|
| |
|
| |
|
| |
|
| |
|
| |
|
|
Comparison of vegetation on ski slopes with artificial or natural snow in CHKO Bílé Karpaty and CHKO Beskydy
KOCKOVÁ, Jitka
Vegetation cover of 24 ski slopes both with artificial and natural snow was studied; on each slope 5 phytocenological relevés measuring 4 x 4 metres were taken. A method of direct gradient analysis (RDA) was used to detect differences in composition of phytocenological reléves on the ski slopes with natural or artificial snow. However, no impact of use of artificial snow on vegetation was identified. During the winter season of 2009 and of 2010 samples of artificial and natural snow were taken for chemical analyses. The chemical composition differed significantly; artificial snow contained more NO3-, SO42- and Ca2+ ions and its pH was more alkaline in comparison with natural snow.
|
|
|
Evaluation of long-term climatological monitoring of Mokré louky wetland by Třeboň and of other meteorological stations related to a change of hydrological cycle
KOVÁŘOVÁ, Milena
This study presents a detailed evaluation of long-term climatic data obtained from the meteorological station at Mokré louky wetland by Třeboň. A method for evaluation of dependence of air temperature on precipitation cycle is proposed and applied. The data from Mokré louky are compared with data from other meteorological stations in Czech Republic as well as in Europe and surroundings. The obtained results confirm a strong dependency of solar radiation reaching the Earth surface and dependently also the air temperature on the precipitation cycle. They represent in this way a fresh point of view on reasons for climate change, where the climate change is considered to be caused by a gradual decrease of permanent vegetation and current global desertification of continents.
|
|
| |
|
|
Spontaneous vegetation succession in mined peatlands
KONVALINKOVÁ, Petra
Spontaneous vegetation succession in mined peatlands in the Czech Republic was studied using the space-for-time substitution approach. The study focused on the variability of vegetation in traditionally mined (block-cut) and industrially mined (milled) peatlands. The influences of age, abiotic site factors, as well as landscape factors were analysed. The thesis summarizes also the state of current knowledge on various groups of organisms (plant, algae, fungi, and animals) in the extracted peatlands in the Czech Republic. The recomendations for the ecological restoration of mined peatlands are given.
|
|
|
Comparison of the flora of recultivated and succession influenced areas at sandpits in Třeboňsko Protected landscape area
RADOŠOVÁ, Tereza
The goal of this thesis is to compare flora on recultivated and succession-influenced areas in sandpits of Třeboňsko Protected landscape area in Southern Bohemia. This area is situated in Southern Bohemia region. The mapped sandpits are located in floodplain of the Lužnice river between towns České Velenice and Veselí nad Lužnicí. The mining of gravelous sand was started in about 1949 and in some places continues till these days. The character and structure of the landscape are seriously harmed by any types of mining process. Therefore there are implemented some arrangements which lead to renewal of the landscape. The aim of this work is to intercept the actual composition of the vegetation on the selected landscape areas and compare how these two ways of landscape renewal take affect to the nature variety.
|
guest ::
