Jukuri

Tervetuloa käyttämään Jukuria, Luonnonvarakeskuksen (Luke) avointa julkaisuarkistoa. Jukurissa on tiedot Luken julkaisutuotannosta. Osa julkaisuista on vapaasti ladattavissa. Luken muodostaneiden tutkimuslaitosten aikaisemmasta julkaisutuotannosta osan tiedot ovat järjestelmässä jo nyt ja kattavuus paranee jatkuvasti.

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Viimeksi tallennetut

Greenhouse gas (GHG) emissions and removals in the Finnish forest sector over scope 1, 2, and 3
Alam, Ashraful; Ghani, Hafiz Usman; Räty, Tarmo; Leinonen, Ilkka
Resources, conservation & recycling advances (Elsevier, 2026)
Forests play a central role in the Finland’s bioeconomy strategy and are key to addressing climate challenges and achieving national climate neutrality targets. In this context, quantifying the forest sector’s total emissions is essential for supporting effective and evidence-based climate-mitigation planning. This study develops a framework to evaluate the life cycle greenhouse gas emissions of Finland’s forest sector for the year 2023 using an organizational carbon footprinting approach that combines top-down and bottom-up methodologies, and aligned with the Scope 1, Scope 2 and Scope 3 structure. The total life cycle GHG emissions from Finnish forest sector were approximately 8.4 Mt CO₂e. Organic soils are the largest contributors, followed by processing of exported products, upstream emissions from pulp and paper production and transportation of exported items. Most of the emissions originate from Scope 3 sources (approximately 68%), primarily associated with materials and suppliers over which forest-sector stakeholders have no direct control. This was followed by Scope 1 emissions (around 27%) and Scope 2 emissions (around 5%), which together represent roughly 11% of Finland’s total energy-related emissions. Land use, land-use change, and forestry (LULUCF) in Finland’s forest sector result in a net removal, with a value of -0.38 Mt CO₂ eq. The developed framework provides a comprehensive assessment by identifying both chain-specific and scope-specific emission contributions. It also supports annual updates and can be adapted to different geographic regions. Such an approach would offer policy makers a clearer understanding of the forest sector’s role in meeting national and international climate change mitigation targets.
Does Survey Angling CPUE Reflect Population Density of Northern Pike Esox lucius in Small Boreal Lakes?
Turunen, Aatu; Tiainen, Joni; Olin, Mikko; Vainikka, Anssi
Fisheries management and ecology (Wiley-Blackwell, 2026)
Knowing the relationship between catch per unit effort (CPUE) and population density is crucial for the management of recreational fisheries. We conducted standardized angling for pike in 16 lakes (3.4–22.1 ha) to test whether lure type, color, and pike density affect CPUE and the size of captured fish. Angling CPUE (fish h−1 km−1) was statistically significantly related to pike density (fish ha−1), despite the high variation and uncertainty in CPUE estimates. Lure type affected CPUE, whereas water temperature, use of a boat, time of day, and transect fishability had no effect. CPUE was higher when using spoons compared to spinnerbaits, but lure color (fluorescent vs. natural) had no effect. The length of captured fish was not dependent on lure type or color. Our results suggest that a predefined protocol may help reduce variation in CPUE data; however, it does not yet allow for reliable estimation of pike density.
Exploring the relative importance of subsurface drainage parameters, drainage control schedule, peat thickness and topography on groundwater levels in cultivated peat soils
Tähtikarhu, Mika; Hyväluoma, Jari
Acta agriculturae scandinavica section B : soil and plant science : 1 (Taylor & Francis, 2026)
We computationally explored how structurally different factors can control groundwater levels in peat soils. Groundwater levels emerged from the combined impact of different factors. The impact of the factors was in the same order of magnitude. The drainage parameters (median impact -0.22–0.28 m) and terrain slope scenarios (−0.10–0.18 m) affected groundwater levels more than peat thickness (−0.01–0.07 m) in simulations with regular drainage. Drainage control parameters (control depth and schedule) affected groundwater levels more (median impact 0.12–0.32 m) than the drainage parameters (drain depth and spacing, 0.05–0.25 m) in the controlled drainage scenarios. Differences in the control schedule scenarios affected groundwater levels more than the adjustments of the control depth. The impact of controlled drainage was higher in thick (range 0.05–0.45 m) than in thin (0.01–0.33 m) peat soil. The groundwater levels in the different scenarios typically deviated less from each other during the growing seasons (except for the control schedule scenarios and steep upslope conditions), which highlights the challenge of controlling the groundwater levels during growing seasons and the role of the control schedule. Controlled drainage can increase groundwater levels (median ≤0.3 m) in different conditions.
