Effects of air pollution on vegetation

Halbwachs, G.

doi:10.1007/978-94-009-7269-8_5

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…Beside the direct SO2 adverse effect on vegetation (Halbwachs 1983), long-term indirect effects from acidifying precipitation and consequently soil have been reported (Krause 1989;Fuhrer 1990). In the present study, acidity was found to be the main soil factor responsible for structuring community composition in bare spot vegetation (Table 3).…”

Section: Factors Responsible For Vegetation Differentiationmentioning

confidence: 99%

“…However, vegetation restricted to infertile soils has been reported to show lower response to nutrient addition than do related plants from more-fertile soils (see Chapin et al 1986 for list of references). This is clearly the case in bare spot vegetation in the region studied: Decreased metabolic activity of decomposition microflora, leaching losses of nitrogen and resulting massive efflux of nutrients (Klein & Perkins 1988) and a delay of litter decomposition (Chapin et al 1986) are among the main consequences of acid soil environment and, in turn, contribute to shifting of pH values towards more acidic reaction (Halbwachs 1983).…”

Section: Factors Responsible For Vegetation Differentiationmentioning

confidence: 99%

“…Low species diversity (Table 1) is suggested to contribute to this phenomenon. Generally, most ecosystems under pollution stress show a decrease in the species number by elimination the most sensitive species and promotion of a considerable increase in the resistant species abundances (Halbwachs 1983). A limited pool of species capable 53 of successful performance under the given conditions probable also contributes to the successional development converging between plots of different starting situations.…”

Section: Factors Responsible For Vegetation Differentiationmentioning

confidence: 99%

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Pattern of species dominance and factors affecting community composition in areas deforested due to air pollution

Pyšek¹

1994

Vegetatio

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Vegetation of mountain areas affected by SO2 pollution (Krugn6 hory Mts., Czech Republic) was analysed using multivariate methods. Communities with prevailing species CaIamagrostis villosa, a rhizomatous grass expanding into deforested sites, were sampled by Braun-Blanquet relev6 method. Canonical correspondence analysis was used to assess the effect of environmental variables (soil removal, deforestation, and shading). To test the effects of light, moisture, soil acidity and nitrogen, mean sample indicator values were correlated a posteriori with sample axes on ordination scores. Light, soil acidity, moisture, and site history (in terms of past deforestation and soil removal applied in reclamation procedures) were found to be the main factors responsible for the community composition. Nitrogen level had not a significant effect on the community composition. When analyzing the whole data set, i.e. including also remnants of natural spruce forests, light was the factor affecting at most the composition of communities. Within the bare spot vegetation, if treated separately, the highest variation was found along the soil acidity/moisture gradient. The effect of soil removal was only obvious at early successional stages. Species diversity increased with moisture and decreased with soil acidity. Species exhibiting Sand/or R-strategy are successful on extremely acid soils whereas forbs present in bare spots appear to be supported by disturbances.

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Section: Factors Responsible For Vegetation Differentiationmentioning

confidence: 99%