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: Acrochaetium secundatum; Alcyonidium mytili; Anoplodactylus petiolatus; Antithamnion sp.; Apherusa bispinosa; Aplidium glabrum; Aplysia fasciata; Apohyale prevostii; Ascophyllum nodosum; Asterias rubens; Austrominius modestus; Autolytus sp.; Balanus crenatus; Belone belone; Berkeleya rutilans; Bivalvia indeterminata, juvenile; Bowerbankia gracilis; Bowerbankia imbricata; Bowerbankia sp.; Bryopsis sp.; Cancer pagurus; Capitella sp.; Caprella linearis; Caprella mutica; Caprella sp.; Carcinus maenas; Ceramium nodulosum; Ceramium rubrum; Ceramium sp.; Cerastoderma edule; Cerastoderma sp.; Chaetomorpha sp.; Chaetomorpha tortuosa; Cheirocratus sp.; Chondrus crispus; Clytia hemisphaerica; Colpomenia sinuosa; Conopeum reticulum; Coryne muscoides; Crassostrea gigas; Crepidula fornicata; Cumacea indeterminata; Cyclopterus lumpus; Date/Time of event; Ectocarpales; Ectocarpus spp.; Elachista fucicola; Electra pilosa; Enteromorpha spp.; Eriocheir sinensis; Erythrotrichia reflexa; Erythrotrichia sp.; Eubranchus exiguus; Event label; Fucus vesiculosus; Fves_bent_1; Fves_bent_10; Fves_bent_11; Fves_bent_12; Fves_bent_13; Fves_bent_2; Fves_bent_3; Fves_bent_4; Fves_bent_5; Fves_bent_6; Fves_bent_7; Fves_bent_8; Fves_bent_9; Fves_float_1; Fves_float_10; Fves_float_11; Fves_float_12; Fves_float_13; Fves_float_14; Fves_float_15; Fves_float_2; Fves_float_3; Fves_float_4; Fves_float_5; Fves_float_6; Fves_float_7; Fves_float_8; Fves_float_9; Gammarus locusta; Gasterosteus aculeatus; Giffordia granulosa; Gitana sarsi; Goniotrichum alsidii; Gracilaria vermiculophylla; Halichondria panicea; Harmothoe imbricata; Hemigrapsus sanguineus; Himanthalia elongata; Hydrobia ulvae; Hydrozoa indeterminata; Idotea baltica; Idotea chelipes; Idotea emarginata; Idotea granulosa; Idotea linearis; Idotea metallica; Idotea neglecta; Idotea pelagica; Idotea sp.; Jaera albifrons; Janiridae indeterminata; Jassa marmorata; Laomedea angulata; Latitude of event; Lepidonotus squamatus; Leucosolenia sp.; Liocarcinus holsatus; Littorina fabalis; Littorina littorea; Littorina obtusata; Longitude of event; Macoma baltica; Membranipora membranacea; Metopa pusilla; Metridium senile; Microprotopus maculatus; Molgula manhattensis; Monocorophium acherusicum; Mya arenaria; Mytilus edulis; Nemertea indeterminata; Nereis diversicolor; Nereis sp.; Nudibranch eggs; Nymphon brevirostre; Obelia geniculata; Obelia longissima; Obelia sp.; Pagurus bernhardus; Palaemon longirostris; Pedicellina sp.; Phycinae; Pilayella sp.; Polydora ciliata; Polysiphonia sp.; Polysiphonia violacea; Polytrichium sp.; Praunus flexuosus; Proceraea cornuta; Pycnogonida indeterminata; Red crustacea indeterminata; Salicornia europaea; Sample ID; Sargassum muticum; Semibalanus balanoides; Smut_bent_1; Smut_bent_10; Smut_bent_11; Smut_bent_12; Smut_bent_13; Smut_bent_2; Smut_bent_3; Smut_bent_4; Smut_bent_5; Smut_bent_6; Smut_bent_7; Smut_bent_8; Smut_bent_9; Smut_float_1; Smut_float_10; Smut_float_11; Smut_float_12; Smut_float_2; Smut_float_3; Smut_float_4; Smut_float_5; Smut_float_6; Smut_float_7; Smut_float_8; Smut_float_9; Spinachia spinachia; Status; Styela clava; Suaeda maritima; Sycon ciliatum; Syllidae indeterminata; Sylt, Rømø bight, North Sea; Syngnathus rostellatus; Ulva lactuca; Zostera marina; Zostera noltii; Zostera sp.