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Effect of environmental variables on diversity and abundance of water bird species
Adam, Matyáš ; Romportl, Dušan (advisor) ; Chuman, Tomáš (referee)
Effect of environmental variables on diversity and abundance of water bird species Abstract The environmental variables affect the abundance of species and individuals of most living organisms significantly. The intensity of environmental changes can be evaluated by using bioindicators. The birds rank among them. The most significant variables of the wide range of abiotic, biotic and anthropogenic factors are likely change of habitat structure and quality and climatic changes. In this thesis there is addressed issue of the impact of these factors in the model group of organisms - water birds. The first part is devoted to the characteristics of the impact of environmental variables on the abundance and species diversity of birds by the research of available literature. The relevant data are processed in the second part. There is carried out basic analysis of major environmental factors affecting the diversity and abundance of waterfowls at locations of interest. Keywords: environmental variables, climate change, land cover, habitat structure, biodivesity, waterfowls
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Waterfowl and human disturbace
Klaudisová, Lucie ; Musil, Petr (advisor) ; Sedláček, Ondřej (referee)
The movement of people in the countryside has considerably changed in recent decades. A man occurs in places where he previously didn't and do things that previously couldn't do. It is for example about the rapid growth of ecotourism and various kinds of sports, from water sports to sports hunting or increased traffic. Waterbirds are for their size and way of life easy target for finders of binoculars and cameras. Effect of these on numbers, distribution and behaviour of waterbirds, it is not in the interest of mentioned people. Education, training and implementation of various conservation or restrictive measures, is often the only way how to protect the birds from negative human impact. Currently there are many researches focusing on the impact of different types of human disturbance. There arise any recommendations how to reduce the impact of these activities. Examples of different types of disturbance and its effect on water birds as well as its effect on animals during recurring activities are summarized in this study.
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Effect of environmental variables on diversity and abundance of water bird species
Adam, Matyáš ; Chuman, Tomáš (referee) ; Romportl, Dušan (advisor)
Effect of environmental variables on diversity and abundance of water bird species Abstract The environmental variables affect the abundance of species and individuals of most living organisms significantly. The intensity of environmental changes can be evaluated by using bioindicators. The birds rank among them. The most significant variables of the wide range of abiotic, biotic and anthropogenic factors are likely change of habitat structure and quality and climatic changes. In this thesis there is addressed issue of the impact of these factors in the model group of organisms - water birds. The first part is devoted to the characteristics of the impact of environmental variables on the abundance and species diversity of birds by the research of available literature. The relevant data are processed in the second part. There is carried out basic analysis of major environmental factors affecting the diversity and abundance of waterfowls at locations of interest. Keywords: environmental variables, climate change, land cover, habitat structure, biodivesity, waterfowls
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Long-term changes in numbers of selected waterbirds in different types of wetlands
Šenkýřová, Adéla ; Musilová, Zuzana (advisor) ; Vojar, Jiří (referee)
The aim of this study is an analysis of long-term changes in numbers of 28 selected waterbird species wintering at 4 different types of wetland refuge sites (reservoirs, fishponds, industrial waters and running waters) monitored within the International Waterbird Census between 1966 and 2015. We aimed to evaluate the pattern in water type preference and determine if there is a difference in number trends of particular species at different refuge sites types and if there are any variations according to the presumable existence of density dependance at wintering refuge sites.
Results showed an increasing preference in waterbirds wintering at industrial waters (sandpit and gravel lakes, industrial settling ponds) over running waters. Rather herbivorous, benthivorous and omnivorous species than pescivorous species prefer industrial waters, which is probably caused by a lower concentration of fish in industrial waters than in other water types. Waterbird species of lower count numbers and northern species showed a higher preference for wintering at reservoirs over running water sites. The preference change leads to the density dependence of wintering sites confirmation.
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