Articles | Volume 16, issue 6
https://doi.org/10.5194/bg-16-1097-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-16-1097-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
19 Mar 2019
Research article |
| 19 Mar 2019
| 19 Mar 2019
Effect of plateau pika disturbance and patchiness on ecosystem carbon emissions in alpine meadow in the northeastern part of Qinghai–Tibetan Plateau
Yu Qin
State Key Laboratory of Cryospheric Sciences, Northwest Institute of
Eco-Environment and Resources, Chinese Academy of Sciences, 320 Donggang
West Road, Lanzhou, 730000, China
School of Geographic Sciences, Nantong University, 999 Tongjing Road,
Nantong, Jiangsu, 226007, China
State Key Laboratory of Cryospheric Sciences, Northwest Institute of
Eco-Environment and Resources, Chinese Academy of Sciences, 320 Donggang
West Road, Lanzhou, 730000, China
Yongjian Ding
State Key Laboratory of Cryospheric Sciences, Northwest Institute of
Eco-Environment and Resources, Chinese Academy of Sciences, 320 Donggang
West Road, Lanzhou, 730000, China
University of the Chinese Academy of Sciences, no. 19A Yuquan Road,
Beijing, 100049, China
Wei Zhang
State Key Laboratory of Cryospheric Sciences, Northwest Institute of
Eco-Environment and Resources, Chinese Academy of Sciences, 320 Donggang
West Road, Lanzhou, 730000, China
University of the Chinese Academy of Sciences, no. 19A Yuquan Road,
Beijing, 100049, China
Yan Qin
State Key Laboratory of Cryospheric Sciences, Northwest Institute of
Eco-Environment and Resources, Chinese Academy of Sciences, 320 Donggang
West Road, Lanzhou, 730000, China
University of the Chinese Academy of Sciences, no. 19A Yuquan Road,
Beijing, 100049, China
Jianjun Chen
College of Geomatics and Geoinformation, Guilin University of Technology, 12 Jiangan Road, Guilin, 541004, China
Guangxi Key Laboratory of Spatial Information and Geomatics, 12 Jiangan Road, Guilin, 541004, China
Zhiwei Wang
State Key Laboratory of Cryospheric Sciences, Northwest Institute of
Eco-Environment and Resources, Chinese Academy of Sciences, 320 Donggang
West Road, Lanzhou, 730000, China
Guizhou Institute of Prataculture, Guizhou Academy of Agricultural
Sciences, Guiyang, 550006, China
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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
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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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Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-176, https://doi.org/10.5194/bg-2023-176, 2023
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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.
Sarah M. Ludwig, Luke Schiferl, Jacqueline Hung, Susan M. Natali, and Roisin Commane
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-119, https://doi.org/10.5194/bg-2023-119, 2023
Revised manuscript accepted for BG
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Landscapes are often assumed to be homogeneous when using eddy covariance fluxes, which can lead to biases when calculating carbon budgets. In this study we report eddy covariance carbon fluxes from heterogeneous tundra. We used the footprints of each flux observation to un-mix the fluxes coming from components of the landscape. We identified and quantified hot spots of carbon emissions in the landscape. Accurately scaling with landscape heterogeneity yielded half as much regional carbon uptake.
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.
Francois Clayer, Jan-Erik Thrane, Kuria Ndungu, Andrew Luke King, Peter Dörsch, and Thomas Rohrlack
EGUsphere, https://doi.org/10.5194/egusphere-2023-1745, https://doi.org/10.5194/egusphere-2023-1745, 2023
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Determination of dissolved greenhouse gas (GHG) in freshwaters allows to estimate GHG fluxes. Mercuric chloride (HgCl2) is used to preserve water samples prior to GHG analysis despite its environmental and health impacts, and interferences with water chemistry in freshwaters. Here, we tested the effect of HgCl2 and two substitutes, and storage time on GHG in water from two boreal lakes. Preservation with HgCl2 caused overestimation of CO2 concentration with consequences on GHG fluxes estimation.
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.
Guilherme L. Torres Mendonça, Christian H. Reick, and Julia Pongratz
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-101, https://doi.org/10.5194/bg-2023-101, 2023
Revised manuscript accepted for BG
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We study the time-scale dependence of airborne fraction and underlying feedbacks by a theory of the climate-carbon system. Using simulations we show the predictive power of this theory and find that 1) this fraction generally decreases for increasing time scales, and 2) at all time scales the total feedback is negative and the model spread in a single feedback causes the spread in the airborne fraction. Our study indicates that those are properties of the system, independently of the scenario.
