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Oceanologia
EN Prorocentrum minimum (Pavillard) Schiller has occurred in the Gulf of Gdansk in low abundance for several years. However, in summer 1997 a significant increase in the numbers of cells was noted. In the same year a P. minimum bloom was recorded for the first time in one of the harbour basins in Gdyni[...]
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Oceanological Studies
EN Water blooms caused by desmids are very rare. In the mid-forest Lubiec peat bog (pH 4.7-6.8) Desmidium grevillei (Kutz. ex Ralfs) de Bary blooms were observed in the period 1986-1996. They occurred at water temperature of 13-18oC. When temperature rose to 20oC, D. grevillei filaments changed colour [...]
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Oceanologia
2006 No. 48 (3) 447-452
EN The diatom Dactyliosolen fragilissimus (Bergon) Hasle 1996 (syn. Rhizosolenia fragilissima Bergon 1903) occurs in the western Baltic Sea predominantly in summer, sometimes forming blooms. In autumn 2005, numerous D. fragilissimus cells were observed for the first time in the coastal waters of the Gu[...]
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Oceanologia
2009 No. 51 (1) 139-143
EN In April 2001 a local bloom of the heterokont phytoflagellate Pseudochattonella farcimen (Riisberg I., 2008) (initially named Chattonella aff. verruculosa) was observed for the first time in the southern part of the Gulf of Gdańsk. The species occurred in high cell densities: the count was 11.5 × 10[...]
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Oceanologia
2012 No. 54 (1) 109-117
EN Diurnal changes in the structure of the ciliate community in surface waters were studied in the aquaculture area of Dapeng'ao cove, China. Two periods of heavy rainfall occurred during the study period, intensifying water column stratification and influencing the water's properties. A total of 21 ci[...]
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Oceanologia
2003 No. 45 (4) 679-692
EN It is well known that a deficiency of iron, a trace element essential to every living organism, limits the growth of algae and cyanobacteria. Nodularia spumigena Mertens is a blue-green algae species inhabiting the Baltic region that often forms toxic blooms. The aim of the study was to assess t[...]
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Oceanologia
2016 No. 58 (4) 279--291
EN We propose a new approach to indication of algal blooms. It stems from analysis of the multispectral satellite reflectance Rrs of areas where blooms were documented during recent decades. We found that spectra of algal blooms exhibit minima at wavelengths of channels of Moderate Resoluti[...]
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Oceanologia
2018 No. 60 (4) 527--543
EN We examine the narrowband shortwave minima (NSM) of multispectral reflectance as indication of mesoscale algal blooms. They are frequent in the Brazil-Malvinas confluence zone (BMCZ) where our testing site (TS) belongs. Its MODIS A images of December 2008 and 2014 were the source of initial data. Cl[...]
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