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Growth of the common reed (\kur{Phragmites australis}) in a selected constructed wetland used for wastewater treatment.
MOULISOVÁ, Lenka
The Bachelor{\crq}s thesis is a part of the Project of GACR 206/06/0058 Monitoring the heavy metals and the selected risk elements in a waste water cleaning process in artificial wetlands. This work is aimed at evaluating the growth characteristics of the common reed, Phragmites australis, in a constructed wetland used for wastewater treatment. A destructive method was used for sampling. The samples were taken in the inflow and the outflow parts of the vegetated bed in one vegetation season. The aboveground biomass was determined from six samples taken in the inflow and outflow part of the vegetated bed, respectively. The belowground biomass was determined from two samples taken in the inflow part and two samples taken in the outflow part. The mean total aboveground biomass (estimated in August 2007) was 1296 g.m-2 and 1105 g.m-2 in the inflow and outflow part, respectively. The mean live belowground biomass was 1729 g.m-2 and 2161 g.m-2 in the inflow and outflow part, respectively.
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Hodnocení růstu a struktury biomasy Pinus radiata v subtropických a tropických oblastech
Václavíková, Dana
Pinus radiata is a very suitable plantation tree species in subtropics and tropics. This work summerizes allometric equations for predicting biomass of Pinus radiata for tree components, whole tree and forest stand. Furthermore this work includes the evatluation of growth and also compare the structure of radiata pine´s biomass in different countries of subtropics and tropics. The rate of growth is significantly influenced by abiotic factors.
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Optimalizace technologického procesu zpracování dat leteckého laserového skenování pro výpočet zásob lesních porostů
Patočka, Zdeněk
Airborne laser scanning has already become an essential part of forest inventories in the Nordic countries and in Canada. However, its wider practical forestry application in the Central European countries is awaiting. In the first part of this thesis, a procedure for modelling of the basic stand variables, especially forest stand volume, was designed using an area-based approach. Not only linear regression was used for modelling but also machine learning (k-nearest neighbor algorithm, Random Forest, Support Vector Machine and neural networks). In the second part, the thesis deals with biomass estimation using the area-based approach and with comparison of the empirical and semi-empirical approaches to modelling. The third part deals with leaf area index (LAI) estimation using penetration indices and LiDAR metrics. The eLAI estimated by optical method is commonly used for model fitting in overwhelming majority of scientific papers. The benefit of this study is usage of LAI derived by destruction method (directly). The thesis as a whole has shown that the airborne laser scanning is also usable in a variety of forestry applications in Central European countries.
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Assessment of the sequestration capacity of vegetation by remote sensing methods in areas of reclaimed mining dumps
PIKL, Miroslav
The study aims at estimation and mapping the amount of carbon allocated in above ground biomass of wood and in organo-mineral soil horizon at sites where reclamation and spontaneous succession took place on spoil heaps after coal mining. Several categories of data have been used to meet the objectives, namely ground field measurements, laboratory analyses of soil samples, airborne hyperspectral data from VNIR region, and airborne LiDAR scanning data. The digital imagery analysis, GIS modeling and multivariation statistical methods were applied in data assessment. The results show that there is a 7 600 tons of carbon allocated in above ground wood biomass in the area of 209 ha, and 8 100?12 200 tons in the soil A horizon in the region of the same size. The results proofed: 1/ statistically significant negative relationships (p < 0,01) between slope and amount of soil carbon, where higher negative correlation was for broad leaved species; 2/ statistically significant difference (p < 0,05) between amount of soil carbon under broad leaved and needle classes and under different species, the highest between soils under Alnus sp. and Pinus sp.; 3/ statistically significant relationships (p < 0,05) between the amount of carbon allocated in the aboveground wood biomass and that in the soil A horizon under the needle leaved class and under the spontaneous wood vegetation.
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Dynamics of aboveground biomass of a sedge fen
HAŠEK, Ladislav
This thesis is part of Project of the Grant Agency of the Czech Republic No P504/11/1151, focused on the role of plants in the balance of carbon dioxide and the other greenhouse gases produced in the ecosystem of a sedge fen, which is situated on the study site Wet Meadows near Třeboň. The thesis deals with the growth dynamics of the dominant sedge, Carex acuta. The samples were taken using the method of successive harvests near the automatic meteorological station of Czech Globe, Academy of Sciences of the Czech Republic. During the growing season nine harvests were accomplished on 25.3, 15.4, 6.5, 5.6., 9.7., 5.8., 9.9., 21.10., 25.11.. On each date eight replicates were taken, i.e., a total of 72 samples within the vegetation season. The seasonal dynamic of the above ground biomass was compared between C. acuta and the other plant species on the experimental area. Both live and dead biomass, was harvested and subsequently sorted to single botanic species, dried, weighed and the values were processed using the MS Excel tables. The seasonal maximum of aboveground biomass of all plant species (both live and dead parts) was found on 9.7. (1452,72 g.m-2). Among plant species the highest values of aboveground biomass were attained by Calamagrostis canescens (1257,93 g.m-2) and C. acuta (1163,49 g.m-2). C. acuta displayed the highest density of all shoots on 15.4 (300 m-2),and the highest average weight of one shoot. The maximum length of the longest live shoot of Carex acuta was very consistent among the measurememnts.
