Aim: to analyse temporal metacommunity dynamics in river networks in relation to hydrological conditions and dispersal. Location: 15 river reaches from the Llobregat, Besòs and Foix catchments in the
Nuuk basis monitoring of macroalgae and fauna â population dynamics of knotted wrack (Ascophyllum nodosum). Ascophyllum nodosum segment biomass. The dataset consist of annual (2012-2021) sampling of