TY - GEN A1 - Kelly, Julia A1 - Doerr, Stefan H. A1 - Ekroos, Johan A1 - Ibáñez, Theresa S. A1 - Islam, Md. Rafikul A1 - Santín, Cristina A1 - Soares, Margarida A1 - Kljun, Natascha T1 - No recovery of soil respiration four years after fire and post-fire management in a Nordic boreal forest T2 - Agricultural and forest meteorology N2 - The long-term carbon storage capacity of the boreal forest is under threat from the increasing frequency and intensity of wildfires. In addition to the direct carbon emissions during a fire, the burnt forest often turns into a net carbon emitter after fire, leading to large additional losses of carbon over several years. Understanding how quickly forests recover after a fire is therefore vital to predicting the effects of fire on the forest carbon balance. We present soil respiration and CH4 fluxes, soil chemistry, microclimate and vegetation survey data from the first four years after a wildfire in a Pinus sylvestris forest in Sweden. This is an understudied part of the boreal biome where forest management decisions interact with disturbances to affect forest growth. We analysed how fire severity and post-fire salvage-logging affected soil carbon fluxes. The fire did not affect soil CH4 uptake. However, soil respiration was significantly affected by the presence or absence of living trees after the fire and post-fire forest management. Tree mortality due to the high-severity fire, or the salvage-logging of living trees after low-severity fire, led to immediate and significant decreases in soil respiration. Salvage-logging of dead trees after high-severity fire did not alter soil respiration compared to when the dead trees were left standing. However, it did significantly slow the regrowth of understory vegetation. Our results highlight that the impact of salvage-logging on the soil carbon fluxes depends on fire severity but that logging always slows the natural recovery of vegetation after fire. The soil CO2 fluxes did not show signs of recovery at any of the burnt sites during the first four years since the fire. KW - Soil respiration KW - Wildfire KW - Recovery KW - Salvage-logging KW - Boreal forest KW - Methane flux Y1 - 2025 U6 - https://doi.org/10.1016/j.agrformet.2025.110454 SN - 0168-1923 VL - 364 SP - 1 EP - 14 PB - Elsevier BV CY - Amsterdam ER - TY - GEN A1 - Birkhofer, Klaus A1 - Ekroos, Johan A1 - Mader, Viktoria A1 - Tschumi, Matthias A1 - Wu, Ai-ping A1 - Smith, Henrik G. T1 - Taxonomy, habitat and conservation status explain the diet composition of insectivorous birds in Europe T2 - Biological conservation N2 - Populations of European birds and insects are declining, with consequences for trophic interactions. Insectivorous birds are particularly vulnerable to losses of arthropods, yet the factors shaping their diet composition remain insufficiently understood. We conducted a quantitative review of the arthropod diets of 94 European insectivorous bird species and assessed how diet richness and composition relate to taxonomy, developmental stage, climate, conservation status, habitat, migration status, sampling intensity, and methodological approach. Taxonomy, habitat and conservation status (both population trend over time and current status) were the primary predictors of diet richness and composition. Species of population concern in Europe relied more on Coleoptera and Orthoptera prey, while species with declining population trends and species in agricultural, artificial and semi-natural habitats showed strong dependence on Coleoptera prey. Species in forests and of global population concern had a higher percentage of Arachnida prey, while birds in inland water habitats relied on Diptera prey. Anthropogenic activities such as the use of insecticides and changes in land use in agricultural and forest habitats negatively impact the abundance and diversity of arthropods, including Coleoptera and Arachnida. These declines will cascade up the food chain, ultimately diminishing both common and threatened bird species by limiting their prey. Species of global conservation concern may be particularly at risk, as they exhibit the lowest prey taxonomic richness. It is therefore crucial that future legislation and policy interventions consider these indirect impacts on bird diets, as these vulnerable species are at high risk of further losses in arthropod prey. KW - Foraging KW - Arthropod KW - Biodiversity loss KW - Prey KW - Insect Y1 - 2025 U6 - https://doi.org/10.1016/j.biocon.2025.111566 SN - 0006-3207 VL - 313 SP - 1 EP - 11 PB - Elsevier BV CY - Amsterdam ER -