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Distribution and extent of benthic habitats in Puck Bay (Gulf of Gdańsk, southern Baltic Sea)

Sokołowski Adam, Jankowska Emilia, Balazy Piotr, Jędruch Agnieszka

Oceanologia

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2021

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No. 63 (3)

301--320

EN

The majority of the southern Baltic Sea seabed encompasses homogenous soft-bottom sediments of limited productivity and low biological diversity, but shallow productive areas in the coastal zone such as wetlands, vegetated lagoons and sheltered bays show a high variety of benthic habitat types offering favourable biotopic conditions for benthic fauna. Within Polish marine areas, semi-enclosed Puck Bay (the western part of the Gulf of Gdańsk) features an exceptionally diverse environment covering a range of benthic habitats which underscores its unique biological value and aesthetic quality and providing an impetus for conservation and ecosystem-based development. Full-coverages maps on benthic habitats in this area are therefore a necessary foundation for maritime spatial planning and implementation of strategies for sustainable management and protection of the coastal environment. This study presents the first comprehensive description and distribution of benthic habitats in Puck Bay which were categorised using the revised EUNIS 2019 classification system. Typological analyses were carried out based on inventory datasets from 1995 to 2019 including scientific publications, satellite images, open databases, topographic and geological maps, reports, theses, information available on websites and unpublished data shared willingly by individual researchers and administrative institutions. Collating various spatial data sources, that were first georeferenced and then visualized using techniques available in ArcMap 10.4.1 software (Esri), resulted in the mapping of benthic habitats and sites of important and protected plant species, which can contribute to the high confidence in environmental assessments and monitoring activities.

2

Non-indigenous tanaid Sinelobus vanhaareni Bamber, 2014 in the Polish coastal waters : an example of a successful invader

Brzana Radosław, Marszewska Lena, Normant-Saremba Monika, Błażewicz Magdalena

Oceanological and Hydrobiological Studies

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2019

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Vol. 48, No. 1

76--84

EN

The paper reports on the first record of Sinelobus vanhaareni, a non-native tanaid, in the Polish coastal waters (Gulf of Gdansk, southern Baltic Sea). The species was found in the port of Gdynia in 2014, while in 2015–2017 it already colonized the western part of the Gulf of Gdansk, inhabiting mainly hard substrates, including both natural (e.g. boulders) and anthropogenic ones (e.g. vertical concrete piles or walls of offshore structures and breakwaters, horizontal PVC plates and oyster shells used as filling in habitat collectors). During the survey period, S. vanhaareni was found in different seasons of the year (from winter and early spring to autumn), which, combined with the presence of ovigerous females as well as high abundance (up to tens of thousands of individuals per square meter), allows us to assume that the species has already established a population in the Gulf of Gdansk.

3

Evaluation of claws as an alternative route of mercury elimination from the herring gull (Larus argentatus)

Grajewska Agnieszka, Falkowska Lucyna, Reindl Andrzej

Oceanological and Hydrobiological Studies

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2019

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Vol. 48, No. 2

165--173

EN

Mercury enters the body of seabirds in its most toxic organic form, i.e. methylmercury, mainly via the alimentary tract. Inside the body, mercury is transformed into less toxic forms and accumulates in the internal organs. The process of mercury removal from the body, most effective during the formation of new feathers and claws, is beneficial for the bird. The presented research was undertaken on account of the high affinity of mercury to keratin – a protein that forms feathers and claws – to compare the concentration levels (HgTOT) in these structures and to assess their contribution to the purification of the body of herring gulls (Larus argentatus) Bird feathers are the only epidermal structure that is extensively described in the literature, whereas the claws have so far been poorly researched. The study has shown that mercury in claws is built in as effectively as in feathers, and the obtained concentrations were within a wide range of 127.2–5341.5 ng HgTOT g–1 of dry weight. In addition, the concentrations of total mercury accumulated in the claws were a better reflection of Hg levels in internal organs compared to feathers.

4

The spatial and temporal structure of phytoplankton in 2014-2016 in the Poddabie area on the southern Baltic Sea

Zaboroś I., Mioskowska M.

