Wyniki wyszukiwania - BazTech

1

Wpływ stosowanych praktyk rolniczych na dopływ wód podziemnych oraz azotanów do Zatoki Puckiej

Potrykus Dawid

Przegląd Geologiczny

|

2024

|

Vol. 72, nr 1

15--25

EN

Eutrophication of marine baśni associated with submarine groundwater discharge is currently one of the most important challenges in modern coastal hydrogeology, and is classified as a serious global environmental problem. Aparticular source of groundwater pollution is agricultural activity, which is commonly carried out in the coastal zone. Research was conducted on arepresentative part of the Bay of Puck watershed, dominated by agriculturall anduse. The geological setting of the study area is heterogeneous, which has a significant influence on groundwater flow and occurrence in the multi-aquifer hydrosystem, draining into Puck Bay. The impact of agricultural practices on groundwater and nitrate discharge to the Puck Bay was determined, byan integrated modeling approach, developed using combination of the SWAT, MODFLOW-NWT and MT3DMS codes. Spatial and seasonal variations of the N-NO3 load leached from the soil profile and the infiltration of precipitation are convergent with observed trends in the discharge of groundwater and N-NO3 loads into Puck Bay. The simulations show that 1,355.13 m3/h of ground- waterand1.87kg/h (16. 4 t/year) of N-NO3 loadare discharged into Puck Bay from the aquifers analyzed, the majority of which comes froman upper aquifer. The distribution of the values as determined was found to be influenced by agricultural practices, resulting from changes in crop structure, fertilizer management, cultivation methods and grazing.

2

Submarine groundwater discharge into a semi-enclosed coastal bay of the southern Baltic Sea: A multi-method approach

Von Ahn Cátia Milene Ehlert, Dellwig Olaf, Szymczycha Beata, Kotwicki Lech, Rooze Jurjen, Endler Rudolf, Escher Peter, Schmiedinger Iris, Sültenfuß Jürgen, Diak Magdalena, Gehre Matthias, Struck Ulrich, Vogler Susan, Böttcher Michael Ernst

Oceanologia

|

2024

|

Vol. 66 (1)

111-138

EN

The present study aims to understand the impact of submarine groundwater discharge (SGD) on a coastal area with different lithology and degrees of SGD. Sampling campaigns took place in Puck Bay and the Gulf of Gdańsk, southern Baltic Sea encompassing years between 2009 and 2021. The methodological approach combined geophysical characterization of the surface sediments with detailed spatial and temporal (isotope) biogeochemical investigations of pore and surface waters, and was supported by nearshore groundwater and river surveys. Acoustic investigations identified areas of disturbance that may indicate zones of preferential SGD release. The composition of porewater and the differences in the bay's surface waters disclosed SGD as common phenomenon in the study area. Regional SGD was estimated through a radium mass balance. Local estimation of SGD, based on porewater profiles, revealed highest SGD fluxes at the sandy shoreline, but relatively low elemental fluxes. Though SGD was low at the muddy sites corresponding elemental fluxes of nutrients and dissolved carbon exceeded those determined at the sandy sites due to intense diagenesis in the top sediments. SGD appears to be sourced from different freshwater endmembers; however, diagenesis in surface sediments substantially modified the composition of the mixed solutions that are finally discharged to coastal waters. Overall, this study provides a better understanding of the SGD dynamics in the region by a multi-approach and emphasizes the need to understand the processes occurring at the sediment-water interface when estimating SGD.

3

Characteristics of morphodynamic conditions in the shallows of Puck Bay (southern Baltic Sea)

Szymczak Ewa, Rucińska Maria

Oceanological and Hydrobiological Studies

|

2021

|

Vol. 50, No. 2

220--231

EN

Puck Bay is an unusual and thus interesting coastal water region, as it combines two different environments – a lagoon and the sea. They differ from each other in their seabed morphology, salinity, dynamics and water exchange. Their common elements are the extensive shallows and the vicinity of the Hel Peninsula. The shallows of Puck Bay have developed at various stages of its evolution, which began several thousand years ago and continues to this day. They have been shaped by varying morphogenetic factors resulting from changes in sea level and accompanying evolution phases of sand barriers, e.g. washover fans, as well as the intensity and directions of sediment transport. At present, the shallows cover more than 35% of the seabed area and are influenced by hydrodynamic factors and availability of sediments. The study area was divided into five fields, taking into account morphological and genetic criteria as well as recent hydrodynamic conditions. This study provides an updated map with classification and distribution of surface sediments and describes grain size parameters for sediment samples collected in the selected fields. Based on a comprehensive assessment of grain size parameters, lithodynamic equilibrium zones were determined and areas of sediment deposition and redeposition were identified.

4

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

Sokołowski Adam, Jankowska Emilia, Balazy Piotr, Jędruch Agnieszka

Oceanologia

|

2021

|

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.

5

Biodiversity of benthic diatom flora in the coastal zone of Puck Bay (southern Baltic Sea) : a case study of the Hel Peninsula

Witak Małgorzata, Pędziński Jarosław, Oliwa Sandra, Hetko Dominika

Oceanological and Hydrobiological Studies

|

2020

|

Vol. 49, No. 3

304--318

EN

The paper presents the results of the analysis of diatoms from surface sediments (stones, sands) and macroflora (seagrass, macroalgae) collected at 16 sampling sites located along the inner coastal zone of Puck Bay (southern Baltic Sea) along the Hel Peninsula. The main diatom species of epilithon, epipsammon and epiphyton were characterized with respect to their autecological preferences (habitat, salinity, trophic status, saprobity). Three groups of diatoms were distinguished with respect to the type of substrate based on the results of benthic flora analysis: diatoms (i) of one type of substrate, (ii) of two types and (iii) those occurring on all types of substrates. Moreover, the distribution of benthic diatom communities indicates ecological differences in the study area. Marine and brackish-water species were observed in large numbers in the coastal zone of the Outer Puck Bay, whereas freshwater flora occurred with a higher frequency in the coastal zone of the Puck Lagoon. The content of polysaprobionts and of α-mesosaprobionts indicates that the region of the Hel Tip is highly eutrophicated and very polluted. The coast in the vicinity of Kuznica is less polluted, whereas the best environmental conditions are found in the Jurata–Jastarnia region, as evidenced by the frequency of diatoms that are β-mesosaprobionts.

6

Wstępna ocena wielkości stężeń związków azotu i fosforu odprowadzanych z wodami powierzchniowymi do Zatoki Puckiej z terenu gminy Puck

Wojciechowska Ewa, Matej-Łukowicz Karolina, Nawrot Nicole, Gajewska Magdalena, Obarska-Pempkowiak Hanna

Technologia Wody

|

2019

|

Nr 4 (66)

14--21

PL

Nawozy sztuczne stosowane w rolnictwie negatywnie wpływają na jakość wód, zarówno powierzchniowych, jak i podziemnych. Zatoka Pucka jest szczególnie narażona na eutrofizację spowodowaną napływem substancji odżywczych, ponieważ jest otoczona terenami intensywnie wykorzystywanymi w rolnictwie. Na wybrzeżu znajduje się także wiele ośrodków turystycznych. Strumienie i rzeki łatwo przenoszą ładunek azotu i fosforu do morza. W ramach projektu WaterPuck, finansowanego przez Narodowe Centrum Badań i Rozwoju (NCBiR), badano jakość rzek i strumieni płynących przez terytorium Gminy Puck i wpadających do Zatoki Puckiej. Były to: Reda, Kanał Łyski, Kanał Mrzezino, Gizdepka, Potok Błądzikowski, Płutnica i Kanał Młyński. Badane rozpoczęto w lipcu 2017 r., a próbki wody są pobierane co 3-4 tygodnie pobliżu ujść strumieni. Mierzone są stężenia związków azotu (amoniak, azotan(III) i azotan(V)) oraz fosfor ogólny i fosforany. Regularne monitorowanie jakości strumieni umożliwia ocenę sezonowych zmian stężeń składników odżywczych, a także ich rozmieszczenia przestrzennego. Stworzy to podstawę do śledzenia zależności między użytkowaniem gruntów i praktykami rolniczymi a ładunkiem składników odżywczych zrzucanych do Zatoki Puckiej z niepunktowych źródeł zanieczyszczeń. Wstępne wyniki wskazują na znaczące sezonowe zmiany stężeń zanieczyszczeń, prawdopodobnie związane z harmonogramem prac rolniczych. Kolejna część projektu badawczego skupi się na identyfikacji obszarów przyczyniających się do zanieczyszczenia strumieni. Oceniane będą zmiany stężeń składników pokarmowych podczas intensywnych opadów deszczu. Wyniki będą podstawą do modelowania transportu składników pokarmowych wodami powierzchniowymi w gminie Puck.

