Luke
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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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  • Metsäsektorin suhdannekatsaus 2026-2027
    Kniivilä, Matleena; Viitanen, Jari; Haltia, Emmi; Kallioniemi, Marja; Kilpeläinen, Harri; Leppänen, Jussi; Mutanen, Antti; Niinistö, Tuomas; Routa, Johanna; Toikka, Markus; Viitala, Esa-Jussi
    Luonnonvara- ja biotalouden tutkimus : 59/2026 (Luonnonvarakeskus, 2026)
    Metsäsektorin suhdannekatsauksessa tuotetaan tietoa metsäsektorin nykytilanteesta ja lähiajan näkymistä. Ennusteet perustuvat julkisiin tilastoihin, maailmantalouden kehitysennusteisiin, eri lähteistä saatavaan metsäsektorin markkinainformaatioon sekä Luonnonvarakeskuksessa tehtäviin tutkimuksiin. Ennusteiden tekemisessä käytetään niin sanottua johdetun kysynnän periaatetta, jolloin kotimaan ja vientimarkkinoiden talouskehitysten vaihteluiden oletetaan heijastuvan metsäteollisuustuotteiden kysynnän kautta metsäteollisuuden tuotantoon ja kotimaan puumarkkinoille. Käsitys maailmantalouden ja vientimarkkinoiden talouskehityksestä muodostetaan eri organisaatioiden (esimerkiksi OECD, IMF, ETLA, Nordea, Suomen Pankki) ennusteiden perusteella. Tämän katsauksen ennusteet perustuvat syys-lokakuun 2026 tietoihin metsäsektorista ja ennusteisiin maailmantalouden kehityksestä vuosille 2026–2027. Metsäsektorin ennusteet vastaavat tutkijoiden käsitystä todennäköisimmästä kehityksestä. Ne ovat piste-ennusteita ja pohjautuvat vientimarkkinoiden kasvuennusteisiin sekä muihin taustaoletuksiin markkinoiden kehityksestä. Syksyllä 2026 merkittävimmät ennusteisiin ja talouskehitykseen liittyvät epävarmuustekijät liittyvät Iranin sodan vaikutuksiin energiamarkkinoilla, Yhdysvaltojen kauppapolitiikkaan, Kiinan talouden kasvuvauhtiin, Venäjän hyökkäyssodan jatkumiseen Ukrainassa sekä näiden vaikutuksiin maailmankauppaan, inflaatioon ja investointeihin.
  • Long‐term fish assemblage responses to instream restoration in boreal streams: insights from a 24‐year BACI study
    Vehanen, Teppo; Huusko, Ari; Mäki‐Petäys, Aki; Muotka, Timo; Louhi, Pauliina
    Freshwater biology : 10 (Wiley-Blackwell, 2026)
    Freshwater ecosystems are increasingly threatened by human activities and climate change, emphasizing the need for effective habitat restoration supported by long-term monitoring.We examined fish species responses to instream restoration in six boreal streams in northern Finland over a 24-year period (1999–2022) using a Before–After–Control–Impact (BACI) design, including 3 years before and 21 years after restoration. Each stream contained three reaches: one restored with large woody debris and stones (LWD + s), one with added stones only and one left as a control. Using generalized linear mixed models, we assessed the effects of restoration type, water temperature and discharge on total fish density and biomass as well as on key species, brown trout (Salmo trutta), burbot (Lota lota) and European bullhead (Cottus gobio).Overall fish abundance and biomass declined over time, including in control reaches, suggesting a shifting baseline of ecological conditions. However, LWD + s-restored reaches showed weaker long-term declines in fish density and biomass than control reaches, indicating that wood additions buffered fish populations against long-term environmental deterioration. Brown trout showed more positive long-term responses in reaches containing LWD + s, whereas burbot responses were more strongly associated with stone additions, reflecting species-specific habitat preferences. European bullhead was not affected by restoration. Rising water temperatures and variable flows were associated with reduced fish densities, consistent with regional climatic trends.Our results demonstrate that while local restoration can mitigate habitat degradation, its success is constrained by broader hydrological and thermal variability. Effective river management in boreal regions may require integrating catchment-level water retention measures with instream habitat enhancement, supported by sustained long-term BACI-based monitoring to capture delayed ecological responses.
