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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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Short-term effects of harvesting alternatives on soil nitrous oxide fluxes in a boreal drained peatland forest
Martínez-García, Eduardo; Rautakoski, Helena; Rissanen, Antti J.; Adamczyk, Bartosz; Anttila, Jani; Lehtonen, Aleksi; Li, Qian; Lohila, Annalea; Peltoniemi, Mikko; Sarkkola, Sakari; Ťupek, Boris; Mäkipää, Raisa
Geoderma (Elsevier, 2026)
Extensive areas of boreal peatland forests in the Nordic countries are approaching maturity and face harvesting, yet effects on soil nitrous oxide (N2O) fluxes remain unclear. This study examined short-term changes in soil N2O fluxes following two harvesting methods, clear-cutting (CC) and continuous-cover forestry via selection harvesting (CCF), compared to a non-harvested control (C) in a nutrient-rich, forestry-drained boreal peatland in southern Finland. Fluxes were measured using manual and automated chambers during pre-harvest (2020) and post-harvest (2021–2022) periods, alongside soil physical, chemical, and environmental properties to identify key controls of flux variability. N2O fluxes showed high temporal variation (−39 to 459 μg N2O m–2 h−1), primarily driven by temperature, precipitation, moisture, and water table dynamics, and pronounced spatial variation linked to soil nutrient concentrations (potassium, copper, phosphorus, and nitrogen), bulk density, and temperature. While emissions remained near neutral at the C site, harvesting increased emissions, although not significantly. In the first post-harvest year, annual emissions increased with harvesting intensity, yet no significant differences emerged between CCF and CC. Median [interquartile range] emissions were 0 [25], 163 [533], and 185 [194] mg N2O m−2 y–1 at the C, CCF and CC sites, respectively, with inherent spatial variability strongly influencing their spatial distribution. Limited water table rise at the CCF site and high spatial heterogeneity at the CC site likely constrained clearer treatment differences. Overall, our findings suggest that CCF may better mitigate emissions than CC in nutrient-rich, forestry-drained boreal peatlands, warranting further replicated and long-term research.
Selkämeren silakat edelleen lihavia
Raitaniemi, Jari; Pönni, Jukka; Pursiainen, Annie; Lilja, Juha; Jaala, Erkki
Suomen kalastuslehti : 8 (Kalatalouden Keskusliitto, 2025)
Lessons from a change laboratory in plant health risk management : The dynamics of concept formation
Vänninen, Irene; Querol, Marco Antonio Pereira
Learning, culture and social interaction (Elsevier, 2025)
IPCC default emission factors for boreal drained organic agricultural soils do not capture the enhanced emissions after grass renewal
Hetmanenko, Viktoriia; Lång, Kristiina; Saarnio, Sanna; Kekkonen, Hanna
Boreal environment research (Finnish Environment Institute, 2025)
Based on the default emission factors, grass cultivation on drained organic soils is a lower source of greenhouse gas emissions than an annual crop cultivation. However, the emission factors may be biased because the published measurement data are limited and often short-term. Most of the publications cited in the "2013 Supplement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories: Wetlands" for grasslands on drained organic soils in the boreal climate exclude measurements from long-term leys and do not provide data on GHG emissions following practices such as ploughing, re-seeding, or chemical treatments. Only a limited number of studies document the occurrence of soil tillage and herbicide application during experiments, and those that do often fail to include varied seasonal combinations of these events. This rapid communication highlights the need for long-term greenhouse gases exchange observations across larger variations of grass renewal techniques to provide further insights into carbon and nitrogen emissions from drained organic soils.
Different responses to steady and fluctuating UV-B radiation treatments between two grapevine cultivars, and the underlying photoreceptor mechanisms involved in Arabidopsis
Su-Zhou, Chenxing; Durand, Maxime; Martinez-Abaigar, Javier; Shapiguzov, Alexey; Kangasjärvi, Saijaliisa; Liu, Xu; Robson, Matthew T.
Plant physiology and biochemistry (Elsevier, 2026)
Ultraviolet–B radiation (UV-B) is the most-energetic region of the solar spectrum received by plants and its absorption by leaves requires specialised adaptations. Natural light is essentially dynamic, yet the effects of fluctuating UV-B radiation on plant ecophysiology remain poorly understood. We investigated how two grapevine (Vitis vinifera) cultivars, Tempranillo (red) and Viura (white), respond to fluctuating and steady UV-B treatments in a controlled environment, and explored the underlying processes mediating acclimation using photoreceptor mutants of Arabidopsis thaliana. Plants were grown in a greenhouse under the same daily dose of fluctuating or steady UV-B radiation, paired with their respective attenuated UV-B controls. Leaf chlorophyll epidermal flavonols and photosynthetic capacity were monitored in both cultivars as well as photoassimilates in Arabidopsis. Acclimation was cultivar-specific: whereby flavonol accumulation in response to UV-B was greater in Viura (a 28 % increase), although in Tempranillo within-treatment flavonol accumulation was associated with less inhibition of operating efficiency of photosystem II (ɸPSII). In Arabidopsis, responses to both fluctuating and steady UV-B regimes were primarily mediated by the photoreceptor UV RESISTANCE LOCUS 8, with cryptochromes also contributing to flavonol regulation and playing a greater role in photoassimilate accumulation under steady UV-B. Knowledge of these processes across cultivars and conditions can assist in grapevine selection, to guide photoreceptor-centric approaches on the basis of differences in UV-B-radiation acclimation capacity, and to support vineyard management under naturally variable UV-B conditions. These aspects are increasingly important under current global climate change scenarios for such a widespread crop as grapevine.