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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

Integrative Approaches to Enhance Soil Quality and Crop Performance Through Residue Management and Nitrogen Fertilization in Diverse Cropping Rotations

Mirzaei, Morad; Rodrigo-Comino, Jesús; Szabo, Szilard; Radicetti, Emanuele; Li, Yuan; Ahmed, Babangida; Mousavi, Seyed Mohammad Nasir; Serrano Bernardo, Francisco; Caballero-Calvo, Andrés
Journal of soil science and plant nutrition (Springer Nature, 2025)

Foliar and coarse root biomass in three forestry-drained boreal peatlands dominated by Downy birch (Betula pubescens Ehrh.)

Karim, Md Rezaul; Rinne-Garmston, Katja T.; Sarkkola, Sakari
Scandinavian journal of forest research (Taylor & Francis, 2026)

Stand biomass in boreal forests has gained recognition for its crucial role in carbon cycling. While stand biomass is influenced by multiple factors, including stand age, tree species, and site fertility, stand age is often considered the most important factor. Most research has focused on conifer stands, with limited attention to foliage biomass and belowground biomass in peatland sites dominated by deciduous tree species. This study examined foliage and coarse root biomass allocation in three downy birch (Betula pubescens Ehrh.) stands on drained peatland sites in Central Finland. The stands represented three developmental classes: young (10 years), middle-aged (50 years), and mature (80 years). Results showed that foliage biomass ranged from 0.7 t ha−¹ to 6.6 t ha−¹¹, peaking in the middle-aged stand compared to the young and mature stands. Additionally, coarse root biomass in the 0–50 cm peat layer totaled 0.45 t ha−¹, 2.50 t ha−¹, and 1.10 t ha−¹ for the young, middle-aged, and mature stands, respectively, with 77% occurring in the top 20 cm layer. These findings enhance our understanding of biomass allocation patterns, particularly foliage biomass, over time and their impact on litter inputs into the soil.

Challenges in mixed-stock fishery management: The case of the European whitefish in Kvarken, northern Baltic Sea

Lehtonen, Topi K.; Veneranta, Lari; Bitz, Oliver; Fischer, Daniel; Tapio, Miika; Leinonen, Tuomas
Fisheries research (Elsevier, 2026)

Fisheries management units—i.e. ’stocks’—frequently match poorly with biological variation. This mismatch poses a management challenge particularly when within-species units differ in their resilience to harvesting. It is therefore essential to both identify the distinct biological units and adjust fishing pressure accordingly. In the northern Baltic Sea, the European whitefish (Coregonus lavaretus) has two ecotypes, anadromous and sea-spawning, harvested primarily with gillnets. The former is endangered due to river connectivity issues and fishing pressure, while the latter is faring better. However, the key elements of effective management, accurate stock component identification and stock-component-specific fishing pressure adjustment, have not been assessed in this mixed-stock fishery. To address this knowledge gap, we compared ecotype identification methods and examined how fishing depth, season, and gillnet mesh size influence the whitefish catch composition. First, we assessed how well the ecotypes could be identified using phenotypic traits (gill rakers and growth) and genetic data (SNP genotyping). While both approaches were useful, many individuals exhibited intermediate characteristics and were not reliably identified, with phenotypic and genetic identification approaches agreeing only moderately. The prevalence of individuals with intermediate traits may reflect past stocking practices, habitat degradation, or inherently inconsistent homing behaviour. Nevertheless, we caught a higher share of sea-spawner-like individuals from deeper waters, earlier in the season, and with gillnets of smaller mesh size. The fact that it was possible to markedly affect the catch composition suggests that spatial and temporal fishing regulations have potential in the management of whitefish mixed-stock fisheries.

4.1. Example : Finland

Luostarinen, Sari; Laakso, Johanna; Luostarinen, Sari (toim.)
Luonnonvara- ja biotalouden tutkimus : 82/2025 (Luonnonvarakeskus, 2025)

4. Regions of surplus and deficit

Luostarinen, Sari; Lehtonen, Eeva; Tampio, Elina; Laakso, Johanna; Luostarinen, Sari (toim.)
Luonnonvara- ja biotalouden tutkimus : 82/2025 (Luonnonvarakeskus, 2025)