EN

The ferilizers used in agriculture negatively affect the surface and groundwater quality. The Bay of Puck is a semi-closed part of the Gulf of Gdańsk, which is particularly vulnerable to eutrophication caused by the inflow of nutrient substances. The Bay is surrounded by the lands intensively used in agriculture. Also a number of touristic resorts is located on its coast. The streams and rivers carry the load of nitrogen and phosphorus to the sea. Within the project WaterPuck, financed by the National Centre of Research and Development in Poland (NCBiR), the quality of rivers and streams flowing through the territory of the Puck Community and discharging to the Bay of Puck is being researched. The quality of seven streams: Reda, Kanał Łyski, Kanał Mrzezino, Gizdepka, Potok Błądzikowski, Płutnica and Kanał Młyński is investigated. The researched was started in July 2017. The samples of water are collected every 3-4 weeks at sampling points located close to the streams estuaries. The concentrations of nitrogen species (ammonia, nitrate III and nitrate V) as well as total phosphorus and phosphates are measured. The regular monitoring of streams quality make it possible to assess the seasonal changes of nutrients concentrations as well as their spatial distribution. This will provide the basis for tracking the relationships between the land use and agricultural practices and the load of nutrients discharged to Bay of Puck from non-point sources of pollution. The preliminary results indicate quite significant seasonal variations of pollutants concentrations, probably associated to the time schedule of agricultural practices. The highest concentrations of nutrients where present in sampling points located on Błądzikowski Potok, Kanał Mrzezino as well as Gizdepka – all flowing through arable lands. Concentrations of nitrates V in Błądzikowski Stream varied from 2,27 to 7,55 mg NO3-/dm3, while the concentrations of total phosphorus – from 0,24 to 0,45 mg P/dm3. The next part of the research project is going to focus on identification of areas contributing to the streams pollution. The changes of nutrients concentrations during intensive rainfalls will be evaluated. The results will provide the basis for modelling of nutrient transport with surface waters in the Puck Community.

7

Analysis of ice conditions in the Baltic Sea and in the Puck Bay

Dyrcz C.

Zeszyty Naukowe Akademii Marynarki Wojennej

|

2017

|

R. 58 nr 3 (210)

13--31

EN

The paper presents results of research based on analysis of ice conditions in the Baltic Sea and in the Puck Bay. Analyses are concerned on the last century the maximum ice extents in the Baltic Sea (1915–2015) and ice conditions in the Puck Bay (1986–2005). Ice conditions in the Baltic Sea are generally of average intensity and depend mainly on the type of winters (mild, average/normal and severe), however, the Baltic bays and gulfs cover the sea ice almost every year. The average ice extent in the Baltic Sea during typical winters, the ice extent in the Baltic Sea during winters in years from 1915 to 2015 and the average time limits the occurrence of the first ice, number of days with ice, ice thickness, terms the disappearance of the last ice in the Puck Bay together with examples of ice forms are presented in this paper. The phenomenon of ice have a significant impact on human activities in the sea, have an effect on weather and climate, plant and animal life, fishery and ports activities and the safety of navigation.

PL

W artykule przedstawiono wyniki badań opartych na analizie warunków występowania lodu na Morzu Bałtyckim i w Zatoce Puckiej. Analizy dotyczą maksymalnego zasięgu pokrywy lodowej w ostatnim stuleciu na Morzu Bałtyckim (1915–2015) i warunków występowania lodu na Zatoce Puckiej w latach 1986–2005. Zlodzenie Morza Bałtyckiego ma zazwyczaj umiarkowaną intensywność i zależy głównie od rodzaju zim (łagodna, średnia/normalna i surowa), jednakże prawie każdego roku lód morski pokrywa zatoki i zalewy bałtyckie. W artykule zobrazowano średni zasięg występowania lodu na Morzu Bałtyckim podczas typowych zim, wielkości obszarów zlodzenia w latach 1915–2015, średni czas początku i końca występowania lodu, liczbę dni z lodem oraz grubość lodu na Zatoce Puckiej wraz z przykładami rodzaju lodu. Zjawisko zlodzenia ma znaczący wpływ na działalność człowieka na morzu, wpływa na pogodę i klimat, życie roślinne i zwierzęce, rybołówstwo oraz funkcjonowanie portów i bezpieczeństwo nawigacji.

8

Indicators for the assessment of a degraded marine ecosystem as illustrated by the example of postdredging pits in the Puck Bay

Opioła R.

Biuletyn Instytutu Morskiego w Gdańsku

|

2017

|

Vol. 32, No. 1

115--122

EN

Between 1989 and 1996, almost as much as 7 000 000 m3 of sand was excavated from seabed of the Puck Bay for the purposes of protection of shores of the Hel Peninsula. Remnants of these activities are five pits of varied cubature and depth, which are several times bigger than natural depths. All studies performed so far in the area of the pits indicated that a permanent degradation of environment took place at the sites. Between 2007 and 2008, complex yearly environmental studies were performed in order to establish bases and conditions for actions aiming at rehabilitation of the degraded areas of the Puck Bay. As a result, measurements and surveys of 58 parameters, both chemical and biological ones, were carried out. The aim of those analyses was to point to the parameters which, irrespective of date of study performance, will enable an assessment of seabed degradation resulting from the dredging works carried out. For this purpose, the Wilcoxon’s test for dependent samples was used. 23 parameters used in statistical tests were studied throughout the whole year. The performed statistical analysis indicated that 7 out of the 23 analysed parameters meet the above-mentioned condition, and they may be used in the future in diagnosing state of environment affected by anthropogenic interference with seabed areas.

PL

W latach 1989–1996 z dna Zatoki Puckiej, na potrzeby ochrony brzegu Półwyspu Helskiego, wyczerpano prawie 7 000 000 m3 piasku. Pozostałością tych działań jest pięć wyrobisk o różnej kubaturze i głębokości, przekraczającej kilkukrotnie głębokości naturalne. Wszystkie dotychczasowe badania prowadzone w obrębie wyrobisk wskazują, że w tych miejscach doszło do trwałej degradacji środowiska. W latach 2007–2008 przeprowadzono kompleksowe, całoroczne badania środowiskowe, których celem było określenie podstaw i uwarunkowań przeprowadzenia działań rekultywacyjnych, zdegradowanych obszarów Zatoki Puckiej. W ich wyniku wykonano pomiary i badania 58 parametrów, zarówno chemicznych, jak i biologicznych. Celem niniejszych analiz było wskazanie takich parametrów, które niezależnie od czasu prowadzenia badań, pozwolą określić degradację dna morskiego, wynikającą z przeprowadzonych prac czerpalnych. W tym celu użyto testu Wilcoxona dla par zależnych. Do testów statystycznych wykorzystano 23 parametry, które były badane przez cały rok. Przeprowadzona analiza statystyczna wykazała, że 7 spośród 23 analizowanych parametrów spełnia wskazany wyżej warunek i mogą być one wykorzystane w przyszłości do diagnozowania stanu środowiska, po antropogenicznej ingerencji w obszarach dna morskiego.

9

Mixing of brine waste in Puck Bay (the south Baltic Sea) in the light of in-situ measurements

Robakiewicz M.

