{"refrec":{"BRefID":345213,"RR":"<b>Franke, K.; Liesner, D.; Heesch, S.; Bartsch, I.</b> (2021). Looks can be deceiving: contrasting temperature characteristics of two morphologically similar kelp species co-occurring in the Arctic. <i>Bot. Mar. 64(3)</i>: 163-175. <a href=\"https://dx.doi.org/10.1515/bot-2021-0014\" target=\"_blank\">https://dx.doi.org/10.1515/bot-2021-0014</a>","BEntID":341848,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Bot. Mar. 64(3)</i>: 163-175. <a href=\"https://dx.doi.org/10.1515/bot-2021-0014\" target=\"_blank\">https://dx.doi.org/10.1515/bot-2021-0014</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Franke, K.; Liesner, D.; Heesch, S.; Bartsch, I.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Franke, K. <i>et al.</i>","Englishabstract":"Two morphologically similar digitate kelp species, <em>Laminaria digitata</em> and <em>Hedophyllum nigripes</em>, co-occur along a shallow sublittoral depth gradient in the Arctic but, in contrast to <em>L.&nbsp;digitata</em>, very few ecophysiological data exist for <em>H.&nbsp;nigripes</em>. We investigated growth, survival, photosynthetic characteristics and carbon:nitrogen ratios of juvenile sporophytes, and recruitment and survival of gametophytes in genetically verified Arctic isolates of both species along temperature gradients (0–25&nbsp;°C) over 14&nbsp;days. <em>Laminaria digitata</em> gametophytes survived 23–24&nbsp;°C, while sporophytes survived 21–22&nbsp;°C. <em>Hedophyllum nigripes</em> had lower temperature affinities. Gametophytes survived 19–21&nbsp;°C, while sporophytes survived 18&nbsp;°C. Male gametophytes were more heat-tolerant than female gametophytes in both species. The&nbsp;pronounced cold adaption of <em>H.&nbsp;nigripes</em> compared to&nbsp;<em>L.&nbsp;digitata</em> also became apparent in different sporophyte growth optima (<em>L.&nbsp;digitata</em>: 15&nbsp;°C; <em>H.&nbsp;nigripes</em>: 10&nbsp;°C) and gametogenesis optima (<em>L.&nbsp;digitata</em>: 5–15&nbsp;°C; <em>H.&nbsp;nigripes</em>: 0–10&nbsp;°C). Higher carbon:nitrogen ratios in <em>H.&nbsp;nigripes</em> suggest an adaptation to nutrient poor Arctic conditions. The overall temperature performance of <em>H.&nbsp;nigripes</em> possibly restricts the species to Arctic–Sub-Arctic regions, while Arctic <em>L.&nbsp;digitata</em> behaved similarly to cold-temperate populations. Our data suggest that a future increase in seawater temperatures may hamper the success of <em>H.&nbsp;nigripes</em> and favour <em>L.&nbsp;digitata</em> in Arctic environments.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Looks can be deceiving: contrasting temperature characteristics of two morphologically similar kelp species co-occurring in the Arctic","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-16 01:33:27.923067","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"C:N-ratio; gametogenesis; growth rate; PAM fluorometry; sporophyte","OtherDescriptors":null,"Notes":null,"AnaPub":2021,"MonPub":null,"DateUpdate":"2021-09-22","DateCreate":"2021-09-22","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000660531300001","VABBcode":null,"OpenAcc":1,"DOI":"10.1515/bot-2021-0014"},"refs":null,"anarec":{"AnaID":345213,"PubliDate":2021,"Pagination":"163-175","XtraPublOfAnaID":null,"ISBN":null,"Volume":"64","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42293,"SerRR":"Botanica Marina. Walter de Gruyter & Co: Berlin; New York.  ISSN 0006-8055; e-ISSN 1437-4323","StandardTitleSer":"Botanica Marina","ISSN":"0006-8055","AbbrevSer":"Bot. 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