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

Lypsylehmien tilakuolleisuus huolenaiheena

Leino, Maria; Niskanen, Olli
KM vet : 6 (Terramedia oy, 2025)

Lehmien jalostus on tietoa ja tiedettä

Leino, Maria
Ilkka-Pohjalainen : 11.8.2025 (I-Mediat oy, 2025)

Exploring the subjective and objective characteristics affecting the frequency of human-nature interactions in urban green spaces: a case study from Finland

Poturalska, Anita; Ala-Hulkko, Terhi; Artell, Janne; Juutinen, Artti; Kangas, Katja
Urban ecosystems : 1 (Springer Nature, 2026)

Green urban and peri-urban spaces are important sites for human-nature interactions, providing countless ecosystem services to support the wellbeing of urban populations. In an era of rapid urbanization, understanding human-nature interactions requires considering both subjective, user-specific perspectives and the objective measures of environmental and infrastructural features of these green spaces. In this case study we explore how different groups of characteristics impact the number of visits and, consequently, human-nature interactions frequency in urban and peri-urban spaces across three Finnish cities: Espoo, Kuopio, and Jyväskylä. We used Public Participatory Geographic Information Systems survey data of which respondents marked the green urban and peri-urban spaces they visit annually. A panel generalized linear modelling approach was used to analyze the roles of four groups of subjective and objective characteristics on the visit frequency, including: the socio-demographic background of survey respondents; the cultural ecosystem services they consume; the perceived accessibility characteristics of the marked locations; and the presence of objectively measured environmental and infrastructure features of these locations. Our findings underline the importance of perceived accessibility and availability of infrastructure for more frequent interactions with nature. Additionally, they emphasize the need of urban residents for access to biodiverse green spaces within closer proximity to their homes. Ensuring the availability of green spaces and preserving their ability to provide ecosystem services is essential for maintaining the well-being of urban populations now and in the future.

Species distribution modeling with expert elicitation and Bayesian calibration

Kaurila, Karel; Kuningas, Sanna; Lappalainen, Antti; Vanhatalo, Jarno
Ecography (Wiley-Blackwell, 2026)

Species distribution models (SDM) are key tools in ecology, conservation, and natural resources management. They are traditionally trained with data on direct species observations. However, if collecting species data is difficult or expensive, complementary information sources on species distributions are needed. Expert knowledge has been demonstrated to improve SDM predictions in a number of such applications but there is still no consensus on methods to integrate information from several experts into a single coherent species distribution prediction. Moreover, since expert assessments are inherently subjective and prone to biases, expert-driven SDMs should calibrate their assessments. We propose a method to tackle these challenges by extending the hierarchical Bayesian integrated species distribution modeling framework to expert informed species distribution modeling. We treated map-like expert assessments as data and integrated them with calibration data on species recordings. Our integrated SDM has model components to estimate experts' reliability and to adjust for potential biases in their assessments. After integrated inference, we used the model to make predictions over a study area. We tested our approach with an extensive simulation study and a real world case study comprising ten expert assessments and survey data on pikeperch larvae from a coastal area of the Gulf of Finland. Expert assessments significantly improved species distribution predictions compared to predictions conditioned on survey data only. They also improved parameter inference, thus strengthening the ecological interpretation of the results. The skill of the experts, and biases in their assessments, varied considerably in the case study though, emphasizing the importance of formal expert calibration provided by our model. Our results show that expert elicitation can be an efficient tool for improving species distribution model predictions. Our approach is especially useful for applications where any type of species data are expensive to collect but local species experts can easily be reached.

Moisture dynamics during Coniophora puteana brown rot degradation of Scots pine sapwood

Belt, Tiina; Treu, Andreas; Möttönen, Veikko; Altgen, Michael
International biodeterioration and biodegradation (Elsevier, 2026)

Wood has many attractive material qualities, but it is susceptible to biological degradation by wood-decaying fungi. Moisture is one of the critical requirements for wood decay, but much remains unknown about moisture dynamics in decaying wood. To fill this knowledge gap, this study investigated moisture in Scots pine sapwood during decay caused by the brown rot fungus Coniophora puteana. Samples were exposed to decay in two time-series experiments; mass loss and moisture content were recorded over the course of decay, and the bound and free water populations in the samples were analysed using low-field nuclear magnetic resonance (LFNMR) relaxometry in both the decaying state and at full water saturation. Selected samples were also used for water vapour sorption measurements. The time-series decay tests showed that moisture content initially increased due to fungal activity but decreased over time when corrected for mass loss, contrary to the general belief that moisture content increases with decay. LFNMR revealed that bound water content increased on a decayed-mass basis in the decaying state and at saturation, but no increase was seen after correction for mass loss. Free water content followed gravimetric moisture content in the decaying state, but the saturated state measurements revealed an initial increase and subsequent decrease with mass loss. Degradation caused changes in hygroscopicity, but our data show that overall moisture content is regulated by fungal activity rather than by material properties. These findings highlight the complexity of water interactions during fungal degradation, offering valuable new insights into wood degradation mechanisms.