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Influence of sea ice on the composition of the spring phytoplankton bloom in the northern Baltic Sea
Calculations of sinking rates and residence times of the dominant ice algal species in the photic water column indicated that only one iceAlgae species (Chaetoceros wighamii) had a seeding effect on the water column: this diatom dominated the spring phytoplankton bloom in the water together with Achnanthes taeniata and Peridiniella catenata. Expand
Primary and bacterial production in sea ice in the northern Baltic Sea
The temporal variation of ice primary and bacterial production along with ice algal, bacterial and heterotrophic flagellate biomass were studied at a coastal station in the northern Baltic SeaExpand
Succession and growth limitation of phytoplankton in the Gulf of Bothnia (Baltic Sea)
A one year field study of four stations in the Gulf of Bothnia during 1991 showed that the biomass was ca. two times, and primary productivity ca. four times, lower in the north (Bothnian Bay) thanExpand
Efficiency of a phytoplankton‐based and a bacterial‐based food web in a pelagic marine system
Climate change, with increased precipitation and river runoff in the Baltic Sea, might favor a bacteria-based food web and thereby reduce pelagic productivity at higher trophic levels, supported by stable isotope analysis of mesozooplankton. Expand
Development of ice biota in a temperate sea area (Gulf of Bothnia)
A study of sea ice biota was carried out in the Gulf of Bothnia during the winter of 1989–1990 and the presence of heterotrophic organisms of different trophic levels indicated an active microbial food web. Expand
A Vibrio cholerae protease needed for killing of Caenorhabditis elegans has a role in protection from natural predator grazing.
A key role for PrtV is demonstrated in V. cholerae interaction with grazing predators, and Caenorhabditis elegans is established as a convenient organism for identification of V. Cholerae factors involved in host interactions and environmental persistence. Expand
Factors structuring the heterotrophic flagellate and ciliate community along a brackish water primary production gradient
The field data indicated that the protozoan community in general was resource controlled, and choanoflagellates, large flagellate and ciliates showed a significant relationship to latitude and salinity, explaining 12-24% of the variation. Expand
Size-selective grazing by a microflagellate on pelagic bacteria
It is concluded that bacterial size distribution in the sea can be affected by size-selective grazing of heterotrophic microflagellates, and it is suggested that this explains the decrease in median bacterial volume during the summer. Expand