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New mutations provide the raw material for evolution and adaptation. The distribution of fitness effects (DFE) describes the spectrum of effects of new mutations that can occur along a genome, and is, therefore, of vital interest in evolutionary biology. Recent work has uncovered striking similarities in the DFE between closely related species, prompting us to ask whether there is variation in the DFE among populations of the same species, or among species with different degrees of divergence, that is whether there is variation in the DFE at different levels of evolution. Using exome capture data from six tree species sampled across Europe we characterized the DFE for multiple species, and for each species, multiple populations, and investigated the factors potentially influencing the DFE, such as demography, population divergence, and genetic background. We find statistical support for the presence of variation in the DFE at the species level, even among relatively closely related species. However, we find very little difference at the population level, suggesting that differences in the DFE are primarily driven by deep features of species biology, and those evolutionarily recent events, such as demographic changes and local adaptation, have little impact. Nasl. z nasl. zaslona. Opis vira z dne 12. 12. 2023. Število sodelavcev v konzorciju GenTree Consortium: 128. Sodelavca pri raziskavi: M. Bajc. M. Westergen. Bibliografija: str. 15-16. Abstract.

AbstractThe concept of a ‘nexus’ across issues regarding the management of natural resources has gained increasing academic attention in recent years, but there is still relatively limited research on the application of the nexus approach for evaluating policies. This study analyses coherence among the main goals of five policy areas (water, energy, food, land, and climate) in Sweden, drawing upon a desk review, expert assessment, and interaction with stakeholders. The main objective is to enhance understanding of opportunities and challenges posed by such a nexus, understand policy interactions in Sweden, and provide insights into the use of policy coherence analysis as an integral part of resource nexus assessments. The analysis reveals synergies and conflicts between policy goals. For example, Sweden's environmental quality objectives (EQOs) regarding land and all the goals regarding water are either synergistic or neutral. Likewise, climate policy goals are well aligned with the goals regarding energy and ground water quality. On the other hand, the key goal for agriculture, which is food production, is the least coherent with those of the other policy areas. There are conflicts between the EQOs and goals regarding agricultural and forestry production. Stakeholders also indicate that climate goals are treated with higher priority than the goals of other policy areas. Notably, some interactions between policy goals are synergistic or conflicting depending on the context or their interpretation. Implementation of existing goals depends on relevant stakeholders' interests, priorities and interpretations, and on existing prevailing discourses in society, often supported by higher level policies.

Delivering material selected for breeding purposes into the wild in the context of sustainable forest management might reduce the levels of genetic diversity of future forests in comparison to that of natural populations. Another consequence might be a reduction of their resilience under uncertain future climatic and socio-economic conditions if these new populations lack adaptability. Despite the long tradition of breeding activities in Europe, there is still a need to assess the impact of genetically enriched material on forests’ resilience. In this study, we address (1) the genetic diversity of selected material compared to its wild ancestors, and (2) how to enrich breeding material to support forests’ resilience under changing socio-environmental conditions. We analysed 16 study cases of selected material delivered from breeding activities in four European forest tree species (Pinus halepensis Mill., Pinus nigra J.F. Arnold, Pinus pinaster Ait. and Populus nigra L.) with different levels of breeding. To answer these two questions, we first assessed and compared the genetic diversity of selected material versus natural populations using both putatively neutral and adaptive (based on diverging selection) Single Nucleotide Polymorphisms (SNPs). We then suggest how to enrich these populations for resilience under future climatic conditions by defining a core collection for each species including material from populations that will likely disappear under future conditions. Thanks to the large SNP datasets available for our focal species, we were able to detect some trends in our data. Expected and observed heterozygosity values for selected populations were almost always identical. The selected material showed small but significant genetic differentiation from their original population and their inbreeding coefficient was generally lower. However, the level of genetic improvement (i.e. low vs high) was not correlated with the observed genetic differences between selected material and natural populations.The genetic characterization of natural populations distributed across the species range, and the future projection of their range stability, made it possible to identify core-collections that would significantly enrich breeding populations under uncertain future environmental conditions. This work was supported by the European Union’s Horizon 2020 research and innovation programme under grant agreement No 676876-Gentree “Optimizing the management and sustainable use of forest genetic resources in Europe”; the Spanish Ministry of Science [Grant No RTI2018-094691-B-C32]. Peer reviewed 11 Pág.

