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Bottom soils in the rhizospheres of quillworts in the Czech Republic Bohemian Forest
Husák, Štěpán
The bottom soil from the rhizosphere of both quillwort species (Isoëtes lacustris and I. echinospera) was sampled in the Plešné and Černé lakes in the Bohemian Forest by C. Weilner and his collaborators (1996, 1998) and by M. Böhm (2002), and analysed in the chemical laboratory of the Institute of Botany, Czech Academy of Sciences, Průhonice (see Tab. 1.). The results of chemical analyses from the three years are comparable with smoothly increasing values. Only the potassium concentrations decreased from 116.25 mg.kg-1in 1996 to 5.75 mg.kg-1 in 2002 in Plešné Lake. This decrease can be explained by greater flushing of the sediments from the cirque walls into the stands of Isoëtes echinospora, in 1996. From 2004 to 2006 the bottom soils from Isoëtes stands will be analysed twice per year, with more samples from the Isoëtes stands. Nutrients will also be assessed on the radient between the Isoëtes stands and the shores of both lakes.
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Algae of Černé Lake in the Bohemian Forest
Lukavský, Jaromír
Algae and Cyanobacteria of Bohemian Forest are presented, as an important part of plant communities. Streams, bogs, arophytic ans subaerophytic standorts, phytoplankton of lakes and cryoseston are discussed and presented in tables and microphotographs.Bohemian Forest is an important refugium of oligotrophic species and a classic locality for therir study.
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Productivity of differently managed mountain meadows
Mašková, Z. ; Květ, Jan ; Zelený, D.
A mountain meadow (about 1160 asl) situated in the Šumava NP/BR was subjected to 3 treatments applied in mid-July in 4 succesive years: (i)mowing, (ii)mulching, (iii)no management. Seasonal courses of aboveground biomass varied between 0,35-0,5 kg.m-2 in all treatments and years while belowground biomass did between 6-9 kg.m-2. R/S ratio varied between 6-18, being mostly highest in the mown treatment. Litter dry weight varied mostly between 0,2-0,8 kg.m-2, being usually hightest in the unmanaged treatment. Seasonal courses of the above 3 production characteristics were highly variable. Estimated average annual aboveground net production was 0,6-0,7 kg.m-2 for all treatments and years.
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Central-European mountain spruce forests: regeneration of tree species after a bark beetle outbreak
Jonášová, Magda
Two different approaches were applied to mountain spruce (Picea abies) forests attacked by bark beetle in the Šumava National Park (Czech Republic): (1) a small portion of the stands was left without intervention, relying upon natural regeneration, and (2) traditional technical measures were adopted, in which attacked trees were felled and removed. The results confirmed that the original tree species of the mountain spruce forests regenerate well under dead canopy and the bark beetle outbreak could even be considered as a tool for the restoration of their natural character.
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Integrated tourism in the Bohemian Forest and its investigation in the European context
Bartoš, Michael ; Kušová, Drahomíra ; Těšitel, Jan
International project titled 'Supporting and promoting integrated tourism in EuropeŽs lagging regions (SPRITE)ö is aimed at comparing conditions to conduct such a type of tourism within six selected European countries ů Czech Republic, Greece, France, Ireland, Spain and United Kingdom. Šumava Mts. region was selected as one of model areas. By this project, tourism is analysed as a multifaceted phenomenon which can be described as interplay among six principal actors involved ů tourists themselves, host community, businesses, resource controllers, institutions and gatekeepers. Presentation of selected results and their comparison in the international scale is a main subject of discussion in this article.
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Biodiversity of staphylinid beetles (Coleoptera, Staphylinidae) in the Bohemian Forest - recent state, endangered species and their biotopes
Boháč, Jaroslav ; Matějíček, J.
More than 300 species of staphylinid beetles were found on 68 lokalities in the Bohemian Forest. 75 (23%) species of the all fauna belong to the Red list of the CR (5 critically endangered species, 27 endangered species and 43 vulnerable species). The most important biotopes for staphylinids in the Bohemian Forest are: petasites fringes of montane brooks, reedes and tall-sedge beds, foret springs, fens and transitional, mires, raised bogs, screes subalpine tall-forb vegetation, meadows and pastures, forest fringe vegetation, montane grey alder galleries, ravine dry pine, beech and spruce forests.
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Leaf-spinning moths (Lepidoptera) feeding on Vaccinium uliginosum L. along an ecological gradient of the Šumava peat bogs
Spitzer, Karel ; Bezděk, Aleš ; Jaroš, Josef
The leaf-spinning moths (Lepidoptera: Tortricidae, Gelechiidae, Chimabachidae and Geometridae) associated with the boreal plant Vaccinium uliginosum L. were investigated in two different peat bogs (Mrtvý Luh near Volary and Chalupská Slať near Borová Lada). During four years (1998-2001) of collecting leaf spinnings, 19 species of moths were recorded from both peat bogs. The occurence of moths was structured along a distinct mesoclimatic gradient. Species closely associated with peat bogs (tyrphobiontic and tyrphophilous taxa) were found to be most abundant in treeless centers of both bogs in comparisonwith marginal parts.
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