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    Tytuł:
    Factors describing the distribution of the zooplankton community in the Gulf of Finland in the context of interactions between native and introduced predatory cladocerans
    Autorzy:
    Pollumae, A.
    Kotta, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/48106.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    zooplankton
    temperature
    mesozooplankton
    Leptodora kindtii
    salinity
    phytoplankton
    distribution
    Cercopagis pengoi
    eutrophication
    Opis:
    Mesozooplankton communities were studied monthly at six sites in the Gulf of Finland during six ice-free seasons. The abundances of different zooplankton taxa were related to temperature, salinity, eutrophication level (total nitrogen and phosphorus), phytoplankton (Chl a) and density of predatory cladocerans, including the non-indigenous Cercopagis pengoi and the native Leptodora kindtii. T he results indicated that variability in the zooplankton communities was correlated not only with predation by mesozooplankton but also with bottom-up effects. Predation by the non-indigenous C. pengoi may significantly affect the dynamics of Cladocera and Rotatoria in the Gulf of Finland during the summer season.
    Źródło:
    Oceanologia; 2007, 49, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Benthic Crustacea and Mollusca distribution in Arctic fjord - case study of patterns in Hornsund, Svalbard
    Autorzy:
    Drewnik, A.
    Weslawski, J.M.
    Wlodarska-Kowalczuk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/48672.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    species distribution
    benthos
    Mollusca
    Crustacea
    distribution
    Arctic fjord
    environmental factor
    benthic species
    bottom water
    water temperature
    Hornsund Region
    Svalbard
    Opis:
    We present the results of species distribution modeling conducted on macrobenthic occurrence data collected between 2002 and 2014 in Arctic fjord – Hornsund. We focus on species from Mollusca and Crustacea taxa. This study investigates the importance of individual environmental factors for benthic species distribution, with a special emphasis on bottom water temperature. It aims to verify the hypothesis that the distribution of species is controlled by low water temperatures in the fjord and that the inner basins of the fjord serve as potential refugia for Arctic species threatened by the climate change-related intensification of warmer water inflows. Our results confirm the importance of bottom water temperature in regulating the presence of benthic fauna in the Hornsund fjord. The distribution of studied species is clearly related to specific water mass – colder (<1°C) or warmer (>1°C); and the preferred temperature regimes seem to be species specific and unrelated to analyzed groups. This study supports the notion that inner basins of the Hornsund fjord are potential refugia for cold water Arctic fauna, while the outer and central basins provide suitable habitats for fauna that prefer warmer waters.
    Źródło:
    Oceanologia; 2017, 59, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distribution of temperature in multicomponent functionally graded multilayered composites
    Rozkład temperatury w wieloskładnikowym wielowarstwowym kompozycie o funkcyjnej gradacji własności efektywnych
    Autorzy:
    Wagrowska, M.
    Szlachetka, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/40251.pdf
    Data publikacji:
    2016
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    temperature
    distribution
    heat conduction
    tolerance modelling
    multicomponent
    functional gradation
    multilayer composite
    material property
    Opis:
    The object of analysis is a heat conduction problem within the frames of tolerance modelling in multicomponent, multilayered composites with functional gradation of effective material properties. The equations of proposed model for considered composites are partial differential equations with slowly-varying coefficients. The one-dimensional, stationary problem of heat conduction in direction perpendicular to layers will be analysed.
    Przedmiotem rozważań jest modelowanie tolerancyjne przewodnictwa ciepła w wieloskładnikowych wielowarstwowych kompozytach o funkcyjnej gradacji własności efektywnych. Zaproponowane równania modelu dla analizowanych kompozytów są równaniami różniczkowymi cząstkowymi z wolnozmiennymi współczynnikami. Wyznaczono rozkład przybliżonej temperatury dla jednowymiarowego stacjonarnego zagadnienia przewodnictwa ciepła w kierunku prostopadłym do uwarstwienia.
    Źródło:
    Acta Scientiarum Polonorum. Architectura; 2016, 15, 1
    1644-0633
    Pojawia się w:
    Acta Scientiarum Polonorum. Architectura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of the North Atlantic Oscillation on the potential distribution areas of Bursaphelencus xylophilus in Europe based on climatological reanalysis data
    Autorzy:
    Somfalvi-Toth, K.
