Keywords: Alkalinity, total; Aragonite saturation state; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using CO2SYS; Carbonate ion; Carbon dioxide; Chlorophyll a; Chlorophyll b; Chlorophyta; Coast and continental shelf; Date; Dry mass; Growth/Morphology; Growth rate; Identification; Incubation duration; Laboratory experiment; Macroalgae; Maximal electron transport rate, relative; Maximum photochemical quantum yield of photosystem II; Net photosynthesis rate, oxygen; Net photosynthesis rate, oxygen, per chlorophyll a; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Plantae; Potentiometric; Potentiometric titration; Primary production/Photosynthesis; Replicate; Salinity; Single species; Species; Temperate; Temperature, water; Treatment; Ulva lactuca

Keywords: AWI_Coast; BIOACID; Biological Impacts of Ocean Acidification; Coastal Ecology @ AWI; German Bight, North Sea; Helgoland; Meeresstation Helgoland; MULT; Multiple investigations; off_Helgoland

Keywords: Abludomelita obtusata; Abludomelita obtusata, standard deviation; Actiniaria; Actiniaria, standard deviation; Aonides paucibranchiata; Aonides paucibranchiata, standard deviation; Atylus swammerdamei; Atylus swammerdamei, standard deviation; Bathyporeia elegans; Bathyporeia elegans, standard deviation; Bathyporeia guilliamsoniana; Bathyporeia guilliamsoniana, standard deviation; Chaetozone cf. setosa; Chaetozone cf. setosa, standard deviation; Counting; DEPTH, sediment/rock; Distance; Echinocardium cordatum; Echinocardium cordatum, standard deviation; Eunereis longissima; Eunereis longissima, standard deviation; FINO1; Lanice conchilega; Lanice conchilega, standard deviation; Magelona filiformis; Magelona filiformis, standard deviation; Magelona johnstoni; Magelona johnstoni, standard deviation; Maximum; Minimum; Monitoring station; MONS; Montacuta ferruginosa; Montacuta ferruginosa, standard deviation; Nemertea; Nemertini, standard deviation; Nephtys cirrosa; Nephtys cirrosa, standard deviation; North Sea; Notomastus latericeus; Notomastus latericeus, standard deviation; Owenia fusiformis; Owenia fusiformis, standard deviation; Phoronis spp.; Phoronis spp., standard deviation; Poecilochaetus serpens; Poecilochaetus serpens, standard deviation; Portunidae; Portunidae, standard deviation; Presence; Scoloplos armiger; Scoloplos armiger, standard deviation; Spiophanes bombyx; Spiophanes bombyx, standard deviation; Spio spp.; Spio spp., standard deviation; Tellina fabula; Tellina fabula, standard deviation; Thracia papyracea; Thracia papyracea, standard deviation; Urothoe poseidonis; Urothoe poseidonis, standard deviation