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Assessment of phenotypic variation of commercial cultivars and wild populations of Phalaris arundinacea in experimental conditions
JANUŠ, Vojtěch
The bachelor thesis is part of the project AMVIS 20-LH 11039. This work is aimed at evaluating the growth characteristic and phenotypic variation of wild populations and commercial cultivars of Reed canary grass (Phalaris arundinacea) in experimental conditions. Within the frame of this project an experiment was established at the Institute of Botany in Třeboň. Within the Bc Thesis, morphological characteristics of the studied plants were investigated during the vegetation period, 26.6.?18.9.2012. A destructive method was used for aboveground biomass sampling at the end of experiment. Plants from native populations had higher values of studied characteristics than commercial cultivars. The highest value of aboveground biomass had population from the area of Dyje river (433 g).
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Effect of simulated eutrophication on primary production of a marginal wetland
TOUPAL, Michal
This Bc. Thesis is part of Project of the Grant Agency of the Czech Republic No. 526/09/1546 entitled ?Importance of newly assimilated carbon for the plant-soil interactions in wet grassland ecosystems in varying environmental conditions?. The aim of the thesis is to estimate the abovground production of a graminoid wetland stand in the Nature reserve Záblatské louky in the Třeboň Basin Protected Landscape and Biosphere Reserve. The work also includes assessment of the effect of several years of fertilization on the plant species composition and the aboveground biomass. The aboveground biomass was sampled at three sampling dates in 2012. A total of 24 samples was taken at each sampling date on plots receiving different levels of fertilizer. The treatments included a high degree of fertilization, an intermediate degree of fertilization and no fertilizer addition. The samples were taken from quadrats of 0,5 x 0,25 m. The biomass values were then expressed per a unit area (1 m2). The highest average values of total aboveground biomass (521,56 g.m-2) were found for non-fertilized plots. Unfertilized plots reached an average value of total aboveground biomass of 480,37 g.m-2. The lowest average value of total aboveground biomass (434,85 g.m-2) was found for the treatment receiving high fertilization. The highest average value of aboveground biomass (652,15 g.m-2) was found for unfertilized plots on the 3rd sampling date. The results showed a statistically significant effect of fertilization on the biomass of Eriophorum angustifolium and mosses.
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Dynamics of aboveground biomass of a sedge fen
HOVORKA, František
This thesis is part of Project of the Grant Agency of the Czech Republic No P504/11/1151, focused on the role of plants in the greenhouse gas budget of a sedge fen. The thesis deals with the growth dynamics of the dominant sedge, Carex acuta L., on the study site, Wet Meadows near Třeboň, Czech Republic. The seasonal changes in aboveground biomass were followed using successive harvests during vegetation seasons of 2010 and 2011. The seasonal maximum of aboveground biomass of Carex acuta L. (both live and dead parts) was 321,44 g.m-2 and 357,97 g.m-2 in 2010 and 2011, respectively. The seasonal maximum of total aboveground biomas sof all species was 558,22 g.m-2 and 522,38 g.m-2 in 2010 and 2011, respectively. The seasonal maximum of shoot density was 485 ks.m-2 and 435 ks.m-2 in 2010 and 2011, respectively.
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Effect of eutrophication on primary production of a herbaceous wetland
BORDOVSKÁ, Monika
This work is part of a study of wet meadows within the project GA CR 526/09/1545. The objective of the project is to determine the importance of newly assimilated carbon for the plat-soil interactions of plants with in wet grassland ecosystems in changing environmental conditions. As part of this project, a wet grassland ecosystem near Hamr situated in the Nežárka river floodplain was assessed in terms of aboveground production. This work includes data from 2010 and 2011. Each year the biomass was sampled two times. At each sampling, 24 samples were collected from plots differing in the intensity of fertilization. The treatments included high intensity of fertilization, low intensity of fertilization and no fertilization. In 2010, the annual production of aboveground biomass was 863.88 gm-2 on plots with a high intensity of fertilization, 788.46 gm-2 on plots with low intensity of fertilization and areas 839.69 gm-2 on unfertilized plots. In 2011 the annual production of aboveground biomass was 1149.71 gm-2 on plots with high fertilization, 953.73 gm-2 in plots with low fertilization, and 930.25 gm-2 on plots without fertilization.
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Aboveground production of an unmown wetland stand
HOVORKA, František
The bachelor thesis is part of the project of The Ministry of Environment no. SP/2d1/9307 (Czech Terra). The aim of this project is evaluation of the carbon budget in main ecosystem types in the Czech Republic. The thesis is focused on the production of aboveground biomass of a stand dominated by Carex acuta. Thje seasonal dynamics oc the aboveground biomass was estimated by repeated destructive harvests. The highest value of Carex acuta biomass (alive and dead) was 364,63 g.m-2 on 13 August. The maximum total aboveground biomass in m2 (alive and dead biomass of Carex acuta and other plant species) was 506,76 g.m-2. The highest value of the numer of C. acuta tillers was 424 pieces/m2.
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