Article
Environmental Sciences
Jennifer A. Rogers, Valier Galy, Anne M. Kellerman, Jeffrey P. Chanton, Nikita Zimov, Robert G. M. Spencer
Summary: Research has shown that the input of dissolved organic matter from permafrost in Arctic rivers like the Kolyma River is overwhelmed by the export of modern terrestrial organic matter.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Environmental Sciences
Wenwen Zhao, Yuan Xin, Zhongsheng Zhang, Xuehui Zhang, Haitao Wu
Summary: Little is known about the coupling between mercury (Hg) methylation and soil organic matter decomposition in degraded permafrost in high northern latitudes where climate warming is occurring rapidly. In this study, we conducted an anoxic warming incubation experiment for 87 days to explore the interactions between soil organic matter (SOM) mineralization, dissolved organic matter (DOM), and methylmercury (MeHg) production. The results revealed significant promotion effects of warming on MeHg production, as well as increased greenhouse gas emissions and enhanced DOM fluorescence intensities. These findings highlight the complex relationships between warming, greenhouse gas emissions, and MeHg production in permafrost marshes.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Yanan Liu, Jingya Xue, Zhifan Gui, Lu Zhang, Xiaolong Yao
Summary: This study investigates the photoreactivity of dissolved organic matter (DOM) from different sources in the Lake Taihu basin. The results show that the original composition and sources of DOM are closely related to its photoreactivity. DOM from macrophytes releases soluble components under light exposure, while DOM with higher aromacity shows photobleaching effects and increased humification degree. Allochthonous anthropogenic DOM exhibits stronger photo-ammonification. The form of inorganic nutrient releases during DOM photolysis also varies with the original DOM sources.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Erin N. MacDonald, Suzanne E. Tank, Steven Kokelj, Duane G. Froese, Ryan H. S. Hutchins
Summary: This study used ultrahigh-resolution mass spectrometry to characterize DOM derived from different permafrost end-member types in the western Canadian Arctic, revealing significant variation in DOM composition among the permafrost end-member types. The unique compound characteristics of DOM from various permafrost end-member types are primarily influenced by the parent materials of the permafrost.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Viacheslav I. I. Kharuk, Il'ya A. Petrov, Leonid V. V. Krivobokov, Alexey S. S. Golyukov, Maria L. L. Dvinskaya, Sergei T. T. Im, Alexander S. S. Shushpanov, Kevin T. T. Smith
Summary: The study on the dendroecology of larch in the northernmost forest in the world reveals the complex relationship between tree growth, forest stand establishment, and changing eco-climatic factors. The environmental constraints that limit larch growth in this harsh habitat include soil moisture, winter winds, and low air temperature. Larch growth is influenced by air temperature, soil moisture anomalies, and winter wind speed, with significant differences before and after the 2000s. The length of the growing season and larch growth are sensitive to air temperature, and the adverse influence of winter winds has decreased over time. Soil moisture also affects larch growth, with wet, cold soils having a negative influence, while decreased soil moisture in the northern lowlands favors increased larch growth. Larch growth is strongly correlated with GPP and NPP, indicating that this Arctic region continues to be a carbon sink.
REGIONAL ENVIRONMENTAL CHANGE
(2023)
Article
Environmental Sciences
C. Beer, A. Runge, G. Grosse, G. Hugelius, C. Knoblauch
Summary: Studies show that retrogressive thaw slumps (RTSs) in Siberia have transformed a previously neutral ecosystem into a significant source of carbon dioxide. These RTSs are releasing approximately 367 +/- 213 gC m-1 a-1 of CO2 annually, which is relatively insignificant on a global scale. However, depending on the future evolution of permafrost thaw and the affected area, these hillslope processes may become a major contributor to additional CO2 emissions.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Sarah Ellen Johnston, Kerri Finlay, Robert G. M. Spencer, David E. Butman, Mackenzie Metz, Robert Striegl, Matthew J. Bogard
Summary: Zooplankton communities release chemically complex dissolved organic matter (DOM) with significant ecological and biogeochemical contributions to aquatic ecosystems, but this source is often overlooked. This study reveals the composition of zooplankton-derived DOM inputs, highlighting the rich chemical diversity of linkages between animals and lower trophic levels.
