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1

Holocene environmental instability as recorded in a core from the Slupsk furrow, Southern Baltic

100%
Zgrundo A.
|
|
issue 3-4
59-73
EN
The aim of the study was to investigate Holocene history as recorded in a single sediment core taken from the Slupsk Furrow, southern Baltic Sea, with the use of diatom analysis. Diatom stratigraphy and abundance of cysts of Chrysophyceae Pascher enabled the changes in salinity and depth of the Baltic during the last 7500 years or so to be followed. Four developmental stages of the Baltic Sea were distinguished on this basis: the decline of the Ancylus Lake (or the Ancylus/Mastogloia transition), the Mastogloia Sea, the Litorina Sea and the Postlitorina Sea.
2

Applicability of diatom indices for monitoring water quality in coastal streams in the gulf of Gda?sk region, northern Poland

63%
Zgrundo A., Bogaczewicz-Adamczak B.
Oceanological and Hydrobiological Studies
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2004
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issue 3
31-46
EN
This aim of this study was to test the applicability of diatom indices developed in Europe for monitoring coastal stream waters in northern Poland. Water, sediment, and diatom samples were taken from streams in the resort town of Sopot that discharge into the Gulf of Gdansk. The physical and chemical measurements taken during the sampling period indicated that the purity of the stream waters had improved, and recently they were classified as I class water purity. This is contrasted by the studied waters? diatom communities, which were dominated by eutraphentic taxa. High abundances of -mesosaprobic and -mesosaprobic taxa were recorded at most of the sites. Diatom indices developed for water quality surveillance were calculated with the Omnidia3 database software. Redundancy analyses (RDA), an ordination technique, was used to determine the indices that best correspond to water pollution in coastal streams. The results of the present study indicate that the pollution indices that follow can be applied successfully to monitor flowing freshwaters in the Gulf of Gdansk area in northern Poland: IDAP (Indice Diatomique Artois-Picardie); SPI (Specific Polluosensivity Index); EPI-D (Eutrophication/Pollution Index based on Diatoms), which integrates organic pollution, eutrophication, and mineralization.
3

Occurence and significance of Chaetoceros (Bacillariophyceae) reasting spores in the Holocene sediments of the Baltic Sea

51%
Stachura-Suchoples K., Zgrundo A., Witkowski A.
Oceanological Studies
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1998
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vol. 27
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issue 2
87-92
EN
The material studied originated from the marine Holocene sediments of the Gulf of Gdansk and from Kiel Bay. During the diatom analysis, the interest was focused on the dominance of Chaetoceros resting spores. An abundant occurrence of such resting spores was interpreted in terms of changes of environmental conditions in the study areas. In the fossil sediments, it indicated the inflow of the oceanic waters which caused the salinity increase and the natural rise in the nutrient content, whereas in the subfossil sediments, it marked the increasing human impact.
4

Diatoms as indicators of water pollution in the coast-al zone of the Gulf of Gda?sk (Southern Baltic Sea)

51%
Bogaczewicz-Adamczak B., Klosinska D., Zgrundo A.
Oceanological Studies
|
2001
|
vol. 30
|
issue 3-4
59-75
EN
The subject of the study was microphytobenthos in the sediments of the coastal zone of the Sopot sea-resort (the Gulf of Gdansk). Sediment samples were taken from 12 sites situated in the mouths of the streams and creeks and from the beach close to the sea, once a month from January to December 1998. The indicative groups of diatoms were the basis of the estimation of water quality, taking into consideration its salinity, trophic state and saprobity. The quality of water was classified according to Lange-Bertalot (1979). The results of the diatom studies indicate that the dominating groups were the oligo-halobous and mesohalobous taxa, chatacteristic of highly eutrophic waters. The most abundant groups were the resistant (poly-saprobic and '-mesosaprobic) and tolerant ($-mesosaprobic) diatoms, which are indicators of water quality class III in the coastal zone of the Sopot sea-resort.
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