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Water potential of the Goc mountain [Serbia, Yugoslavia] in the function of sustainable management of the forest ecosystems
1998
Ristic, R. (Sumarski fakultet, Beograd (Yugoslavia)) | Macan, G. | Malosevic, D. | Nikic, Z. | Macan, I.
Mountain Goc is one of the regions with the highest water potential in Central Serbia (Yugoslavia), with specific annual runoff of 12-17 l/s per square km. Upper part of the catchment area of the Gvozdacka River has 111 springs, on the surface of 13.3 square km. 33 springs has volume yield from 0.5 to 2.5 l/s, with physical and chemical parameters of high water quality. These springs never dry up, even during years with low amount of precipitation. The upper part of the catchment area of the Gvozdacka River is under association Abieti-Fagetum, which is one of the worthiest in Serbia (Yugoslavia). Besides annual amount of precipitation, characteristics of soil, hydro-geological attributes of rock masses, influence of vegetation on processes of interception and evapotranspiration, which are very important factors for preservation of springs and their volume yield, also the system of forest ecosystems management. Not adequate measures in exploitation of forests lead to decreasing of volume yield of springs, and often to their disappearing.
Afficher plus [+] Moins [-]Modelling the spatial distribution of agricultural ammonia emissions in the UK
1998
Dragosits, U. | Sutton, M.A. | Place, C.J. | Bayley, A.A. (Institute of Terrestrial Ecology, Bush Estate, Penicuik, Midlothian EH26 0QB, Scotland (United Kingdom))
Relationships of ozone exposure to pine injury in the Sierra Nevada and San Bernardino Mountains of California, USA
1998
Arbaugh, M.J. | Miller, P.R. | Carroll, J.J. | Takemoto, B. | Procter, T. (Riverside Fire Laboratory, Pacific Southwest Research Station, USDA Forest Service, 4955 Canyon Crest Drive, Riverside, CA (USA))
The life history strategy reflected in morphology, biomass allocation and standing crop of Athyrium distentifolium
1998
Fiala, K. | Tuma, I. (Akademie Ved, Brno (Czech Republic). Ustav Ekologie Krajiny) | Pande, K.
Determination of soil hydrolimits in spruce stand soil profile in the Beskids Mts. [Czech Republic]
1998
Novak, F. | Kalcik, J. (Akademie Ved, Ceske Budejovice (Czech Republic). Ustav Pudni Biologie) | Rauch, O.
The soil water retention potentials and other hydrolimits of individual soil horizons of podzolized soil were determined in the stand of Picea abies (Mecuvka, the Beskids, Czech Republic) on godulic sandstone. Different hydropedologic characteristics for the individual soil horizons were found. Extreme values were detected for the albic E horizon, which importance for water and nutrient status of forest stand on podzolic soil is discussed.
Afficher plus [+] Moins [-]Hydric regime of mountainous spruce forest stand
1998
Tuzinsky, L. (Technicka Univ., Zvolen (Slovak Republic). Lesnicka Fakulta)
Analysis of incidence of extraordinary sums of precipitation at the Bily Kriz station [the Moravian-Silesian Beskids Mts., Czech Republic] in 1997
1998
Roznovsky, J. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic))
The growth of Calamagrostis villosa at different localities in the Moravian-Silesian Beskids Mts. [Czech Republic]
1998
Holub, P. (Akademie Ved, Brno (Czech Republic). Ustav Ekologie Krajiny) | Pande, K.
Natural regeneration of beech under ecologically difficult conditions
1998
Penaz, J. | Martinek, J. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Fakulta Lesnicka a Drevarska)
In the region of Knehyne-Velka Stolova in the Moravian-Silesian Beskids, where there are ecologically difficult conditions for functioning forest ecosystems, possibilities were studied for the naturat regeneration of beech. The study of problems was particularly related to generative propagation, however, cases of vegetative propagation were also found. Potential possibilities of regeneration are related to the seed year 1995. Rooting ability of layered branches or lying beech trees wes studied. Analysis is given of a rooting beech branch.
Afficher plus [+] Moins [-]Comparison of soil thermal regimes in a deforested area with various grass cover in the Beskids Mts. [Czech Republic]
1998
Tuma, I. (Akademie Ved, Brno (Czech Republic). Ustav Ekologie Krajiny)
The studies of grass communities, which spread in deforested areas, also involved observations of soil thermal regimes. Three sites were chosen in order to determine differences in diurnal and seasonal variations of soil temperatures: (1) open site (barren) without plant cover, (2) site covered by a young, lower and thinner stand of Avenella flexuosa, and (3) old, dense stand of Calamagrostis villosa with a layer of plant litter on the soil surface. Soil temperatures were measured at the soil surface and in the soil depth of 5 and 10 cm. In summer months, the greatest differences in maximal temperatures recorded at the soil surface and at the 5, 10 cm depth between the bare site and the old stand of C. villosa represented 21.6, 15.9, 12.4 deg C, respectively. Soil temperatures measured in the bare plot in autumn months were lower than those in grass stands.
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