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Wyszukujesz frazę "coastal sediment" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Chamelea gallina in the coastal waters of the Anapa bay bar (the Black Sea) as a carbonate sediment producer
    Autorzy:
    Kosyan, A.R.
    Divinsky, B.V.
    Powiązania:
    https://bibliotekanauki.pl/articles/47884.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Chamelea gallina
    biomass
    population
    shell length
    coastal water
    bivalve
    carbonate sediment
    Anapa Bay
    Black Sea
    Źródło:
    Oceanologia; 2019, 61, 4
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microphytobenthic primary production on exposed coastal sandy sediments of the Southern Baltic Sea using ex situ sediment cores and oxygen optodes
    Autorzy:
    Kuriyama, K.
    Grundling-Pfaff, S.
    Diehl, N.
    Woelfel, J.
    Karsten, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078927.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    microphytobenthos
    primary production
    sandy sediment
    coastal water
    benthic diatom
    oxygen consumption
    oxygen production
    respiration
    hydrodynamics
    Baltic Sea
    Opis:
    The shallow coastal water zone of the tide-less southern Baltic Sea is dominated by exposed sandy sediments which are typically inhabited by microphytobenthic communities, but their primary production is poorly studied, and hence four stations between 3.0 and 6.2 m depth were investigated. Sediment cores were carefully taken to keep the natural layering and exposed in a controlled self-constructed incubator. Respiratory oxygen consumption and photosynthetic oxygen production were recorded applying planar oxygen optode sensors. We hypothesized that with increasing water depths the effects of wind- and wave-induced erosion and mixing of the upper sediment layer are dampened and expected higher microphytobenthic biomass and primary production in the incubated cores. Our data partly confirm this hypothesis, as cores sampled at the most exposed stations contained only 50% chlorophyll a m−2 compared to the deeper stations. However, primary production was highly variable, probably due to fluctuating sediment-disturbing conditions before the cores were taken. Due to these physical forces sand grains were highly mobile and rounded, and small epipsamic benthic diatoms dominated, which preferentially occurred in some cracks and crevices as visualized by scanning electron microscopy. The data fill an important gap in reliable production data for sandy sediments of the southern Baltic Sea, and point to the ecological importance and relevant contribution of microphytobenthic communities to the total primary production of this marine ecosystem. Oxygen planar optode sensor spots proved to be a reliable, sensitive and fast detection system for ex situ oxygen exchange measurements in the overlying water of intact sediment cores.
    Źródło:
    Oceanologia; 2021, 63, 2; 247-260
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Canthaxanthin in recent sediments as an indicator of heterocystous cyanobacteria in coastal waters
    Autorzy:
    Krajewska, M.
    Szymczak-Zyla, M.
    Kobos, J.
    Witak, M.
    Kowalewska, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/47440.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Cyanoprokaryota
    chlorophyll a
    coastal water
    carotenoid
    chloropigment
    canthaxanthin
    Gdansk Gulf
    Baltic Sea
    recent sediment
    Źródło:
    Oceanologia; 2019, 61, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of tides and waves on near-surface suspended sediment concentrations in the English Channel
    Autorzy:
    Guillou, N.
    Rivier, A.
    Chapalain, G.
    Gohin, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/48548.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    suspended sediment concentration
    spatial variability
    temporal variability
    coastal water
    English Channel
    bathymetry
    numerical modelling
    ROMS model
    MERIS data
    Opis:
    Numerous ecological problems of continental shelf ecosystems require a refined knowledge of the evolution of suspended sediment concentrations (SSC). The present investigation focuses on the spatial and temporal variabilities of near-surface SSC in coastal waters of the English Channel (western Europe) by exploiting numerical predictions from the Regional Ocean Modeling System ROMS. Extending previous investigations of ROMS performances in the Channel, this analysis refines, with increased spatial and temporal resolutions, the characterization of near-surface SSC patterns revealing areas where concentrations are highly correlated with evolutions of tides and waves. Significant tidal modulations of near-surface concentrations are thus found in the eastern English Channel and the French Dover Strait while a pronounced influence of waves is exhibited in the Channel Islands Gulf. Coastal waters present furthermore strong SSC temporal variations, particularly noticeable during storm events of autumn and winter, with maximum near-surface concentrations exceeding 40 mg l1 and increase by a factor from 10 to 18 in comparison with time-averaged concentrations. This temporal variability strongly depends on the granulometric distribution of suspended sediments characterized by local bimodal contributions of silts and sands off coastal irregularities of the Isle of Wight, the Cotentin Peninsula and the southern Dover Strait.
    Źródło:
    Oceanologia; 2017, 59, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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