Article
Environmental Sciences
Norbert Kamjunke, Liza-Marie Beckers, Peter Herzsprung, Wolf von Tumpling, Oliver Lechtenfeld, Joerg Tittel, Ute Risse-Buhl, Michael Rode, Alexander Wachholz, Rene Kallies, Tobias Schulze, Martin Krauss, Werner Brack, Sara Comero, Bernd Manfred Gawlik, Hello Skejo, Simona Tavazzi, Giulio Mariani, Dietrich Borchardt, Markus Weitere
Summary: This study investigated autotrophic processes, heterotrophic carbon utilization, and micropollutant concentrations in the River Elbe, Germany, using a Lagrangian sampling design. The results showed that under base flow conditions, there was an increase in phytoplankton biomass and photosynthesis from upstream to downstream, while concentrations of dissolved macronutrients decreased. Bacterial abundance and production increased less than in wetter years, and there were changes in bacterial community composition downstream. DOM components increased due to microbial production, while some pollutants showed higher concentrations downstream. However, their magnitudes were not distinctly different from conditions at medium discharges.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
M. Behnke, W. McClelland, S. E. Tank, A. M. Kellerman, R. M. Holmes, N. Haghipour, T. Eglinton, P. A. Raymond, A. Suslova, A. Zhulidov, T. Gurtovaya, N. Zimov, S. Zimov, E. A. Mutter, E. Amos, R. G. M. Spencer
Summary: Climate change is significantly impacting Arctic ecosystems, altering the sources, composition, and fate of riverine dissolved organic matter in the Arctic Ocean. DOM composition shows synchrony and stability across the pan-Arctic, with potential changes in sources and export anticipated with future warming.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Environmental Sciences
Stephanie Shousha, Roxane Maranger, Jean-Francois Lapierre
Summary: This study quantified the changes in dissolved organic matter (DOM) composition and nutrient forms along a river with different land use and seasonal patterns. The results showed significant spatial and temporal shifts in DOM composition associated with different nutrient forms. These changes indicated contrasting loading and processing potential depending on land use and seasonal patterns.
Article
Environmental Sciences
Zhou Liang, Robert T. Letscher, Angela N. Knapp
Summary: Surface ocean bulk and semi-labile dissolved organic matter (DOM) stoichiometry vary across ocean regions with global means of 387:26:1 and 179:20:1, respectively. Surface ocean DOC:DOP and DON:DOP concentration ratios are more variable than DOC:DON concentration ratios. Surface ocean gradients in P-depleted DOM stoichiometries in the Pacific and Atlantic basins reflect variable nutrient stress.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Ecology
Joao Henrique F. Amaral, Jacob R. Gaddy, Thomas S. Bianchi, Todd Z. Osborne, Susan Newman, Jacob Dombrowski, Elise S. Morrison
Summary: The study found that dissolved organic matter (DOM) plays an important role in the phosphorus (P) and nitrogen (N) cycle in treatment wetlands. However, the examination of coupled biogeochemical cycling in treatment wetlands has been limited. The research also showed that solar exposure alters DOM turnover and its relationship with nutrient concentrations, and that the DOM of treatment wetland inflow water is predominantly composed of terrestrial sources.
ECOLOGICAL ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Ruslan Shakhmatov, Shuhei Hashiguchi, Trofim C. Maximov, Atsuko Sugimoto
Summary: Studied the effects of changing snow cover depth and melt timing on the taiga forest ecosystem in Eastern Siberia. Found that in the snow removal area, soil temperature decreased, snowmelt was earlier, soil temperature was higher, but needle elongation was delayed and leaf chemistry differed.
PROGRESS IN EARTH AND PLANETARY SCIENCE
(2022)
Article
Plant Sciences
Nikolay V. Lobus, Anton M. Glushchenko, Alexander A. Osadchiev, Yevhen I. Maltsev, Dmitry A. Kapustin, Olga P. Konovalova, Maxim S. Kulikovskiy, Ivan N. Krylov, Anastasia N. Drozdova
Summary: Dissolved organic matter (DOM) is an important component in aquatic environments, playing a key role in the biogeochemical cycles. This study used fluorescence spectroscopy to examine the fluorescent fraction of DOM (FDOM) produced by five strains of microalgae isolated from the Ob and Yenisei gulfs. The results showed the presence of protein-like and humic-like fluorescence components. Additionally, the study confirmed the possibility of autochthonous production of humic-like FDOM in the Arctic shelf regions.
Article
Ecology
Viacheslav I. Kharuk, Evgeny G. Shvetsov, Ludmila V. Buryak, Alexei S. Golyukov, Maria L. Dvinskaya, Il'ya A. Petrov
Summary: Warming in the larch range has led to increased fires and burned areas. The study shows that fires play a crucial role in larch regeneration and forest existence. Fire frequency and intensity, as well as burned areas, have increased due to global warming.
