were controlled by vegetation composition and plant productivity, which in turn depended on water level and nutrient conditions. CH4 fluxes from mesotrophic sites were low and largely compensated for by CO2 uptake. Eutrophic sites were strong CH4 sources, and GHG balances depended on the plant's net C sink, which strongly differed between species.
Daniela Franz, Franziska Koebsch, Eric Larmanou, Jürgen Augustin, and Torsten Sachs
Biogeosciences, 13, 3051–3070, https://doi.org/10.5194/bg-13-3051-2016, https://doi.org/10.5194/bg-13-3051-2016, 2016
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Based on the eddy covariance method we investigate the ecosystem–atmosphere exchange of CH4 and CO2 at a eutrophic shallow lake as a challenging ecosystem often evolving during peatland rewetting. Both open water and emergent vegetation are net emitters of CH4 and CO2, but with strikingly different release rates. Even after 9 years of rewetting the lake ecosystem exhibits a considerable carbon loss and global warming impact, the latter mainly driven by high CH4 emissions from the open waterbody.
Lei Zhao, Christopher W. N Anderson, Guangle Qiu, Bo Meng, Dingyong Wang, and Xinbin Feng
Biogeosciences, 13, 2429–2440, https://doi.org/10.5194/bg-13-2429-2016, https://doi.org/10.5194/bg-13-2429-2016, 2016
K. Zając and C. Blodau
Biogeosciences, 13, 707–722, https://doi.org/10.5194/bg-13-707-2016, https://doi.org/10.5194/bg-13-707-2016, 2016
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Peatlands have been exposed to nitrogen (N) deposition in Europe for decades. In this greenhouse study we investigated how N concentration and mobility in plants and peat have responded by sampling five sites across Europe and experimentally depositing labeled nitrogen on samples in a greenhouse. The peat moss retained its ability to absorb labeled nitrogen, but in the polluted sites more of it reached the deeper peat and was taken up by shrubs and grasses, indicating increased mobility of N.
R. L. Sobrinho, M. C. Bernardes, G. Abril, J.-H. Kim, C. I Zell, J.-M. Mortillaro, T. Meziane, P. Moreira-Turcq, and J. S. Sinninghe Damsté
Biogeosciences, 13, 467–482, https://doi.org/10.5194/bg-13-467-2016, https://doi.org/10.5194/bg-13-467-2016, 2016
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The principal objective of the present work is to quantify the fractions of the principal sources of sedimentary organic matter (SOM) in floodplain lakes of the central Amazon basin. The results indicate that the main source of SOM is not the riverine particulate material, as postulated by the literature, but the macrophytes and the forests.
A. L. Zuijdgeest, R. Zurbrügg, N. Blank, R. Fulcri, D. B. Senn, and B. Wehrli
Biogeosciences, 12, 7535–7547, https://doi.org/10.5194/bg-12-7535-2015, https://doi.org/10.5194/bg-12-7535-2015, 2015
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Two large floodplains hold the peak flows in the Zambezi River system – the dam-impacted Kafue Flats and the largely pristine Barotse Plains. Here we show that the inputs of organic matter and nutrients from such floodplains to the river are strongly affected by the presence of hydropower dams and highlight how floodplains act as large biogeochemical reactors that can behave distinctly differently from the entire catchment.
X. Chen, T. J. Bohn, and D. P. Lettenmaier
Biogeosciences, 12, 6259–6277, https://doi.org/10.5194/bg-12-6259-2015, https://doi.org/10.5194/bg-12-6259-2015, 2015
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We used a process-based model to investigate the sensitivities of pan-Arctic wetland methane emissions to climate factors, as a function of climate. Over the period 1960-2006, temperature was the dominant driver of trends in emissions. Wetlands north of 60N were temperature-limited, and wetlands south of 60N latitude were water-limited. Projected future warming will cause water-limited wetlands to expand northward over the next century, lessening the role of temperature in the future.
R. H. Bulmer, C. J. Lundquist, and L. Schwendenmann
Biogeosciences, 12, 6169–6180, https://doi.org/10.5194/bg-12-6169-2015, https://doi.org/10.5194/bg-12-6169-2015, 2015
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This is the first study investigating the effect of clearing on sediment CO2 efflux in temperate Avicennia marina forests. We found that rates of sediment CO2 efflux from cleared and intact temperate Avicennia marina forests are comparable to rates observed in other temperate and tropical forests. Our results show that greater consideration should be made regarding the rate of carbon released from mangrove forest following clearance and the relative contribution to global carbon emissions.
F. Cresto Aleina, B. R. K. Runkle, T. Kleinen, L. Kutzbach, J. Schneider, and V. Brovkin
Biogeosciences, 12, 5689–5704, https://doi.org/10.5194/bg-12-5689-2015, https://doi.org/10.5194/bg-12-5689-2015, 2015
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We developed a process-based model for peatland micro-topography and hydrology, the Hummock-Hollow (HH) model, which explicitly represents small-scale surface elevation changes. By coupling the HH model with a model for soil methane processes, we are able to model the effects of micro-topography on hydrology and methane emissions in a typical boreal peatland. We also identify potential biases that models without a micro-topographic representation can introduce in large-scale models.
A. Berchet, I. Pison, F. Chevallier, J.-D. Paris, P. Bousquet, J.-L. Bonne, M. Y. Arshinov, B. D. Belan, C. Cressot, D. K. Davydov, E. J. Dlugokencky, A. V. Fofonov, A. Galanin, J. Lavrič, T. Machida, R. Parker, M. Sasakawa, R. Spahni, B. D. Stocker, and J. Winderlich
Biogeosciences, 12, 5393–5414, https://doi.org/10.5194/bg-12-5393-2015, https://doi.org/10.5194/bg-12-5393-2015, 2015
T. Broder and H. Biester
Biogeosciences, 12, 4651–4664, https://doi.org/10.5194/bg-12-4651-2015, https://doi.org/10.5194/bg-12-4651-2015, 2015
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This study combines a 1-year monitoring of precipitation, ombrotrophic peatland water level and pore water concentration changes with bog discharge and DOC, iron, As and Pb stream concentrations. Exports of As and Pb are dependent on not only the amount of precipitation and discharge but also the frequency and depth of water table fluctuations by connection of additional DOC, As and Pb pools in the acrotelm during water table rise, which is most pronounced after drought.
M. F. Adame, N. S. Santini, C. Tovilla, A. Vázquez-Lule, L. Castro, and M. Guevara
Biogeosciences, 12, 3805–3818, https://doi.org/10.5194/bg-12-3805-2015, https://doi.org/10.5194/bg-12-3805-2015, 2015
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Riverine wetlands of the south Pacific coast of Mexico had large ecosystem C stocks (784.5 MgC ha-1 for mangroves, 722.2 MgC ha-1 for peat swamps, and 336.5 MgC ha-1 for marshes). Long-term soil C sequestration values in mangroves were 1.3 ± 0.2 MgC ha-1yr-1. C stocks, and soil nitrogen stocks were in general larger for mangroves in the upper than in the lower estuary.
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Short summary
Aquatic macrophytes can be used for wastewater polishing but not for purification. At a low nutrient loading M. spicatum and A. filiculoides performed equally well for P removal, whereas at loads ≥ 22 mg P m−2 d−1, A. filiculoides removes P more efficiently. We provide an easily applicable method to select efficient macrophytes species for wastewater polishing, which is essential for decision support in water management using constructed wetlands for nutrient removal by plant harvesting.
Aquatic macrophytes can be used for wastewater polishing but not for purification. At a low...
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