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Effect of fertilization on leaf anatomy of Carex acuta
HŮRKOVÁ, Drahomíra
This thesis is part of the project GA CR No 526/09/1546 ("Importance of newly assimilated carbon to the interaction of plants with soil in grassland and wetland ecosystems in varying environmental conditions"). The was focused on differences in leaf anatomy of plants subjected to different nutrient regimes. Stands dominated by C.acuta were studied in two localities - wetlands: Záblatské meadows with organic soil and Hamr meadows with mineral soil. Effect of fertilization was studied in areas subjected to doses of fertilizer of 300 kg NPK. ha-2 (HIGH treatment) and unfertilized areas (NO treatment). These doses were applied from 2006 to 2008, but not in 2009 because of continuous flooding. All leaves of C. acuta were hypostomatic. At Hamr, the average stomatal densities were 724 {$\pm$} 88 mm-2 and 820 {$\pm$} 130 mm-2 on the lower side of leaves of unfertilizer and fertilized plants respectively. At Záblatské louky, the average stomatal densities were 872{$\pm$}114 mm-2 and 849{$\pm$}125 mm-2 on the lower side of the leaves of unfertilizer and fertilized plants, respectively.
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The influence of the type of post - mining areas restoration on vertebrates biodiversity - the model group of birds
SOBÍŠKOVÁ, Kateřina
One way how to assess restoration success is to examine the biodiversity in the ``newly created{\crq}q areas. Birds have been chosen as indicators of biodiversity because of their ability to adapt and thus indicate the environmental quality. The aim of this study was to investigate and compare the biodiversity of birds in differently reclaimed areas of spoil heap in Sokolov Brown Coal Basin. A simple method of visual and acoustic observations was chosen, because it allows us to identify most species correctly without disturbing their populations. In total, 19 bird species were found. The wetland localities were the richest in bird biodiversity, the forestry reclaimed areas were the second and the poorest biodiversity was in agriculturally restored areas. The results show that wetlands are important not only for water regime and water quality of restored areas, but also for their biodiversity.
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The influence of increased nutrient input on rhizospheric effect in wet meadows´ soils
BURIANOVÁ, Jitka
This master thesis deals with increased nutrient input in two wet meadow ecosystems. The study sites were Záblatské louky with organic soil and Hamr with mineral soil are both located in nature protected area Třeboňsko. This study focuses on effect of eutrophication on direct counts of bacteria, as well as Ntot and Ctot concentrations in the rhizosphere and bulk soil. Changes of all measured paremeters were observed during the growing season 2006 -2007 in both sites. Fluctuation of Norg, N-NH4 and N-NO3 concentrations occurred as well.
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Retention of nutrients in floodplains
Vymazal, Jan
Nitrogen and phosphorus transformations in floodplains are manifold and very intensive. However, the intensity of the processes depends very much on climatic and geomorphological conditions and also vegetation may play very important role. Probably the most important process responsible for nitrogen removal in floodplains is denitrification which takes place in anoxic/anaerobic soil and litter layers. Substantial removal of nitrogen may also occur via accumulation in the aboveground plant biomass. This process, however, does not remove nitrogen from the system unless the biomass is harvested. The most important process responsible for phosphorus retention in floodplains is sorption on sediment particles deposited during the flood. Removal via plant harvesting may also add to phosphorus removal.
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Ekosystems services of river floodplain
Pithart, David ; Benedová, Zdeňka ; Křováková, Kateřina
The book of abstractcs contains contributions from the conference „Ecosystem services of river floodplains“, held in Třeboň, Czech republic, in april 2008. The articles deals with functions of river floodplains in the landscape, ecosystem services concept, water, nutrient and carbon retention, biodiversity, floodplain morphology and its development, hydrological aspects of river flooplains, andd water management policies and revitalizations.
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Large-scale rehabilitation in the alluvial area along the lower reaches of the Dyje River
Lusk, Stanislav ; Pražák, O. ; Lusková, Věra ; Halačka, Karel ; Vetešník, Lukáš
The Dyje River between Lednice and Bulhary was straightened, canalised, and provided with levees. Most of the alluvial area near Podivin was transformed to arable land. Due to elimination of floods, save for exceptions, areas denoted as wetlands and reed beds were qute dry for most of the year. As a result, the native fish communities typical of alluvial habitats gradually vanished from their habitats. In recent years, some 470 hectares on the left bank of the Dyje River, owned by a single private person, were transformed into a deer sanctuary. In the past two years, the arable land in that area has been gradually turned into meadows and a floodplain forest, together with restoring and enlarging the area of permanently waterlogged parts denoted as wetlands. As a result, the conditions permitting permanent occurrence of fish have been significantly improved and for a purposeful restoration of their fish communities in which native species predominate (the Carassius-Misgurnus type).
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