Biuletyn Instytutu Morskiego w Gdańsku

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2018

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Vol. 33, No. 1

189--203

EN

In the Baltic Sea, there can be observed seasonal changes of the phytoplankton structure during which the species composition, abundance and phytoplankton biomass change. However, the spatial and temporal variability of individual phytoplankton groups is not the same in all the regions of the Baltic. The only research (and available studies) of phytoplankton in these shallow central sea basin zones is conducted by Institute of Meteorology and Water Management (IMWM) as part of the HELCOM Baltic Sea Monitoring at station P16, which is located closest to the studied area. Therefore, in the years 2014-2016 phytoplankton seasonality studies were carried out, which allowed to supplement data in the area of the central coast of the south Baltic [61]. Based on the above literature, the aim of this study was to determine the temporal and spatial structure and to examine the species composition of phytoplankton occurrence and biodiversity in the Poddabie region from November 2014 till September 2016. The following article presents the results obtained at 3 measuring stations (P1, P2 and P3) in the area of Poddabie. These results confirm typical changes of phytoplankton on 3 measurement stations depending on the season of the year. The collected data for this article is the second part of the three monographs on the area on the central coast of the southern Baltic. It show the exact results of the species composition and seasonal changes of phytoplankton in the Poddabie region. The average values of phytoplankton abundance and biomass were typical for this sort of coastal waters and there were no significant species differences between these stations. Comparing the results obtained in this study with the data from the IMWM annual reports for the last decade, it can be noticed that the volumes and fluctuations of total biomass and phytoplankton abundance in the three analysed areas are in line with trends typical for the South Baltic coastal area.

PL

W Morzu Bałtyckim obserwuje się sezonowe zmiany struktury fitoplanktonu podczas której następuje zmiana składu gatunkowego, liczebności oraz biomasy fitoplanktonu. Jednakże przestrzenna i czasowa zmienność poszczególnych grup fitoplanktonu nie jest taka sama w różnych rejonach Bałtyku. Jedyne badania (oraz dostępne opracowania) fitoplanktonu w tych strefach płytkowodnych środkowego wybrzeża prowadzone są przez IMGW w ramach Monitoringu Bałtyku HELCOM na stacji P16, które są położenie najbliżej badanego rejonu. W tym celu w latach 2014-2016 wykonano badania sezonowości fitoplanktonu, co pozwoliło na uzupełnienie danych w obszarze środkowego wybrzeża południowego Bałtyku [61]. W oparciu o powyższą literaturę celem niniejszej pracy było określenie struktury czasowo-przestrzennej i zbadanie składu gatunkowego występowania fitoplanktonu oraz różnorodności biologicznej w rejonie Poddąbia w okresie listopad 2014 – wrzesień 2016. Poniższy artykuł przedstawia wyniki uzyskane na 3 stacjach pomiarowych (P1, P2 oraz P3) w rejonie Poddąbia. Wyniki te potwierdzają typowe zmiany fitoplanktonu na 3 stacjach pomiarowych w zależności od pory roku. Średnie wartości liczebności i biomasy fitoplanktonu były typowe dla tego rodzaju wód przybrzeżnych i nie odnotowano znaczących różnic gatunkowych pomiędzy tymi stacjami. Porównując otrzymane w tym opracowaniu wyniki do danych z rocznych raportów IMGW dla ostatniego dziesięciolecia, można zauważyć, że wielkości i fluktuacje całkowitej biomasy i liczebności fitoplanktonu w trzech badanych rejonach są zgodne z trendami typowymi dla rejonu wód przybrzeżnych Południowego Bałtyku.

5

Seasonal variability of phytoplankton in river Słupia of the southern Baltic Sea

Zaboroś I., Mioskowska M.

