Maija E. Marushchak
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View article: Contrasting methanotrophic communities between upland and polygonal tundra and their link to nitrogen metabolism and methane uptake in the Western Canadian Arctic
Contrasting methanotrophic communities between upland and polygonal tundra and their link to nitrogen metabolism and methane uptake in the Western Canadian Arctic Open
View article: Microbial mechanisms responsible for diurnal dynamics of N <sub>2</sub> O fluxes in a nutrient-poor subarctic permafrost environment
Microbial mechanisms responsible for diurnal dynamics of N <sub>2</sub> O fluxes in a nutrient-poor subarctic permafrost environment Open
Arctic soils affected by permafrost are generally low in nutrients but highly sensitive to climate warming, which may enhance reactive N availability and subsequently N 2 O emissions. A significant yet often overlooked phenomenon in the Ar…
View article: Boreal Rivers as Sources of Terpenoid Emissions
Boreal Rivers as Sources of Terpenoid Emissions Open
Streams and rivers are biogeochemical hotspots that contribute substantially to inland water CO 2 emissions. However, their role as sources of biogenic volatile organic compounds (BVOCs) remains poorly understood. We quantified terpenoid e…
View article: Practical guidelines for reproducible N<sub>2</sub>O flux chamber measurements in nutrient-poor ecosystems
Practical guidelines for reproducible N<sub>2</sub>O flux chamber measurements in nutrient-poor ecosystems Open
The atmospheric concentration of nitrous oxide (N2O) has increased significantly since 1800, mainly due to agricultural activities. However, due to their large area, nutrient-poor natural soils, including those in the (sub-) Arctic, also p…
View article: Seasonality in Diffusive Methane Emissions Differs Between Bog Microforms
Seasonality in Diffusive Methane Emissions Differs Between Bog Microforms Open
Wetlands are the largest natural source of atmospheric methane (CH 4 ), but substantial uncertainties remain in the global CH 4 budget, partly due to a mismatch in spatial scale between detailed in situ flux measurements and coarse‐resolut…
View article: Microbial community composition explains wintertime greenhouse gas fluxes in an oroarctic tundra ecosystem
Microbial community composition explains wintertime greenhouse gas fluxes in an oroarctic tundra ecosystem Open
Microbial communities play a central role in regulating the greenhouse gas balance in soil ecosystems. Microorganisms are active in the cold, snow-covered Arctic tundra soils; however, their contribution to the greenhouse gas budget during…
View article: Author Correction: Wildfires offset the increasing but spatially heterogeneous Arctic–boreal CO2 uptake
Author Correction: Wildfires offset the increasing but spatially heterogeneous Arctic–boreal CO2 uptake Open
View article: Advancing N <sub>2</sub> O flux chamber measurement techniques in nutrient-poor ecosystems
Advancing N <sub>2</sub> O flux chamber measurement techniques in nutrient-poor ecosystems Open
Nitrous oxide (N2O) is the third most important greenhouse gas, with its atmospheric concentration rising from 273 parts per billion (ppb) to 336 ppb since 1800, primarily due to agricultural activities. However, nutrient-poor natural soil…
View article: Wildfires offset the increasing but spatially heterogeneous Arctic–boreal CO2 uptake
Wildfires offset the increasing but spatially heterogeneous Arctic–boreal CO2 uptake Open
View article: Effect of microtopography on isotopic composition of methane in porewater and efflux at a boreal peatland
Effect of microtopography on isotopic composition of methane in porewater and efflux at a boreal peatland Open
View article: The role of drainage ditches in greenhouse gas emissions and surface leaching losses from a cutaway peatland cultivated with a perennial bioenergy crop
The role of drainage ditches in greenhouse gas emissions and surface leaching losses from a cutaway peatland cultivated with a perennial bioenergy crop Open
We studied greenhouse gas (GHG) emissions from drainage ditches and leaching losses in a boreal cutaway peatland cultivated with reed canary grass (Phalaris arundinacea) for bioenergy. The objectives of the study were to assess to what ext…
View article: Permafrost Region Greenhouse Gas Budgets Suggest a Weak CO<sub>2</sub> Sink and CH<sub>4</sub> and N<sub>2</sub>O Sources, But Magnitudes Differ Between Top‐Down and Bottom‐Up Methods
Permafrost Region Greenhouse Gas Budgets Suggest a Weak CO<sub>2</sub> Sink and CH<sub>4</sub> and N<sub>2</sub>O Sources, But Magnitudes Differ Between Top‐Down and Bottom‐Up Methods Open
Large stocks of soil carbon (C) and nitrogen (N) in northern permafrost soils are vulnerable to remobilization under climate change. However, there are large uncertainties in present‐day greenhouse gas (GHG) budgets. We compare bottom‐up (…
View article: Shoulder season controls on methane emissions from a boreal peatland
Shoulder season controls on methane emissions from a boreal peatland Open
Cold-season emissions substantially contribute to the annual methane budget of northern wetlands, yet they remain underestimated by process-based models. Models show significant uncertainty in their parameterization of processes, particula…
View article: Decadal increases in carbon uptake offset by respiratory losses across northern permafrost ecosystems
Decadal increases in carbon uptake offset by respiratory losses across northern permafrost ecosystems Open
View article: Environmental drivers of increased ecosystem respiration in a warming tundra
Environmental drivers of increased ecosystem respiration in a warming tundra Open
View article: The Net GHG Balance and Budget of the Permafrost Region (2000–2020) From Ecosystem Flux Upscaling
The Net GHG Balance and Budget of the Permafrost Region (2000–2020) From Ecosystem Flux Upscaling Open
