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Browsing by Author "Liski, Jari"
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Carbon stock changes of forest land in Finland under different levels of wood use and climate change
Sievänen, Risto; Salminen, Olli; Lehtonen, Aleksi; Ojanen, Paavo; Liski, Jari; Ruosteenoja, Kimmo; Tuomi, Mikko (2014-03-01)•Context: Prediction of the effect of harvests and climate change (CC) on the changes in carbon stock of forests is necessary both for CC mitigation and adaptation purposes. •Aims: We assessed the impact of roundwood and ... -
Decomposition and changes in chemical composition of leaf litter of five dominant tree species in a West African tropical forest
Guendehou, G. H Sabin; Liski, Jari; Tuomi, Mikko; Moudachirou, Mansourou; Sinsin, Brice; Mäkipää, Raisa (2014-05)The objective of the research was to study the rate of decomposition and changes in the chemical characteristics in the leaf litter of selected tree species using a litterbag experiment. The decomposition of leaf litter ... -
Forest bioenergy climate impact can be improved by allocating forest residue removal
Repo, Anna; Känkänen, Riina; Tuovinen, Juha Pekka; Antikainen, Riina; Tuomi, Mikko; Vanhala, Pekka; Liski, Jari (2012-02-08)Bioenergy from forest residues can be used to avoid fossil carbon emissions, but removing biomass from forests reduces carbon stock sizes and carbon input to litter and soil. The magnitude and longevity of these carbon ... -
Heterotrophic soil respiration-Comparison of different models describing its temperature dependence
Tuomi, Mikko; Vanhala, Pekka; Karhu, Kristiina; Fritze, Hannu; Liski, Jari (2008-02-24)Several models are used to describe the temperature dependence of heterotrophic soil respiration. Six such models are examined here in detail against incubation measurements from different sources. These models are compared ... -
Impacts of organic amendments on carbon stocks of an agricultural soil - Comparison of model-simulations to measurements
Karhu, Kristiina; Gärdenäs, Annemieke I.; Heikkinen, Jaakko; Vanhala, Pekka; Tuomi, Mikko; Liski, Jari (2012-11-01)Organic amendments such as straw, green manure or farmyard manure are used to mitigate the soil carbon (C) losses from cultivated soils. We investigated the role of various organic amendments with different C quality for ... -
Indirect carbon dioxide emissions from producing bioenergy from forest harvest residues
Repo, Anna; Tuomi, Mikko; Liski, Jari (2011-02-28)Forest harvest residues are important raw materials for bioenergy in regions practicing forestry. Removing these residues from a harvest site reduces the carbon stock of the forest compared with conventional stem-only ... -
Old soil carbon is more temperature sensitive than the young in an agricultural field
Vanhala, Pekka; Karhu, Kristiina; Tuomi, Mikko; Sonninen, Eloni; Jungner, Högne; Fritze, Hannu; Liski, Jari (2007-11-01)Changes in the carbon stock of soil in response to climate change would significantly affect the atmospheric carbon dioxide concentration and consequently climate. The isotopes of carbon provide a means to study the ... -
Organic Chemical Characterization of Decomposing Plant Litter : A Comparison of Methods
Liski, Jari; Repo, Anna; Tuomi, Mikko; Vanhala, Pekka (2013-12-16)There are two common methods to characterize organic chemical composition of decomposing plant litter, a forest products method and a forage fiber method. These methods divide litter into a few fractions based on extractions ... -
Temperature sensitivity of soil carbon fractions in boreal forest soil
Karhu, Kristiina; Fritze, Hannu; Hämäläinen, Kai; Vanhala, Pekka; Jungner, Högne; Oinonen, Markku; Sonninen, Eloni; Tuomi, Mikko; Spetz, Peter; Kitunen, Veikko; Liski, Jari (2010-02-01)Feedback to climate warming from the carbon balance of terrestrial ecosystems depends critically on the temperature sensitivity of soil organic carbon (SOC) decomposition. Still, the temperature sensitivity is not known ... -
Temperature sensitivity of soil organic matter decomposition in southern and northern areas of the boreal forest zone
Vanhala, Pekka; Karhu, Kristiina; Tuomi, Mikko; Björklöf, Katarina; Fritze, Hannu; Liski, Jari (2008-07-01)Much effort has been made to improve understanding of factors controlling the temperature dependence of soil organic matter (SOM) decomposition. The question of how soils formed in different geographical locations and ... -
Transplantation of organic surface horizons of boreal soils into warmer regions alters microbiology but not the temperature sensitivity of decomposition
Vanhala, Pekka; Karhu, Kristiina; Tuomi, Mikko; Björklöf, Katarina; Fritze, Hannu; Hyvärinen, Hasse; Liski, Jari (2009-12-16)Changes in soil carbon, the largest terrestrial carbon pool, are critical for the global carbon cycle, atmospheric CO2 levels and climate. Climate warming is predicted to be most pronounced in the northern regions and ... -
The Yasso07 soil carbon model - Testing against repeated soil carbon inventory
Rantakari, Miitta; Lehtonen, Aleksi; Linkosalo, Tapio; Tuomi, Mikko; Tamminen, Pekka; Heikkinen, Juha; Liski, Jari; Mäkipää, Raisa; Ilvesniemi, Hannu; Sievänen, Risto (2012-12-15)Forest soils store large amounts of carbon (C), and releases of C from this pool may significantly increase the CO 2 concentration in the atmosphere. Organic matter decomposition in soils has been shown to strongly depend ...