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Soil macrofauna of mountain spruce stands in the Bohemian Forest as affected with selective tree cutting
Tajovský, Karel ; Pižl, Václav
Assemblages of soil macrofauna (earthworms, millipedes and centipedes) were studied in three specially protected mountain spruce stands in the Bohemian Forest (Czech Republic) in 2000-2003 using soil sampling to assess their quantitative and qualitative parameters. Spruce forests under study possessed poor (density 7,7-61,3 ind.m-2), but very specific earthworm assemblages built of 2-4 acidotolerant epigeic species. Similarly, assemblages of millipedes were low in both density (1,6-44,8 ind.m-2) and species numbers. Density of centipedes reached 41,1-206,4 ind.m-2, and their assemblages were composed mainly of the representatives of the order Geophilomorpha. Comparison of intact stands and those with selective cutting of spruce trees showed the negative impact of forestry management on populations of millipedes and centipedes. Density of both groups as well as species number of millipedes was markedly lower at selectively cut plot in the Trojmezná. On the contrary, denser earthworm populations were found at cut than at intact plots, most probably due to changes in herb vegetation and litter layer followed tree cutting.
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Soil microflora of spruce forests of the Bohemian Forest
Nováková, Alena ; Lukešová, Alena
Species composition and quantity of microalgae and micromycetes inhabiting soils of original spruce forest were studied in 3 localities of the Bohemian Forest (Trojmezná, Smrčina, Boubín) in years 2000-2003. Both intact plots, and those ones with selective tree cutting were compared in Trojmezná and Smrčina. In total, 46 species of algae and 72 taxa of micromycetes, represented by common soil species, were found in studied soils. Green algae (mainly Chlorophyceae and Charophyceae) prevailed both qualitatively and quantitatively among soil algae which was connected with low pH. All isolated micromycetes belonged to saprotrophic fungi. Total numbers of algal species ranged between 20-33 and total algal abundance between 48,1-4210,0 cells per g of dry soil in studied plots. Higher algal species richness was recorded in plots with selective tree cutting then in intact plots. Oposite trend of average total algal abundance was observed, despite big variations in particular sampling occasions. Numbers of taxa of saprophytic mycromycetes ranged between 32-40, lenght of mycelium between 6,1-84,5 m per g of dry soil, and numbers of CFU between 57,5-2413,4. No differences in species composition and quantity of saprotrophic micromycetes between intact plots and plots with tree cutting were found.
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