Article
Geochemistry & Geophysics
Vasileios Mavromatis, Anatoly S. Prokushkin, Mikhail A. Korets, Jerome Chmeleff, Stephanie Mounic, Oleg S. Pokrovsky
Article
Environmental Sciences
Manuel Helbig, James Michael Waddington, Pavel Alekseychik, Brian D. Amiro, Mika Aurela, Alan G. Barr, T. Andrew Black, Peter D. Blanken, Sean K. Carey, Jiquan Chen, Jinshu Chi, Ankur R. Desai, Allison Dunn, Eugenie S. Euskirchen, Lawrence B. Flanagan, Inke Forbrich, Thomas Friborg, Achim Grelle, Silvie Harder, Michal Heliasz, Elyn R. Humphreys, Hiroki Ikawa, Pierre-Erik Isabelle, Hiroki Iwata, Rachhpal Jassal, Mika Korkiakoski, Juliya Kurbatova, Lars Kutzbach, Anders Lindroth, Mikaell Ottosson Lofvenius, Annalea Lohila, Ivan Mammarella, Philip Marsh, Trofim Maximov, Joe R. Melton, Paul A. Moore, Daniel F. Nadeau, Erin M. Nicholls, Mats B. Nilsson, Takeshi Ohta, Matthias Peichl, Richard M. Petrone, Roman Petrov, Anatoly Prokushkin, William L. Quinton, David E. Reed, Nigel T. Roulet, Benjamin R. K. Runkle, Oliver Sonnentag, Ian B. Strachan, Pierre Taillardat, Eeva-Stiina Tuittila, Juha-Pekka Tuovinen, Jessica Turner, Masahito Ueyama, Andrej Varlagin, Martin Wilmking, Steven C. Wofsy, Vyacheslav Zyrianov
NATURE CLIMATE CHANGE
(2020)
Article
Multidisciplinary Sciences
B. M. Rodriguez-Cardona, A. A. Coble, A. S. Wymore, R. Kolosov, D. C. Podgorski, P. Zito, R. G. M. Spencer, A. S. Prokushkin, W. H. McDowell
SCIENTIFIC REPORTS
(2020)
Article
Environmental Sciences
Sung-Bin Park, Alexander Knohl, Mirco Migliavacca, Tea Thum, Timo Vesala, Olli Peltola, Ivan Mammarella, Anatoly Prokushkin, Olaf Kolle, Jost Lavric, Sang Seo Park, Martin Heimann
Summary: Climate change affects the carbon uptake process of vegetation in the northern Eurasian terrestrial ecosystem, with both coniferous forests and bogs acting as weak net CO2 sinks under certain conditions. Coniferous forests become net CO2 sinks earlier than bogs, and both ecosystems persist as net CO2 sinks once the temperature rises. In 2015, anomalously high air temperatures led to the highest net ecosystem productivity in both ecosystems. Monitoring flux measurements at the site level, especially during the winter to spring transition, is crucial for understanding the ecosystem responses to spring warming in northern Eurasia.
Article
Environmental Sciences
Alexey Panov, Anatoly Prokushkin, Karl Robert Kubler, Mikhail Korets, Anastasiya Urban, Mikhail Bondar, Martin Heimann
Summary: This study presents the first results of continuous observations of atmospheric CO2 and CH4 dry mole fractions at a newly operated station in the pan-Arctic region. The station located on the western coast of the Taimyr Peninsula provides valuable data for understanding carbon turnover in the Arctic environment.
Article
Forestry
Alexey A. Dymov, Irina D. Grodnitskaya, Evgenia Yakovleva, Yuri A. Dubrovskiy, Ivan N. Kutyavin, Viktor V. Startsev, Evgeni Yu Milanovsky, Anatoly S. Prokushkin
Summary: Albic podzols under pine forests are more prone to fires. Fires affect the soil's chemical properties, microbiological characteristics, and the composition and structure of soil organic matter, which persist for a long time. The study compared albic podzols in Central Siberia and the European North and found similarities in morphological and physicochemical properties, but differences in polycyclic aromatic hydrocarbons (PAHs) content and microbial biomass.
Article
Environmental Sciences
Alexey Panov, Anatoly Prokushkin, Igor Semiletov, Karl Kuebler, Mikhail Korets, Ilya Putilin, Anastasiya Urban, Mikhail Bondar, Martin Heimann
Summary: Observations of CO2 and CH4 in the pan-Arctic region are limited, hindering our understanding of carbon turnover and permafrost reservoirs. This paper presents the observations from a measurement station in Siberia and analyzes the contributions of land and ocean, as well as the temporal patterns of CO2 and CH4.
Article
Environmental Sciences
Irina V. Tokareva, Anatoly S. Prokushkin
Summary: Accelerated rates of warming in high latitudes lead to changes in nutrient concentrations in Arctic rivers, with permafrost degradation and nutrient cycling playing important roles. This study analyzed dissolved nutrient concentrations in the Yenisei River over multiple years, revealing significant seasonal variations and different patterns between upper and lower river sections. Spring floods were found to have the greatest impact on annual nutrient fluxes, while the summer-fall season exhibited the lowest dissolved inorganic phosphorus and nitrogen fluxes due to biological uptake and chemostasis.
