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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

  • Winter climate change in the boreal forest : what does it mean for the forest tree seedlings?
    Riikonen, Johanna; Domisch, Timo; Martz, Françoise
    Essays in biochemistry : 1 (Academic Press, 2026)
    Winter physiological processes are often overlooked in climate change studies of boreal forests, despite their critical role in determining tree survival and carbon balance. Winter climate change is reshaping the environmental constraints that govern boreal forest regeneration, placing increasing pressure on the resilience of tree seedlings. The present mini-review summarises how changing non-growing season temperatures and snow conditions influence the seasonal survival of boreal tree seedlings and the carbon dynamics of both seedlings and soil, with implications for successful forest regeneration. Snow insulates boreal vegetation from extreme cold, regulates light and UV exposure, and shapes spring hydrology. Alterations in snow depth, structure, duration, and melt timing modify soil temperatures, gas exchange, and the snow–soil–root–microbe system, increasing root stress and mortality through deeper frost and hypoxia, ultimately resulting in impaired spring recovery. Winter remains one of the most uncertain parts of the boreal carbon budget, as soils, microbes, and roots continue emitting CO2 and climate change is altering these fluxes and their carryover effects. Boreal forests rely on tightly regulated annual cycles in which cold acclimation and frost hardiness are essential for winter survival, yet warming can delay acclimation, increase vulnerability to warm spells, and advance spring phenology, thereby raising frost-damage risk for seedlings. The post-planting resilience of seedlings can be strengthened by targeted silvicultural planning, nursery, and planting practices that better prepare seedlings to withstand increasingly variable and challenging winter conditions. More research is needed on how boreal forest tree seedlings physiologically and phenologically adapt to changing winter conditions.
  • Soil-plant interactions during early vegetation growth govern HONO, NO and N2O emissions through moisture, temperature, and mineral N pools in boreal agricultural soils
    Bhattarai, Hem Raj; Liimatainen, Maarit; Shurpali, Narasinha J.; Virkajärvi, Perttu; Nykänen, Hannu; Maljanen, Marja
    Plant and soil (Springer Nature, 2026)
    Background and aims: Reactive nitrogen gases (HONO, NO, N2O) are key to atmospheric chemistry and climate forcing, yet their simultaneous in-situ emissions from boreal agricultural soils are poorly known. We aimed to quantify these gases during early crop growth, a period when emerging soil–plant interactions begin to shape soil microclimate and N cycling and to identify the main environmental and vegetation drivers controlling their fluxes. Methods: We quantified in-situ fluxes of HONO, NO, and N2O simultaneously and key soil variables across oat, barley and bare-soil plots in eastern Finland. Further, we applied piecewise structural equation modelling (pSEM) to determine the direct and indirect effects environment and vegetation on gas emissions. Results: Daily emissions (µg N m⁻2 h⁻1) were strongly dominated by N2O (13.5–229), followed by NO (1.5–38.2) and HONO (1.0–13.0). Cumulative fluxes confirmed this hierarchy, with HONO ~ 9–11 times lower than N2O and NO ~ 3 times lower than N2O. pSEM showed that soil temperature and moisture were the main regulators, with HONO and NO emissions increasing with temperature and decreasing with moisture, while N2O was driven solely by temperature. Vegetation indirectly suppressed emissions by increasing soil moisture and lowering soil pH, which reduced nitrite and thus HONO and NO precursor availability, consistent with the lower mean NO fluxes from vegetated compared to bare soil surfaces (17.1 vs. 22.6 µg N m−2 h−1). Conclusion: Our findings show that during early crop growth, soil–plant interactions are strongly shaped by physical drivers especially temperature and moisture which outweigh chemical controls.
