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| Titel: |
Elevated concentration of ground-level ozone causing a damage of assimilation apparatus of forest woody species. |
| Auteur: |
Emilie Bednářová Sabina Truparová |
| Verschenen in: |
Casopis Beskydy |
| Paginering: | Jaargang 2 (2009) nr. 2 pagina's 119-124 |
| Jaar: |
2009 |
| Inhoud: |
A damage of the assimilation apparatus of forest woody species due to anthropogenous effects can be characterised by means of an analysis of the condition of epicuticular waxes. The structure and amounts of epicuticular waxes on the surface of leaves and needles responds very quickly to environmental changes and indicate the damage of assimilation apparatus already in the latent, initial stages. At present, the damage of forest stands by elevated concentrations of ground-level ozone is one of the Pan-European problems. The most endangered are the forest stands situated in subalpine regions at altitudes above 850 m; here, the measured concentrations of ground-level ozone were very high and this was manifested in a decrease and the destruction of epicuticular waxes on the one hand and the occurrence of necrotic spots on the needle surface on the other. The most intensive degradation of epicuticular waxes was observed in Norway spruce (Picea abies /L./ Karst.) forest stands in the Krušné hory mountains while in the Beskydy mountains, a very small damage was observed only in the latent stage what corresponds with the measured values of ozone concentration. A strong correlation between the ozone concentration and amount of epicuticular waxes were found on six investigated location across The Czech Republic. The index of determination (R2) ranged from 0.88 to 0.96 in years 2006 and 2007 by both first and second years needle. |
| Uitgever: |
Mendel University, Brno (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 5 van 11 gevonden artikelen
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