20.500.12556/RUL-170993 Trophic interactions are key to understanding the effects of global change on the distribution and functional role of the brown bear Biotic interactions are expected to influence species' responses to global changes, but they are rarely considered across broad spatial extents. Abiotic factors are thought to operate at larger spatial scales, while biotic factors, such as species interactions, are considered more important at local scales within communities, in part because of the knowledge gap on species interactions at large spatial scales (i.e., the Eltonian shortfall). We assessed, at a continental scale, (i) the importance of biotic interactions, through food webs, on species distributions, and (ii) how biotic interactions under scenarios of climate and land-use change may affect the distribution of the brown bear (Ursus arctos). We built a highly detailed, spatially dynamic, and empirically sampled food web based on the energy contribution of 276 brown bear food species from different taxa (plants, vertebrates, and invertebrates) and their ensemble habitat models at high resolution across Europe. Then, combining energy contribution and predicted habitat of food species, we modelled energy contribution across space and included these layers within Bayesian-based models of the brown bear distribution in Europe. The inclusion of biotic interactions considerably improved our understanding of brown bear distribution at large (continental) scales compared with Bayesian models including only abiotic factors (climate and land use). Predicted future range shifts, which included changes in the distribution of food species, varied greatly when considering various scenarios of change in biotic factors, providing a warning that future indirect climate and land-use change are likely to have strong but highly uncertain impacts on species biogeography. Our study confirmed that advancing our understanding of ecological networks of species interactions will improve future projections of biodiversity change, especially for modelling species distributions and their functional role under climate and land-use change scenarios, which is key for effective conservation of biodiversity and ecosystem services. climate change community ecosystem food web habitat human impact land use predator–prey species distribution mode Ursus arctos podnebne spremembe združbe ekosistem prehranjevalni splet življenjsko okolje vpliv človeka raba zemljišč plenilec–plen model razširjenosti vrst rjavi medved true false true Angleški jezik Slovenski jezik Članek v reviji 2025-07-25 13:22:53 2025-07-25 13:23:00 2025-07-26 04:17:56 0000-00-00 00:00:00 2025 0 0 V članku je navedenih še več virov financiranja. 20 str. iss. 6, article no. e70252 Vol. 31 Jun. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 574.4:599.744.211 1365-2486 10.1111/gcb.70252 243165443 RAZ_Lucas_Pablo_M._2025.pdf RAZ_Lucas_Pablo_M._2025.pdf 1 744945B3CCFA031C358C0FEB59A7EEAC 5bd476271e3ad93ca490fc0213c9f1a11ed7e0d48a2ff1fa5d98a1ea26414dde 2f283a37-694c-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=213321 https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcb.70252 1 b4acf8db-6949-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=213315 Biotehniška fakulteta 0 0 0