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Wyszukujesz frazę "diatom" wg kryterium: Temat

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    Wyświetlanie 1-8 z 8
    Tytuł:
    Spatio-temporal variation of microphytoplankton in the upwelling system of the South-Eastern Arabian Sea during the summer monsoon of 2009
    Autorzy:
    Thomas, L.C.
    Padmakumar, K.B.
    Smitha, B.R.
    Asha Devi, C.R.
    Nandan, S.B.
    Sanjeevan, V.N.
    Powiązania:
    https://bibliotekanauki.pl/articles/49085.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Arabian Sea
    upwelling
    coastal water
    phytoplankton
    chlorophyll a
    diatom
    centric diatom
    spatio-temporal variability
    microphytoplankton
    Chaetoceros
    Źródło:
    Oceanologia; 2013, 55, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First records of two planktonic Indo-Pacific diatoms: Chaetoceros bacteriastroides and C. pseudosymmetricus in the Adriatic Sea
    Autorzy:
    Calic, M.
    Ljubimir, S.
    Bosak, S.
    Car, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/47839.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    diatom
    Chaetoceros bacteriastroides
    Chaetoceros pseudosymmetricus
    phytoplankton
    marine ecosystem
    Bacillariophyta
    Adriatic Sea
    Opis:
    Unusual occurrence of planktonic diatom species, Chaetoceros bacteriastroides and Chaetoceros pseudosymmetricus, was noticed in three different marine ecosystems of Adriatic Sea: the Krka Estuary and Telaščica Bay in the Central Adriatic, and in southern Adriatic offshore. From 2010 to 2015, these two Chaetoceros species were recorded in heterogeneous environmental conditions and in a very low abundances. Both species are regarded as very rare in world oceans, and consequently knowledge of their distribution and ecology is rather poor. Primarily described from tropical waters and showing Indo-Pacific distribution, C. bacteriastroides and C. pseudosymmetricus findings in Adriatic represent the northernmost records in world's oceans and seas. For C. pseudosymmetricus this is also the first occurrence in European seas. Areal expansion and introduction of new phytoplankton species in the Adriatic Sea might be related to different circulation regimes in the Ionian Sea and the concurrent rise in sea temperature in the Mediterranean in the last decade. Recent investigations have shown that entering currents, of either Atlantic/Western Mediterranean or Eastern Mediterranean origin, modify the composition of the plankton community in the Adriatic by bringing different newcomers.
    Źródło:
    Oceanologia; 2018, 60, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The first observed bloom of the diatom Dactyliosolen fragilissimus (Bergon) Hasle 1996 in the Gulf of Gdańsk
    Autorzy:
    Lotocka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/47455.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    biomass
    coastal water
    bloom
    Baltic Sea
    phytoplankton
    Gdansk Gulf
    diatom
    Dactyliosolen fragilissimus
    Opis:
    The diatom Dactyliosolen fragilissimus (Bergon) Hasle 1996 (syn. Rhizosolenia fragilissima Bergon 1903) occurs in the western Baltic Sea predominantly in summer, sometimes forming blooms. In autumn 2005, numerous D. fragilissimus cells were observed for the first time in the coastal waters of the Gulf of Gdańsk. In November 2005a bloom was formed: at its peak, the diatom count was 1.1×106 cells dm−3 and its biomass was 8.9 mg dm−3.
    Źródło:
    Oceanologia; 2006, 48, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phytoplankton response to changes of physicochemical variables in Lake Nasser, Egypt
    Autorzy:
    Hussian, A.-E. M.
    Napiorkowska-Krzebietke, A.
    Toufeek, M.E.F.
    El-Monem, A.M.A.
    Morsi, H.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/961602.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    phytoplankton
    density
    physicochemical variation
    nutrient
    chlorophyll a
    diatom
    Lake Nasser
    Egypt
    Opis:
    Seasonal and spatial changes of phytoplankton in relation to environmental variables affecting the water quality were investigated along the main channel of Lake Nasser throughout 2013. In total, 104 phytoplankton species, belonging to 7 classes, were identified. Phytoplankton assemblages were dominated by Bacillariophyceae, Cyanophyceae and Chlorophyceae, whereas Dinophyceae, Euglenophyceae, Chrysophyceae and Cryptophyceae were infrequent. Cyclotella glomerata, C. ocellata and Aulacoseira granulata represented the most abundant species among Bacillariophyceae. Cyanophyceae was dominated by Planktolyngbya limnetica and Eucapsis minuta, and Chlorophyceae by Ankistrodesmus fusiformis and Staurastrum paradoxum. The water column was thermally stratified during summer, while being mixed throughout winter. Phytoplankton features and physicochemical variables were analyzed with the principal component analysis. Electrical conductivity and water temperature were the most common factors negatively controlling phytoplankton density. Phytoplankton density was positively associated with NO3, whereas it was negatively correlated with PO4 and HCO3. Cyanophyceae were strongly adapted to the environmental variables and NO2 was limiting their growth. Chlorophyceae were more dependent on PO4 than NO3. The vertical distribution of Chl a was associated with the summer thermal stratification and its concentration increased southwards. Chl a was affected by NO2 and linked to Chlorophyceae. The regional variations of phytoplankton reflected its response to varying environmental conditions. The annual average of the trophic state index indicated eutrophic waters of Lake Nasser.