Biuletyn Instytutu Morskiego w Gdańsku

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2018

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Vol. 33, No. 1

137--150

EN

In the Baltic Sea, there can be observed seasonal variations in the structure of phytoplankton. These organisms are particularly sensitive to changes in different environmental parameters. The consequence of these changes is cyclical repeated every year fluctuation of the species composition, their abundance and biomass of phytoplankton. The spatial and temporal variability of individual phytoplankton groups is not the same in different regions of the Baltic Sea, and this is why the study was conducted in the area of the central Baltic coast, since in that particular region data on phytoplankton is not available. One of the main goals was to determine the temporal and spatial structure of the occurrence of phytoplankton, as well as to study biodiversity in the area of the estuary of the Slupia river in southern Baltic for the period between November 2014 and September 2016. The results of the research confirm typical changes of phytoplankton in three studied areas depending on the given season. The average values of phytoplankton abundance and biomass were typical for this kind of coastal waters and there were no significant species differences between these stations. The only research (and available studies) on phytoplankton in central sea basin areas is being conducted by Institute of Meteorology and Water Management (IMWM) as part of the HELCOM Baltic Sea Monitoring at station P16, which is the closest location to the studied area. When comparing the results obtained in this study to the data from the IMWM annual reports for the last decade, it can be noticed that the size and fluctuations of total biomass and phytoplankton abundance in the three studied areas are typical for the coastal region of the South Baltic.

PL

W Morzu Bałtyckim obserwuje się sezonowe zmiany struktury fitoplanktonu. Organizmy te są szczególnie wrażliwe na zmiany różnych parametrów środowiska. Konsekwencją tych zmian jest cykliczna, powtarzająca się co roku, fluktuacja składu gatunkowego, liczebności oraz biomasy fitoplanktonu. Przestrzenna i czasowa zmienność poszczególnych grup fitoplanktonu nie jest taka sama w różnych rejonach Bałtyku, dlatego badania wykonano w obszarze środkowego wybrzeża południowego Bałtyku gdyż, w tamtym rejonie nie ma dostępnych danych dotyczących fitoplanktonu. Jednym z głównych celów było zbadanie struktury czasowo-przestrzennej występowania fitoplanktonu, a także określenie różnorodności biologicznej w ujściu rzeki Słupia w rejonie południowego Bałtyku w latach listopad 2014 – wrzesień 2016. Wyniki uzyskane w ramach prowadzonych badań potwierdzają typowe zmiany fitoplanktonu w trzech rejonach w zależności od pory roku. Średnie wartości liczebności i biomasy fitoplanktonu były typowe dla tego rodzaju wód przybrzeżnych i nie odnotowano znaczących różnic gatunkowych pomiędzy tymi stacjami. Jedyne badania (oraz dostępne opracowania) fitoplanktonu w tych strefach płytkowodnych środkowego wybrzeża prowadzone są przez IMGW w ramach Monitoringu Bałtyku HELCOM na stacji P16, które są położenie najbliżej badanego rejonu. Porównując otrzymane w tym opracowaniu wyniki do danych z rocznych raportów IMGW dla ostatniego dziesięciolecia, można zauważyć, że wielkości i fluktuacje całkowitej biomasy i liczebności fitoplanktonu w trzech badanych rejonach są typowe dla rejonu wód przybrzeżnych Południowego Bałtyku.

6

First record of the North American amphipod Melita nitida Smith, 1873 in Polish coastal waters

Normant-Saremba M., Marszewska L., Kerckhof F.

Oceanological and Hydrobiological Studies

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2017

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Vol. 46, No. 1

108--115

EN

The present paper reports the first observation of the North American amphipod Melita nitida Smith, 1873 in the Gulf of Gdańsk (the southern Baltic Sea, Poland). In 2014, 13 adult specimens, including 3 males, were collected in the Port of Gdynia, which is located in the western part of this waterbody.

7

Biological factor controlling methane production in surface sediment in the Polish part of the Vistula Lagoon

Reindl A. R., Bolałek J.