AbstractTurbulent and radiative energy exchanges between lakes and the atmosphere play an important role in determining the process of lake‐mixing and stratification, including how lakes respond to climate and to climate change. Here we used a one‐dimensional hydrodynamic lake model to assess seasonal impacts of climate change on individual surface heat flux components in Lough Feeagh, Ireland, a deep, monomictic lake. We drove the lake model with an ensemble of outputs from four climate models under three future greenhouse gas scenarios from 1976 to 2099. In these experiments, the results showed significant increases in the radiative budget that were largely counteracted by significant increases in the turbulent fluxes. The combined change in the individual surface heat fluxes led to a change in the total surface heat flux that was small, but sufficient to lead to significant changes in the volume‐weighted average lake temperature. The largest projected changes in total surface heat fluxes were in spring and autumn. Both spring heating and autumnal cooling significantly decreased under future climate conditions, while changes to total surface heat fluxes in winter and summer were an order of magnitude lower. This led to counter‐intuitive results that, in a warming world, there would be less heat not more entering Lough Feeagh during the springtime, and little change in net heating over the summer or winter compared to natural climate conditions, projected increases in the volume‐weighted average lake temperature were found to be largely due to reduced heat loss during autumn.

In AQUACLEW (Advancing the QUAlity of CLimate services for European Water), a project funded by JPI Climate and the ERA-NET Consortium ‘European Research Area for Climate Services (ERA4CS), we examined different ways of improving the usability of existing Climate Services across Europe tackling key aspects in Climate Services improvement: user engagement, lack of resolution, uncertainties, and the need of an evaluation. The rationale of the project is based on an interactive process between service developers and users in seven study cases across Europe assessing the implications of Climate Service’ advancement in users’ decision-making process. A qualitative evaluation assessment allowed us to identify-four pillars when improving the quality of the climate services in the water sector: (1) Robustness, accounting for better quality of the service’ information in certain aspects; (2) Recruitment, understood as a need of involving users more actively in CS structures; (3) Reform, highlighting the possible need for changes in both the service structure and users mindsets; and (4) Reflection, as a process of continuous evaluation of the climate service during its life. European Commission European Commission Joint Research Centre French National Research Agency (ANR) Swedish Research Council Formas German Aerospace Centre (DLR) Helmholtz Association Spanish Government IFD 690462 BMWFW

Cities are experiencing unprecedented climate impacts related to increasing temperatures, which vary within a city due to the heterogenous nature of urban environments. Adapting urban areas to heat requires efforts on multiple levels from urban governance, spatial planning and design to adapting everyday activities. This paper presents the prototype of a pedestrian routing tool to support citizens in navigating urban heat, and the results of tests and interviews with 24 practitioners and experts in Portugal and Sweden. The study aims to assess how and to what extent a navigation tool on urban heat could support urban climate risk management, and to evaluate the potential of the tool to support everyday adaptation and increase citizen engagement. We explore what functionality and additional information would be required to make the tool useful and relevant for different user groups. Results indicate that (i) climate services that fit in your pocket increase access to climate information and have potential to guide everyday adaptation practices; and (ii) applications need to be contextualized and tailored to match the needs and decision contexts of the user through integration of relevant information or tools.

The study set out to investigate how the experience of creating a map-based participatory system might help identify what is needed to support the production of relevant volunteered geographic information (VGI) about urban areas exposed to impacts of adverse weather events in Trondheim, Norway. This article details the systematic approach used to collect VGI, starting from the active engagement of end users during the design and development process of the CitizenSensing participatory system, through using the system in two VGI campaigns, up to the examination of the collected data. Although the VGI examination identified exposed areas in Trondheim, for instance, those that are likely to accumulate surface water from heavy rains or meltwater, the experience gained from the use of the CitizenSensing system helped to identify some critical points regarding the production of relevant VGI. Potential practical implications justify the need for VGI. For instance, in the case of Trondheim, relevant VGI may result in better planned municipal interventions regarding city infrastructure for pedestrians, cyclists and drivers, increased public awareness and access to local knowledge about areas exposed to inundation. The study also confirmed the need for adequate system components for VGI vetting and exploration in the post-collection stage to obtain a comprehensive insight into collected VGI. Funding: project Citizen Sensing-Urban Climate Resilience through Participatory Risk Management Systems, ERA4CS, an ERA-NET by JPIClimate; FCT (Portugal) [ERA4CS/0001/2016]; FORMAS (Sweden) [2017-01719]; NWO (The Netherlands) [438.17.805]; RCN (Norway) [274192, 321002]; European Union [690462] Citzensensing