Zoé Rehder, Thomas Kleinen, Lars Kutzbach, Victor Stepanenko, Moritz Langer, and Victor Brovkin
Biogeosciences, 20, 2837–2855, https://doi.org/10.5194/bg-20-2837-2023, https://doi.org/10.5194/bg-20-2837-2023, 2023
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We use a new model to investigate how methane emissions from Arctic ponds change with warming. We find that emissions increase substantially. Under annual temperatures 5 °C above present temperatures, pond methane emissions are more than 3 times higher than now. Most of this increase is caused by an increase in plant productivity as plants provide the substrate microbes used to produce methane. We conclude that vegetation changes need to be included in predictions of pond methane emissions.
Julian Koch, Lars Elsgaard, Mogens H. Greve, Steen Gyldenkærne, Cecilie Hermansen, Gregor Levin, Shubiao Wu, and Simon Stisen
Biogeosciences, 20, 2387–2403, https://doi.org/10.5194/bg-20-2387-2023, https://doi.org/10.5194/bg-20-2387-2023, 2023
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Utilizing peatlands for agriculture leads to large emissions of greenhouse gases worldwide. The emissions are triggered by lowering the water table, which is a necessary step in order to make peatlands arable. Many countries aim at reducing their emissions by restoring peatlands, which can be achieved by stopping agricultural activities and thereby raising the water table. We estimate a total emission of 2.6 Mt CO2-eq for organic-rich peatlands in Denmark and a potential reduction of 77 %.
Mélissa Laurent, Matthias Fuchs, Tanja Herbst, Alexandra Runge, Susanne Liebner, and Claire C. Treat
Biogeosciences, 20, 2049–2064, https://doi.org/10.5194/bg-20-2049-2023, https://doi.org/10.5194/bg-20-2049-2023, 2023
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In this study we investigated the effect of different parameters (temperature, landscape position) on the production of greenhouse gases during a 1-year permafrost thaw experiment. For very similar carbon and nitrogen contents, our results show a strong heterogeneity in CH4 production, as well as in microbial abundance. According to our study, these differences are mainly due to the landscape position and the hydrological conditions established as a result of the topography.
Michael Moubarak, Seeta Sistla, Stefano Potter, Susan M. Natali, and Brendan M. Rogers
Biogeosciences, 20, 1537–1557, https://doi.org/10.5194/bg-20-1537-2023, https://doi.org/10.5194/bg-20-1537-2023, 2023
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Tundra wildfires are increasing in frequency and severity with climate change. We show using a combination of field measurements and computational modeling that tundra wildfires result in a positive feedback to climate change by emitting significant amounts of long-lived greenhouse gasses. With these effects, attention to tundra fires is necessary for mitigating climate change.
Hanna I. Campen, Damian L. Arévalo-Martínez, and Hermann W. Bange
Biogeosciences, 20, 1371–1379, https://doi.org/10.5194/bg-20-1371-2023, https://doi.org/10.5194/bg-20-1371-2023, 2023
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Carbon monoxide (CO) is a climate-relevant trace gas emitted from the ocean. However, oceanic CO cycling is understudied. Results from incubation experiments conducted in the Fram Strait (Arctic Ocean) indicated that (i) pH did not affect CO cycling and (ii) enhanced CO production and consumption were positively correlated with coloured dissolved organic matter and nitrate concentrations. This suggests microbial CO uptake to be the driving factor for CO cycling in the Arctic Ocean.
Yihong Zhu, Ruihua Liu, Huai Zhang, Shaoda Liu, Zhengfeng Zhang, Fei-Hai Yu, and Timothy G. Gregoire
Biogeosciences, 20, 1357–1370, https://doi.org/10.5194/bg-20-1357-2023, https://doi.org/10.5194/bg-20-1357-2023, 2023
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With global warming, the risk of flooding is rising, but the response of the carbon cycle of aquatic and associated riparian systems
to flooding is still unclear. Based on the data collected in the Lijiang, we found that flooding would lead to significant carbon emissions of fluvial areas and riparian areas during flooding, but carbon capture may happen after flooding. In the riparian areas, the surviving vegetation, especially clonal plants, played a vital role in this transformation.
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.
