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Process length variation of the cyst of thedinoflagellate Protoceratium reticulatum in the NorthPacific and Baltic-Skagerrak region: calibration as anannual density proxy and first evidence ofpseudo-cryptic speciation
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2012 (English)In: Journal of Quaternary Science, ISSN 0267-8179, E-ISSN 1099-1417, Vol. 27, no 7, 734-744 p.Article in journal (Refereed) Published
Abstract [en]

Process length variation of cysts of the dinoflagellate Protoceratium reticulatum (Claparede et Lachmann) Butschli in surface sediments from the North Pacific was investigated. The average process length showeda significant inverse relation to annual seawater density: t annual= -0.8674 x average process length +1029.3(R2=0.84), with a standard error of 0.78 kgm-3. A sediment trap study from Effingham Inlet in British Columbiarevealed the same relationship between average process length and local seawater density variations. In the Baltic–Skagerrak region, the average process length variation was related significantly to annual seawater density: t annual =3.5457 x average process length -993.28 (R2=0.86), with a standard error of 3.09 kgm3. These calibrations cannot be reconciled, which accentuates the regional character of the calibrations. This can be related to variations in molecular data (small subunit, long subunit and internal transcribed spacer sequences), whichshow the presence of several genotypes and the occurrence of pseudo-cryptic speciation within this species.

Place, publisher, year, edition, pages
2012. Vol. 27, no 7, 734-744 p.
Keyword [en]
Baltic-Skagerrak; Effingham Inlet; sediment trap; SSS; SST.
National Category
Earth and Related Environmental Sciences
Research subject
Environmental Studies
Identifiers
URN: urn:nbn:se:sh:diva-17102DOI: 10.1002/jqs.2564ISI: 000309743800009ScopusID: 2-s2.0-84867332814OAI: oai:DiVA.org:sh-17102DiVA: diva2:556298
Available from: 2012-09-24 Created: 2012-09-24 Last updated: 2015-07-17Bibliographically approved

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