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1

The composition, abundance and distribution of dinoflagellates in the Gulf of Gdansk in the years 1992-1994

100%
Plinski M., Dobron K.
Oceanological Studies
|
1999
|
vol. 28
|
issue 1-2
41-49
EN
The quantitative and qualitative analysis of dinoflagellates from samples taken in the years from 1992 to 1994 in the Gulf of Gdansk has been done. The following species was identified: Hetero-capsa triquetra, Dinophysis norvegica, D. acuminata, Peridinium balticum, P. aciculiferum, P. pellucidum, P. curvipes, P. brevipes, Peridiniella catenata, Gonyaulax triacanta, Prorocentrum micans. The highest quantity of dinoflagellates was observed in May 1994.
2

Occurrence of blue-green algae in the phytoplankton of the Gulf of Gdansk in the years 1994-1997

100%
Witek B., Plinski M.
Oceanological Studies
|
1998
|
vol. 27
|
issue 3
77-82
EN
The development of the blue-green algae in the Gulf of Gdansk begins in May and lasts till October. To the stable compo-nents of the filamentous forms belong Aphanizomenon-flos aquae, Nodularia spumigena, Planktolynbya limnetica, Pseudanabaena limnetica and Planktothrix sp. The coccoid forms are represented by Snowella septentrionalis, S. lacustris, Merismopedia punctata, M. tenuissima, Woronichinia compacta, Rabdogloea linearis, Cyanodictyon imper,fectum, C.planctonicum. In the years 1992 and 1993 the openwater area of the Gulf of Gdansk was characterised by the summer (July) domination of two species of blue-green algae: Microcystis aeruginosa and Aphanizomenon flos-aquae. The presence of Nodularia spumigena was also noticed. In 1994, the extremely dense bloom of Nodularia spumigena occurred with the biomass increase to 130 mg?C? m^3. The intensity of this bloom could be linked to temperature which in summer 1994 was very high and reached over 22?C. In the years 1996 and 1997, temperature did not attained so high values and the intensity of blooms was lower.
3

Microphytobenthos of the shallow littoral of the Southern Baltic

100%
Plinski M., Kwiatkowski J.
Oceanological Studies
|
1996
|
vol. 25
|
issue 4
65-79
EN
The microphytobenthos is the ecological fraction of small plant organisms found in sediments. Hitherto only a few investigations into the microphytobenthos in the southern Baltic have been carried out. The objective of the present study was to determine the species com-position and relative abundance of epipsammic taxa in the shallow littoral zone in the southern Baltic as well as the seasonal fluctuations at selected stations in the Gulf of Gda?sk. The results indicate that three regions of the Polish coastline can be distinguished with respect to the spe-cies composition of microphytobenthic diatoms. The distribution of diatom species is probably related to the environmental conditions occurring in particular regions of the Polish coastline. The percentage of certain diatom species tends to follow a clear seasonal pattern.
4

Effect of salinity, temperature and light on growth of Anabaena flos-aquae and Nostoc sp. div. (cyanobacteria, blue-green algae)

100%
Plinski M., Dziopa M.
|
EN
Two species of blue-green algae have been studied under laboratory conditions in several combinations of salinity (0, 8, 16, 24 PSU), light (20, 70, 120, 170 muE m^-2 s^-1) and temperature (20, 25, 30, 35 ?C). Temperature within the range of 30-35 ?C and light intensity of 170 mE m^-2 s^-1 were the optimum to achieve a maximum growth effect in the two species examined. Salinity as an environmental factor showed that these two tested species are fresh water in origin with some tolerance to increased salinity concentration. The best growth rate for Anabaena flos-aquae was stated in 0 PSU medium for all temperature and light conditions. For Nostoc sp. div. medium with 8 PSU was the optimum one.
5

The distribution of water vegetation on the Polish coast of the Baltic Sea in 1996-2000

100%
Plinski M., Jozwiak T.
Oceanological and Hydrobiological Studies
|
2004
|
issue 2
28-40
EN
Qualitative analysis of vegetation along the Polish coast was conducted. Thirty-six species were noted - 16 of green, 5 of brown and 7 of red algae and 8 of vascular plants. In the 1996-2000 period, the share of green algae was always more than 50% of the floral composition. Only a few species were present throughout the period of investigations, as follows: green algae - Enteromorpha ahlneriana, E. intestinalis, Cladophora albida, Cl. glomerata, Cl. rupestris, Cl. sericea, Cl. vagabunda; brown algae - Pilayella litoralis, Fucus vesiculosus; red algae - Polysiphonia violacea, Ceramium diaphanum; vascular plants - Zostera marina. Some general conclusions can be drawn with reference to the geographical distribution of the species. Enteromorpha intestinalis was the only species that occurred at every station in almost every year. Three species of the genus Cladophora (Cladophora albida, Cl. rupestris, Cl. sericea) and Pilayella litoralis were also very common. Zostera marina was nearly absent from the central part of the Polish coast. Other species occurred rarely and accidentally.
6

