National Repository of Grey Literature 34 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Heritage evaluation of artistic stucco: The methodology deals with professional approaches to the conservation and restoration of artistic stucco, its value framework and theoretical problems of its restoration and presentation within the architectural context
Fiřt, Jan ; Kuneš, Petr ; Skalický, Petr
The methodology deals with professional approaches to the conservation and restoration of artistic stucco, its value framework and theoretical problems of its restoration and presentation within the architectural context. The introduction of the methodology presents the general characteristics of the stucco works care against the background of institutionalised monument care and describes the roles of involved persons in the process of preparing the concept of restoration intervention. In the following sections, the historical development of stucco in the European and Czech context is briefly outlined and a basic overview of the most common stucco techniques and materials is given. The next part of the methodology focuses on the survey procedures and methods used to characterise the work itself, its composition, techniques and materials, as well as to identify its damage, deterioration and secondary interventions, aimed at an overall assessment of the condition of the work. The core chapters of the methodology are devoted to the preparation of the restoration intervention, which is based on the monumental assessment of the specific work and the objectives of the intervention formulated in the given context. The preservation of the heritage values of the work is emphasised, but the legitimate perspectives of other stakeholders in the restoration process are also reflected. The final chapter of the methodology presents selected partial risks associated with older restoration inputs that are problematic from the point of view of today's monument care. The examples given, illustrated with photographs of real stucco works, deliberately depart from the context of complex and period-specific interventions and aim to present the risks associated with some of the existing approaches to restoring stucco monuments.
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Changes in nutrient availability imprinted in long-term diatom succession in lakes
Tichá, Anna ; Kuneš, Petr (advisor) ; Magyari, Enikő Katalin (referee) ; Catalan, Jordi (referee)
An examination of primary production in lakes shows regular trends during the Late Glacial and the Holocene periods: an increase ('eutrophication') and a decrease ('oligotrophication') usually connected with the input of terrestrial organic matter ('dystrophication'). Although nutrient availability usually influences production, other abiotic and biotic factors enter lakes' complex ontogeny, such as light availability, mixing regime, pH level, mechanical disturbance, predation or competition. Consequently, the past relationship between nutrient availability and primary production contains important information about the drivers of ecosystem functioning in the past. The reconstruction of past processes relies on the sensitive response of aquatic organisms to environmental changes. Their subfossil remains record the dynamic processes in the sediments and reveal both the local lacustrine history and more global events. Among other organisms, diatoms fulfil their function as a valuable proxy of past physical and chemical properties of water bodies. Whereas the record of planktonic diatom species dynamics represents the general ecosystem condition, variations in species-rich littoral periphytic diatoms add necessary insight into finer environmental fluctuations. The presented research combines...
Relationship between pollen diversity and floristic diversity - utilization for study of the past
Koďousková, Lucie ; Kuneš, Petr (advisor) ; Prach, Jindřich (referee)
This thesis deals with the relationship between palynological diversity and floristic diversity. Diversity is complex quantity, which consists of a number of species, the number of individuals and relative frequency of species known as evenness. It characterizes the diversity at the species level, genetic level or within communities. Its relationship with palynological diversity is problematic, especially because of lack of taxonomic precision in palynology, species-specific differences in pollen production and dispersal and sample size, since the number of taxa increases with sample size. The thesis also focuses on the studies which tried to prove positive correlation between palynological and floristic diversity, including techniques used. The second part describes methodology of collecting vegetational and palynological data and the treatment of sampes.
Anthropogenic impact on landscape transformation and vegetation changes reflected in pollen spectra from Central-Eastern Europe.
Jamrichová, Eva ; Kuneš, Petr (advisor) ; Dreslerová, Dagmar (referee) ; Marinova, Elena (referee)
The present thesis focuses on the impact of human communities on postglacial vegetation changes and landscape transformation in the region of Central-Eastern Europe. The main aim of the study was to evaluate how past human activities are reflected in pollen spectra from different types of mostly small-sized sites. Since the Middle Holocene onwards, human impact contributed to the formation and spread of various types of open habitats, altered the vegetation composition by introducing new species, influenced forest structure and supported the acceleration of geomorphic processes such as soil erosion or sediment accumulation. Human-induced alteration of the landscape cover and vegetation composition is reflected in pollen spectra, but it is often difficult to identify. Considered as direct evidence of human activities are the presence of pollen grains of cultivated plants in pollen spectra. Besides, there are several indirect traces of human impact on the landscape such as the spread of secondary anthropogenic indicators (apophytes), fluctuation in pollen curves of trees as a consequence of change in landscape cover or woodland composition, increases of micro-charcoal particles due to human-induced fire or erosion processes. Chapter 1 presents confirmation of the assumption that Neolithic human...
