Temat: brackish environment - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Trace fossils from the Lower Jurassic Ciechocinek Formation, SW Poland
Autorzy:: Leonowicz, P.
Powiązania:: https://bibliotekanauki.pl/articles/2061349.pdf
Data publikacji:: 2008
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: trace fossils
fine-grained clastics
brackish environment
Lower Jurassic
Opis:: Mud-silt deposits of the Lower Jurassic Ciechocinek Formation from the Czestochowa-Wielun region are characterized by a low diversity ichnofossil association, which includes the ichnogenera Planolites, Palaeophycus, Helminthopsis, Gyrochorte, Protovirgularia and Spongeliomorpha as well as some unidentified pascichnia. This association points to deposition in a low-energy brackish environment with poorly oxygenated sediments. Changes of seafloor oxygenation, influenced by periodical bottom currents, resulted in various bioturbation intensities, which range from none to high.
Źródło:: Volumina Jurassica; 2008, 6, 1; 89-98
1896-7876
1731-3708
Pojawia się w:: Volumina Jurassica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Fate of swelling clay minerals during early diagenesis: a case study from Gdańsk Bay (Baltic Sea)
Autorzy:: Kisiel, Marta
Skiba, Michał
Damrat, Mateusz
Kuligiewicz, Artur
Maj-Szeliga, Katarzyna
Makiel, Magdalena
Zajączkowski, Marek
Salata, Dorota
Powiązania:: https://bibliotekanauki.pl/articles/24264694.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Geologiczne
Tematy:: Smectite
chlorite
illite
reverse weathering
brackish environment
contemporary sediments
O-D method
Opis:: The aim of the study was to recognize the early diagenetic transformations of clay minerals likely taking place in the brackish environment of Gdańsk Bay (Baltic Sea). The Vistula River loads and sediments of the Vistula delta front and prodelta were studied. The mineral compositions of the clay fractions were determined by X-ray diffractometry. The average layer charge (LC) of the expandable interlayers was determined using the O-D vibrational spectroscopy method. The major element content of the studied clays was determined by inductively coupled plasma optical emission spectrometry. The <0.2 μm clay fraction, separated from the river sediments, contained illite-smectite mixed layered minerals, rich in high-charge, dioctahedral smectite (Ilt-Sme), illite, and kaolinite. The same clay fraction, separated from the delta-front sediments, was also composed mainly of Ilt-Sme, illite, kaolinite, and hydroxy-interlayered minerals. The <0.2 μm clay fraction from the prodelta sediments was depleted in Ilt-Sme and enriched in illite and chlorite, relative to the clays from both the river and the delta-front sediments. The LCs (0.45 to 0.56 per formula unit) were higher for clays from the river and the delta front sediments, relative to the clays from the prodelta. The <0.2 μm clay fractions from the prodelta sediments were enriched in MgO, Fe2O3, and K2O, relative to the fine clay fraction from the river. The results indicated that the smectite component of Ilt-Sme, deposited by the Vistula in Gdańsk Bay, underwent chloritization and likely illitization. The chloritization most likely proceeded via formation of hydroxy-interlayers within the smectite. Illite-like minerals, formed at the expense of the smectite with high LC, due to selective adsorption and fixation of K+ from seawater.
Źródło:: Annales Societatis Geologorum Poloniae; 2023, 93, 3; 305--322
0208-9068
Pojawia się w:: Annales Societatis Geologorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effect of physicochemical parameters on zooplankton in the brackish, coastal Vistula Lagoon
Autorzy:: Paturej, E.
Gutkowska, A.
Koszalka, J.
Bowszys, M.
Powiązania:: https://bibliotekanauki.pl/articles/48536.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: physicochemical parameter
zooplankton
brackish water
Vistula Lagoon
environment condition
canonical correspondence analysis
temperature
salinity gradient
Opis:: This paper analyzes whether physicochemical properties significantly influence the occurrence of zooplankton in a brackish reservoir. The studies were carried out on the Vistula Lagoon in August and September from 2006 to 2009 at 32 research sites. The environmental conditions in the Vistula Lagoon varied widely. At the time of the investigation, 17 species of rotifers, six species of Cladocera, and ten species of Copepoda were noted, and the total density of plankton fauna ranged from 145 to 765 ind. dm3. Statistical analysis demonstrated a significant correlation between the occurrence of some zooplankton species and certain environmental parameters, whereas the sampling sites were grouped according to study years. The zooplankton systems recorded at the research sites in 2006 constitute the most disparate group. Thus, it can be concluded that physicochemical properties might significantly impact both individual species (depending on their environmental demands) and entire zooplankton clusters.
Źródło:: Oceanologia; 2017, 59, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Effect of mangrove forest structures on wave attenuation in coastal Vietnam
Autorzy:: Bao, T.Q.
Powiązania:: https://bibliotekanauki.pl/articles/48094.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: brackish water
coastal region
forest structure
mangrove forest
marine environment
river mouth
saline water
storm
terrestrial environment
Vietnam
water quality
wave
wave attenuation
Opis:: This paper analyses wave attenuation in coastal mangrove forests in Vietnam. Data from 32 mangrove plots of six species located in 2 coastal regions are used for this study. In each plot, mangrove forest structures and wave height at different cross-shore distances are measured. Wave height closely relates to cross- shore distances. 92 exponential regression equations are highly significant with R2 >0.95 and P val. <0.001. Wave height reduction depends on initial wave height, cross-shore distances, and mangrove forest structures. This relationship is used to define minimum mangrove band width for coastal protection from waves in Vietnam.
Źródło:: Oceanologia; 2011, 53, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki