- Standardsignatur5943
- TitelThe effect of stemflow on transplanted Hypogymnia physodes in the urban area of Salzburg (Austria)
- VerfasserRoman Türk (*)Cornelia Moser (*)
- ErscheinungsortHorn
- VerlagVerlag Ferdinand Berger & Soehne Ges.m.b.H.
- Erscheinungsjahr2005
- SeitenS. 317-330
- Illustrationen3 Abb., 2 Tab., 30 Lit. Ang.
- MaterialArtikel aus einer ZeitschriftUnselbständiges Werk
- Datensatznummer200138873
- QuellePhyton 2005, 45(3) Special Edition : Special Aspects of Plant function, S. 317-330
- AbstractIn the city of Salzburg a study was carried out to investigate possible effects of the stemflow on lichens using a transplant technique along raintracks of trees. Between November 2000 and June 2001 specimens of Hypogymnia physodes were exposed around the trunks of Tilia cordata at 6 different sites in the urban area of Salzburg. The lichen thalli were fixed on discs of cork which were fitted into bark holes. As the physiological response of the exposed lichens the CO[2]-gas exchange was observed in time intervals of 4 weeks. Also the pigment content was measured after exposition. Visible damage and changes in the size of the exposed lichen samples were determined photographically. The stemflow after a rain phase was collected with an equipment created by the department of environmental protection of the provincial government of Salzburg and analysed for conductivity, pH and the content of Ca[2][+], SO[4][2][-], NH[4][+], NO[3][-] and Zn. After 6 months of exposure most of the specimens showed no seriously visible damages. Only some peripheral and selective chlorosis and necrosis appeared. At several sites growth of the thalli was observed to a certain extent. The lichens had unimodal responses in gas exchange. The physiological activity varied with alteration in environmental conditions. After rain periods the NP-rates were increasing and the DR-rates were significantly negative correlated. The lichens had unimodal responses in gas exchange. The physiological activity varied with alteration in climatic conditions. After rain periods the NP-rates were increasing and the DR-rates were significant negative correlated. No apparent changes in chlorophyll a and b content occured. Average levels of contaminants were low but showed higher values in the winter months.
- SchlagwörterLichen, Hypogymnia physodes, Stammabflusswasser, Luftverunreinigung, CO2-Austausch, Chlorophyllgehalt, Epiphyt, Tilia cordata, urbaner Einfluss, Salzburg
- Klassifikation181.45 (Einflüsse durch Verunreinigungen der Umwelt)
116.11 (Auffangen des Regens durch das Kronendach, Durchtropfen, Stammabfluß usw.)
161.1 (Saft- und Gaszirkulation. Absorption. Ausscheidung (Exudation). Transpiration (lediglich Mechanismus dieser Prozesse))
172.9 (Lichenes (Flechten))
176.1 (Dicotyledoneae [Siehe Anhang D])
[436.5] (Salzburg)
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