Cited articles
Ahlström, A., Xia, J., Arneth, A., Luo, Y., and Smith, B.: Importance of
vegetation dynamics for future terrestrial carbon cycling, Environ. Res.
Lett., 10, 1–11, 2015.
Baldi, G., Guerschman, J. P., and Paruelo, J. M.: Characterizing
fragmentation in temperate South America grasslands, Agr. Ecosyst. Environ.,
116, 197–208, 2006.
Beringer, J., Chapin, F. S., Thompson, C. C., and McGuire, A. D.: Surface
energyexchanges along a tundra-forest transition and feedbacks to climate,
Agr. Forest Meteorol., 131, 143–161, 2005.
Bestelmeyer, B. T., Ward, J. P., Herrick, J. E., and Tugel, A. J.:
Fragmentation effects on soil aggregate stability in a patchy arid grassland,
Rangeland Ecol. Manag., 59, 406–415, 2006.
Bond-Lamberty, B. and Thomson, A.: Temperature-associated increases in the
global soil respiration record, Nature, 464, 579–582, 2010.
Canadell, J. G., Kirschbaum, M. U. F., Kurz, W. A., Sanz, M. J.,
Schlamadinger, B., and Yamagata, Y.: Factoring out natural and indirect human
effects on terrestrial carbon sources and sinks, Environ. Sci. Policy, 10,
370–384, 2007.
Cao, G., Long, R., Zhang, F., Lin, L., Li, Y., and Liang, D.: Mechanism of
denuded pits developing in degraded alpine Kobresia humilis meadow in the
Three Rivers Source Region, Grassland Turf, 30, 16–21, 2010 (in Chinese with
English abstract).
Cao, G. M., Tang, Y. H., Mo, W. H., Wang, Y. S., Li, Y. N., and Zhao, X. Q.:
Grazing intensity alters soil respiration in an alpine meadow on the Tibetan
plateau, Soil Biol. Biochem., 36, 237–243, 2004.
Chang, Y., Ding, Y., Zhao, Q., and Zhang, S.: Remote estimation of
terrestrial evapotranspiration by Landsat 5 TM and the SEBAL model in cold
and high-altitude regions: A case study of the upper reach of the Shule River
Basin, China, Hydrol. Process., 31, 514–524, 2016.
Chen, J., Yi, S., and Qin, Y.: The contribution of plateau pika disturbance
and erosion on patchy alpine grassland soil on the Qinghai-Tibetan Plateau:
Implications for grassland restoration, Geoderma, 297, 1–9, 2017.
Chen, S., Liu, W., Qin, X., Liu, Y., Zhang, T., Chen, K., Hu, F., Ren, J.,
and Qin, D.: Response characteristics of vegetation and soil environment to
permafrost degradation in the upstream regions of the Shule River Basin,
Environ. Res. Lett., 7, 045406, https://doi.org/10.1088/1748-9326/7/4/045406, 2012.
Cheng, G. and Wu, T.: Responses of permafrost to climate change and their
environmental significance, Qinghai-tibet plateau, J. Geophys. Res., 112,
1–10, 2007.
Chimner, R. A. and Welker, J. M.: Ecosystem Respiration Responses to
Experimental Manipulations of Winter and Summer Precipitation in a Mixedgrass
Prairie, WY, USA, Biogeochemistry, 73, 257–270, 2005.
Clark, J. E., Hellgren, E. C., Parsons, J. L., Jorgensen, E. E., Engle, D.
M., and Leslie, D. M.: Nitrogen outputs from fecal and urine deposition of
small mammals: implications for nitrogen cycling, Oecologia, 144, 447–455,
2005.
Conant, R. T., Steinweg, J. M., Haddix, M. L., Paul, E. A., Plante, A. F.,
and Six, J.: Experimental warming shows that decomposition temperature
sensitivity increases with soil organic matter recalcitrance, Ecology, 89,
2384–2391, 2008.
Cox, P. M., Betts, R. A., Jones, C. D., Spall, S. A., and Totterdell, I. J.:
Acceleration of global warming due to carbon-cycle feedbacks in a coupled
climate model, Nature, 408, 184–187, 2000.
Davidson, A. D. and Lightfoot, D. C.: Burrowing rodents increase landscape
heterogeneity in a desert grassland, J. Arid. Environ., 72, 1133–1145, 2008.