  • Microplastic incorporation into soil aggregates of arable land
    Groß, Max; Braun, Melanie; Leonhardt, Johannes; Bogner, Christina; Debastiani, Rafaela; Hennig, Larissa; Hurley, Rachel; Mail, Matthias; Martínez-Hernández, Virtudes; Nizzetto, Luca; Roscher, Ribana; Redondo-Hasselerharm, Paula E.; Scherer, Torsten; Schlierenkamp, Vera; Selonen, Salla; Soinne, Helena; Amelung, Wulf
    Journal of hazardous materials (Elsevier, 2026)
    Agricultural mulch films are widely applied to increase crop productivity but are a significant source of microplastics (MPs) in the environment. We investigated the incorporation of conventional and biodegradable MPs into soil aggregates from agricultural fields in Finland, Germany and Spain, hypothesising that (i) MPs become increasingly occluded within soil aggregates over time, (ii) the extent of occlusion differs between conventional and biodegradable MPs, and (iii) occluded MPs differ in morphology and surface characteristics from free MPs. Arable fields were spiked with MPs derived from either a biodegradable polybutylene adipate terephthalate-starch blend (PBAT/starch) or conventional linear low-density polyethylene (LLDPE) mulch films. Soil samples were collected after two barley-growing seasons, separated into free and occluded fractions, and analysed using digital microscopy and deep learning to quantify MP abundance, size and shape. Surface properties were assessed using scanning electron microscopy. Total MP abundance declined between cropping seasons for both polymer types, while the proportion of aggregate-occluded MPs increased, reaching 76% for PBAT/starch and 65% for LLDPE. Soil exposure altered the size, shape and surface properties of MPs in a polymer-specific manner. Occluded PBAT/starch MPs were larger and more solid than their free counterparts, consistent with protection against weathering and fragmentation within aggregates. Occluded LLDPE MPs were smaller than free particles but also exhibited higher solidity, likely reflecting preferential incorporation of particles with smoother, more uniform edges. We conclude that soil aggregate occlusion is a key mechanism governing MP fate in agricultural soils, promoting particle stability while simultaneously reducing mobility and bioavailability.
  • Consumer heterogeneity and willingness to pay for common reed insulation board : a choice experiment approach
    Häyrinen, Liina; Tienhaara, Annika; Pouta, Eija
    Cleaner and responsible consumption (Elsevier, 2026)
    The growing demand for sustainable construction materials and the need to restore marginal lands have created opportunities for innovative bio-based solutions. Common reed (Phragmites australis) offers both ecological benefits and potential as a renewable insulation material, particularly when cultivated on underutilised land. However, the commercial success of such novel materials depends on consumer acceptance and willingness to pay. This study examines consumer preferences and willingness to pay for insulation boards made from common reed using a discrete choice experiment conducted in Finland in 2024 (N = 2974). Respondents evaluated four insulation boards, namely cellulose wool, stone wool, wood fibre and reed fibre, based on five attributes: thermal insulation, domestic origin, fire safety, environmental friendliness and price. A latent class model identified five consumer segments. One segment (10.7%) displayed a clear preference for reed fibre boards, valuing thermal insulation and environmental benefits while being the least price-sensitive, suggesting higher stated valuation for the material. A younger age, female gender, a background in construction and positive views on the utilisation of marginal lands increased the likelihood of segment membership. While excellent thermal insulation and domestic origin were important across all groups, their relative importance varied. The findings highlight that a distinct group of consumers has a clear preference for reed fibre insulation, especially if marketed with a focus on sustainability and renewability. The study underscores the importance of targeted communication and policy support to facilitate the adoption of novel bio-based construction materials.
  • Suonpohjien ilmastoystävällinen hyödyntäminen : ArvoHiili-hankkeen koontiraportti
    Maanavilja, Liisa; Laakso, Tero; Aro, Lasse; Hassan, Md. Kamrul; Jylhä, Paula; Miettinen, Mirella; Kuittinen, Suvi; Turunen, Jukka; Lauhanen, Risto; Ikkala, Lauri; Wall, Antti; Luokkakallio, Jari; Lind, Jenni; Iivari, Elina; Pappinen, Ari; Pölönen, Ismo
    GTK:n työraportti : 37/2026 (Geologian tutkimuskeskus, 2026)