Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "muszle" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Zależność koncentracji metali ciężkich i węgla organicznego w muszlach mięczaków środkowodnych: Lymnaea peregra (Müller, 1774), Lymnaea stagnalis (L.) i Dreissena polymorpha (Pallas, 1771) od ich wielkości
Correlation of concentration of heavy metals and organic carbon in shells freshwater molluscs Lymnaea peregra (Müller, 1774), Lymnaea stagnalis (L.) and Dreissena polymorpha (Pallas, 1771) with their size
Autorzy:
Piotrowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/2074454.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
mięczaki słodkowodne
metale ciężkie
muszle
Lymnaea peregra
Lymnaea stagnalis
Dreissena polymorpha
freshwater molluscs
shells
heavy metal
Opis:
The shells of Lymnaea peregra and L.stagnalis were collected from a fishing pond in Kłemby near Nowogard (NW Poland), and those of Dreissena polymorpha came from the nearby Odra River estuary (Roztoka Odrzańska). The latter site had much higher concentrations of heavy metals, both in water and in bottom sediments. The study aimed at finding correlations between the concentrations of heavy metals and organic carbon and the shell size. In shells of freshwater snail Lymnaea peregra three second degree polynominal correlations were confirmed at the 0.05 significance level of between concentrations Co (positive), Corg. (negative) and Cd and height of shells. In the other three cases (Cu, Pb, Zn) there was no correlation significant at the 0.10 level. In shells of Lymnaea stagnalis three parameters shown significant (at the 0.05 level) correlation with shell size: concentrations of Zn (negative), Co (negative) and Corg. (positive). The other three (Cu, Pb, Cd) were insignificant even at the 0.10 level. In shells of a bivalve, zebra mussel Dreissena polymorpha, concentrations of four element shown significant (p=0.05) correlation with shell length: Pb (negative), Zn, As and Hg (all positive). Concentrations of Sr and Co were positively correlated and concentrations of Cd and Corg. Negatively correlated with shell size of this species at 0.10 significance level. Both in the case of snails and zebra mussels, no significant correlation was observed between their size and Cu concentrations. The results indicate that there the concentrations of heavy metals and Corg are indeed size-dependent, and the correlations differ among studied molluscs. Further research is necessary to establish standard procedures for measurements of these parameters for use in monitoring studies: whether the concentrations in shells of indicator species should be analysed in specimens of standard size or standard age to allow for comparisons of measurments taken in different sampling sites or habitats.
Źródło:
Przegląd Geologiczny; 2006, 54, 6; 501-508
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Możliwość rozróżnienia małży i ślimaków słodkowodnych na podstawie koncentracji metali ciężkich w tkankach miękkich i muszlach
A possibility of making a distinction between freshwater bivalves and snails on the basis of concentration of heavy metals in soft tissues and shells
Autorzy:
Piotrowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/2075610.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Ujście rzeki Odry
jeziora Pomorza Zachodniego
Polska
mięczaki słodkowodne
tkanki miękkie
muszle
woda
osad denny
metale ciężkie
Odra river estuary
lakes of Western Pomerania
Polska
freshwater molluscs
soft tissues
shells
water
bottom sediment
heavy metals
Opis:
The study involved 17 species of freshwater molluscs. The concentration of heavy metals (Cu, Zn, Pb, Co, Cd andHg) in soft tissues was determinedfor 14 species, while the concentration of heavy metals in shells was determinedfor 16 species. Totally, 110 samples of soft tissue and 119 samples of shells were analysed. The statistical analysis of the qualitative data concerning concentration of metals in shells indicated a clear distinction between snails and bivalves. The only exception is Unio crassus, which was assigned to a three-point cluster together with snails. With respect to snails, this may be because the analysis was performed only on one sample. The results of this study can be significant both for palaeontological research and palaeoenvironmental research. If we have a few shell fragments available, it can be generally concluded, based on geochemical analysis of heavy metals in shells, which shell fragments belong to bivalves and which to snails. It is also possible to assess geochemical conditions of ancient ecosystems. Obviously, the given results are preliminary and they suggest necessity of further research.
Źródło:
Przegląd Geologiczny; 2017, 65, 6; 400--404
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies