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Author Meiners, K.
Title Sea-ice communities: structure and composition in Baltic, Antarctic and Arctic seas Type Book Whole
Year 2002 Publication Abbreviated Journal
Volume Issue Pages
Keywords Baltic Sea
Abstract Sea ice is an important structural component of polar marine ecosystems but also at lower latitude seas like e.g. the northern Baltic Sea. This study summarises observations on biological, chemical and physical characteristics of sea ice and under-ice water obtained during three expeditions to the Baltic Sea, the Fram Strait area (Arctic) and the Bellingshausen Sea (Antarctica). The study aimed at a better understanding and quantification of different components of the sea ice related food web. The seasonal Baltic sea ice is least studied and therefore the work in this area focused on an inventory determination of the abundance and biomass composition of the sympagic (=ice-associated) community of the Bothnian Bay and Bothnian Sea as well as on the importance of abiotic and biotic factors in the control of ice algal accumulation. The work on the better explored polar sea ice focused on the abundance, distribution and characteristics of transparent exopolymer particles (TEP) in Arctic and Antarctic sea ice. TEP are a recently described class of exopolymeric particles, which are formed abiotically and biotically from polysaccharid-rich precursors. High amounts of TEP-precursors are released by bacteria and algae especially in response to environmental stress. In the pelagic realm TEP are important in the aggregation of diatom blooms, provide the matrix of macroaggregates and serve as substrate and habitat for attached bacteria. High concentrations of TEP have been recently described for Arctic sea ice and may have an important impact on carbon dynamics in sea-ice systems. The present study related TEP concentrations to biotic and abiotic sea ice parameters, potential modes of TEP formation were elucidated and the importance of TEP for the sea-ice habitat was discussed.
Address
Corporate Author Thesis Doctoral thesis
Publisher Institut für Polarökologie, Universität Kiel Place of Publication Kiel Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition (up) Conference
Notes Dissertation; plus 20 pages Appendix Approved no
Call Number refbase @ admin @ Meiners2002 Serial 21
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Author Mock, T.; Meiners, K.M.; Giesenhagen, H.C.
Title Bacteria in sea ice and underlying brackish water at 54°26'50''N (Baltic Sea, Kiel Bight) Type Journal Article
Year 1997 Publication Marine Ecology Progress Series Abbreviated Journal Mar Ecol Prog Ser
Volume 158 Issue 1 Pages 23-40
Keywords Baltic Sea; biomass; bacteria; sea ice; chlorophyll a; Vertical distribution; Polar waters; Chlorophylls; Nutrients (mineral); Brackish Water; Ice Cover; Nutrients; Ane; Germany; Schleswig-Holstein; Kiel Bight; Ice; Chlorophyll; Nitrogen
Abstract Bacterial response to the rare event of solid ice cover in the western Baltic Sea (Kiel Bight) was investigated from February to March 1996. Samples (ice cores, brine and water) were taken at a shallow, near-shore station at irregular time intervals. Bacterial abundance, biomass and production were measured in brine and the underlying water as were the concentrations of NO?, NO?, NH?, PO? and SiO?. Vertical distributions of bacterial abundance, biomass, morphotypes and size classes and chlorophyll a and nutrients were investigated within sea ice. A bacterial growth experiment with brine bacteria was carried out to measure bacterial carbon production via total incorporation of [³H]thymidine (TTI) and [³H]leucine (TLI). During February the abundance, biomass and production of bacteria within brine exceeded values from under-ice water, whereas the opposite was observed in March. High NO? and NH? concentrations in ice and under-ice water of up to 112 µM and 55 µM, respectively, resulted in N:P ratios of 18 to 330. Algae and bacteria were considered to benefit from that nutrient supply. For bacteria this was supported by TTI and particularly high TLI rates during the ice situation, with TLI:TTI ratios of 25 to 213.
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Corporate Author Thesis
Publisher Inter-Research Place of Publication Oldendorf/Luhe Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0171-8630 ISBN Medium
Area Expedition (up) Conference
Notes Contains comparison among nutrient concentrations of polar regions and of the Baltic Sea Approved no
Call Number refbase @ admin @ Mock_etal1997 Serial 22
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Author Müller, H.
