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Botanica Marina

Editor-in-Chief: Dring, Matthew J.


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Volume 55, Issue 4

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Diversity, occurrence, and habitats of the diatom genus Bacteriastrum (Bacillariophyta) in the northern Adriatic Sea, with the description of B. jadranum sp. nov.

Jelena Godrijan
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  • Center for Marine Research, Ruđer Bošković Institute, Giordano Paliaga 5, 52210 Rovinj, Croatia
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/ Daniela Marić
  • Center for Marine Research, Ruđer Bošković Institute, Giordano Paliaga 5, 52210 Rovinj, Croatia
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/ Mirna Imešek
  • Ruđer Bošković Institute, Department of Molecular Biology, Bijenička cesta 54, 10000 Zagreb, Croatia
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/ Ivica Janeković
  • Department of Oceanography, Marine Sciences Building, University of Hawaii at Manoa, 1000 Pope Road, Honolulu, HI 96822, USA
  • Division for Marine and Environmental Research, Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
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/ Michael Schweikert
  • Biological Institute, Department of Zoology, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany
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/ Martin Pfannkuchen
  • Center for Marine Research, Ruđer Bošković Institute, Giordano Paliaga 5, 52210 Rovinj, Croatia
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Published Online: 2012-05-18 | DOI: https://doi.org/10.1515/bot-2011-0021

Abstract

Ongoing phytoplankton monitoring programs over the last 12 years in the northern Adriatic Sea showed that the diatom genus Bacteriastrum is an important component of the pelagic diatom assemblage. The main goals of this study were to identify which Bacteriastrum species occur in the northern Adriatic Sea and describe their distributions. Bacteriastrum comosum and B. hyalinum f. princeps were rare, while B. delicatulum, B. hyalinum, and B. mediterraneum were frequently present, together with the newly proposed species B. jadranum, described herein. This new species is weakly silicified and is mainly characterized by a large aperture between each cell of the filament. Cells are connected to each other by 8–12 setae, which cross at a distance equivalent to the diameters of 2–3 cells. There is no difference in the orientation of the setae on the two terminal cells, hence the species is placed in the section Isomorpha. The new species was recorded throughout the study area, in both coastal and offshore waters, with higher cell abundances in the vicinity of the Po River during the September–October period. The maximum cell abundance of B. jadranum was 244.2×103cells l-1in the surface waters at 44.75666667ºN, 12.75ºE in September 2006, sometimes representing up to 46% of the entire phytoplankton assemblage, as recorded in the surface waters at 45.06833333ºN, 13.515ºE in October 2008.

Keywords: Bacteriastrum jadranum; diatom taxonomy; northern Adriatic Sea; phytoplankton

About the article

Corresponding author


Received: 2011-05-10

Accepted: 2012-03-30

Published Online: 2012-05-18

Published in Print: 2012-08-01


Citation Information: Botanica Marina, Volume 55, Issue 4, Pages 415–426, ISSN (Online) 1437-4323, ISSN (Print) 0006-8055, DOI: https://doi.org/10.1515/bot-2011-0021.

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