Oceanological and Hydrobiological Studies

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2017

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Vol. 46, No. 2

223--230

EN

Due to the limited water exchange, lagoons are particularly prone to eutrophication. The consumption of oxygen in this process, coupled with simultaneous enrichment of bottom sediments with organic matter, reinforces the occurrence of anaerobic conditions and methanogenic growth. Methanogenic archaea activities cause depolymerization of organic compounds accumulated in sediments. As a result of such ecosystem transformation, methane might be produced and emitted from this basin. Chemical studies conducted in 2010 were focused on methane content in the surface bottom sediments in the Polish part of the Vistula Lagoon. The results showed that the highest methane concentration occurs in the southwestern part of this basin (6.45 mmol dm-3), while the lowest one in the southeastern part (7.1 × 10-3 mmol dm-3). Molecular studies were focused on specific methanogenic archaea gene identification. The comparison of nucleotide sequences of “mcrA gene” clones obtained from genomic DNA isolated from the Vistula Lagoon sediments indicates a similarity to the yet uncultivated archaea, but also to archaea from the Methanosarcinales and Methanomicrobiales orders.

8

Baltic Sea Holocene evolution based on OSL and radiocarbon dating : evidence from a sediment core from the Arkona Basin (the southwestern Baltic Sea)

Kostecki R., Moskal P.

Oceanological and Hydrobiological Studies

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2017

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Vol. 46, No. 3

294--306

EN

The paper presents the chronology of the Holocene evolution of the Baltic Sea based on the optically stimulated luminescence (OSL) and radiocarbon dating methods applied to a core taken from the Arkona Basin. The dating results were supplemented by grain size and geochemical analysis. The obtained results of OSL and radiocarbon dating enabled the construction of an age-depth model and confirmed the continuous sedimentation since 9900 cal yrs BP. One of the most interesting findings of this study is a clear relationship between the rate of sedimentation and fluctuations in the energy of depositional environment. The analyzed sediment core revealed two sections of different accumulation rates. The bottom section was deposited until 2700 cal yrs BP when the Ancylus Lake and the Littorina Sea were present, characterized by the accumulation rate estimated at around 0.46 mm year-1 and the dynamic sedimentation environment confirmed by grain size parameters. The accumulation rate at the top section deposited during the Post-Littorina Sea stage was estimated at around 1 mm year-1. This stage, characterized by more stable deposition and lower-energy environment conditions, was confirmed by small grain size, symmetric skewness and increasing content of organic matter.

9

Occurrence of the parasite Prosorhynchus squamatus (Digenea) in mussels Mytilus trossulus from the Gulf of Gdańsk (the southern Baltic Sea)

Rolbiecki L., Wołowicz M., Dołęga M.

Oceanological and Hydrobiological Studies

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2016

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Vol. 45, No. 4

615--619

EN

Sporocysts with cercariae of Prosorhynchus squamatus Odhner, 1905 (Digenea, Bucephalidae) have been found for the first time in mussels Mytilus trossulus Gould, 1850 from the Gulf of Gdańsk (the southern Baltic Sea). The presented work provides a description and morphometry of larvae of this parasite.

10

Proterozoiczne podłoże krystaliczne polskiej części Bałtyku w świetle badań strukturalnych

Cymerman Z.

Przegląd Geologiczny

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2015

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Vol. 63, nr 4

228–-238

EN

This paper presents structural data and regional correlations based on drill cores from 8 boreholes (B2-1/80, B3-1/81, B4-1/81, B6-1/82, B6-2/85, B7-1/91, B16-1/85 and B21-1/95) penetrating Precambrian crystalline rocks in the Polish part of the Baltic Sea. The crystalline rocks from the ftom these boreholes were compared to cores from several wells in Eastern Pomerania, and the Kashubian and Warmia regions and above all with the Mesoproterozoic granitoids and metamorphic rocks of Bornholm and Southern Sweden. The pre-existing basement map of the Southern Baltic, showing Palaeoproterozoic or even Archaean granitoid massifs and narrow north-south fold belts is questioned. Instead, in the present interpretation, the studied area of the Polish part of the Southern Baltic Sea is underlain by a fragment of the Mesoproterozoic (ca. 1.47–1.43 Ga) Danopolonian („Hallandian”) orogeny, comprising mainly regional-scale ductile shear zones, which, striking probably in W–E to WNW–ESE directions, are characterized by the predominance of a thrust to transpressional strain regime with tectonic transport top-to-the S or SSW. The structural kinematic and lithological interpretations of these shear zones are based on comparison with the other parts of the East European Craton that are exposed in Bornholm and the Blekinge and Skne regions in Southern Sweden.

