{"refrec":{"BRefID":437776,"RR":"<b>Lewis, C.W.; Schiffrine, N.; Gosselin, M.; Rochon, A.; Amagoalik, J.; Aariak, U.J.; Galley, R.; Lessard, S.; Niemi, A.</b> (2026). Multi-year assessment of coastal sea-ice algae and phytoplankton in an Arctic port ecosystem, Nunavut, Canada. <i>Arct. Sci. 12</i>: 1-17. <a href=\"https://dx.doi.org/10.1139/as-2025-0034\" target=\"_blank\">https://dx.doi.org/10.1139/as-2025-0034</a>","BEntID":435607,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Arct. Sci. 12</i>: 1-17. <a href=\"https://dx.doi.org/10.1139/as-2025-0034\" target=\"_blank\">https://dx.doi.org/10.1139/as-2025-0034</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Lewis, C.W.; Schiffrine, N.; Gosselin, M.; Rochon, A.; Amagoalik, J.; Aariak, U.J.; Galley, R.; Lessard, S.; Niemi, A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Lewis, C.W. <i>et al.</i>","Englishabstract":"This study provides a rare multi-year assessment of sea-ice algal and phytoplankton species diversity in the coastal Canadian Arctic, across sea-ice and open-water habitats, that reflect seasonal gradients critical to ecosystem function. Samples were collected near Iqaluit, Nunavut, in 2018–2022. A total of 562 taxa were identified with <i>Nitzschia frigida</i> Grunow, 1880, unidentified flagellates, <i>Thalassiosira</i> spp<i>.</i> (Cleve, 1873) (20–50&nbsp;µm), and <i>Chaetoceros</i> spp. (Ehrenberg, 1844) (5–10&nbsp;µm) numerically dominating sea-ice, under-ice, ice-crack, and open-water surface habitat, respectively. Simpson diversity of these habitats was highest in ice-crack surface waters (0.94, July 2019), suggesting a physical concentration of cells. Variability in community composition followed Arctic phenology. Sea-ice, open-water bloom, and under-ice/transitional assemblages were differentiated by pennate diatoms (e.g., <i>Navicula pelagica</i> Cleve, 1896 and centric diatoms (e.g., <i>Chaetoceros</i> spp.), as well as Prymnesiophyceae, including <i>Chrysochromulina</i> spp. Lackey, 1939. Six potential toxin producing species were present at low frequency of occurrence (&lt;1%–12% of sampling events). Community composition was homogenous among stations and inlets, but variability in phytoplankton bloom seasonality altered the relative abundance of the under-ice/transitional assemblage. This project provides updated records of sea-ice algae and phytoplankton diversity for the only deep-water port in the eastern Canadian Arctic, documenting seasonal and interannual community variability required to identify potential effects of climate-driven or anthropogenic events.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Multi-year assessment of coastal sea-ice algae and phytoplankton in an Arctic port ecosystem, Nunavut, Canada","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-07-25 01:58:12.702641","timezone_type":1,"timezone":"+02:00"},"AuthorKeywords":"Arctic, coastal ecosystem, ice algae","OtherDescriptors":null,"Notes":null,"AnaPub":2026,"MonPub":null,"DateUpdate":"2026-02-20","DateCreate":"2026-02-20","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1,"DOI":"10.1139/as-2025-0034"},"refs":null,"anarec":{"AnaID":437776,"PubliDate":2026,"Pagination":"1-17","XtraPublOfAnaID":null,"ISBN":null,"Volume":"12","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":319796,"SerRR":"Arctic Science. 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