Oceanological and Hydrobiological Studies

|

2016

|

Vol. 45, No. 1

42--54

EN

In the north-eastern part of Poland, the underground gas stores are being constructed by diluting salt deposits. Brine, a by-product of the technology applied, is discharged into the coastal waters of the south Baltic Sea by a system of diffusers. To assess the intensity of brine mixing in the near-field of the discharge installation, a monitoring program was carried out. The results demonstrated that under the mildly dynamic conditions of Puck Bay, the discharge of brine (saturation 250 kg m-3, discharge 300 m3 h-1) leads to salinity excess below 0.5 PSU. For parameters of a real brine discharge, the dilution coefficient estimated by formulas derived from analytical solutions, predictive models and laboratory experiments for stagnant water conditions, varied in the range of 123÷360. The dilution coefficient value estimated on the basis of measurements was 1.27÷3.72 times higher than its value obtained by the use of predictive models, while estimated by formulas obtained from laboratory experiments was in the range of 1.41÷2.26 of the dilution coefficient based on measurements.

10

First record of rare fish snake blenny Lumpenus lampretaeformis (Walbaum 1792) in the Puck Bay

Pieckiel P., Wawrzyniak W.

Biuletyn Instytutu Morskiego w Gdańsku

|

2016

|

Vol. 31, No. 1

7--10

EN

Snake blenny was noted for the first time in the Puck Bay [see Fig.1] on depth 42.1 m. This part of the Bay is connected with Gdańsk, deep with the maximum depth of 118 m. Snake blenny is probably a post glacial relict fish species in the Baltic. It prefers comparatively deep waters between 30 m to 120 m, as those water depths probably holds the suitable habitat for the fish for spawning and feeding life. However, considering snake blenny’s low tolerance for oxygen deficiency, which may occur in deepest parts of the Gulf of Gdansk, this species may be endangered in this area.

PL

Taśmiak długi Lumpenus lampretaeformis (Walbaum 1792) został odnotowany po raz pierwszy w wodach Zatoki Puckiej na głębokości 42,1 m (rys 1.) w bezpośrednim sąsiedztwie Głębi Gdańskiej gdzie maksymalna głębokość dochodzi do 118 m. W Bałtyku ryba ta jest prawdopodobnie reliktem pochodzenia polodowcowego. Siedliskiem taśmiaka długiego, zarówno dla celów rozrodczych jak i żerowiskowych, w Bałtyku są wody w zakresie głębokości od 30 m do 120 m. Biorąc pod uwagę wrażliwość tego gatunku na niedobory tlenowe, które występują w Bałtyku w szczególności w najgłębszych partiach wód włączając tu Głębię Gdańską, jego siedliska mogą być zagrożone.

11

The three-spined stickleback (Gasterosteus aculeatus) infection with Schistocephalus solidus in Hel marina (Puck Bay, Baltic Sea, Poland)

Mačát Z., Bednařík A., Rulík M.

Oceanological and Hydrobiological Studies

|

2015

|

Vol. 44, No. 1

11--17

EN

Parasitic relations between animals are very common in wild nature. In this paper, we studied levels of infection in three-spined stickleback with plerocercoids of Schistocephalus solidus from Puck Bay (Baltic Sea, Poland). The total prevalence of infection was 54.2%, while proportion of infected individuals was significantly higher for females than for males. The body width was found to be significantly positively correlated with the number and the weight of parasites. In spite of the increasing deterioration of the Baltic Sea ecosystem by excessive eutrophication and hypoxia, lower prevalence of infection compared to previous published data indicates that there are likely other factors than pollution affecting the life cycle of parasites and the level of parasitism.

12

Observations of presumable groundwater seepage occurrence in Puck Bay (the Baltic Sea)

Matciak M., Bieleninik S., Botur A., Podgórski M., Trzcińska K., Dragańska K., Jaśniewicz D., Kurszewska A., Wenta M.

Oceanological and Hydrobiological Studies

|

2015

|

Vol. 44, No. 2

267--272

EN

We report the results of recent field measurements of seawater thermohaline structure and transparency carried out in early summer 2014 in Puck Bay. Near-bottom, less saline waters occurred almost in the entire study area. Their occurrence in the shallow part of Puck Bay was accompanied by an increase in the seawater transparency. The most likely explanation of these observations is a submarine fresh groundwater discharge.