11

Non-native crab Rhithropanopeus harrisii (Gould, 1984) - a new component of the benthic communities in the Gulf of Gdańsk (southern Baltic Sea)

Hegele-Drywa J., Normant M.

Oceanologia

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2014

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No. 56 (1)

125--139

EN

The aim of this study was to determine the occurrence, spatial distribution and abundance pattern of the Harris mud crab Rhithropanopeus harrisii in the Gulf of Gdańsk (southern Baltic Sea). Between 2006 and 2010, this species was found at 69 out of 129 sampling stations, at depths from 0 to 20 m. Two main aggregations of the Harris mud crab were established: (1) in Puck Bay (max. density 19 indiv. 100 m-2) and (2) in the Gdynia and Sopot area (max. density 5 indiv. 100 m-2). 920 specimens were collected during the whole sampling period: 150 juveniles, 370 females and 400 males. The minimum measured carapace width was 1.96 mm, the maximum 21.40 mm (mean 9.03 ±4.11 mm).

12

Baltic Sea coastal erosion; a case study from the Jastrzębia Góra region

Uścinowicz G., Kramarska R., Kaulbarsz D., Jurys L., Frydel J., Przezdziecki P., Jegliński W.

Geologos

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2014

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Vol. 20, No. 4

259--268

EN

The coastline in the Jastrzębia Góra area can be divided into three major zones of general importance: a beach and barrier section, a cliff section, and a section protected by a heavy hydrotechnical construction. These areas are characterised by a diverse geology and origin, and hence different vulnerability to erosion. In addition, observations have demonstrated a different pace of erosion within each zone. Based on the results obtained by remote sensing methods (analysis of aerial photographs and maps), it has been determined that the coastline in the barrier area, i.e., to the west of Jastrzębia Góra, moved landwards by about 130 m, in a period of 100 years, and 80 m over about 50 years. A smaller displacement of the shoreline could be observed within the cliff. Between the middle of the twentieth and the start of the twenty-first centuries the shore retreated by about 25 m. However, in recent years, an active landslide has led to the displacement of the uppermost part of the cliff locally up to 25 m. Another issue is, functioning since 2000, a heavy hydrotechnical construction which has been built in order to protect the most active part of the cliff. The construction is not stable and its western part, over a distance of 50 m, has moved almost 2 m vertically downwards and c. 2.5 m horizontally towards the sea in the past two years. This illustrates that the erosional factor does not comprise only marine abrasion, but also involves land-based processes determined by geology and hydrogeology. Changes in the shoreline at the beach and barrier part are constantly conditioned by rising sea levels, the slightly sloping profile of the sea floor and low elevation values of the backshore and dune areas. Cliffs are destroyed by mass wasting and repetitive storm surges that are responsible for the removal of the colluvium which protects the coast from adverse wave effects. Presumably, mass movements combined with groundwater outflow from the cliff, plus sea abrasion cause destabilisation of the cliff protection construction.

13

Persistent organic pollutants (POPs) in the marine food web: herrings from the southern Baltic Sea (Clupea harengus) - penguins from the zoo (Spheniscus demersus)

Reindl A. R., Bolałek J., Falkowska L.

Oceanological and Hydrobiological Studies

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2013

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Vol. 42, No. 1

51-58

EN

The aim of this project was to study the fate of chemically persistent organochlorine xenobiotics in the marine link of the food web, between penguins and herrings (Clupea harengus), which are the only food for Spheniscus demersus from the Gdańsk Zoo. Concentrations of hexachlorobenzene (HCBz), pentachlorobenzene (PCBz), trichlorobenzene (TCBz) and the .- HCH isomer were determined in Baltic herrings, in muscles, fat and liver of penguins, unhatched eggs, contour feathers and guano. The highest concentrations of fungicides were observed for HCBz. Fungicides were not detected in the liver of penguins and herrings. The bioaccumulation factor (BAF) for fungicides reached the highest values in the penguin brain. The highest biomagnification factor (BMF) for PCBz was determined in the muscle tissue and for lindane – in liver. It was confirmed that detoxification of penguins occurred through deposition of fungicides and lindane in guano and through epithelial tissue and eggs.

