Please use this identifier to cite or link to this item:https://hdl.handle.net/20.500.12259/52113
Type of publication: Tezės kituose recenzuojamuose leidiniuose / Theses in other peer-reviewed publications (T1e)
Field of Science: Ekologija ir aplinkotyra / Ecology and environmental sciences (N012)
Author(s): Sujetovienė, Gintarė;Galinytė, Vilma
Title: Effects of the urban environmental conditions on the physiology of two biological indicators
Is part of: The vital nature sign [elektroninis išteklius] : 9th international scientific conference : abstract book. Kaunas : Vytautas Magnus university, 2015, [no. 9]
Extent: p. 49-49
Date: 2015
Keywords: Air quality;Lichen;Moss;Physiological response
Abstract: Response to air pollution was assessed for lichen Evernia prunastri (L.) Ach. and the moss Ptilium crista-castrensis (Hedw.) DeNot. Samples were collected from a relatively clean remote area (Birštonas) and transplanted to a control site and three areas reflecting the different urbanization levels: urban, suburban and residential areas. Transplants were exposed for 1- and 2-month periods. Concentrations of gaseous pollutants (NO, NO2, SO2) were monitored by air monitoring stations. Differences in response of fluorescence, chlorophylls contents, MDA and injuries of cell membranes were observed among the two species and between the sites. Transplants of P.crista-castrensis from urban sites showed a decrease in chlorophyll a fluorescence. The integrity of cell membranes was also more damaged in the transplanted moss samples than in lichen. Significantly higher oxidative stress was induced in the transplants at urban and residential sites in the beginning of transplantation period (after 1 month) but such trend was not characteristic after 2 months. Since SO2 concentrations were relatively low but they were negatively correlated with chlorophyll content in moss samples. There was a linear relationship between SO2 concentration and MDA content of lichen and moss samples exposed in urban environmental conditions. Chlorophyll a and b content in mosses was positively related with nitrogen oxides while lichen showed the opposite trend. Results fit with the known ecological requirements of the studied species: E.prunastri being characteristic to relatively dry and warm sites, P.crista-castrensis being typical to moister and cooler sites. The results on transplants vitality showed that lichen is more suitable for bioindication studies with changes physiological parameters while moss was more sensitive to pollutants and site condition
Internet: https://hdl.handle.net/20.500.12259/52113
Affiliation(s): Aplinkotyros katedra
Gamtos mokslų fakultetas
Vytauto Didžiojo universitetas
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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