10.1594/PANGAEA.954852Fernández-Méndez, MarMarFernández-Méndez0000-0002-4968-1156Stuhr, AnnegretAnnegretStuhrGoldenberg, Silvan UrsSilvan UrsGoldenberg0000-0003-2296-2190PANGAEA2023artificial upwellingcarbon dioxide removaldiatomsGC2019KOSMOSnegative emission technologyocean fertilizationplankton communitysilicic acidSi:NEvent labelDATE/TIMEDay of experimentTreatmentMesocosm labelPhase descriptionLeptocylindrus minimusLeptocylindrus danicusGuinardia delicatulaGuinardia striataSkeletonema sp.Hemiaulus cf. sinensisDactyliosolen cf. fragilissimusCerataulina pelagicaDactyliosolen cf. blavyanusPseudo-nitzschia delicatissimaPseudo-nitzschia sp.Pseudo-nitzschia pungensPseudo-nitzschia subcurvataNitzschia cf. acicularisCylindrotheca sp.Cylindrotheca closteriumRhizosolenia cf. setigeraRhizosolenia cf. imbricataRhizosolenia sp.Chaetoceros cf. lauderiChaetoceros cf. compressusChaetoceros decipiensChaetoceros densusChaetoceros cf. curvisetusChaetoceros cf. tenuissimusChaetoceros cf. lorenzianusChaetoceros cf. aequatorialisClimacodium cf. frauenfeldianumCoscinodiscus sp.Coscinodiscus cf. pavillardiiStriatella cf. unipunctataDiploneis sp.Amphora sp.Minutocellus polymorphusLicmophora sp.Pleurosigma sp.Proboscia sp.Dictyocha fibulaChrysochromulina sp.Phaeocystis cf. globosaPhaeocystis sp.Coccolithophoridae, totalFlagellatesFlagellates indeterminata, ovalPhytoplankton, totalDiatomsSumNumber of taxaPielou evenness indexShannon Diversity IndexLeptocylindrus minimus, biovolumeLeptocylindrus danicus, biovolumeGuinardia delicatula, biovolumeGuinardia striata, biovolumeSkeletonema sp., biovolumeHemiaulus cf. sinensis, biovolumeDactyliosolen cf. fragilissimus, biovolumeCerataulina pelagica, biovolumeDactyliosolen cf. blavyanus, biovolumePseudo-nitzschia delicatissima, biovolumePseudo-nitzschia sp., biovolumePseudo-nitzschia pungens, biovolumePseudo-nitzschia subcurvata, biovolumeNitzschia cf. acicularis, biovolumeCylindrotheca sp., biovolumeCylindrotheca closterium, biovolumeRhizosolenia cf. setigera, biovolumeRhizosolenia cf. imbricata, biovolumeRhizosolenia sp., biovolumeChaetoceros cf. lauderi, biovolumeChaetoceros cf. compressus, biovolumeChaetoceros decipiens, biovolumeChaetoceros densus, biovolumeChaetoceros cf. curvisetus, biovolumeChaetoceros cf. tenuissimus, biovolumeChaetoceros cf. lorenzianus, biovolumeChaetoceros cf. aequatorialis, biovolumeClimacodium cf. frauenfeldianum, biovolumeCoscinodiscus sp., biovolumeCoscinodiscus cf. pavillardii, biovolumeStriatella cf. unipunctata, biovolumeDiploneis sp., biovolumeAmphora sp., biovolumeMinutocellus polymorphus, biovolumeLicmophora sp., biovolumePleurosigma sp., biovolumeProboscia sp., biovolumeDictyocha fibula, biovolumeChrysochromulina sp., biovolumePhaeocystis cf. globosa, biovolumePhaeocystis sp., biovolumeCoccolithophoridae, biovolumeFlagellates, biovolumeFlagellates indeterminata, oval, biovolumePhytoplankton, biovolumeDiatoms, biovolumeMesocosm experimentMicroscopyCalculatedKOSMOS_2019DAM CDRmare - Test-ArtUp: Road testing ocean artificial upwelling (Test-ArtUp)Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean (AQUACOSM)Ocean Artificial Upwelling (Ocean-artUp)Research Mission of the German Marine Research Alliance (DAM): Marine carbon sinks in decarbonisation pathways (CDRmare)2019-09-07T00:00:00/2019-10-09T00:00:00Dataset10.3389/fmars.2022.101518814416 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalAbundance and biovolume data of the community of larger phytoplankton from the mesocosm experiment conducted in the Canary Islands in autumn 2019. Depth-integrated (0-2.5m) water samples were taken in 2-days intervals over the course of 33 days and autotrophic taxa assessed to the lowest taxonomic level possible using Utermöhl microscopy. Only taxa larger than approx. >5 µm could be considered with this method. Biovolume was calculated based on geometrical measurements (dominant taxa) or the literature (rare taxa). Carbon biomass estimates were purposefully not provided, as the standard literature conversion factors from biovolume to carbon biomass did not apply to many of our samples, likely due to low carbon density within cells. Predominantly mixotrophic or heterotrophic taxa are not provided in this dataset. The upwelling treatment started on day 6. Methodological details in Goldenberg et al. (doi:10.3389/fmars.2022.1015188).-15.36879999999999727.989900000000002Canarias SeaFederal Ministry of Education and Researchhttps://doi.org/10.13039/50110000234703F0897ADAM CDRmare - TestArtUp, GEOMARHorizon 2020https://doi.org/10.13039/501100007601695094Ocean Artificial UpwellingHorizon 2020https://doi.org/10.13039/501100007601731065Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean