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To study dinoflagellate cyst production in the southern Benguela, a sediment trap was deployed for a period of 3.5 years at a single station located downstream of the Cape Columbine upwelling cell on the southern Namaqua shelf. The cyst assemblage of surface sediments below the trap was also...
A Dual-frequency IDentification SONar (DIDSON) provided a powerful tool to determine the numerical abundance and spatial distribution of medusae of the common jellyfish Aurelia aurita s.l. in shallow coastal waters. The sonar image obtained in high frequency (1.8 MHz) mode enabled us to identify...
During baseline studies of ichthyoplankton for environmental impact assessment in the Western Baltic Sea, we developed a simple method for preservation of the abundant ctenophore, Mnemiopsis leidyi, using acidic Lugol's solution.
Virucidal properties of sunlight and temperature have been identified for a long time. However, it is less well established if virioplankton communities are evenly susceptible or geographically adapted to these environmental factors. Transplant experiments were conducted between a tropical...
To describe the variation in bacterioplankton diversity within a large hypertrophic freshwater lake, as well as changes in the diversity that occurred with time, PCR- (denaturing gradient gel electrophoresis) DGGE was utilized to study water samples collected from Lake Taihu in China. To...
The air-dispersed phytoplankton diversity and colonization potential, in a Mediterranean River-Reservoir System (Aliakmon-Polyphytos, Northern Greece), were studied. Phytoplankton samples were collected weekly, from five sampling sites in the river-reservoir system (for 11 weeks) and from jars...
Ciliates from sub-surface waters of the Argentine shelf and the Drake Passage under austral summer and autumn conditions were examined and compared for the first time. In both environments, the taxonomic structure of ciliates was related to temperature and salinity, and aloricate oligotrichs...
Mnemiopsis leidyi larvae were preserved quantitatively for up to 1 year in 5–20% acid Lugol's solution. The highest preservation efficiency and least shrinkage and deformation occurred in the 5% treatment.
Eutrophic tropical freshwater bodies often have cyanobacterial blooms that last throughout the year and some of these blooms may produce compounds that are toxic to Daphnia. Nevertheless, tropical species like Daphnia lumholtzi continue to remain abundant in the presence of such blooms. We...
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