Defries, R. S., Field, C. B., Fung, I., Collatz, G. J., and Bounoua, L.:
Combining satellite data and biogeochemical models to estimate global effects
of human-induced land cover change on carbon emissions and primary
productivity, Global. Biogeochem. Cy., 13, 803–815, 1999.
Dong, Q. M., Zhao, X. Q., Wu, G. L., Shi, J. J., and Ren, G. H.: A review of
formation mechanism and restoration measures of “black-soil-type” degraded
grassland in the qinghai-tibetan plateau, Environ. Earth. Sci., 70,
2359–2370, 2013.
Dong, S. K., Wang, X. X., Liu, S. L., Li, Y. Y., Su, X. K., Wen, L., and Zhu,
L.: Reproductive responses of alpine plants to grassland degradation and
artificial restoration in the Qinghai-Tibetan Plateau, Grass. Forage Sci.,
70, 229–238, 2014.
Dong, Z. B., Hu, G. Y., Yan, C. Z., Wang, W. L., and Lu, J. F.: Aeolian
desertification and its causes in the Zoige Plateau of China's
Qinghai-Tibetan Plateau, Environ. Earth Sci., 59, 1731–1740, 2010.
Dregne, H. E.: Land degradation in the drylands, Arid Soil Res. Rehab., 16,
99–132, 2002.
Fécan, F., Marticorena, B., and Bergametti, G.: Parametrization of the
increase of the aeolian erosion threshold wind friction velocity due to soil
moisture for arid and semi-arid areas, Ann. Geophys., 17, 149–157,
https://doi.org/10.1007/s00585-999-0149-7, 1999.
Flanagan, L. B. and Johnson, B. G.: Interacting effects of temperature, soil
moisture and plant biomass production on ecosystem respiration in a northern
temperate grassland, Agr. Forest Meteorol., 130, 237–253, 2005.
Grogan, P. and Jonasson, S.: Temperature and substrate controls on
intra-annual variation in ecosystem respiration in two subarctic vegetation
types, Glob. Change Biol., 11, 465–475, 2005.
Guo, X. L., Yi, S. H., Qin, Y., and Chen, J. J.: Habitat environment affects
the distribution of plateau pikas: a study based on an unmanned aerial
vehicle, Pratacul. Sci., 34, 1306–1313, 2017 (in Chinese with English
abstract).
Herkert, J. R., Reinking, D. L., Wiedenfeld, D. A., Winter, M., Zimmerman, J.
L., Jensen, W. E., Finck, E. J., Koford, R. R., Wolfe, D. H., Sherrod, S. K.,
Jenkins, M. A., Faaborg, J., and Robinson, S. K.: Effects of prairie
fragmentation on the nest success of breeding birds in the mid-continental
United States, Conserv. Biol., 17, 587–594, 2003.
Hogan, B. W.: The plateau pika: A keystone engineer on the Tibetan Plateau,
Doctoral dissertation, Arizona State University, Tempe, AZ, 2010.
Högberg, P., Nordgren, A., and Ågren, G. I.: Carbon allocation
between tree root growth and root respiration in boreal pine forest,
Oecologia, 132, 579–581, 2002.
Janssens, I. A., Lankreijer, H., Matteucci, G., Kowalski, A. S., Buchmann,
N., Epron, D., Pilegaard, K., Kutsch, W., Longdoz, B., Grünwald, T.,
Montagnani, L., Dore, S., Rebmann, C., Moors, E. J., Grelle, A., Rannik,
Morgenstern, K., Oltchev, S., Clement, R., Gudmundsson, J., Minerbi, S.,
Berbigier, P., Ibrom, A., Moncrieff, J., Aubinet, M., Bernhofer, C., Jensen,
N. O., Vesala, T., Granier, A., Schulze, E. D., Lindroth, A., Dolman, A. J.,
Jarvis, P. G., Ceulemans, R., and Valentini, R.: Productivity overshadows
temperature in determining soil and ecosystem respiration across european
forests, Glob. Change Biol., 7, 269–278, 2001.
Juszczak, R., Humphreys, E., Acosta, M., Michalak-Galczewska, M., Kayzer, D.,
and Olejnik, J.: Ecosystem respiration in a heterogeneous temperate peatland
and its sensitivity to peat temperature and water table depth, Plant. Soil.,
366, 505–520, 2013.