    Keszthelyi, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082798.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Bursaphelencus xylophilus
    distribution
    ECMWF ERA5 reanalysis dataset
    NAO
    pine wood nematode
    temperature
    Opis:
    Pine wood nematode (Bursaphelenchus xylophilus) (Aphelenchida: Parasitaphelencidae) is one of the most harmful agents in coniferous forests. The most important vectors of pine wood nematode are considered to be some Monochamus species (Col.: Cerambycidae), which had been forest insects with secondary importance before the appearance of B. xy- lophilus. However, the continuous spreading of the nematode has changed this status and necessitated detailed biological and climatological investigation of the main European vec- tor, Monochamus galloprovincialis. The potential distribution area of M. galloprovincialis involves those areas where the risk of the appearance of pine wood nematode B. xylophilus is significant. The main objective of our analysis was to obtain information about the in- fluencing effects of North Atlantic Oscillation (NAO) on the potential European range of B. xylophilus and its vector species M. galloprovincialis based on the connection between the mean temperature of July in Europe, the distribution of day-degrees of the vector and the NAO index. Our assessment was based on fundamental biological constants of the nematode and the cerambycid pest as well as the ECMWF ERA5 Global Atmospheric Rea- nalysis dataset. Our hypothesis was built on the fact that the monthly mean temperature had to exceed 20°C in the interest of an efficient expansion of the nematode. In addition, the threshold temperature of the vector involved in the calculations was 12.17°C, while the accumulated day-degree (DD) had to exceed the annual and biennial 370.57°DD for univoltine and semivoltine development, respectively. Our finding that a connection could be found between a mean temperature in July above 20°C and NAO as well as between the accumulated day-degrees and NAO can be the basis for further investigations for a reliable method to forecast the expansion of pine wood nematode and its vector species in a given year.
    Źródło:
    Journal of Plant Protection Research; 2020, 60, 2; 215-219
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applications of Electrical Capacitance Tomography for Research on Phenomena Occurring in the Fluidised Bed Reactors
    Autorzy:
    Porzuczek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/185005.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ECT
    fluidyzacja
    hydrodynamika
    temperatura
    dystrybucja
    electrical capacitance tomography (ECT)
    fluidization
    hydrodynamics
    temperature
    distribution
    application review
    Opis:
    The paper presents a review of current achievements in the Electrical Capacitance Tomography (ECT) in relation to its possible applications in the study of phenomena occurring in fluidised bed reactors. Reactors of that kind are being increasingly used in chemical engineering, energetics (fluidised bed boilers) or industrial dryers. However, not all phenomena in the fluidised bed have been thoroughly understood. This results in the need to explore and develop new research methods. Various aspects of ECT operation and data processing are described with their applicability in scientific research. The idea for investigation of temperature distribution in the fluidised bed, using multimodal tomography, is also introduced. Metrological requirements of process tomography such as sensitivity, resolution, and speed of data acquiring are noted.
    Źródło:
    Chemical and Process Engineering; 2014, 35, 4; 397-408
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monitoring the effect of upwelling on the chlorophyll a distribution in the Gulf of Finland (Baltic Sea) using remote sensing and in situ data
    Autorzy:
    Uiboupin, R.
    Laanemets, J.
    Sipelgas, L.
    Raag, L.
    Lips, I.
    Buhhalko, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/48503.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    spatio-temporal variability
    chlorophyll a
    distribution
    variability
    upwelling
    Baltic Sea
    Finland Gulf
    sea surface temperature
    remote sensing
    spatial distribution
    ecological status
    satellite image
    Opis:
    The spatio-temporal variability of chlorophyl a (Chl a) caused by a sequence of upwelling events in the Gulf of Finland in July–August 2006 was studied using remote sensing data and field measurements. Spatial distributions of sea surface temperature (SST) and Chl a concentration were examined using MODIS and MERIS data respectively. The MERIS data were processed with an algorithm developed by the Free University of Berlin (FUB) for case 2 waters. Evaluation of MERIS Chl a versus in situ Chl a showed good correlation (r2 = 0.67), but the concentration was underestimated. The linear regression for a 2 h window was applied to calibrate MERIS Chl a. The spatio-temporal variability exhibited the clear influence of upwelling events and related filaments on Chl a distribution in the western and central Gulf. The lowest Chl a concentrations were recorded in the upwelled water, especially at the upwelling centres, and the highest concentrations (13 mg m−3) were observed about two weeks after the upwelling peak along the northern coast. The areas along the northern coast of upwelled water (4879 km2) on the SST map, and increased Chl a (5526 km2) two weeks later, were roughly coincident. The effect of upwelling events was weak in the eastern part of the Gulf, where Chl a concentration was relatively consistent throughout this period.
