Abstract
Magnetic fields generated by submarine cables and marine renewable energy devices may negatively affect organisms living nearby. At the same time, the number of projects related to the strategic integration of low-trophic aquaculture within offshore wind farms is increasing. As there is a complete lack of information on the effects of magnetic fields on macroalgae, in our study, we investigated the effects of an electromagnetic field (EMF; 50 Hz, 1 mT) on the basic indicators of macroalgal functioning in two Baltic species of commercial value, Fucus vesiculosus and Furcellaria lumbricalis. EMF had a limited effect on the growth of both species. No changes were observed in nutrient uptake rates, water content, or organic matter content. lumbricalis. EMF had a limited effect on the growth of