Eastern Europe is one of the few places that harbor an intact terrestrial carnivore guild, with the Carpathians acting as the stronghold for European carnivores, as there is increased recognition that humans, through direct (e.g., exploitation) and indirect effects (e.g., land use change, forestry, hunting, livestock production, and farming) may have a critical role in shaping trophic relations in animal communities. Images collected from 50 camera trap stations installed in Eastern Carpathians were analyzed the impacts of potentially dominant apex carnivores on the occupancy and detection of a mesocarnivore to understand potential impacts reintroductions of apex predators may have on smaller carnivores. Material was collected and analyzed from terrestrial carnivore species: gray wolf (Canis lupus), Eurasian lynx (Lynx lynx), brown bear (Ursus arctos), wildcat (Felis sylvestris), red fox (Vulpes vulpes), as well as several mustelids: badger (Meles meles), European pine marten (Martes martes), beech marten (Martes foina), stoat (Mustela erminea), and least weasel (Mustela nivalis) ungulates: roe deer (Capreolus capreolus), red deer (Cervus elaphus), wild boar (Sus scrofa) and chamois (Rupicapra rupicapra). We use multispecies occupancy model of two or more interacting species (Rota et al. 2016), structural equation models (SEM) to explore how environmental and anthropogenic variables affect the marginal occupancy (occupancy without accounting for interactions with other species), co-occupancy (overlap in marginal occupancy between species), and conditional occupancy (effects of each species presence on other species detection and occupancy) of lynx, wildcat, and wolf in the Romanian Carpathians.