13

Changes in the parasite communities as one of the potential causes of decline in abundance of the three-spined sticklebacks in the Puck Bay

Morozińska-Gogol J.

Oceanologia

|

2015

|

No. 57 (3)

280--287

EN

In the past, the Puck Bay was a very important area for freshwater and marine ichthyofauna. Due to anthropogenic degradation of the environment, especially eutrophication, commercially important fish species have lost spawning grounds and their distribution and abundance fell significantly. A sharp increase in the number of Gasterosteus aculeatus was recorded since the mid-seventies of the twentieth century. Sticklebacks had become the dominant species and were distributed evenly in the coastal waters. But now, the numbers of sticklebacks are decreasing. In this paper, the parasite community of the three-spined sticklebacks was studied. The values of parasitological indices are counted and compared with previous data. Possible consequences of the harboured parasites for body condition, fecundity and changes in host behaviour are described. Also the other possible reasons for the current reduction in the number of sticklebacks in the Puck Bay are analyzed.

14

Konsultacje społeczne jako element planowania ochrony obszarów Natura 2000 na przykładzie Zatoki Puckiej

Michałek M. A., Kruk-Dowgiałło L.

Inżynieria Ekologiczna

|

2015

|

Nr 42

95--104

PL

Natura 2000 jest formą ochrony przyrody wprowadzoną w Polsce w 2004 r. Zgodnie z obowiązującym prawem konieczne jest zachowanie lub przywrócenie tzw. „właściwego stanu ochrony” gatunków i siedlisk występujących na obszarach Natura 2000, poprzez wprowadzenie odpowiednich „środków ochronnych”. Takimi środkami w przypadku obszarów zlokalizowanych na morzu są plany ochrony. Proces przygotowania dokumentów dla obszarów zlokalizowanych w rejonie Zatoki Puckiej tj.: PLB220005 Zatoka Pucka i PLH220032 Zatoka Pucka i Półwysep Helski, rozpoczął się w 2011 r. i trwał 38 miesięcy a jednym z jego istotnych elementów były konsultacje społeczne. Celem pracy jest omówienie roli konsultacji społecznych jako elementu planowania ochrony obszarów Natura 2000 w rejonie Zatoki Puckiej oraz analiza konfliktów pomiędzy określonymi celami ochrony i działalnością człowieka, które wymagały wypracowania kompromisowych rozwiązań. Niespodziewanie szeroki udział społeczeństwa w dyskusji dotyczącej zapisów w projektach planów ochrony, choć był procesem trudnym, niewątpliwie przyniósł wiele korzyści zarówno społecznych, jak i środowiskowych.

EN

Natura 2000 network was implemented in Poland in 2004. Under current legislation, it is required to preserve or restore „favourable conservation status” of species and habitats within Natura 2000 sites by introducing appropriate „protection measures”. Such measures for marine areas are protection and management plans. Elaboration of that documents for two sites of the Puck Bay area: PLB220005 and PLH220032 started in 2011 and was carried out for 38 months. Public consultations were one of its crucial element. The aim of this paper is to discuss the role of public consultations as a part of the conservation planning process in the Puck Bay area and conflicts analysis. Surprisingly, wide public participation, even though it was a difficult process, undoubtedly brought benefits, on both social and environmental fields.

15

Gelatinous zooplankton – a potential threat to the ecosystem of the Puck Bay (the southern Baltic Sea, Poland)

Olenycz M.