Kouki, J. and Löfman, S.: Forest fragmentation: processes, concepts and
implications for especies, in: Key Concepts of Landscape Ecology, edited by:
Dover, J. W. and Bunce, R. G. H., IALE (UK), Preston, 187–203, 1998.
Lai, C. H. and Smith, A. T.: Keystone status of plateau pikas
(Ochotona curzoniae): effect of control on biodiversity of native
birds, Biodivers. Conserv., 12, 1901–1912, 2003.
Lal, R.: Potential of desertification control to sequester carbon and
mitigate the greenhouse effect, Climatic Change, 51, 35–72, 2001.
Le Quéré, C., Peters, G. P., Andres, R. J., Andrew, R. M., Boden, T.
A., Ciais, P., Friedlingstein, P., Houghton, R. A., Marland, G., Moriarty,
R., Sitch, S., Tans, P., Arneth, A., Arvanitis, A., Bakker, D. C. E., Bopp,
L., Canadell, J. G., Chini, L. P., Doney, S. C., Harper, A., Harris, I.,
House, J. I., Jain, A. K., Jones, S. D., Kato, E., Keeling, R. F., Klein
Goldewijk, K., Körtzinger, A., Koven, C., Lefèvre, N., Maignan, F.,
Omar, A., Ono, T., Park, G.-H., Pfeil, B., Poulter, B., Raupach, M. R.,
Regnier, P., Rödenbeck, C., Saito, S., Schwinger, J., Segschneider, J.,
Stocker, B. D., Takahashi, T., Tilbrook, B., van Heuven, S., Viovy, N.,
Wanninkhof, R., Wiltshire, A., and Zaehle, S.: Global carbon budget 2013,
Earth Syst. Sci. Data, 6, 235–263, https://doi.org/10.5194/essd-6-235-2014,
2014.
Li, W. and Zhang, Y.: Impacts of plateau pikas on soil organic matter and
moisture content in alpine meadow, Acta Theriol., 26, 331–337, 2006.
Lin, X. W., Zhang, Z. H., Wang, S. P., Hu, Y. G., Xu, G. P., Luo, C. Y.,
Chang, X. F., Duan, J. C., Lin, Q. Y., Xu, B. R. B. Y., Wang, Y. F., Zhao, X.
Q., and Xie, Z. B.: Response of ecosystem respiration to warming and grazing
during the growing seasons in the alpine meadow on the Tibetan plateau, Agr.
Forest Meteorol., 151, 792–802, 2011.
Lindenmayer, D. B. and Fischer, J.: Habitat fragmentation and landscape
change: an ecological and conservation synthesis, Island Press, Washington,
USA, 2013.
Liu, Y. S., Fan, J. W., Harris, W., Shao, Q. Q., Zhou, Y. C., Wang, N., and
Li, Y. Z.: Effects of plateau pika (Ochotona curzoniae) on net
ecosystem carbon exchange of grass-land in the Three Rivers Headwaters
region, Qinghai-Tibet, China, Plant. Soil., 366, 491–504, 2013.
Ma, Y. J., Wu, Y. N., Liu, W. L., Li, X. Y., and Lin, H. S.: Microclimate
response of soil to plateau pika's disturbance in the northeast qinghai-tibet
plateau, Eur. J. Soil Sci., 69, 232–244, 2018.
Martin, B. G.: The role of small ground-foraging mammals in topsoil health
and biodiversity: Implications to management and restoration, Ecol. Manag.
Restor., 4, 114–119, 2003.
McKey, D., Rostain, S., Iriarte, J., Glaser, B., Birk, J. J., Holst, I., and
Renard, D.: Pre-Columbian agricultural landscapes, ecosystem engineers, and
self-organized patchiness in Amazonia, P. Natl. Acad. Sci. USA, 107,
7823–7828, 2010.
Nakano, T., Nemoto, M., and Shinoda, M.: Environmental controls on
photosynthetic production and ecosystem respiration in semi-arid grasslands
of Mongolia, Agr. Forest Meteorol., 148, 1456–1466, 2008.
Nelson, D. W. and Sommers, L. E.: Total carbon, organic carbon and organic
matter, in: Methods of soil analysis, edited by: Page, A. L., Miller, R. H.,
and Keeney, D. R., 2nd Edn., American Society of Agronomy, Madison, 539–577,
1982.
Nobili, M. D., Contin, M., Mondini, C., and Brookes, P. C.: Soil microbial
biomass is triggered into activity by trace amounts of substrate, Soil Biol.
