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Wyświetlanie 1-15 z 76
Tytuł:
A contribution to the knowledge of Arctic zooplankton diurnal variability (Kongsfjorden, Svalbard)
Autorzy:
Walkusz, Wojciech
Kwaśniewski, Sławomir
Dmoch, Katarzyna
Beszczyńska-Möller, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2051849.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Kongsfjorden
zooplankton
fjords
diurnal variability
Źródło:
Polish Polar Research; 2007, 1; 43-56
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new predatory cladoceran Cercopagis (Cercopagis) pengoi (Ostroumov 1891) in the Gulf of Gdańsk
Autorzy:
Bielecka, L.
Zmijewska, M.I.
Szymborska, A.
Powiązania:
https://bibliotekanauki.pl/articles/48376.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Cercopagidae
water temperature
crustacean
plankton
Caspian Sea
Baltic Sea
zooplankton
water body
Finland Gulf
new species
Riga Gulf
Gdansk Gulf
Podonidae
Cercopagis pengoi
Opis:
Cercopagis pengoi, a species native to the Ponto-Caspian area, was recorded for the first time in the Baltic Sea in the Gulf of Riga and in the open Gulf of Finland in 1992. Sampling in the shallow coastal area of the western part of the Gulf of Gdańsk at weekly intervals between April 1999 and April 2000 revealed the presence of C. pengoi in the zooplankton community. The species was recorded twice, at densities of 1369 indiv. m−3 on 30 July 1999 and 421 indiv. m−3 on 5 August 1999, when the water temperature was at its maximum, in excess of 21.7◦C and 23.9◦C respectively. C. pengoi had never been recorded in the Gulf of Gdańsk prior to 1999.
Źródło:
Oceanologia; 2000, 42, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A turning point in the development of phytoplankton in the Vistula Lagoon (Southern Baltic Sea) at the beginning of the 21st century
Autorzy:
Kownacka, J.
Calkiewicz, J.
Kornijow, R.
Powiązania:
https://bibliotekanauki.pl/articles/2079096.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
phytoplankton community
zooplankton
multiannual change
nutrient
biomass
Vistula Lagoon
Southern Baltic Sea
21st century
Opis:
Phytoplankton community structure was studied from 2002 to 2016 in the Vistula Lagoon (southern Baltic Sea) in the context of the 2010 shift in its population, as well as the reason for this shift and its environmental impact. This evident shift was indicated by Multidimensional Scaling at the Bray Curtis similarity level of 31%. Before 2010, the primary components of phytoplankton were Cyanobacteria (up to 98% of the biomass, October 2007) and Chlorophyta (40%, July 2002). After 2010, the contribution of Cyanobacteria considerably decreased, and the proportions of other phyla increased. The total phytoplankton biomass positively correlated with phosphorus, and Cyanobacteria biomass with silica. Evident changes were also observed in the seasonal dynamics of phytoplankton. Before 2010, the highest values of biomass occurred in autumn, and were related to high biomass of Cyanobacteria. Higher biomass has been recently reached in spring, during the dominance of Ochrophyta associated with Chlorophyta, Charophyta, and Cryptophyta. Generalised additive models showed a significant decreasing trend of the total phytoplankton biomass, Cyanobacteria, Chlorophyta, and flagellates, suggesting a decrease in eutrophication. This trend is concurrent with a considerable increase in the ratio of zooplankton to phytoplankton biomass since 2010. The increased ratio, however, did not result from elevated zooplankton biomass, but from the drop in phytoplankton biomass. Therefore, the most probable reason for the decrease in phytoplankton biomass was the simultaneous decrease in the concentration of all nutrients. The potential additional impact of filtration by a new alien bivalve Rangia cuneata G. B. Sowerby I, 1832 is also discussed.
Źródło:
Oceanologia; 2020, 62, 4PA; 538-555
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A zooplankton-based study of coastal lakes
Zooplanktonowe badania jezior przymorskich
Autorzy:
Paturej, E.