Systemic food web reorganization due to multiple pressures in seven Baltic Sea sub-basins
Faithfull, Carolyn; Taylor, John M; Puntila-Dodd, Riikka; Ito, Maysa; Scotti, Marco; Calkiewicz, Joanna; Labuce, Astra; Margoński, Piotr; Ammar, Yosr; Müller-Karulis, Bärbel; Olin, Mikko; Putnis, Ivars; Jurgensone, Iveta; Silberberger, Marc; Nordström, Marie C; Morkune, Rasa; Tomczak, Maciej T; Adamowicz, Maciej; Zettler, Michael; Bergström, Lena
Ices journal of marine science : 6 (Oxford University Press, 2026)
The Baltic Sea ecosystem is highly impacted by multiple human induced pressures and climate change. Despite this, restoration actions are often directed towards individual measures, ignoring trade-offs and synergies that may affect multiple ecosystem processes and services. Due to the bathymetry of the Baltic Sea, sub-basins may be differently impacted by pressures, making it challenging to observe common patterns and co-occurring processes. Here, we provide the first comprehensive analysis of systemic spatiotemporal changes of food webs across seven Baltic Sea sub-basins. Our analyses cover 26–46 years of harmonized data collection and apply integrated trend analysis in seven sub-basins. We compare temporal trends of key structural food web components, focusing on relative changes between trophic guilds, and interpret these changes in relation to variations in key environmental factors and human pressures. We found shifts in trophic-guild balance and ecosystem reorganization in all sub-basins, which were associated with regional changes in human induced pressures. According to the EU Marine Strategy Framework criteria, this indicates poor food web status across all sub-basins. In some cases, the altered food web regimes have remained despite reductions in the pressures that contributed to the initial shift. Climate warming has played a role, in some cases exacerbating the effects of other human induced pressures. Our results underscore that coordinated actions to reduce pressures such as fishing and nutrient loading are needed to improve food web status in the Baltic Sea.
Roundwood storage methods and their effect on spruce wood quality : a review
Böhm, Stephan; Solt-Rindler, Axel; Vay, Oliver; Prinz, Robert; Grabner, Michael; Kanzian, Christian
Wood material science and engineering (Taylor & Francis, 2026)
Climate-driven increases in calamities are altering timber supply dynamics across Europe, resulting in large volumes of spruce roundwood that cannot be processed immediately. Interim storage buffers timber supply and helps maintain wood quality. Storage decisions involve trade-offs among economic cost, environmental impact, operational feasibility and wood-quality preservation, yet the available knowledge is dispersed across technical and scientific literature. This review synthesises published research on spruce roundwood storage based on 68 studies spanning six decades. Storage methods were classified and evaluated using an integrated framework of biological, chemical and physical quality indicators. The reviewed literature shows that storage conditions, particularly the interaction of moisture availability, oxygen supply, and temperature, govern wood quality development. Dry storage is scalable but offers only short protection. Wet and anaerobic foil storage enable reliable long-term preservation but require higher technical effort. Cold storage is effective yet geographically and seasonally constrained, while live or standing storage provides limited and unpredictable preservation. Overall, no method is universally optimal, but each represents a specific preservation regime with defined operational limits. By linking storage environment to resulting wood condition, this synthesis provides a structured reference for interpreting quality development and selecting suitable storage strategies for spruce roundwood during interim storage.