Title The distribution of “Belt Sea cod” and “Baltic cod” in the Baltic Sea from 1995 to 2001 estimated by discriminant analysis of the number of dorsal fin rays Type Journal Article
Year 2002 Publication ICES Council Meeting Abbreviated Journal Ices Cm
Volume L:16 Issue Pages 23
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Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition (up) Conference
Notes Approved no
Call Number refbase @ admin @ Mueller2002 Serial 23
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Author Mälkki, P.; Tamsalu, R.
Title Physical features of the Baltic Sea Type Book Whole
Year 1985 Publication Abbreviated Journal
Volume Issue Pages
Keywords Baltic Sea; Bottom Topography; Climate; Salinity; Temperature; Ice; Ice Extent / Cover
Abstract
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Corporate Author Thesis
Publisher Finnish Institute of Marine Research Place of Publication Helsinki Editor
Language Summary Language Original Title
Series Editor Series Title Finnish Marine Research Abbreviated Series Title Finnish Mar Res
Series Volume 252 Series Issue Edition
ISSN ISBN 951-46-8594-6 Medium
Area Expedition (up) Conference
Notes authors report that ice coverage lasts for 2 to 6 months (mean: 3 months) on the SW coast of Finland Approved no
Call Number refbase @ admin @ Maelkki+Tamsalu1985 Serial 24
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Author Steffens, M.; Granskog, M.A.; Kaartokallio, H.; Kuosa, H.; Luodekari, K.; Papadimitriou, S.; Thomas, D.N.
Title Spatial variation of biogeochemical properties of landfast sea ice in the Gulf of Bothnia, Baltic Sea Type Conference Article
Year 2006 Publication Annals of Glaciology Abbreviated Journal
Volume Issue Pages 80-87
Keywords Sea ice; Fast ice; Sea ice properties; Ice algae; Chlorophyll; Biogeochemistry; Nutrients (mineral); Particulate organic matter; Dissolved organic matter; Salinity; Spatial scale; Spatial variability; Horizontal patchiness; Sampling design; Brackish water; Ane; Baltic Sea; Gulf of Bothnia
Abstract Horizontal variation of landfast sea-ice properties was studied in the Gulf of Bothnia, Baltic Sea, during March 2004. In order to estimate their variability among and within different spatial levels, 72 ice cores were sampled on five spatial scales (with spacings of 10 cm, 2.5 m, 25 m, 250 m and 2.5 km) using a hierarchical sampling design. Entire cores were melted, and bulk-ice salinity, concentrations of chlorophyll a (Chl a), phaeophytin (Phaeo), dissolved nitrate plus nitrite (DIN) as well as dissolved organic carbon (DOC) and nitrogen (DON) were determined. All sampling sites were covered by a 5.5-23 cm thick layer of snow. Ice thicknesses of cores varied from 26 to 58 cm, with bulk-ice salinities ranging between 0.2 and 0.7 as is typical for Baltic Sea ice. Observed values for Chl a (range: 0.8-6.0 μg Chl a l-¹; median: 2.9 μg Chl a l -¹) and DOC (range: 37-397 μM; median: 95 μM) were comparable to values reported by previous sea-ice studies from the Baltic Sea. Analysis of variance among different spatial levels revealed significant differences on the 2.5 km scale for ice thickness, DOC and Phaeo (with the latter two being positively correlated with ice thickness). For salinity and Chl a, the 250 m scale was found to be the largest scale where significant differences could be detected, while snow depth only varied significantly on the 25 m scale. Variability on the 2.5 m scale contributed significantly to the total variation for ice thickness, salinity, Chl a and DIN. In the case of DON, none of the investigated levels exhibited variation that was significantly different from the considerable amount of variation found between replicate cores. Results from a principal component analysis suggest that ice thickness is one of the main elements structuring the investigated ice habitat on a large scale, while snow depth, nutrients and salinity seem to be of secondary importance.
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Corporate Author Thesis
Publisher International Glaciological Society Place of Publication Cambridge Editor International Symposium on Sea Ice, D.(N.Z.), 5-9 Dec 2005,
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title Ann Glaciol
Series Volume 44 Series Issue 1 Edition
ISSN 0260-3055 ISBN Medium
Area Expedition (up) Conference insert.Annals of Glaciology
Notes Approved no
Call Number refbase @ admin @ Steffens_etal2006 Serial 25
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