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Factors threatening European raptors and actions for their conservation
Žandová, Denisa ; Reif, Jiří (advisor) ; Sedláček, Ondřej (referee)
Due to their visual appearance and general size, raptors are, among a general public, revered group of animals. This also, brings them more attention in sphere of animal conservation. Despite protection, which is given to them, raptors are among other birds severely endangered with their population decreasing in multiple places across Europe. The most frequent factors, which endenger raptors, are habitat loss, poaching, high-voltage powerlines, wind turbines and lead poisoning. This paper focuses on, describtion of methods of raptor protection, determination of efective protection measures, as well as determination of new useful solutions applicable for protection improvement. Studies has shown that in individual areas of Europe are endengering factors diferent than in others. Species with same ecological requirements and a way of life are endangered by same factors. The approach to these issues also changes depending on a country and some potential factors are not examined enough, yet. Thus it is of a great importance to spend more time on resolving these issues. Keywords: raptors, biodiversity conservation, risk factors, habitat loss, lead poisoning, poaching
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The influence of land cover and its change on distribution and species composition of raptors in the Czech Republic
Černá, Hana ; Chuman, Tomáš (advisor) ; Romportl, Dušan (referee)
The Influence of Land Cover and Its Change on Distribution and Species Composition of Raptors in the Czech Republic Abstract Bird species diversity and distribution in relation to a variety of factors have been the subject of numerous works. So far, none of these studies have dealt with an individual order of birds, and this is why I decided to undertake this type of research. The main theme of my work is the extent to which land cover and particularly its perpetual changes influence the local species of raptors. In the introductory part, I outline the character of the changes on the territory of the Czech Republic in the years 1970-2000 and describe their influence on the distribution and diversity of raptors. An analysis of historical and current data concerning the above mentioned period follows, the chief objective being to evaluate all the aspects of dependence of raptors on the past and present state of the landcover in the Czech Republic. The dependence of diversity of raptors on the diversity of land cover has been proved.
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Vliv fragmentace a ztráty habitatu na primáty
Sniegon, Arthur F. ; Sedláček, Ondřej (advisor) ; Pluháček, Jan (referee)
Anthropogenic activities and human encroachment may cause profound and often irrevocable changes in an environment. This may result in challenges for most of the wildlife, including our closest extant relatives, non-human primates. Worldwide, primates may be particularly susceptible to human-induced habitat alterations owing to their large body size, social way of life, slow reproduction, large home-ranges, naturally low population densities and often strong dependence on forest cover. Three main phenomena have been described as major threats for primates: loss of the natural habitat and its conversion to human-dominated landscape, fragmentation of the remaining patches of suitable habitat, and commercial bushmeat hunting. Here I review the first two processes. If primates survive the initial disturbance, they are forced to adjust their demographic, behavioural and dietary traits. However, this may not be enough for their persistence in a long term as their genetic diversity might be compromised. Moreover, also parasitic infections may impact severely the disrupted populations. In this thesis, I reviewed the current knowledge in primates demography, population genetics, dietary changes and parasite interactions in altered habitats. Most of the studies examined the African continent and Latin America, a...
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