Biochem., 33, 1163–1170, 2001.
Oberbauer, S. F., Tweedie, C. E., Welker, J. M., Fahnestock, J. T., Henry, G.
H. R., Webber, P. J., Hollister, R. D., Walker, M. D., Kuchy, A., Elmore, E.,
and Starr, G.: Tundra CO2 fluxes in response to experimental
warming across latitudinal and moisture gradients, Ecol. Monogr., 77,
221–238, 2007.
Peng, F., Quangang, Y., Xue, X., Guo, J., and Wang, T.: Effects of
rodent-induced land degradation on ecosystem carbon fluxes in an alpine
meadow in the Qinghai–Tibet Plateau, China, Solid Earth, 6, 303–310,
https://doi.org/10.5194/se-6-303-2015, 2015.
Pielke, R. A.: Land use and climate change, Science, 310, 1625–1626, 2005.
Post, W. M. and Kwon, K. C.: Soil carbon sequestration and land-use change:
processes and potential, Glob. Change. Biol., 6, 317–327, 2000.
Qin, Y. and Yi, S.: Diurnal characteristics of ecosystem respirationof alpine
meadow on the Qinghai-Tibetan plateau: Implicationsfor carbon budget
estimation, Sci. World J., 2013, 9–14, 2013.
Qin, Y., Yi, S., Ren, S., Li, N., and Chen, J.: Responses of typical
grasslands in a semiarid basin on the Qinghai-Tibetan plateau to climate
change and disturbances, Environ. Earth. Sci., 71, 1421–1431, 2014.
Qin, Y., Chen, J. J., and Yi, S. H.: Plateau pikas burrowing activity
accelerates ecosystem carbon emission from alpine grassland on the
Qinghai-Tibetan Plateau, Ecol. Eng., 84, 287–291, 2015a.
Qin, Y., Yi, S. H., Chen, J. J., Ren, S. L., and Ding, Y. J.: Effects of
gravel on soil and vegetation properties of alpine grassland on the
Qinghai-Tibetan plateau, Ecol. Eng., 74, 351–355, 2015b.
Qin, Y., Yi, S., Chen, J., Ren, S., and Wang, X.: Responses of ecosystem
respiration to short-term experimental warming in the alpine meadow ecosystem
of a permafrost site on the qinghai-tibetan plateau, Cold. Reg. Sci.
Technol., 115, 77–84, 2015c.
Qin, Y., Yi, S., Ding, Y., Xu, G., Chen, J., and Wang, Z.: Effects of
small-scale patchiness of alpine grassland on ecosystem carbon and nitrogen
accumulation and estimation in northeastern qinghai-tibetan plateau,
Geoderma, 318, 52–63, 2018.
Raich, J. W. and Potter, C. S.: Global patterns of carbon-dioxide emissions
from soils, Global Biogeochem. Cy., 9, 23–36, 1995.
Reichstein, M., Tenhunen, J. D., Roupsard, O., Ourcival, J.-M., Rambal, S.,
Dore, S., and Valentini, R.: Ecosystem respiration in two Mediterranean
evergreen Holm oak forests: drought effects and decompsition dynamics, Funct.
Ecol., 16, 27–39, 2002.
Rietkerk, M., Dekker, S. C., de Ruiter, P. C., and van de Koppel, J.:
Self-organized patchiness and catastrophic shifts in ecosystems, Science,
305, 1926–1929, 2004.
Roch, L. and Jaeger, J. A.: Monitoring an ecosystem at risk: What is the
degree of grassland fragmentation in the Canadian Prairies?, Environ. Monit.
Assess., 186, 2505–2534, 2014.
Saunders, D. A., Hobbs, R. J., and Margules, C. R.: Biological consequences
of ecosystem fragmentation: a review, Conserv. Biol., 5, 18–32, 1991.
Schimel, D. S., House, J. I., Hibbard, K. A., Bousquet, P., Ciais, P.,
Peylin, P., Braswell, B. H., Apps, M. J., Baker, D., Bondeau, A., Canadell,
J., Churkina, G., Cramer, W., Denning, A. S., Field, C. B., Friedlingstein,
P., Goodale, C., Heimann, M., Houghton, R. A., Melillo, J. M., Moore III, B.,
Murdiyarso, D., Noble, I., Pacala, S. W., Prentice, I. C., Raupach, M. R.,
Rayner, P. J., Scholes, R. J., Steffen, W. L., and Wirth, C.: Recent patterns
and mechanisms of carbon exchange by terrestrial ecosystems, Nature, 414,
169–172, 2001.
