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Reef environments are characterized as any formation with a hard substrate of organic and/or inorganic origin. In rocky shores, abiotic and biotic features determine its biodiversity. At Forno beach, where upwelling phenomenon occurs, the reef fish assemblage was identified by underwater visual census. The benthic coverage was classified in four categories. Substrate preference was determined by the relative abundance of each species on each of the substrate. A total of 5414 individuals of 31 reef fish species were observed. The results demonstrated that the habitat preference, characterized by benthic coverage, was important for the composition of reef fish assemblage on a micro-scale. The choice for a habitat among benthic coverage types could be mainly explained by availability of food resources., Os ambientes recifais são caracterizados como formações de fundo consolidado de origem orgânica e/ou inorgânica. Em costões rochosos, fatores bióticos e abióticos determinam a sua biodiversidade. Na praia do Forno, onde o fenômeno da ressurgência ocorre, a assembleia de peixes recifais foi analisada por meio de censo visual. A cobertura bentônica do substrato foi classificada em quatro categorias. O uso do substrato foi determinado pela abundância relativa das espécies em cada um de seus tipos. Um total de 5414 indivíduos pertencentes a 31 espécies de peixes recifais foi observado. Os resultados demonstraram que a preferência por habitats, caracterizados pela cobertura por organismos bentônicos, foi um fator importante na determinação da composição da assembleia de peixes recifais, em uma microescala. A escolha de um habitat dentre os diversos tipos de substrato, poder ser em sua maior parte explicada pela disponibilidade de recursos alimentares.Palavras chave: Cobertura bentônica, padrões biogeográficos, interações bióticas, habitat, ictiofauna, costões rochosos.

Mapping the distribution of invasive species under current and future climate conditions is crucial to implement sustainable and effective conservation strategies. Several studies showed how invasive species may benefit from climate change fostering their invasion rate and, consequently, affecting the native species community. In the Canary Islands and on Tenerife in particular, previous research mostly focused on climate change impacts on the native communities, whereas less attention has been paid on alien species distribution under climate change scenarios. In this study, we modelled the habitat distribution of Pennisetum setaceum, one of the most invasive alien species on Tenerife. In addition, we described the species’ potential distribution shift in the light of two climate change scenarios (RCP2.6, RCP8.5), highlighting the areas that should be prioritized during management and eradication programs. P. setaceum’s suitable areas are located in the coastal area, with higher habitat suitability near cities and below 800 m asl. In both future climate change scenarios, the geographic distribution of P. setaceum suitable areas is characterized by an elevational shift, which is more pronounced in the RCP8.5 scenario. Despite being drought resistant, water supply is crucial for the species’ seed germination, thus supporting future species’ shift to higher elevation and in the north–north–west part of the island, where it could benefit from the combined effect of orographic precipitations and humidity carried by trade winds.