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Author Kaartokallio, H.; Kuosa, H.; Thomas, D.N.; Granskog, M.A.; Kivi, K.
Title Biomass, composition and activity of organism assemblages along a salinity gradient in sea ice subjected to river discharge in the Baltic Sea Type Journal Article
Year 2006 Publication Polar Biology Abbreviated Journal Polar Biol
Volume 30 Issue 2 Pages 183-197
Keywords
Abstract A study was undertaken to examine the activity and composition of the seasonal Baltic Sea land-fast sea-ice biota along a salinity gradient in March 2003 in a coastal location in the SW coast of Finland. Using a multi-variable data set, the less well-known algal and protozoan communities, and algal and bacterial production in relation to the physical and chemical environment were investigated. Also, the first coincident measurements of bacterial production and dissolved organic matter (DOM) in a sea-ice system are reported. Communities in sea ice were clearly autotrophy-dominated with algal biomass representing 79% of the total biomass. Protozoa and rotifers made up 18% of biomass in the ice and bacteria only 3%. Highest biomasses were found in mid-transect bottom ice. Water column assemblages were clearly more heterotrophic: 39% algae, 12% bacteria and 49% for rotifers and protozoa. Few significant correlations existed between DOM and bacterial variables, reflecting the complex origin of ice DOM. Dynamics of dissolved organic carbon, nitrogen and phosphorus (DOC, DON and DOP) were also uncoupled. A functional microbial loop is likely to be present in the studied ice. Existence of an under-ice freshwater plume affects the ecosystem functioning: Under-ice water communities are influenced directly by river-water mixing, whereas the ice system seems to be more independent–the interaction mainly taking place through the formation of active bottom communities.
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Corporate Author Thesis
Publisher Springer-Verlag Place of Publication Heidelberg Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0722-4060 ISBN Medium
Area (up) Expedition Conference
Notes Sampling: Nine stations along a 40km salinity gradient from inner Pojo Bay through the Archipelago to the edge of the open sea Approved no
Call Number refbase @ admin @ Kaartokallio_etal2006 Serial 19
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Author Leppäranta, M.; Palosuo, E.; Grönvall, H.; Kalliosaari, S.; Seinä, A.; Peltola, J. (eds)
Title Phases of the ice season in the Baltic Sea (North of 57°N) Type Book Whole
Year 1988 Publication Abbreviated Journal
Volume Issue Pages
Keywords Ice; Ice Extent / Cover; Baltic Sea
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Address
Corporate Author Thesis
Publisher Finnish Institute of Marine Research Place of Publication Helsinki Editor Leppäranta, M.; Palosuo, E.; Grönvall, H.; Kalliosaari, S.; Seinä, A.; Peltola, J.
Language Summary Language Original Title
Series Editor Series Title Finnish Marine Research Abbreviated Series Title Finnish Mar Res
Series Volume 254 Series Issue Edition
ISSN ISBN 0357-1076 Medium
Area (up) Expedition Conference
Notes Approved no
Call Number refbase @ admin @ Leppaeranta_etal1988 Serial 20
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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 (up) Expedition 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 (up) Expedition 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
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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 (up) Expedition Conference
Notes Approved no
Call Number refbase @ admin @ Mueller2002 Serial 23
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