Autor: Pawlik-Skowrońska, Barbara - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Tajemnice odporności glonów i sinic na toksyczne metale ciężkie
Mystery of algal resistance to heavy metals
Autorzy:: Pawlik-Skowrońska, Barbara
Powiązania:: https://bibliotekanauki.pl/articles/1201892.pdf
Data publikacji:: 2002
Wydawca:: Polskie Towarzystwo Przyrodników im. Kopernika
Opis:: It is known that heavy metal pollution in aquatic environments causes significant changes in algal diversity and community structure. Some species or only some populations are able, however, to survive in the presence of elevated metal concentrations. The observed algal resistance to toxic metals seems to be dependent on a range of factors limiting toxic metal bioavailability, but mainly on intrinsic features of the organisms. Many different mechanisms of metal resistance were reported, however, the phenomenon is still not fully understood, because it seems to be both species/ecotypeand metal-dependent. The author of the article tries to make some progress in explaining of the mechanisms of algal survival and adaptation to environments of high metal concentrations, by studying production with thiol peptides in different ecotypes.
Źródło:: Kosmos; 2002, 51, 2; 175-184
0023-4249
Pojawia się w:: Kosmos
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Glony środowisk zanieczyszczonych metalami ciężkimi
Algae in heavy metal - polluted environments
Autorzy:: Skowroński, Tadeusz
Kalinowska, Renata
Pawlik-Skowrońska, Barbara
Powiązania:: https://bibliotekanauki.pl/articles/1201887.pdf
Data publikacji:: 2002
Wydawca:: Polskie Towarzystwo Przyrodników im. Kopernika
Opis:: Algae are very diverse photosynthetic plants that have neither roots nor leafy shoots and which also lack vascular tissues (VAN DEN HOEK et al., 1995). Most of them are aquatic organisms and occur both in fresh and saline waters, but they also inhabit terrestrial environments. As pioneers, algae take part in primary production and in colonization of poor and degraded habitats. The primary impact of heavy metals on algae is at the biochemical and physiological levels. These biochemical and physiological effects may cause ecological effects. Usually, in heavy metal-polluted environments algal biomass as well as algal species diversity decrease. In such places the sensitive organisms and species in algal communities may be replaced by tolerant ones as a consequence of chemical stress. The observed shift in species composition in a community affected by heavy metals is not a random process; chronic exposure to low concentrations of heavy metals may act as a selection factor. Preliminary studies on algal species diversity and heavy metal resistance of species inhabiting Zn, Pb or Cu polluted sites (near metallurgical and mining plants in Silesia) are described.
Źródło:: Kosmos; 2002, 51, 2; 165-173
0023-4249
Pojawia się w:: Kosmos
Dostawca treści:: Biblioteka Nauki

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