Powiązania:
https://bibliotekanauki.pl/articles/84905.pdf
Data publikacji:
2009
Wydawca:
Akademia Pomorska w Słupsku
Tematy:
zooplankton
coastal lake
estuary
water body
Polska
coastal zone
Baltic Sea
Lake Sarbsko
Lake Gardno
Lake Wicko
Lake Kopan
Lake Bukowo
Lake Jamno
Lake Resko Przymorskie
Lake Liwia Luza
Lake Koprowo
Lake Wicko Wielkie
marine organism
freshwater organism
Opis:
Numerous brackish estuarine water bodies are situated in the Polish Baltic Coastal Zone, including smaller and bigger lakes like Sarbsko, Łebsko, Gardno, Wicko, Kopań, Bukowo, Jamno, Resko Przymorskie, Liwia Łuża, Koprowo and Wicko Wielkie. Despite a similar genesis and geomorphological type, these lakes are characterized by different hydrological and hydrochemical conditions, determined by the predominance of terrestrial or marine factors. The origin of Polish coastal lakes and transboudary water bodies is closely related to the history of the Baltic Sea and the last glaciation. Coastal brackish waters have been inhabited by both marine and freshwater organisms.
Pobrzeża Bałtyku obfitują w liczne zbiorniki słonawo-wodne o charakterze estuariów. Należą do nich mniejsze lub większe jeziora: Sarbsko, Łebsko, Gardno, Wicko, Kopań, Bukowo, Jamno, Resko Przymorskie, Liwia Łuża, Koprowo i Wicko Wielkie. Mimo niejednokrotnie podobnej genezy i typu geomorfologicznego, jeziora te charakteryzują się bardzo rożnym układem stosunków hydrologicznych i hydrochemicznych, ukształtowanych w wyniku przewagi czynnika lądowego lub morskiego. Geneza jezior przymorskich i akwenów transgranicznych na polskim wybrzeżu jest ściśle związana z historią Morza Bałtyckiego i zlodowaceniem skandynawskim. Przybałtyckie wody słonawe zostały zasiedlone zarówno przez organizmy pochodzenia morskiego, jak i słodkowodnego.
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2009, 13 part II
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Abundance and species composition of plankton in the Gulf of Gdańsk near the planned underwater outfall of the Gdańsk-Wschód (Gdańsk-East) sewage treatment plant
Autorzy:
Zmijewska, M.I.
Niemkiewicz, E.
Bielecka, L.
Powiązania:
https://bibliotekanauki.pl/articles/48867.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
biomass
abundance
plankton
underwater outfall
Baltic Sea
phytoplankton
Gdansk city
coastal area
treatment plant
zooplankton
Gdansk Gulf
Vistula River
distribution
Opis:
The aim of this paper is to determine the current biological state of life in the pelagic zone of the Gulf of Gdańsk in relation to the planned start-up of an underwater outfall which will discharge sewage from the Gdańsk–Wschód (Gdańsk–East) sewage treatment plant. The plankton material was collected during two research cruises in July and October 1998. The samples were taken at 15 stations in four profiles located near Wyspa Sobieszewska (Sobieszewo Island), perpendicular to the coastline. Both the taxonomic and numerical structure of phytoplankton and zooplankton were typical of the coastal area of the Gulf of Gdańsk. The species diversity depends on hydrological conditions, mainly input from the River Wisła (Vistula). The abundance and biomass of phytoplankton in 1998 were several times lower than in 1994 and 1995 in the area off Górki Wschodnie, the profile located closest to the planned construction site. This could have been caused by generally lower temperatures in 1998 in comparison to previous years. In the investigated area only traces of algal eutrophication indicator species were noted. However, potentially toxic species were confirmed and were most abundant near the Wisła mouth. The highest concentrations of pelagic fauna occur in the shallowest area closest to the shoreline. Long-term observations of the dynamics of the variations in abundance and species composition indicate the increasing significance of one particular species – Acartia bifilosa.
Źródło:
Oceanologia; 2000, 42, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustically measured diurnal vertical migration of fish and zooplankton in the Baltic Sea - seasonal variations
Autorzy:
Szczucka, J.