Scott-Denton, L., Rosenstiel, T., and Monson, R.: Differential controls by
climate and substrate over the heterotrophic and rhizospheric components of
soil respiration, Glob. Change Biol., 12, 205–216, 2010.
Sikora, L. J. and Mccoy, J. L.: Attempts to determine available carbon in
soils, Biol. Fert. Soils, 9, 19–24, 1990.
Smith, A. T. and Foggin, J. M.: The plateau pika (Ochotona curzoniae) is a keystone species for biodiversity on the Tibetan plateau,
Anim. Conserv., 2, 235–240, 1999.
Tewary, C. K., Pandey, U., and Singh, J. S.: Soil and litter respiration
rates in different microhabitats of a mixed oak-conifer forest and their
control by edaphic conditions and substrate quality, Plant Soil, 65,
233–238, 1982.
Upadhyay, T. P., Sankhayan, P. L., and Solberg, B.: A review of carbon
sequestration dynamics in the himalayan region as a function of land-use
change and forest/soil degradation with special reference to nepal, Agr.
Ecosyst. Environ., 105, 449–465, 2005.
Venegas, J. G., Winkler, T., Musch, G., Melo, M. F. V., Layfield, D.,
Tgavalekos, N., Fischman, A. J., Callahan, R. J., Bellani, G., and Harris, R.
S.: Self-organized patchiness in asthma as a prelude to catastrophic shifts,
Nature, 434, 777–782, 2005.
von Buttlar, J., Zscheischler, J., Rammig, A., Sippel, S., Reichstein, M.,
Knohl, A., Jung, M., Menzer, O., Arain, M. A., Buchmann, N., Cescatti, A.,
Gianelle, D., Kiely, G., Law, B. E., Magliulo, V., Margolis, H., McCaughey,
H., Merbold, L., Migliavacca, M., Montagnani, L., Oechel, W., Pavelka, M.,
Peichl, M., Rambal, S., Raschi, A., Scott, R. L., Vaccari, F. P., van Gorsel,
E., Varlagin, A., Wohlfahrt, G., and Mahecha, M. D.: Impacts of droughts and
extreme-temperature events on gross primary production and ecosystem
respiration: a systematic assessment across ecosystems and climate zones,
Biogeosciences, 15, 1293–1318, https://doi.org/10.5194/bg-15-1293-2018,
2018.
Wang, B., Zha, T. S., Jia, X., Wu, B., Zhang, Y. Q., and Qin, S. G.: Soil
moisture modifies the response of soil respiration to temperature in a desert
shrub ecosystem, Biogeosciences, 11, 259–268,
https://doi.org/10.5194/bg-11-259-2014, 2014.
Wang, Z., Song, K., Zhang, B., Liu, D., Ren, C., Luo, L., Yang, T., Huang,
N., Hu, L., Yang, H., and Liu, Z.: Shrinkage and fragmentation of grasslands
in the West Songnen Plain, China, Agr. Ecosyst. Environ., 129, 315–324,
2009.
Warren, C. R. and Taranto, M. T.: Ecosystem Respiration in a Seasonally
Snow-Covered Subalpine Grassland, Arct. Antarct. Alp. Res., 43, 137–146,
2011.
Wei, X. H., Li, S., and Yang, P.: Changes of soil physical and chemical
property of Alpine Kobresia Meadow around plateau pika entrances in the
process of related to erosion, Grassl. China, 28, 24–29, 2006 (in Chinese
with English abstract).
Wilson, M. C. and Smith, A. T.: The pika and the watershed: The impact of
small mammal poisoning on the ecohydrology of the Qinghai-Tibetan Plateau,
Ambio, 44, 16–22, 2015.
Wu, J. K., Zhang, S. Q., Wu, H., Liu, S. W., Qin, Y., and Qin, J.: Actual
Evapotranspiration in Suli Alpine Meadow in Northeastern Edge of
Qinghai-Tibet Plateau, China, Adv. Meteorol., 3, 1–10, 2015.
Wuest, S. B., Williams, J. D., and Gollany, H. T.: Tillage and perennial
grass effects on ponded inltration for seven semi-arid loess soils, J. Soil
Water Conserv., 61, 218–223, 2006.