  • Wood type influences tree responses to recurring hot and dry summer tree water deficits across European forests
    Nikinmaa, Laura; Stegehuis, Annemiek I.; Lindner, Marcus; Zweifel, Roman; Teuling, Adriaan J.; von Arx, Georg; Van Meerbeek, Koenraad; Salomón, Roberto L.; Bär, Andreas; Bellan, Michal; Berveiller, Daniel; Blaženec, Miroslav; Čada, Vojtěch; Carraro, Vinicio; Cecchini, Sébastien; Conedera, Marco; Delpierre, Nicolas; Delzon, Sylvain; Ditmarová, L'ubica; Edvardsson, Johannes; Ehekircher, Stefan; Fonti, Patrick; Forner-Sales, Alicia; Galvagno, Marta; Ganthaler, Andrea; Hentschel, Rainer; Janda, Pavel; Ježík, Marek; Kahle, Hans-Peter; Kempf, Jean; Krejza, Jan; Kuberski, Łukasz; Lebourgeois, François; Lerink, Bas; Limousin, Jean-Marc; Lorentz, Sophie; Matula, Radim; Mayr, Stefan; Mikoláš, Martin; Nabuurs, Gert-Jan; Oberhuber, Walter; Obojes, Nikolaus; Osborne, Bruce; Petitjean, Caroline; Plichta, Roman; Rathgeber, Cyrille B.K.; Sass-Klaassen, Ute; Saunders, Matthew; Smiljanic, Marko; Stangler, Dominik F.; Steppe, Kathy; Stereńczak, Krzysztof; Stojanović, Marko; Střelcová, Katarína; Světlík, Jan; Svoboda, Miroslav; Tobin, Brian; Trotsiuk, Volodymyr; Urban, Josef; Valladares, Fernando; Vejpustková, Monika; Walthert, Lorenz; Wilmking, Martin; Zin, Eva; Zou, Junliang; Muys, Bart
    European journal of forest research (Springer Nature, 2026)
    Increasingly frequent summer droughts are intensifying stem dehydration across European forests, constraining tree growth and resilience. Even mild water-related stress can inhibit tree growth, although its impact is species-specific. Tree water deficit (TWD), a measure deduced from radial stem contraction during drought, reflects stem water status and can be used as a proxy for the physiological drought stress experienced by trees. Using high-resolution dendrometer measurements representing 29 tree species from 130 forest sites across Europe from 2003 to 2018, we examined how the length of TWD periods during summer is related to their recurrence within the same year, to TWD intensity, to climate factors, and to wood type (i.e., tracheid-based coniferous, ring-porous or diffuse-porous anatomy). A greater degree of incomplete rehydration, indicated by highest minimum TWD during TWD periods (70% increase of expected response for conifers and ring-porous species, 42% increase of expected response for diffuse-porous), together with warmer temperature (44% increase of expected response for all wood types) and stronger drought, prolonged the length of TWD periods. However, the recurrence of TWD periods only increased the length of the subsequent TWD period within the same year for diffuse-porous tree species (12% increase of expected response). Our results show that wood type and its associated functional traits influence tree responses to recurring stem dehydration periods. The greater sensitivity of diffuse-porous species to recurring TWD periods suggests that wood type anatomy may play an important role in determining how tree species cope with increasingly frequent summer droughts.
  • A Finnish researcher's perspective on legacy phosphorus
    Uusitalo, Risto
    Journal of environmental quality : 5 (John Wiley & Sons, 2026)
  • Desired Futures for Arctic industries : Finding a balance between traditions and new growth : ArcticHubs policy brief
    Tuulentie, Seija; Rikkonen, Pasi; Rikkonen, Taru; Inkilä, Esa; Lynge-Pedersen, Kristine; Lidestav, Gun; Sandström, Per; Sandström, Stefan; Iversen, Audun; Robersen, Roy; Bogadóttir, Ragnheiður; Vang, Elisa; Ólafsdóttir, Rannveig; Edvardsdóttir, Anna Guðrún; Bishop, Michael; Miettinen, Janne; Rautio, Pasi (Luonnonvarakeskus, 2024)
    ArcticHubs (2020-2024) is a Horizon EU project that develops tools to promote sustainable development of industrial and cultural hubs in the Arctic.This policy brief focuses on recommendations for Arctic stakeholders and industrial actors outside the Arctic based on the future work of the ArcticHubs project. The value of futures studies lies in opening minds to consider new possibilities and changes in the operating environment and to be prepared and act faster or earlier. In the ArcticHubs project, futures studies have been used together with local and indigenous actors to find out what are the common nominators of desirable futures for Arctic regions and industries. The ability to anticipate provides time to better understand threats and opportunities and to develop more creative strategies.