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Biotic interactions and habitat drive positive co‐occurrence between facilitating and beneficiary stream fishes

The role of biotic interactions in determining species distributions is difficult to decouple from abiotic factors. Most research to date has focused on negative biotic interactions, but the importance of positive interactions such as mutualism and facilitation at large scales is less understood. We used a two‐species occupancy modelling approach to decouple the relative effects of abiotic factors and biotic interactions between a habitat‐modifying North American stream fish (Nocomis leptocephalus) and two of its nearly‐obligate beneficiary species (Chrosomus oreas and Clinostomus funduloides).