Postglacial vegetation history of local phenomena in western Bohemia
Švarcová, Markéta Gabriela ; Kuneš, Petr (advisor) ; Kozáková, Radka (referee)
In the sense of postglacial vegetation development, western Bohemia represents one of the least studied regions in the Czech Republic. This area, however, represents a supposed migration route of trees towards northern Europe during the Holocene. The most appropriate area for testing of such proposal might be western Sudetes with Slavkovský les protected landscape area in the Karlovy Vary region. Postglacial vegetation history was studied on the basis of two sedimentary profiles - from the fen bog near Číhanské prameny springs and from the vicinity of Mnichovské hadce serpentines from the nature reserve Mokřady pod Vlčkem. Percentual as well as influx diagrams were constructed on the basis of results of standard pollen analysis. Comparison of these results with the data from other suitable profiles enabled reconstruction of migration history of main tree taxa. The Číhaná profile reflects the period from the Older Dryas up to the Atlantic. The oldest Holocene forest was formed by the dominant Pinus, while Corylus was joining already in the Preboreal. Quercetum mixtum folowed in the begining of the Boreal and spruce quickly gained dominance in the Atlantic. The sedimentation process was probably finished due to rapid accumulation of sediments followed by spontaneous drainage ending with spruce and alder...
Dental phenotype variation in voles during the present glacial cycle
Putalová, Tereza ; Horáček, Ivan (advisor) ; Kuneš, Petr (referee)
The phenotype dynamics of arvicolid rodents during the terminal stages of the Vistualian glacial and the earliest Holocene was investigated with aid of a detailed morphometric analyses of extensive dental material from three sedimentary series of that age. The particular attention was paid to the record from a section in Býčí skála cave, Moravian karst, which demonstrated details of the Pleistocene/Holocene transition (12.4-8.4 ky BP) with extraordinary resolution. It revealed that dramatic rearrangements in community structure were accompanied by significant rearrangements of the phenotype dynamics in all arvicolid species. Despite some trends specific for particular species, some common features were identified as well. One of them was a rapid turnover in phenotype structure by the end of Younger Dryas, at time of the Preboreal event. (11.7-11 ky BP), the other was associated with the extensive shifts in community structure and habitat diversity at terminal stage of the Preboreal (9.7-9.3 ky). The core arvicolid species of Preboreal communities, Clethrionomys glareolus, Microtus arvalis, M.agrestis and Arvicola terrestris, exhibited repeated fluctuations during that stage (ll-9,3 ky BP) both in abundance and phenotype characteristics, supposedly related to serial invasion events during that time....
Human-driven and natural vegetation changes of the last glacial and early Holocene
Kuneš, Petr ; Pokorný, Petr (advisor) ; Krahulec, František (referee) ; Ammann, Brigitta (referee)
Conclusions The main conclusions, specific to each research topic, have been mentioned in appropriate chapter. To summarize, the thesis brings new original data and reinterprets existing pollen assemblages of the last glacial and early Holocene in central Europe. It also deals with analysis of the analogues and with vegetation-pollen relationship when interpreting past vegetation. The study of analogue environment brought several important conclusions. A considerably tight relationship was found between the composition of pollen spectra and climate characteristics in southern Siberian analogue landscape. This means that past climatic conditions can be reasonably predicted by the fossil pollen spectra. There were found the best pollen predictors (such as Pinus sylvestris, P.cembra, Betula alba, Artemisia, Graminae) and 300 m distance around the sampling point as the best factors explaining vegetation type. Vegetation was interpreted for the last glacial and the beginning of the Holocene in the light of new palaeobotanical finds and according to modern approaches. Occurrence of some tree species during various stages of the last glacial were confirmed, however, local discrepancies in vegetation and climate were also highly important. This supports strong gradient in increasing treelessvegetation from the...
History of vegetational development in the Cheb basin from sedimentary record of the SOOS National Nature Reserve
Suda, Tomáš ; Kuneš, Petr (advisor) ; Bešta, Tomáš (referee)
Vegetation development in the Cheb basin ( W Czech Republic) recorded in the sediments of the SOOS ational ature Reserve This thesis focuses on palaeoecological research of quaternary sediments in the Soos National Nature Reserve (Cheb basin, NW Czech Republic). Quaternary history of this locality is poorly known, despite it is a valuable and protected area with high natural qualities. The Soos basin is also known for its unique geological record, which is expected to cover information on landscape dynamics at least during the Holocene. A lake existed in the Soos basin enabling accumulation of diatomite and peat sediments of a broad palaeoecological potential. Records were analysed with method of pollen analysis and were dated using 14C. The results of this study bring information about vegetation development in the area of Cheb basin as well as development of lake ecosystem. It also gives a new insight on lake's origin and its age. The accumulation of peat sediments started in the Preboreal period and was continuous at least until the Atlantic following with a hiatus, therefore further detection of vegetation development is impossible. The beginning of diatomite accumulation, as well as the existence of the lake goes back to the Bølling interstadial, according to radiocarbon dating. However, this...

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