This storage project will be used for analyses of eDNA metabarcoding data in the two projects: 1. Marine biodiversity associated with kelp forests at the Swedish West coast 2. The effect of small-scale marine aquaculture on marine biodiversity. During the past five years we have been developing metabarcoding and eDNA methods to monitor marine biodiversity. Now we will apply these methods to estimate the effects of kelp forests and small-scale marine aquacultures on marine biodiversity. The macroalgae (kelps) are known to provide habitats to many benthic invertebrates and fish species but so far studies on their effect on biodiversity have been limited to particular group of organisms or species. We will use the power of eDNA to describe the whole species communities associated with the kelp forests and in areas outside. Small-scale marine aquacultures, such as marine community gardens ("marina kolonilotter") are suggested to have positive effects through uptake of nutrients, reducing particles in the waters and providing substrate for other species. However, there is no quantitative studies of this effect. We will use eDNA to investigate the impact of small-smale marine aquaculture on biodiversity as part of EU HORIZON project investigating the potential for small-scale aquaculture in Nordic countries.