Improving the paleoceanographic proxy tool kit – On the biogeography and ecology of the sea ice-associated species Fragilariopsis oceanica, Fragilariopsis reginae-jahniae and Fossula arctica in the northern North Atlantic

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dc.contributor University of Helsinki, Ecosystems and Environment Research Programme en
dc.contributor University of Helsinki, Ecosystems and Environment Research Programme en
dc.contributor University of Helsinki, Ecosystems and Environment Research Programme en
dc.contributor.author Weckström, Kaarina
dc.contributor.author Roche, Benjamin Redmond
dc.contributor.author Miettinen, Arto
dc.contributor.author Krawczyk, Diana
dc.contributor.author Limoges, Audrey
dc.contributor.author Juggins, Steve
dc.contributor.author Ribeiro, Sofia
dc.contributor.author Heikkilä, Maija
dc.date.accessioned 2020-06-29T07:50:03Z
dc.date.available 2020-06-29T07:50:03Z
dc.date.issued 2020-05
dc.identifier.citation Weckström , K , Roche , B R , Miettinen , A , Krawczyk , D , Limoges , A , Juggins , S , Ribeiro , S & Heikkilä , M 2020 , ' Improving the paleoceanographic proxy tool kit – On the biogeography and ecology of the sea ice-associated species Fragilariopsis oceanica, Fragilariopsis reginae-jahniae and Fossula arctica in the northern North Atlantic ' , Marine Micropaleontology , vol. 157 , 101860 . https://doi.org/10.1016/j.marmicro.2020.101860 en
dc.identifier.issn 0377-8398
dc.identifier.other PURE: 134232077
dc.identifier.other PURE UUID: 44fdeaef-d5f3-414f-9934-2d69295e401d
dc.identifier.other RIS: urn:3E7365C47E24687F7E7B890E8DA74FF7
dc.identifier.other WOS: 000535536000005
dc.identifier.other ORCID: /0000-0003-4537-2556/work/76724824
dc.identifier.other ORCID: /0000-0002-3889-0788/work/76725289
dc.identifier.other ORCID: /0000-0003-3885-8670/work/76725347
dc.identifier.uri http://hdl.handle.net/10138/317023
dc.description.abstract A long-term perspective is essential for understanding environmental change. To be able to access the past, environmental archives such as marine and lake sediments that store information in the form of diverse proxy records are used. Whilst many analytical techniques exist to extract the information stored in these proxy records, the critical assessment and refinement of current methods in addition to developing new methods is crucial to improving our understanding. This study aims to improve our knowledge on diatom species used for reconstructing ocean surface conditions, especially temperature and sea ice variability over time. We define the distribution and the relationship to sea surface temperature (SST) and sea ice concentrations (SIC) of the species Fragilariopsis oceanica, Fragilariopsis reginae-jahniae and Fossula arctica using diatom training sets from the northern North Atlantic. We further assess the effect of separating these species compared to grouping them under F. oceanica, as has been done in the past. Our results suggest that while these three species share similarities such as the preference for stratified waters induced by sea ice or glacier meltwater, they also exhibit heterogeneous distributions across the northern North Atlantic, with individual optima for SST and SIC. This also affects quantitative reconstructions based on our data, resulting in lower SST and higher SIC estimates when the species are separated in the surface sediment and down-core diatom assemblages. en
dc.format.extent 11
dc.language.iso eng
dc.relation.ispartof Marine Micropaleontology
dc.rights en
dc.subject Diatoms en
dc.subject Indicator species en
dc.subject Biogeography en
dc.subject Ecology en
dc.subject Sea ice reconstruction en
dc.subject Northern North Atlantic en
dc.subject 1181 Ecology, evolutionary biology en
dc.title Improving the paleoceanographic proxy tool kit – On the biogeography and ecology of the sea ice-associated species Fragilariopsis oceanica, Fragilariopsis reginae-jahniae and Fossula arctica in the northern North Atlantic en
dc.type Article
dc.description.version Peer reviewed
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1016/j.marmicro.2020.101860
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/acceptedVersion
dc.type.uri info:eu-repo/semantics/publishedVersion
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