Xu, M. and Qi, Y.: Soil-surface CO2 efflux and its spatial and
temporal variations in a young ponderosa pine plantation in northern
california, Glob. Change Biol., 7, 667–677, 2010.
Yan, Y., Xin, X., Xu, X., Wang, X., Yan, R., and Murray, P. J.: Vegetation
patches increase wind-blown litter accumulation in a semi-arid steppe of
northern China, Environ. Res. Lett., 11, 124008,
https://doi.org/10.1088/1748-9326/11/12/124008, 2016.
Yang, M., Yao, T., Guo, X., Koike, T., and He, Y.: The soil moisture
distribution, thawing-freezing processes and their effects on the seasonal
transition on the Qinghai-Xizang (Tibetan) Platea, J. Asian Earth. Sci., 21,
457–465, 2003.
Yang, P., Lai, D. Y. F., Huang, J. F., Zhang, L. H., and Tong, C.: Temporal
variations and temperature sensitivity of ecosystem respiration in three
brackish marsh communities in the min river estuary, southeast
china, Geoderma, 327, 138–150, 2018.
Yi, S.: Fragmap: a tool for long-term and cooperative monitoring and analysis
of small-scale habitat fragmentation using an unmanned aerial vehicle, Int.
J. Remote Sens., 38, 2686–2697, 2017.
Yi, S., Zhou, Z., Ren, S., Xu, M., Qin, Y., Chen, S., and Ye, B.: Effects of
permafrost degradation on alpine grassland in a semi-arid basin on the
Qinghai-Tibetan Plateau, Environ. Res. Lett., 6, 045403,
https://doi.org/10.1088/1748-9326/6/4/045403, 2011.
Yi, S., Li, N., Xiang, B., Wang, X., Ye, B., and Mcguire, A. D.: Representing
the effects of alpine grassland vegetation cover on the simulation of soil
thermal dynamics by ecosystem models applied to the Qinghai-Tibetan
Plateau, J. Geophys. Res.-Biogeo., 118, 1186–1199, 2013.
Yi, S., Wang, X., Qin, Y., Xiang, B., and Ding, Y.: Responses of alpine
grassland on Qinghai-Tibetan plateau to climate warming and permafrost
degradation: a modeling perspective, Environ. Res. Lett., 9, 074014,
https://doi.org/10.1088/1748-9326/9/7/074014, 2014.
Yi, S., Chen, J., Qin, Y., and Xu, G.: The burying and grazing effects of
plateau pika on alpine grassland are small: a pilot study in a semiarid basin
on the Qinghai-Tibet Plateau, Biogeosciences, 13, 6273–6284,
https://doi.org/10.5194/bg-13-6273-2016, 2016.
You, Q., Xue, X., Peng, F., Dong, S., and Gao, Y.: Surface water and heat
exchange comparison between alpine meadow and bare land in a permafrost
region of the Tibetan Plateau, Agr. Forest Meteorol., 232, 48–65, 2017.
Yuste, J. C., Janssens, I. A., Carrara, A., Meiresonne, L., and Ceulemans,
R.: Interactive effects of temperature and precipitation on soil respiration
in a temperate maritime pine forest, Tree Physiol., 23, 1263–1270, 2003.
Zhang, T., Wang, G., Yang, Y., Mao, T., and Chen, X.: Grassland types and
season-dependent response of ecosystem respiration to experimental warming in
a permafrost region in the tibetan plateau, Agr. Forest. Meteorol., 247,
271–279, 2017.
Zhang, Y., Dong, S., Gao, Q., Liu, S., Liang, Y., and Cao, X.: Responses of
alpine vegetation and soils to the disturbance of plateau pika
(Ochotona curzoniae) at burrow level on the Qinghai-Tibetan Plateau
of China, Ecol. Eng., 88, 232–236, 2016.
Zhang, Z. and Dong, Z.: Characteristics of aeolian sediment transport over
different land surfaces in northern China, Soil Till. Res., 143, 106–115,
2014.
Zhou, H., Zhou, L., Zhao, X., Yan, Z., Liu, W., and Shi, Y.: The degraded
process and integrated treatment of “black soil beach” type degraded
grassland in the source regions of Yangtze and Yellow Rivers, China J. Ecol.,
22, 51–55, 2003 (in Chinese with English abstract).
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