Powiązania:
https://bibliotekanauki.pl/articles/48748.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
zooplankton
fish
temperature
acoustic measurement
marine organism
physical structure
diurnal migration
vertical migration
seasonal variation
water
salinity
Baltic Sea
Opis:
Acoustic measurements were conducted at different seasons in the last five years at a fixed point of the Baltic Sea at a frequency 30 kHzcon currently with temperature and salinity sampling. Echosounding records were used to determine the seasonal and diurnal migration patterns of scattering layers in accordance with thermohaline conditions. Different seasonal patterns of nocturnal aggregations of organisms dependent on the temperature gradient in the thermocline were found. This paper illustrates the diurnal distributions of sound scattering layers and analyses the way they are linked to the physical structure of the water.
Źródło:
Oceanologia; 2000, 42, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Activation of the operational ecohydrodynamic model (3D CEMBS) – the ecosystem module
Autorzy:
Dzierzbicka-Glowacka, L.
Janecki, M.
Nowicki, A.
Jakacki, J.
Powiązania:
https://bibliotekanauki.pl/articles/47755.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Baltic Sea
ecosystem model
3D CEMBS model
Baltic ecosystem
ecohydrodynamic model
chlorophyll a
phytoplankton
nutrient
zooplankton
oxygen
hydrodynamic parameter
Źródło:
Oceanologia; 2013, 55, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An acoustic study of zooplankton diel vertical migration in the Black Sea
Autorzy:
Pezacki, P. D.
Gorska, N.
Soloviev, V.
Powiązania:
https://bibliotekanauki.pl/articles/332185.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
hydroacoustics
backscattering
ADCP
velocity of zooplankton
Opis:
Reliable, rapid and non-invasive techniques are important for the monitoring of the ecosystem of the semi-enclosed Black Sea, especially sensitive to the human impact. Hydroacoustic techniques meet these requirements. In the study, the ADCP data (volume backscattering strength and water velocities), collected in the north-east part of the Black Sea in October 2014, were used to understand some biotic and abiotic processes in the environment. The study was motivated by the fact that the used ADCP mounted on the autonomous (moving vertically) platform provided measurements with significantly higher spatial resolution that it was in the previous hydroacoustical studies of Black Sea ecosystem. The main objective of the analysis was to determine the velocity of zooplankton diel vertical migration and understand the processes responsible for the variability of the volume backscattering strength.
Źródło:
Hydroacoustics; 2017, 20; 139-148
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antarctic neritic zooplankton community (Admiralty Bay, King George Island, South Shetland Islands)
Autorzy:
Kittel, Wojciech
Siciński, Jacek
Żmijewska, Maria I.
Bielecka, Luiza
Błachowiak-Samołyk, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2052409.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic
Admiralty Bay
diversity
zooplankton
Źródło:
Polish Polar Research; 2001, 22, 1; 11-33
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Baltic herring prey selectively on older copepodites of Eurytemora affinis and Limnocalanus macrurus in the Gulf of Riga
Autorzy:
Livdane, L.
Putnis, I.
Rubene, G.
Elferts, D.
Ikauniece, A.