14

Distribution and abundance of microflora in sandy beaches on the southern coast of the Baltic Sea

Mudryk Z. J., Perliński P., Skórczewski P., Wielgat M., Zdanowicz M.

Oceanological and Hydrobiological Studies

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2013

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Vol. 42, No. 3

324--331

EN

The abundance of actinomycetes, filamentous fungi and yeasts in the marine epipsammon habitat and their spatial distribution were studied with conventional plating techniques in two marine beaches (Ustka and Czołpino, southern Baltic Sea) which are characterized by different anthropic pressure levels. Actinomycetes constituted the predominant group of studied microorganisms, while the least numerous were yeasts in the sand of both studied beaches. On both of the beaches researched in this study, the amounts of accumulated actinomycetales, fungi and yeasts were similar. When analyzing the distribution of the microflora along the horizontal beach profiles we found significant differences. In the sand collected along the profile perpendicular to the shoreline in Ustka and Czołpino beaches, the highest numbers of actinomycetes, filamentous fungi and yeasts were noted in the samples from the dune and the lowest in those from the subtidal zone and waterline. Generally, higher numbers of studied microorganisms were observed in the surface than in the subsurface sand layer. The occurrence of actinomycetes, filamentous fungi and yeasts showed considerable seasonal variation.

15

Struktury ekologiczne zespołu makrofaulingu wschodniego wybrzeża Zatoki Pomorskiej (południowy Bałtyk) w 2008 roku na podłożach antropogenicznych

Rosińska B, Chojnacki J C, Klej K, Kowalewska M, Polońska J

Inżynieria Ekologiczna

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2013

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Nr 35

60--68

PL

W roku 2008 prowadzono obserwacje nad zgrupowaniami organizmów poroślowych Zatoki Pomorskiej. Wyznaczono stanowiska w Międzyzdrojach, Niechorzu oraz Kołobrzegu. Próbki organizmów pobierano z filarów molo, ostróg oraz gwiazdobloków z falochronów w każdej miejscowości. Materiał biologiczny pobrano wiosną (11 maja 2008), latem (27 lipca 2008) oraz wczesną jesienią (14 września 2008). Dokonano analizy jakościowej i ilościowej zebranych organizmów bezkręgowych.

EN

In 2008, observations carried out on groups of biofauling organisms Pomeranian Bay. Appointed position in Międzyzdroje, Kołobrzeg and Niechorze. Samples of organisms were collected from the pillars of the pier, wooden spurs and conctrte starblocks as part of the breakwaters in each village. The biological material has been collected in the spring (11 May 2008), summer (July 27, 2008) and early autumn (September 14, 2008). There have been qualitative and quantitative analysis of any invertebrate organisms collected.

16

Development of tools for ecological quality assessment in the Polish marine areas according to the Water Framework Directive. Part IV - preliminary assessment

Osowiecki A., Łysiak-Pastuszak E., Kruk-Dowgiałło L., Błeńska M., Brzeska P., Kraśniewski W., Lewandowski Ł., Krzymiński W.

Oceanological and Hydrobiological Studies

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2012

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Vol. 41, No. 3

1-10

EN

A set of classification methods was developed for the Polish coastal and transitional waters regarding the biological quality elements – phytoplankton, macrophytes and macroinvertebrates as required by the EU Water Framework Directive. Mean summer chlorophyll-a and total summer biomass of phytoplankton were proposed as indicators in the phytoplankton assessment. Macrophytes were assessed by the Macrophyte Quality Assessment Index, including biomass and percent bottom coverage of the selected taxa. Macroinvertebrate assessment was based on a biotic index comprising abundance, dominance structure, taxonomical richness and species sensitivity/tolerance to eutrophication. A preliminary assessment of the ecological status revealed that the coastal and transitional waters failed to reach a "good" ecological status.