The northern permafrost region has been projected to shift from a net sink to a net source of carbon under global warming. However, estimates of the contemporary net greenhouse gas (GHG) balance and budgets of the permafrost region remain …
View article: Seasonal controls on methane flux components in a boreal peatland - combining plant removal and stable isotope analyses
Seasonal controls on methane flux components in a boreal peatland - combining plant removal and stable isotope analyses Open
Wetlands are the largest natural source of atmospheric methane and highly vulnerable to climate change. In our study we aim to better understand the environmental controls on the strength and seasonal variation of methane flux components f…
View article: Advances in measuring low N2O fluxes by a portable gas analyser and manual chambers
Advances in measuring low N2O fluxes by a portable gas analyser and manual chambers Open
Nitrous oxide (N2O) is one of the most important greenhouse gases with a global warming potential of about 298 times stronger than carbon dioxide (CO2) over a period of 100 years. From 1800 to 2023, the atmospheric concentration of N2O has…
View article: Potential nitrogen mobilisation from the Yedoma permafrost domain
Potential nitrogen mobilisation from the Yedoma permafrost domain Open
Permafrost regions, characterised by extensive belowground excess ice, are highly vulnerable to rapid thaw, particularly in areas such as the Yedoma domain. This region is known to freeze-lock a globally significant stock of soil nitrogen …
View article: An increasing Arctic-boreal CO<sub>2</sub>sink offset by wildfires and source regions
An increasing Arctic-boreal CO<sub>2</sub>sink offset by wildfires and source regions Open
The Arctic-Boreal Zone (ABZ) is rapidly warming, impacting its large soil carbon stocks. We use a new compilation of terrestrial ecosystem CO 2 fluxes, geospatial datasets and random forest models to show that although the ABZ was an incre…
View article: High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra
High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra Open
Arctic terrestrial greenhouse gas (GHG) fluxes of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) play an important role in the global GHG budget. However, these GHG fluxes are rarely studied simultaneously, and our understand…
View article: Supplementary material to "Seasonal controls on methane flux components in a boreal peatland – combining plant removal and stable isotope analyses"
Supplementary material to "Seasonal controls on methane flux components in a boreal peatland – combining plant removal and stable isotope analyses" Open
View article: Seasonal controls on methane flux components in a boreal peatland – combining plant removal and stable isotope analyses
Seasonal controls on methane flux components in a boreal peatland – combining plant removal and stable isotope analyses Open
Wetlands are the largest natural source of atmospheric methane and highly vulnerable to climate change. In our study we aim to better understand the environmental controls on the strength and seasonal variation of methane flux components f…
View article: The net GHG balance and budget of the permafrost region (2000-2020) from ecosystem flux upscaling
The net GHG balance and budget of the permafrost region (2000-2020) from ecosystem flux upscaling Open
The northern permafrost region has been projected to shift from a net sink to a net source of carbon under global warming. However, estimates of the contemporary net greenhouse gas (GHG) balance and budgets of the permafrost region remain …
View article: The net GHG balance and budget of the permafrost region (2000-2020) from ecosystem flux upscaling
The net GHG balance and budget of the permafrost region (2000-2020) from ecosystem flux upscaling Open
The northern permafrost region has been projected to shift from a net sink to a net source of carbon under global warming. However, estimates of the contemporary net greenhouse gas (GHG) balance and budgets of the permafrost region remain …
View article: Two decades of permafrost region CO2, CH4, and N2O budgets suggest a small net greenhouse gas source to the atmosphere
Two decades of permafrost region CO2, CH4, and N2O budgets suggest a small net greenhouse gas source to the atmosphere Open
The long-term net sink of carbon (C), nitrogen (N) and greenhouse gases (GHGs) in the northern permafrost region is projected to weaken or shift under climate change. But large uncertainties remain, even on present-day GHG budgets. We comp…
View article: Arctic soil methane sink increases with drier conditions and higher ecosystem respiration
Arctic soil methane sink increases with drier conditions and higher ecosystem respiration Open
View article: High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra
High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra Open
Arctic terrestrial greenhouse gas (GHG) fluxes of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) play an important role in the global GHG budget. However, these GHG fluxes are rarely studied simultaneously, and our understandi…
View article: Supplementary material to "High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra"
Supplementary material to "High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra" Open
We installed the collars 48 hours prior to the flux measurements to minimise the potential disturbance caused by the installation.We sealed the edges of the collars using moist inert quartz sand to secure an air-tight closure.We installed …
View article: Data and code for "High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra"
Data and code for "High-resolution spatial patterns and drivers of terrestrial ecosystem carbon dioxide, methane, and nitrous oxide fluxes in the tundra" Open
Repository structure The zipped folder includes the following subfolders: data In-situ measurement data from the plots. Remotely-sensed data could not be included in the repository due to their large size. sr…