Biuletyn Instytutu Morskiego w Gdańsku

|

2015

|

Vol. 30, No. 1

78--85

EN

Gelatinous zooplankton is a group of organisms, which in recent decades has become one of the most important elements to shape the marine ecosystem. Their growing numbers and spreading to the new marine regions, in combination with the high feeding rate, causes significant changes in the flow of energy in the food webs. The only regularly-occurring gelatinous zooplankton species in the Puck Bay area is scyphozoan Aurelia aurita, most abundant in the summer and fall seasons. As shown in Barz and Hirche’s (2005), Möller’s (1980a), Schneider’s (1989), and Schneider and Behrends’ (1994) studies, the abundance of jellyfish in Bornholm Basin and Kiel Bight was several times lower than that in Puck Bay. Nevertheless, the authors of these studies concluded that the population of A. aurita can significantly reduce mesozooplankton and fish resources by preying on their larvae and eggs. Taking this into account, it is possible that the impact of A. aurita medusae on the Puck Bay ecosystem is even higher than in other parts of the Baltic Sea. Verification of this thesis requires detailed investigation; the scope of which should include investigation of: A. aurita food selectivity and long-term mesozooplankton, and A. aurita medusae abundance. The aim of this study, based on the few data in the literature, is to estimate if the gelatinous zooplankton is also an important element of the .

PL

Zooplankton galaretowaty to grupa organizmów, która w ostatnich dekadach stała się jednym z najważniejszych elementów kształtujących ekosystemy morskie. Ich rosnąca liczebność i rozprzestrzenianie się na nowe akweny w połączeniu z wysokim tempem żerowania, powodują istotne zmiany w przepływie energii w sieciach troficznych. Celem pracy była próba zbadania, na podstawie nielicznych danych literaturowych i własnych danych niepublikowanych, czy zooplankton galaretowaty jest również istotnym elementem ekosystemu Zatoki Puckiej. Jedynym regularnie występującym w tym akwenie gatunkiem z tej grupy zwierząt jest Aurelia aurita, która w miesiącach lata i jesieni występuje w wysokiej liczebności (Olenycz – dane niepublikowane). W przypadku Basenu Bornholmskiego i Zatoki Kilońskiej stwierdzono (Möller 1980a, Schneider 1989, Schneider and Behrends 1994, Barz and Hirche 2005), że liczebność meduz była około kilkukrotnie mniejsza niż w przypadku Zatoki Puckiej. Tym niemniej autorzy tych badań uznali, że populacja tego gatunku może znacząco redukować zasoby mezozooplanktonu i ryb, poprzez żerowanie na ich larwach i ikrze. Potencjalnie więc, wpływ meduz A. aurita Zatoki Puckiej jest większy niż w przypadku innych rejonów Bałtyku. Jednak aby potwierdzić tę tezę należy przeprowadzić kompleksowe badania, które swym zakresem objęłyby długoterminowe analizy wybiórczości pokarmowej meduz A. aurita oraz zmian liczebności mezozooplanktonu i meduz A. aurita.

16

Salinity changes in the Bay of Puck due to brine discharge based on in-situ measurements

Robakiewicz M.

Oceanological and Hydrobiological Studies

|

2014

|

Vol. 43, No. 2

191--199

EN

Brine, a by-product in the process of constructing gas storage caverns in salt deposits, has been discharged into Puck Bay by a system of diffusers since autumn 2010. In-situ measurements taken in the period of October 2010–December 2012 were used to assess salinity changes in the vicinity of the discharge installation. The measured salinity values included two components: the natural, representing salinity in the absence of discharge, and salinity excess due to brine discharge. Owing to the limited number of locations in the Gulf of Gdańsk where the national program of monitoring environmental changes is carried out, it was impossible to determine exactly the natural component. As a consequence, four estimation methods were proposed. A detailed analysis was carried out for the second half of 2012, when parameters of brine were close to the maximum permissible values. It was found that the average salinity excess in the vicinity of the installation rarely reached 0.5 PSU, and the maximum values at individual sites occasionally reached 0.6 PSU. It was shown that the local wind plays an important role in brine mixing with the surrounding environment, however, it is not sufficient to explain the observed salinity patterns.

17

Benthic non-indigenous species among indigenous species and their habitat preferences in Puck Bay (southern Baltic Sea)

Janas U., Kendzierska H.