    Źródło:
    Journal of Elementology; 2015, 20, 4
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Allelopathic interactions between the red-tide causative dinoflagellate Prorocentrum donghaiense and the diatom Phaeodactylum tricornutum
    Autorzy:
    Cai, Z.
    Zhu, H.
    Duan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/48532.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    dinoflagellate
    Prorocentrum donghaiense
    marine diatom
    Phaeodactylum tricornutum
    allelopathy
    harmful alga
    phytoplankton
    red tide
    Źródło:
    Oceanologia; 2014, 56, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diatoms of the Rosnowskie Duze Lake in the Wielkopolska National Park in the years 2002 and 2003
    Okrzemki jeziora Rosnowskiego Duzego w Wielkopolskim Parku Narodowym w latach 2002 i 2003
    Autorzy:
    Celewicz-Goldyn, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/878492.pdf
    Data publikacji:
    2006
    Wydawca:
    Uniwersytet Przyrodniczy w Poznaniu
    Tematy:
    nymphaeid
    Wielkopolski National Park
    Polska
    elodeid
    helophyte
    eutrophic lake
    phytoplankton
    Lake Rosnowskie Duze
    taxonomy
    diatom
    pelagic zone
    Źródło:
    Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana; 2006, 10
    1896-1908
    Pojawia się w:
    Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laboratory measurements of remote sensing reflectance of selected phytoplankton species from the Baltic Sea
    Autorzy:
    Soja-Wozniak, M.
    Darecki, M.
    Wojtasiewicz, B.
    Bradtke, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/47866.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    remote sensing
    reflectance
    phytoplankton
    diatom
    Cyclotella meneghiniana
    Skeletonema marinoi
    Cyanoprokaryota
    Dolichospermum
    Nodularia spumigena
    Synechococcus
    Baltic Sea
    Opis:
    Results of unique laboratory measurements of remote sensing reflectance (Rrs) of several phytoplankton species typically occurring in high abundances in the Baltic Sea waters are presented. Reflectance spectra for diatoms: Cyclotella meneghiniana and Skeletonema marinoi and Dolichospermum sp., Nodularia spumigena and sp. were analysed in terms of assessment of their characteristic features and the differences between them. These species contain similar pigments, which results in general similarities of reflectance spectra, i.e. decrease of reflectance magnitude in the blue and red spectrum regions. However, hyper-spectral resolution of optical measurements let us find differences between optical signatures of diatoms and cyanobacteria groups and between species belonging to one group as well. These differences are reflected in location of local maxima and minima in the reflectance spectrum and changes in relative height of characteristic peaks with changes of phytoplankton concentration. Wide ranges of phytoplankton concentrations were analysed in order to show the persistence of Rrs characteristic features. The picoplankton species, Synechococcus sp. show the most distinct optical signature, which let to distinguish separate cluster in hierarchical cluster analysis (HCA). The results can be used to calibrate input data into radiative transfer model, e.g. phase function or to validate modelled Rrs spectra.
    Źródło:
    Oceanologia; 2018, 60, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of phytoplankton size-structure based productivity, pigment complexes (HPLC/CHEMTAX) and species composition in the Cochin estuary (Southwest coast of India): special emphasis on diatoms
    Autorzy:
    Paul, M.
    Valappan, M.N.
    Nanappan, U.
    Gopinath, V.
    Velloth, R.T.
    Rajendran, A.
    Nair, M.
    Peariya, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078766.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton
    size structure
    photopigment
    species composition
    diatom
    chlorophyll a
    primary production
    seasonality
    high performance liquid chromatography
    chemotaxonomy
    India
    Opis:
    Seasonal studies on size-fractionated phytoplankton productivity (biomass and primary production), marker pigments, and species composition and abundance were carried out in the Cochin estuary (CE), located on the southwest coast of India, to identify the critical environmental factors that control the consistent preponderance of diatoms. The overall results of the study showed a significant contribution of small-sized phytoplankton, specifically nanophytoplankton (2—20 μm), to the total chlorophyll a and primary production in the estuary, regardless of seasons. Diatoms constituted the major phytoplankton taxa, showed an exceptional seasonal scale increase in numerical abundance during the post-southwest monsoon. The relative increase in fucoxanthin (biomarker of diatoms) over other marker pigments substantiated the numerical dominance of diatoms throughout the sampling periods. This is the first study in the CE in which phytoplankton marker pigments have been detected and elucidated the seasonality of functional groups based on HPLC/chemotaxonomy analytical approaches. The prevalence of high DiatDP and diatom chlorophyll a equivalent (estimated by CHEMTAX), further confirmed the preponderance of diatoms in the CE, despite the intermittent dominance of cyanophytes and cryptophytes (monsoon period). The consistent increase in SPM levels (> 25 mg L—1), established at all sampling stations, indicated that the water column turbidity might be one of the significant environmental factors hindering the growth of large-sized phytoplankton (ca. >20 μm) in the CE even if the system invariably holds high inorganic nutrients, irrespective of seasons
    Źródło:
    Oceanologia; 2021, 63, 4; 463-481
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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