The effect of in situ shading on a Posidonia oceanica meadow situated within a fish farm induced moderately nutrient enriched environment

► No evident signs of regression have been identified on a meadow scale. ► Data loggers recorded significant daily fluctuation of temperature at the sea bottom. ► OM content in coarse sediment originates from P. oceanica litter and fish farm. ► Light availability principally controls seagrass distribution within the fish farm location.