Oceanologia

|

2014

|

No. 56 (3)

603--628

EN

To date 11 non-indigenous benthic taxa have been reported in Puck Bay (southern Baltic Sea). Five of the 34 taxa forming the soft bottom communities are regarded as non-indigenous to this area. They are Marenzelleria spp., Mya arenaria, Potamopyrgus antipodarum, Gammarus tigrinus and Amphibalanus improvisus. Non-indigenous species comprised up to 33% of the total number of identified macrofaunal taxa (mean 17%). The average proportion of aliens was 6% (max 46%) in the total abundance of macrofauna, and 10% (max 65%) in the biomass. A significant positive relationship was found between the numbers of native taxa and non-indigenous species. The number of native taxa was significantly higher on a sea bed covered with vascular plants than on an unvegetated one, but no such relationship was found for their abundance. No significant differences were found in the number and abundance of non-indigenous species between sea beds devoid of vegetation and those covered with vascular plants, Chara spp. or mats of filamentous algae. G. tigrinus preferred a sea bed with vegetation, whereas Marenzelleria spp. decidedly preferred one without vegetation.

18

Methane flux from sediment into near-bottom water in the coastal area of the Puck Bay (Southern Baltic)

Reindl A. R., Bolałek J.

Oceanological and Hydrobiological Studies

|

2012

|

Vol. 41, No. 3

40-47

EN

This work presents the results of the study on methane emission from the sea bottom in the coastal zone of Puck Bay. The investigations were conducted from June through September 2010 at seven sampling sites located along the Hel Peninsula. The research results indicate that the methane flux rates vary periodically. Methane emission from seabed into near-bottom water in the coastal zone of Puck Bay along the Hel Peninsula ranged from 0.91 mmol m-2 d-1 to 49.15 mmol m-2 d-1.

19

Efficiency of the Methane Fermentation Process of Macroalgae Biomass Originating from Puck Bay

Dębowski M., Grala A., Zieliński M., Dudek M.

Archives of Environmental Protection

|

2012

|

Vol. 38, no. 4

99-107

EN

The aim of the conducted research was to determine the possibilities of using the biomass of macroalgae obtained from Puck Bay during May-September season in biogas production process. Model respirometry chambers were used to determine the amount of produced biogas and examine its quality composition. Depending on the month in which the algal biomass was obtained, the experiments were divided into five stages. In each stage, the effectiveness of the biogas production process was tested for the applied loads in model fermentation chambers in the range from 1.0 kg DOM/m3 ź d to 3.0 kg DOM/m3 ź d. During the experiments it was found that the efficiency of biogas production varied from 205 dm3/kg DOM to 407 dm3/kg DOM depending on the month of the vegetation season and the applied organic matter load in the chamber. Methane content was very high and ranged from 63% to 74%.

PL

Celem prowadzonych badań było określenie możliwości wykorzystania biomasy makroglonów pozyskiwanych z Zatoki Puckiej w okresie od maja do września w procesie wytwarzania biogazu. Do określenia ilości wytwarzanego biogazu oraz zbadania jego składu jakościowego wykorzystano modelowe komory respirometryczne. W zależności od miesiąca, w którym pozyskiwano biomasę glonową eksperymenty podzielono na pięć etapów. W każdym z etapów testowano efektywność procesu biogazowania w zakresie stosowanych obciążeń modelowych komór fermentacyjnych w zakresie od 1,0 kg s.m.o/m3 ź d do 3,0 kg s.m.o./m3 ź d. W trakcie eksperymentów stwierdzono, iż wydajność wytwarzania biogazu kształtowała się w zakresie od 205 dm3/kg s.m.o. do 407 dm3/kg s.m.o. w zależności od miesiąca okresu wegetacyjnego oraz stosowanego obciążenia komory ładunkiem substancji organicznej. Zawartość metanu była bardzo wysoka i mieściła się w granicach od 63% do 74%.

20

Upwelling intrusion into shallow Puck Lagoon, a part of Puck Bay (the Baltic Sea) [commun.]

Matciak M., Nowacki J., Krzymiński W.

Oceanological and Hydrobiological Studies

|

2011

|

Vol. 40, No.2

108-111

EN

In this short communication we present the results of field measurements which show the incidence of waters originating from the deeper layers of Puck Bay in shallow Puck Lagoon. The reason for such a situation is the occurrence of a small-scale upwelling. This phenomenon may play a significant role in shaping the ecosystem conditions of Puck Lagoon, which is unique in terms of its natural values.