Article
Green & Sustainable Science & Technology
Nikolay Gorbach, Viktor Startsev, Anton Mazur, Evgeniy Milanovskiy, Anatoly Prokushkin, Alexey Dymov
Summary: Wildfires pose a threat to boreal ecosystems and cause significant changes in organic horizons. This study examined the effects of fire on organic horizon properties using a forest litter burning experiment. Results showed that fire increased pH values, electrical conductivity, and specific surface area, while decreasing total carbon and nitrogen content. Additionally, the aromaticity of organic matter increased after the fire. These findings contribute to our understanding of how fire impacts organic matter.
Article
Plant Sciences
Viktor Startsev, Nikolay Gorbach, Anton Mazur, Anatoly Prokushkin, Lyudmila Karpenko, Alexey Dymov
Summary: This paper presents a reconstruction of the dynamics of fires in the middle taiga of Western Siberia in the Holocene. The study reveals that peatlands in this region were prone to fires throughout the Holocene. The content of charcoal particles and polyaromatic hydrocarbons (PAHs) are reliable markers of pyrogenesis.
Article
Ecology
Alexey A. A. Dymov, Viktor V. V. Startsev, Evgenia V. V. Yakovleva, Yurii A. A. Dubrovskiy, Evgenii Yu. Milanovsky, Dariy A. A. Severgina, Alexey V. V. Panov, Anatoly S. S. Prokushkin
Summary: This paper presents a study on the effects of forest fires on the morphological and physicochemical properties of Albic Podzols under pine forests in Siberia. The results show that forest fires lead to changes in acidity, water-soluble carbon and nitrogen compounds, and the content of light polycyclic aromatic hydrocarbons in the soil. The study also finds correlations between the thickness and moisture content of organic horizons and the content of PAHs with the time elapsed after the fire. Overall, the article highlights the conserved and changing factors in boreal forests of Russia under the impact of fires.
Article
Biodiversity Conservation
Aleksandr F. Sabrekov, Irina E. Terentieva, Gregory J. McDermid, Yuriy V. Litti, Anatoly S. Prokushkin, Mikhail V. Glagolev, Alexey V. Petrozhitskiy, Peter N. Kalinkin, Dmitry V. Kuleshov, Ekaterina V. Parkhomchuk
Summary: The expansive plains of West Siberia contain significant carbon stocks, with extensive peatland complex overlying the largest-known hydrocarbon basin. Several methane seeps have been discovered in this area, and three hypotheses were proposed to explain their origin and migration pathways. The study used geochemical tools to test these hypotheses and found that the primary source of seep methane is the organic matter in raised bogs, with varying production pathways. The findings highlight the importance of methane lateral migration in West Siberia's bog-dominated landscapes and its potential occurrence in similar landscapes across the boreal-taiga biome.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Environmental Sciences
Arisiya A. Byzaakay, Larisa G. Kolesnichenko, Iury Ia. Kolesnichenko, Aldynay O. Khovalyg, Tatyana V. Raudina, Anatoly S. Prokushkin, Inna V. Lushchaeva, Zoia N. Kvasnikova, Sergey N. Vorobyev, Oleg S. Pokrovsky, Sergey Kirpotin
Summary: This study investigates the carbon cycle in inland waters in Central Asian mountain regions, including carbon concentrations and CO2 emissions. The research reveals the significant impact of environmental factors on CO2 concentration and emissions.
Article
Environmental Studies
Anastasia Makhnykina, Alexey Panov, Anatoly Prokushkin
Summary: Boreal forest ecosystems are vulnerable to climate change and may switch from being carbon sinks to emitting atmospheric carbon. Wildfires play a significant role in ecosystem modification and functioning. The effect of wildfires on soil CO2 emission rates was studied using a fire chronosequence and it was found that the rates varied based on the successional stage and were influenced by factors such as soil moisture and temperature.
Article
Ecology
A. F. Osipov, V. V. Startsev, A. S. Prokushkin, A. A. Dymov
Summary: Soils are the largest reservoir of organic carbon in terrestrial ecosystems, but current estimates of soil organic carbon (SOC) vary widely. This study aimed to determine the influence of soil group and dominant tree species on mean SOC in forest ecosystems of the Krasnoyarsk Region. The results showed that different soil groups had a significant effect on SOC, while dominant tree species did not. These calculated values can be used as a basis for creating a SOC database for the forests of the Krasnoyarsk Region.
THEORETICAL AND APPLIED ECOLOGY
(2023)