17

Variability of temperature and salinity over the last decade in selected regions of the southern Baltic Sea

Rak D., Wieczorek P.

Oceanologia

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2012

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No. 54 (3)

339-354

EN

Changes in the basic physical properties of selected areas of the Baltic Proper were analysed on the basis of the results of a 12-year series of high-resolution measurements collected during cruises of r/v "Oceania". The high-resolution CTD sections covered three main basins: the Bornholm Basin, Słupsk Furrow and Gdańsk Basin. Positive temperature trends of 0.11 and 0.16C year-1 were observed in the surface and deep layers respectively. The salinity trend was also positive. The rise in the air temperature has probably caused the increase in surface water temperature, while advection has been of greater significance in the deep layer. The increase in salinity coincides with the more frequent occurrence of small and medium-size inflows through the Danish Straits, even though large inflows are evidently less frequent than used to be the case. The seasonal variability of temperature in the water column was analysed. The phase shift in the seasonal evolution with depth is described. The maximum temperature shift in the waters investigated varies from 32 to 38 days.

18

Holocene evolution of the Pomeranian Bay environment, southern Baltic Sea

Kostecki R., Janczak-Kostecka B.

Oceanologia

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2011

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No. 53 (1-TI)

471-487

EN

This article focuses on the diatom assemblages and geochemical composition of sediment cores retrieved from the Pomeranian Bay. We also discuss similarities and differences in the diatom assemblages and the palaeogeographic development of nearby regions. Our main objective was to determine the characteristics and rate of the Littorina transgression in the Pomeranian Bay area. Sediments were divided into units based on differences in the distribution of diatom ecological groups and in geochemical ratios, such as Mg/Ca, Na/K and Fe/Mn. This study identified lacustrine sediments deposited during the time of the Ancylus Lake. This lacustrine-period sedimentation took place in a shallow lake under aerobic conditions. The record of the onset of marine environment dates to 8900-8300 cal BP and corresponds to the Littorina transgression. After about 8300 cal BP, sedimentation took place in a deeper marine environment with higher biogenic production and anaerobic conditions. The abrupt appearance of marine diatom species and increased geochemical salinity indicators reflect the large impact of the Littorina transgression on the Pomeranian Bay environment.

19

Analysis of 50-year wind data of the southern Baltic Sea for modelling coastal morphological evolution - a case study from the Darss-Zingst Peninsula

Zhang W., Harff J., Schneider B.

Oceanologia

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2011

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No. 53 (1-TI)

489-518

EN

High-resolution wind series in the southern Baltic Sea for the period of 1958-2007 are analysed to generate representative climate input conditions for a multi-scale morphodynamic model to simulate decadal-to-centennial coastline change. Four seasonal wind classes, each characterized by a predominant distribution of wind direction and speed, are derived from statistical analysis. Further calibration of this statistical description is done by sensitivity studies of the model to generate similar coastline changes of the Darss-Zingst peninsula as the measured data for the last century. The coastline change of this area is then projected for the next 300 years based on four different climate scenarios, through which impacts of accelerated sea level rise and storm frequency on the long-term coastline change are quantified.

20

Diatomological and geochemical evidence of littorina transgression in Pomeranian Bay, Southern Baltic Sea

Kostecki R., Janczak-Kostecka B.

Studia Quaternaria

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2010

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Vol. 27

27-33

EN

This article presents results of the analysis of 3 sediment cores taken from the bottom of Pomeranian Bay, southern Baltic Sea. These results are part of a larger project that aims to determine the characteristics and rate of the Atlantic marine ingression in the Pomeranian Bay area. The main geochemical elements and diatom assemblages from the cores were identified, revealing lacustrine sediments deposited during the time of Ancylus Lake and marine sediments deposited during the Littorina transgression. Distinct changes in the geochemical composition and diatom assemblages suggest that the Littorina transgression had a very large impact on the environment of Pomeranian Bay.