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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Aerobic scope is sustained through a heatwave in juvenile Atlantic salmon (Salmo salar)

Cotgrove, Lucy; Morozov, Sergey; Raitakivi, Miika; Sala, Evan; Prokkola, Jenni M.
Journal of fish biology (John Wiley & Sons, 2026)

Aquatic ectotherms are vulnerable to heatwave-induced physiological stress, which arises from increased energy demands and reduced dissolved oxygen content in warmer waters. Understanding thermal physiology is critical for predicting how commercially and ecologically important populations could be affected by the increasing risk of rising temperatures. Heatwave risk assessments often examine extremities of time scales: immediate impacts or long-term consequences. However, little is known about how consistently increasing mid-term thermal stress shapes aerobic performance in commercially important species such as Atlantic salmon (Salmo salar), which may face heat stress in rivers, especially at juvenile life stages. By measuring how salmon juveniles manage their aerobic capacity at 16, 19 and 22°C using intermittent flow respirometry, we test if their thermal performance curve declines at temperatures commonly occurring during heatwaves. Whole-animal metabolism was measured from control individuals kept at 16°C before and after the heatwave, and after 4–5 days exposure at 19 and 22°C during the heatwave. We show standard metabolic rate increases with temperature, but maximum metabolic rate and aerobic scope do not change between these temperatures. These findings suggest that juvenile Atlantic salmon may have limited capacity to increase aerobic performance during moderate heatwaves, leaving them vulnerable to cumulative effects of oxygen limitation to vital functions such as growth and stress responses. As climate change intensifies, incorporating thermal performance curves into conservation strategies can be used for predicting population resilience and informing effective management.

Vesitalouden hallinta maatalousvaltaisilla valuma-alueilla (VESIMA) : Loppuraportti 2025

Häggblom, Olle; Ijäs, Julia; Manninen, Noora; Mäkelä, Minna; Nurminen, Jyrki; Rieskaniemi, Anna; Suchi, Sadia; Keskinen, Saana; Koivusalo, Harri; Lindgren, Ville; Västilä, Kaisa; Myllys, Merja; Laine-Kaulio, Hanne
Salaojituksen tutkimusyhdistys ry:n tiedote : 38 (Salaojituksen tutkimusyhdistys, 2025)

Vähähiilisen rakentamisen lainsäädännön vaikutus puurakentamiseen

Westerholm, Ninni; Vares, Sirje; Tuure, Antti; Kuittinen, Matti; Karjalainen, Markku
Metsäbiotalouden tiedepaneelin raportti : 1/2026 (Metsäbiotalouden tiedepaneeli, 2026)

Absorptive roots outweigh transport roots in modulating nitrogen-addition effects on soil organic carbon accumulation in a subtropical forest

Yuan, Yuanshuang; Du, Xianwang; Yin, Yicong; Adamczyk, Bartosz; Zhang, Ziliang
Geoderma (Elsevier, 2026)

Root carbon (C) inputs play a pivotal role in mediating the formation, accumulation, and turnover of soil organic C (SOC). However, how different root functional modules (absorptive roots [ARs] vs. transport roots [TRs]) regulate SOC dynamics under elevated atmospheric nitrogen (N) deposition remains unclear. By separately collecting rhizosphere soils of ARs and TRs and quantifying SOC accumulation therein, we characterized the distinct roles of these two root modules in regulating SOC dynamics in a subtropical karst forest subjected to different rates of N additions. Nitrogen addition promoted SOC accumulation in the rhizosphere of both ARs and TRs, especially at higher N-addition rate. Moreover, the rhizosphere SOC contents of ARs were significantly higher than those of TRs across N-addition treatments. Correlation analysis indicated that under the influence of ARs, SOC content was significantly and positively correlated with both protective mineral-associated SOC poos and microbial carbon pump (MCP) efficacy. By contrast, in the context of TRs, a significantly positive association was observed exclusively between SOC content and protective mineral pools, with no significant correlation of SOC content with MCP efficacy. These findings suggest that ARs outweigh TRs in mediating the effects of N addition on SOC accumulation. Mechanisms driving N-induced SOC accumulation may differ between two root functional modules, with each module governing distinct regulatory pathways. This study highlights the necessity to integrate root functional traits, particularly those distinguishing ARs and TRs, into process-based predictive frameworks of ecosystem C cycling. Such integration is critical for improving the mechanistic understanding and predictive accuracy of soil C dynamics in the context of projected N deposition regimes.

Lypsylehmien tilakuolleisuus huolenaiheena

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