    Źródło:
    Oceanologia; 2012, 54, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-native crab Rhithropanopeus harrisii (Gould, 1984) – a new component of the benthic communities in the Gulf of Gdansk (Southern Baltic Sea)
    Autorzy:
    Hegele-Drywa, J.
    Normant, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/48242.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    mud crab
    Rhithropanopeus harrisii
    non-native species
    seasonal change
    water temperature
    distribution
    Gdansk Gulf
    Baltic Sea
    Źródło:
    Oceanologia; 2014, 56, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distribution of phytoplankton along the thermohaline gradient in the North-Eastern Adriatic channel; winter aspect
    Autorzy:
    Vilicic, D.
    Kuzmic, M.
    Bosak, S.
    Silovic, T.
    Hrustic, E.
    Buric, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/47482.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Adriatic Sea
    chlorophyll
    diatom
    dinoflagellate
    distribution
    nutrient
    oligotrophic water
    phytoplankton composition
    picoplankton
    salinity
    temperature
    thermohaline
    transition zone
    water transparency
    Opis:
    The distribution of phytoplankton and its relation to the hydrographic features in the north-eastern Adriatic was investigated in February 2008. The area of interest included a thermohaline gradient in the channel situated between the coast and the islands lying parallel to the coast. The gradient is controlled by the influx of oligotrophic karstic riverine water at the south-eastern end,subma rine springs in the middle part,an d warmer offshore waters at the north-western end of the channel. The change of temperature and salinity in the estuarine transition zone was accompanied by abundant diatoms and dinoflagellates below the halocline,with dominant chain-forming diatoms (Chaetoceros, Bacteriastrum) in abundances reaching 5×105 cells dm−3. The impact of coastal submarine springs detected by infrared remote sensing resulted in the growth of cyanobacteria in the nitrogen-depleted surface waters. The greater contribution of picoplankton, as well as of nanoplanktonic coccolithophorids and cryptophytes,in the outer channel system indicated their preference for oligotrophic conditions. Flow cytometric counts of nanophytoplankton were 10–30 times greater than inverted microscope counts. Cyanobacteria were about five times more abundant than picoeukaryotes. The study demonstrates how different techniques (remote sensing and in situ investigations) can be useful in understanding the biological and hydrographic set-up in the specific oligotrophic eastern Adriatic coastal environment.
    Źródło:
    Oceanologia; 2009, 51, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of the mercury porosimeter for the evaluation of micropore size distribution in potato extrudates
    Autorzy:
    Jamroz, J.
    Hajnos, M.
    Sokolowska, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/26460.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    moisture
    internal porosity
    porosity
    microstructure
    total porosity
    micropore size
    temperature
    mercury porosimeter
    physical property
    potato starch
    extrudate
    potato
    distribution
    starch product
    extrusion
    Źródło:
    International Agrophysics; 1996, 10, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variability in the distribution of phytoplankton as affected by changes to the main physical parameters in the Baltic Sea
    Autorzy:
    Dzierzbicka-Glowacka, L.
    Jakacki, J.
    Janecki, M.
    Nowicki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/49183.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    3D ecosystem model
    Baltic Sea
    distribution
    ecological system
    ecosystem
    long-term variability
    marine ecosystem
    nutrient
    organic matter
    physical parameter
    phytoplankton
    solar radiation
    temperature
    thermal radiation
    variability
    wind speed
    Opis:
    An integrated ecological system model was used to determine the influence on Baltic phytoplankton of the long-term variability in the sea’s main physical parameters. A three-dimensional coupled sea-ice model was developed. A simple ecosystem was added to the sea-ice model and used to estimate phytoplankton variability during long-term changes in the main atmospheric forces. Scenarios similar to those of climate were performed by altering the main physical parameters such as temperature, wind speed, solar and thermal radiation (in different configurations). The influence of the variability in these parameters on phytoplankton is discussed.
    Źródło:
    Oceanologia; 2011, 53, (1-TI)
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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