Search Results - "MARTIKAINEN, Pertti J"

Increased nitrous oxide emissions from Arctic peatlands after permafrost thaw by Voigt, Carolina, Marushchak, Maija E., Lamprecht, Richard E., Jackowicz-Korczyński, Marcin, Lindgren, Amelie, Mastepanov, Mikhail, Granlund, Lars, Christensen, Torben R., Tahvanainen, Teemu, Martikainen, Pertti J., Biasi, Christina

“…Permafrost in the Arctic is thawing, exposing large carbon and nitrogen stocks for decomposition. Gaseous carbon release from Arctic soils due to permafrost…”
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Lakes as nitrous oxide sources in the boreal landscape by Kortelainen, Pirkko, Larmola, Tuula, Rantakari, Miitta, Juutinen, Sari, Alm, Jukka, Martikainen, Pertti J.

“…Estimates of regional and global freshwater N2O emissions have remained inaccurate due to scarce data and complexity of the multiple processes driving N2O…”
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A review of the importance of mineral nitrogen cycling in the plant-soil-microbe system of permafrost-affected soils—changing the paradigm by Ramm, Elisabeth, Liu, Chunyan, Ambus, Per, Butterbach-Bahl, Klaus, Hu, Bin, Martikainen, Pertti J, Marushchak, Maija E, Mueller, Carsten W, Rennenberg, Heinz, Schloter, Michael, Siljanen, Henri M P, Voigt, Carolina, Werner, Christian, Biasi, Christina, Dannenmann, Michael

“…Abstract The paradigm that permafrost-affected soils show restricted mineral nitrogen (N) cycling in favor of organic N compounds is based on the observation…”
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Rising methane emissions from boreal lakes due to increasing ice-free days by Guo, Mingyang, Zhuang, Qianlai, Tan, Zeli, Shurpali, Narasinha, Juutinen, Sari, Kortelainen, Pirkko, Martikainen, Pertti J

“…Lakes account for about 10% of the boreal landscape and are responsible for approximately 30% of biogenic methane emissions that have been found to increase…”
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Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw by Voigt, Carolina, Marushchak, Maija E., Mastepanov, Mikhail, Lamprecht, Richard E., Christensen, Torben R., Dorodnikov, Maxim, Jackowicz‐Korczyński, Marcin, Lindgren, Amelie, Lohila, Annalea, Nykänen, Hannu, Oinonen, Markku, Oksanen, Timo, Palonen, Vesa, Treat, Claire C., Martikainen, Pertti J., Biasi, Christina

“…Permafrost peatlands are biogeochemical hot spots in the Arctic as they store vast amounts of carbon. Permafrost thaw could release part of these long‐term…”
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Emissions of atmospherically reactive gases nitrous acid and nitric oxide from Arctic permafrost peatlands by Bhattarai, Hem Raj, Marushchak, Maija E, Ronkainen, Jussi, Lamprecht, Richard E, Siljanen, Henri M P, Martikainen, Pertti J, Biasi, Christina, Maljanen, Marja

“…Abstract Soils are important sources of nitric oxide (NO) and nitrous acid (HONO) in the atmosphere. These nitrogen (N)-containing gases play a crucial role in…”
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Acidic northern soils as sources of atmospheric nitrous acid (HONO) by Maljanen, Marja, Yli-Pirilä, Pasi, Hytönen, Jyrki, Joutsensaari, Jorma, Martikainen, Pertti J.

“…The photolysis of nitrous acid (HONO) is an important source of OH radical, the key oxidizing agent in the atmosphere. Recently it has been reported that…”
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Large N2O emissions from cryoturbated peat soil in tundra by Repo, Maija E., Susiluoto, Sanna, Lind, Saara E., Jokinen, Simo, Elsakov, Vladimir, Biasi, Christina, Virtanen, Tarmo, Martikainen, Pertti J.

“…Nitrous oxide is a potent greenhouse gas whose concentration is increasing in the atmosphere; the highest emissions have been observed from agricultural and…”
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The role of Sphagnum mosses in the methane cycling of a boreal mire by Larmola, Tuula, Tuittila, Eeva-Stiina, Tiirola, Marja, Nykänen, Hannu, Martikainen, Pertti J, Yrjälä, Kim, Tuomivirta, Tero, Fritze, Hannu

“…Peatlands are a major natural source of atmospheric methane (CH 4 ). Emissions from Sphagnum- dominated mires are lower than those measured from other mire…”
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Sediment respiration and lake trophic state are important predictors of large CO₂ evasion from small boreal lakes by KORTELAINEN, PIRKKO, RANTAKARI, MIITTA, HUTTUNEN, JARI T, MATTSSON, TUIJA, ALM, JUKKA, JUUTINEN, SARI, LARMOLA, TUULA, SILVOLA, JOUKO, MARTIKAINEN, PERTTI J