Influence of salinity on the growth of Nodularla spumigena Mertens

100%
Musial A., Plinski M.
|
|
issue 2
45-52
EN
The plankton material was sampled in August 1997 from the Gulf of Gdansk. The Cyanobacterium Nodularia spumigena strain ( NSG 0897 ) was isolated from the samples. The effect of salinity on the growth of Nodularia spumigena was studied in the laboratory. Salinity had a significant effect on the number of cells, optical density, concentration of chlorophyll a , dry mass and growth rate. The Nodularia spumigena strain grew well in salinities 4-16 PSU. A salinity of 8 PSU is the best for the growth of this strain.
7

Vegetation along the Polish Coast of the southern Baltic in 1992-95

81%
Plinski M., Kwiatkowska B., Jozwiak T.
Oceanological Studies
|
1996
|
vol. 25
|
issue 4
81-95
EN
The vegetation along the Polish coast was subjected to qualitative analysis. 38 plant taxa were identified: 24 Chlorophyta, 3 Pheophyta, 9 Rhodophyta and 5 Spermatophyta. The seasonal variation in the occurrence of macrophytobenthos in the Gulf of Gdansk was studied. Green algae were most abundant in the summer (May-September), red algae in the autumn (August-November). A significant expansion of Ectocarpaceae species was found to have oc-curred. Ectocarpus siliculosus and Pilayella litoralis, especially the later, are species which have expanded along the whole Polish coast. Enteromorpha species, mainly E. compressa and E. intestinalis, and also Cladophora species, especially C. albida, C. sericea and C. vaga-bunda were common. The changes observed in the vegetation during the last few years show that the increase in trophy is significant because the species diversity has shifted to the domi-nance of one or a few species occurring at very high densities
8

The distribution, species composition and abundance of Enteromorpha spp. in the Gulf of Gdansk

81%
Haroon A. M., Szaniawska A., Plinski M.
Oceanological Studies
|
1999
|
vol. 28
|
issue 1-2
31-39
EN
The variations in distribution, species composition, biomass and water content of Entero-morpha spp. in the Gulf of Gdansk in relation to sampling stations and season are discussed. Only four Entero-morpha species were identified in the samples collected, the most frequent being E. intestinalis (L.) Link. The species composition was found to vary in relation to sampling stations and seasons. The abundance of Enteromorpha spp. varied at different stations with a maximum at Puck variations in biomass were observed. Although Enteromorpha spp. were characterised by a high water content (96.56?0.40% of WW), no statistically significant variations in the water contents of these species with respect to sampling stations could be detected. Although there was a tendency towards seasonal changes, these occurred within a narrow range.
9

The epiphytic flora of Puck Bay phytobenthos in 1991-1992 (without diatoms)

80%
Plinski M., Janas A.
Oceanological Studies
|
1993
|
issue 64/3
197-202
10

Predictional model of biocenotic changes in offshore Baltic plankton due to temperature increase

71%
Plinski M., Zmijewska M. I., Sapota M., Witek B., Mudrak S.
Oceanological and Hydrobiological Studies
|
2003
|
issue 3
29-41
EN
Over the last 20 years, more and more reliable data concerning global climate change, mainly climate warming, have become available in the literature. Change such as this has also been documented in the Gulf of Gdansk. Climate change has an influence on aquatic ecosystems and especially their biocoenoses, and plankton is one of its most sensitive ecological fractions. Positive and negative statistical correlation in the exclusive relationship between the quantity of plankton groups and water temperature has been observed. When time was applied as a factor, only the annual increments of the blue-green algae correlation were statistically significant, and the regression equation calculated in this paper was applied to predict a rise in the population number of this algae in response to increasing temperature. It was not possible to perform this calculation with the other plankton components.
11

Cyanobacterial toxins in fresh and brackish waters of Pomorskie province (northern Poland)

71%
Mazur H., Lewandowska J., Blaszczyka A., Kot A., Plinski M.
Oceanological and Hydrobiological Studies
|
2003
|
issue 1
15-26
EN
Hepatotoxic cyclic peptides and neurotoxic alkaloids are the most common groups of cyanobacterial toxins. They pose a serious threat to human and animal health; each year they are responsible for several cases of animal fatalities (mammals, fish and birds). In Polish water bodies toxic blooms of cyanobacteria are also frequently observed. In this work, a procedure for anatoxin-a analysis has been modified to obtain a sensitive and selective method for routine studies of bloom samples. The presence of cyanobacterial neuro and hepatotoxins in fresh and brackish waters of Pomorskie Province was examined. Hepatotoxins, microcystins or nodularin, were detected in all phytoplankton samples dominated by the cyanobacteria of Microcystis and Anabaena genera or by Nodularia spumigena. HPLC-PDA analysis showed the presence of anatoxin-a only in one sample collected in coastal waters of the Gulf of Gdansk and dominated by Anabaena.
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