Bioconstructors, known to have a key structural and functional role in marine ecosystems, provide complex three-dimensional structures that sustain rich assemblages and high biodiversity levels. However, they are especially vulnerable to the effects of global change, including ocean warming and acidification. The coralline algae Ellisolandia elongata was selected to study the responses of its associated fauna to ‘future ocean’ conditions, as predicted for the year 2100 (RCP8.5 scenario), by simulating 4 different experimental conditions in the lab (control, altered temperature, altered pH, and altered temperature and pH). These responses were analysed at macrogroup level and with a focus on peracarids. Results showed no significant influence of the treatments on the general community structure, but clear group-specific responses regarding densities of some molluscs, nematodes and nemertans. Despite no apparent effect on the peracarid density as a macrogroup, significant differences on the community structure were observed given by species-specific responses. Ellisolandia elongata turfs have proven to host a wide variety of species, including some rare Mediterranean natives as well as widespread aliens. Although ocean acidification does not significantly impact the associated community structure under current temperature conditions, increased temperatures exacerbate the effects of acidification, with evident shifts in the community
Managing Thesis and Internship Exchanges
