| Records |
| 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 |
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| 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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Thesis |
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| Publisher |
Springer-Verlag |
Place of Publication |
Heidelberg |
Editor |
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| Language |
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Summary Language  |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0722-4060 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| 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 |
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Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
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| Keywords |
Ice; Ice Extent / Cover; Baltic Sea |
| Abstract |
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| Publisher |
Finnish Institute of Marine Research |
Place of Publication |
Helsinki |
Editor |
Leppäranta, M.; Palosuo, E.; Grönvall, H.; Kalliosaari, S.; Seinä, A.; Peltola, J. |
| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
Finnish Marine Research |
Abbreviated Series Title |
Finnish Mar Res |
| Series Volume |
254 |
Series Issue |
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Edition |
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| ISSN |
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ISBN |
0357-1076 |
Medium |
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Expedition |
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Conference |
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| Notes |
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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 |
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Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
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| 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. |
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Thesis |
Doctoral thesis |
| Publisher |
Institut für Polarökologie, Universität Kiel |
Place of Publication |
Kiel |
Editor |
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Summary Language |
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Original Title |
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Series Title |
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Edition |
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| 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. |
| Address |
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Thesis |
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| Publisher |
Inter-Research |
Place of Publication |
Oldendorf/Luhe |
Editor |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Issue |
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Edition |
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| ISSN |
0171-8630 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| 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 |
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Pages |
23 |
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| Notes |
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Approved |
no |
| Call Number |
refbase @ admin @ Mueller2002 |
Serial |
23 |
| Permanent link to this record |