Powiązania:
https://bibliotekanauki.pl/articles/48687.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
herring
Clupea harengus membras
zooplankton
selective feeding
condition factor
Riga Gulf
Copepoda
Limnocalanus macrurus
Eurytemora affinis
Źródło:
Oceanologia; 2016, 58, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biotic interactions, energy pathways and trigger factors of ecosystem dynamics in shallow saline lakes
Autorzy:
Golubkov, Sergei
Golubkov, Mikhail
Balushkina, Evgenia
Litvinchuk, Larisa
Powiązania:
https://bibliotekanauki.pl/articles/470793.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
saline lakes
primary production
secondary production
zooplankton
zoobenthos
energy pathways
regime shift
Opis:
Environmental variables, food-web dynamics and energy pathways were investigated in ecosystems of six shallow lakes of the Crimea with salinity ranging from 24 to 340 ‰. There were considerable inter- and intra-annual fluctuations in the abiotic characteristics of the lakes. All the lakes had a very high concentration of total phosphorus in the water (up to 5.6 gP m-3) due to a great influence of the watershed on the lakes. A high level of primary production (up to 14.9 gC m-2 d-1) was found in the most of the lakes. The lowest primary production was found in the most saline lake with a dense population of the filtrator, Artemia urmiana. Grazing benthic energy pathways were dominant at salinities between 24 and 58 ‰. Greater levels of salinity led to a gradual reduction of benthic and increase of planktonic energy pathways. A fast shift from turbid to clear-water regime was observed in one of the lakes, caused by annual variations in weather conditions
Źródło:
Studia Ecologiae et Bioethicae; 2014, 12, 4; 83-113
1733-1218
Pojawia się w:
Studia Ecologiae et Bioethicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterisation of large zooplankton sampled with two different gears during midwinter in Rijpfjorden, Svalbard
Autorzy:
Błachowiak-Samołyk, Katarzyna
Zwolicki, Adrian
Webster, Clare N.
Boehnke, Rafał
Wichorowski, Marcin
Wold, Anette
Bielecka, Luiza
Powiązania:
https://bibliotekanauki.pl/articles/2042145.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Abundance and size
Arctic
Polar night
Rijpfjorden
Vertical distribution patterns
zooplankton
Źródło:
Polish Polar Research; 2017, 38, 4; 459-484
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of the Arctic and Antarctic mesozooplankton in the neritic zone during summer
Autorzy:
Walkusz, Wojciech
Kwaśniewski, Sławomir
Dmoch, Katarzyna
Hop, Haakon
Żmijewska, Maria Iwona
Bielecka, Luiza
Falk-Petersen, Stig
Siciński, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/2052045.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic (Kongsfjorden)
Antarctic (Admiralty Bay)
zooplankton
Copepoda
abundance
biomass
Źródło:
Polish Polar Research; 2004, 25, 3-4; 275-291
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of acoustical and optical zooplankton measurements using an acoustic scattering model: A case study from the Arctic frontal zone
Autorzy:
Szczucka, Joanna
Błachowiak-Samołyk, Katarzyna
Trudnowska, Emilia
Hoppe, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/2046858.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Svalbard
zooplankton
high−frequency echosounding
sound scattering model
Źródło:
Polish Polar Research; 2016, 37, 1; 67-88
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of methods for nocturnal sampling of predatory zooplankters in shallow waters
Autorzy:
Linkowski, T.B.
Kornijow, R.
Kapowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/2078998.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
plankton
zooplankton
predatory species
Neomysis integer
Leptodora kindtii
Cercopagis pengoi
shallow water
Vistula Lagoon
Opis:
The aim of the study was to assess the suitability of a plankton net (diameter of 60 cm, mesh size of 500 μm) and a column sampler (length of 200 cm, diameter of 5 cm) for estimating the density of zooplankton predatory species (Neomysis integer, Leptodora kindtii, Cercopagis pengoi). Nocturnal sampling was performed once a month (May—November 2018) in the Vistula Lagoon (southern Baltic) in the range depth of 1.3—3.6 m. Statistical analysis indicated no significant differences between the N. integer and C. pengoi density estimated by the two sampling gears. In the case of L. kindtii, the mean density obtained by the column sampler was higher when analyzing all samples together and/or deep-water samples only (p < 0.02). However, no such differences were found at shallow stations i.e. up to ca. 2 m in depth. It was assumed that the more suitable sampling equipment for estimating zooplankton abundance in a shallow, well-mixed transitional (brackish) basin is the column sampler. This type of gear, so far used mainly for sampling of micro and mesozooplankton, allows the simultaneous nocturnal collection of the entire zooplankton size spectrum, including representatives of large predatory species. The suitability of light traps for qualitative studies of zooplankton species responding positively to light under the high turbidity of the Vistula Lagoon was also investigated. The traps proved to be most useful for N. integer (100% frequency), and much less for L. kindtii (46.2%) and C. pengoi (27.3%).
Źródło:
Oceanologia; 2021, 63, 1; 71-79
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 76

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