“…We show that sediment respiration is one of the key factors contributing to the high CO₂ supersaturation in and evasion from Finnish lakes, and evidently also…”
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Carbon fluxes from a tropical peat swamp forest floor by Jauhiainen, Jyrki, Takahashi, Hidenori, Heikkinen, Juha E. P., Martikainen, Pertti J., Vasander, Harri

“…A tropical ombrotrophic peatland ecosystem is one of the largest terrestrial carbon stores. Flux rates of carbon dioxide (CO2) and methane (CH4) were studied…”
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Fluxes of methane, carbon dioxide and nitrous oxide in boreal lakes and potential anthropogenic effects on the aquatic greenhouse gas emissions by Huttunen, Jari T., Alm, Jukka, Liikanen, Anu, Juutinen, Sari, Larmola, Tuula, Hammar, Taina, Silvola, Jouko, Martikainen, Pertti J.

“…We have examined how some major catchment disturbances may affect the aquatic greenhouse gas fluxes in the boreal zone, using gas flux data from studies made…”
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Microbial Respiration in Arctic Upland and Peat Soils as a Source of Atmospheric Carbon Dioxide by Biasi, Christina, Jokinen, Simo, Marushchak, Maija E, Hämäläinen, Kai, Trubnikova, Tatiana, Oinonen, Markku, Martikainen, Pertti J

“…Knowledge on soil microbial respiration (SMR) rates and thus soil-related CO₂ losses from Arctic soils is vital because of the crucial importance of this…”
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N₂O emissions from boreal grass and grass - clover pasture soils by Virkajärvi, Perttu, Maljanen, Marja, Saarijärvi, Kirsi, Haapala, Jaana, Martikainen, Pertti J

“…We studied the annual N₂O emissions from boreal dairy pastures in Eastern Finland. The N₂O emissions were measured with a chamber technique from a…”
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Trophic transfer of polychlorinated biphenyls (PCB) in a boreal lake ecosystem: Testing of bioaccumulation models by Figueiredo, Kaisa, Mäenpää, Kimmo, Leppänen, Matti T., Kiljunen, Mikko, Lyytikäinen, Merja, Kukkonen, Jussi V.K., Koponen, Hannu, Biasi, Christina, Martikainen, Pertti J.

“…Understanding the fate of persistent organic chemicals in the environment is fundamental information for the successful protection of ecosystems and humans. A…”
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Direct experimental evidence for the contribution of lime to CO2 release from managed peat soil by Biasi, Christina, Lind, Saara E, Pekkarinen, Niina M, Huttunen, Jari T, Shurpali, Narasinha J, Hyvönen, Niina P, Repo, Maija E, Martikainen, Pertti J

“…Liming is a common management practice used to achieve optimum pH for plant growth in agricultural soils. Addition of lime to the soil, however, may cause CO2…”
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Survival of Mycobacterium avium, Legionella pneumophila, Escherichia coli, and Caliciviruses in Drinking Water-Associated Biofilms Grown under High-Shear Turbulent Flow by Lehtola, Markku J, Torvinen, Eila, Kusnetsov, Jaana, Pitkänen, Tarja, Maunula, Leena, von Bonsdorff, Carl-Henrik, Martikainen, Pertti J, Wilks, Sandra A, Keevil, C. William, Miettinen, Ilkka T

“…Most of the bacteria in drinking water distribution systems are associated with biofilms. In biofilms, their nutrient supply is better than in water, and…”
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Microbial communities, biomass, and activities in soils as affected by freeze thaw cycles by Koponen, Hannu T., Jaakkola, Tuula, Keinänen-Toivola, Minna M., Kaipainen, Saara, Tuomainen, Jaana, Servomaa, Kristina, Martikainen, Pertti J.

“…Two Finnish agricultural soils (peat soil and loamy sand) were exposed to four freeze-thaw cycles (FTC), with a temperature change from −17.3±0.4 °C to…”
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Survival of Mycobacterium avium in Drinking Water Biofilms as Affected by Water Flow Velocity, Availability of Phosphorus, and Temperature by Torvinen, Eila, Lehtola, Markku J, Martikainen, Pertti J, Miettinen, Ilkka T

“…Mycobacterium avium is a potential pathogen occurring in drinking water systems. It is a slowly growing bacterium producing a thick cell wall containing…”
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Effect of ammonium and oxygen on methane and nitrous oxide fluxes across sediment–water interface in a eutrophic lake by Liikanen, Anu, Martikainen, Pertti J.

“…Eutrophication has decreased the O 2 content and increased the NH 4 + availability in freshwaters. These changes may affect carbon and nitrogen transformation…”
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