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Global agricultural systems are increasingly moving towards organic farming to satisfy consumers’ increased environmental awareness. Yet, shortage of fertilizers and more frequent water stresses are challenging agricultural systems to minimize their environmental impact without compromising productivity and economic sustainability. This study discusses how greenhouse organic tomato production behaves when multiple eco-sustainable solutions are applied. In particular, organic tomato cultivation was supported by a specific biostimulant treatment that included a microbial solution, based on Rhizobium, which was distributed onto faba bean seeds; once a suitable fava bean biomass had been obtained, the plants were chopped and incorporated into the soil in order to release nitrogen. In the trials considered, microbial solutions reduced organic tomato production costs by 5 %. Considering that fertilization accounted for up to 7 % of total production costs, a large-scale preparation of the microbial solution could trigger significant economic savings. The Life-Cycle Assessment shows that organic tomatoes, with a lower yield, have a lower environmental impact than conventional production only for 7 of the 15 evaluated impact categories. Combined agro-technical growing solutions are economically viable in the presence of yields in organic compared to conventional, and their environmental impact is attractive in both scenarios.

International audience; The Arctic region is threatened by contamination deriving from both long-range pollution and local human activities. Polycyclic Aromatic Hydrocarbons (PAHs) are environmental tracers of emission, transport and deposition processes. A first campaign has been conducted at Ny-Ålesund, Svalbard, from October 2018 to May 2019, monitoring weekly concentrations of PAHs in Arctic surface snow. The trend of the 16 high priority PAH compounds showed that long-range inputs occurred mainly in the winter, with concentrations ranging from 0.8 ng L-1 to 37 ng L-1. In contrast to this, the most abundant analyte retene, showed an opposite seasonal trend with highest values in autumn and late spring (up to 97 ng L-1), while in winter this compound remained below 3 ng L-1. This is most likely due to local contributions from outcropping coal deposits and stockpiles. Our results show a general agreement with the atmospheric signal, although significant skews can be attributed to postdepositional processes, wind erosion, melting episodes and redistribution. ☆ This paper has been recommended for acceptance by Eddy Y. Zeng.

Effective monitoring of non-indigenous seaweeds and combatting their effects relies on a solid confirmation of the non-indigenous status of the respective species. We critically analysed the status of presumed non-indigenous seaweed species reported from the Mediterranean Sea, the Northeast Atlantic Ocean and Macaronesia, resulting in a list of 140 species whose non-indigenous nature is undisputed. For an additional 87 species it is unclear if they are native or non-indigenous (cryptogenic species) or their identity requires confirmation (data deficient species). We discuss the factors underlying both taxonomic and biogeographic uncertainties and outline recommendations to reduce uncertainty about the non-indigenous status of seaweeds. Our dataset consisted of over 19,000 distribution records, half of which can be attributed to only five species (Sargassum muticum, Bonnemaisonia hamifera, Asparagopsis armata, Caulerpa cylindracea and Colpomenia peregrina), while 56 species (40%) are recorded no more than once or twice. In addition, our analyses revealed considerable variation in the diversity of non-indigenous species between the geographic regions. The Eastern Mediterranean Sea is home to the largest fraction of non-indigenous seaweed species, the majority of which have a Red Sea or Indo-Pacific origin and have entered the Mediterranean Sea mostly via the Suez Canal. Non-indigenous seaweeds with native ranges situated in the Northwest Pacific make up a large fraction of the total in the Western Mediterranean Sea, Lusitania and Northern Europe, followed by non-indigenous species with a presumed Australasian origin. Uncertainty remains, however, regarding the native range of a substantial fraction of non-indigenous seaweeds in the study area. In so far as analyses of first detections can serve as a proxy for the introduction rate of non-indigenous seaweeds, these do not reveal a decrease in the introduction rate, indicating that the current measures and policies are insufficient to battle the introduction and spread of non-indigenous species in the study area. European Marine Biological Resource Centre Belgium [GOH3817N]; European Marine Biological Resource Centre Belgium [I001621N]; Fonds Wetenschappelijk Onderzoek [3F020119]; POR PUGLIA FESR-FSE 2014/2020 [Asse VI, Action 6.5]; RESTORESEAS [EU-BiodivERsA BiodivRestore-253]; Institut des Sciences de l’Évolution – Montpellier [ISEM 2023-173]; Italian National Recovery and Resilience Plan [Mission 4, Component 2, ‘From research to business’: 1. NBFC, Investment 1.4, Project CN00000033]; IDEALG [ANR-10-BTBR-04; Institut des Sciences de l’Évolution – Montpellier Institut des Sciences de l’Évolution – Montpellier [ISEM 2023-173]. info:eu-repo/semantics/publishedVersion

Shortening food supply chains attracts increasing support from policymakers, to improve returns to farmers and stimulate rural development. However, there is a lack of empirical evidence regarding the impacts of short food supply chains on local economies. To address this, the article quantifies the impacts of short food supply chains on local economies, using the Keynesian-based Local Multiplier 3 method (LM3), applied to a unique dataset of 122 farm businesses from five European Union countries (France, Hungary, Italy, Poland and the United Kingdom). Estimations cover 305 market chains, comprising both short and long food supply chains, in which sampled farmers participate. The results indicate that the revenues from farm production remain largely within local economies, generating a substantial multiplier effect (LM3 > 2). This effect stems from purchases of farm inputs locally including, in the first instance, hiring local labour, as well as the expenditures of local suppliers that re-spend part of their revenues within the local area. The multiplier effects of short food supply chains are similar to long food supply chain equivalents as both use largely local labour and source tradable inputs locally. In shaping food chain policy a broader set of socioeconomic benefits to local development from selling through short food supply chains should be considered. International audience

Globalization of food chains and scale increases in business models are dramatically affecting rural areas in Europe, by a simplification of land use, new urban-rural relations and reshaped social networks. While pressures on land use systems have been increasing due to the competition on commodity markets, the role of territorially embedded production systems remains crucial in keeping farm biodiversity and unique cultural landscapes, as well as social and cultural ties. Building on the social-ecological resilience approach (Darnhofer (2020b), this paper examines the resilience of territorially embedded production systems in different regions of Europe, including emergent and ongoing patterns of material, social and cultural relations. It shows how primary producers improve the resilience of their production systems in response to increasing pressures resulting from changing ecological, economic, social and cultural conditions. Three production systems are examined: carp farming in Middle Franconia, Germany; wine production in Tuscany, Italy; and olive oil production in Alentejo, Portugal. The paper adopts an adapted relational approach to conceptualise how resilience develops in terms of the ability of producers and their networks to develop new markets, reduce costs and add value. Different types of enacted relations (sets of mutually empowering connections in space and time) are identified, including relations among family members, between farmers, along the commodity chain and with other stakeholders, such as tourism, policy and regional administrations. Using these insights, the paper argues that it is important to shift the focus of agricultural resilience from the producer level to the network level, particularly how network dynamics emerge as relations enacted by diverse actors. These collaborative efforts have the potential to enable primary producers to maintain cultural landscapes, preserve their ecosystems and ensure the farms’ economic survival and by extension help to maintain the socio-ecological resilience of territorial production systems.

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.