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Importance of flood drifts of the Ohře River for the study of alluvial mollusc communities
Ratajová, Michaela ; Juřičková, Lucie (advisor) ; Čejka, Tomáš (referee)
When water levels are increased, for instance in case of spring thaw and summer floods, various materials including terrestrial gastropods are pulled down from shores by water. This accumulated material is called flood drift and when interpreted accurately, its composition can provide useful information not only from faunistic point of view. In the past, flood drifts were used to supplement faunistic research of various areas, since it helps to reveal species which are difficult to detect using regular methods. This is also the case of the river Ohře. For the dynamics of molluscan association, water is a significant corridor connecting very similar places. I have attempted to verify, whether it is transported via a river bed, i.e. via stream corridor by means of flood drifts. The results of this theses confirm that gastropods are able to survive in the watercourse and cling several hundred metres down the stream. Thus we talk about short distance spreading. This transport is used by various terrestrial gastropods; however, bigger gastropods are much more likely to survive.
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Importance of flood drifts of the Ohře River for the study of alluvial mollusc communities
Ratajová, Michaela ; Juřičková, Lucie (advisor) ; Čejka, Tomáš (referee)
When water levels are increased, for instance in case of spring thaw and summer floods, various materials including terrestrial gastropods are pulled down from shores by water. This accumulated material is called flood drift and when interpreted accurately, its composition can provide useful information not only from faunistic point of view. In the past, flood drifts were used to supplement faunistic research of various areas, since it helps to reveal species which are difficult to detect using regular methods. This is also the case of the river Ohře. For the dynamics of molluscan association, water is a significant corridor connecting very similar places. I have attempted to verify, whether it is transported via a river bed, i.e. via stream corridor by means of flood drifts. The results of this theses confirm that gastropods are able to survive in the watercourse and cling several hundred metres down the stream. Thus we talk about short distance spreading. This transport is used by various terrestrial gastropods; however, bigger gastropods are much more likely to survive.
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The role of stream-corridors for the speading of invertebrates in the landscape
Ratajová, Michaela ; Juřičková, Lucie (advisor) ; Čejka, Tomáš (referee)
The characteristic environment along riverbeds forms corridors, which can be used by numerous organisms for their dispersion - stream corridors. Water is a useful medium of transportation, especially for the species with low dispersion abilities, such as annelids, molluscs and several arthropods. The terrestrial animals nearby the water flows are often adapted to the survival in the water. They are able to survive short term inundation, or reproduce very quickly to renew their abundances. However, well documented cases of the species spreading along the rivers are rather rare. Most of them are molluscs species. The banks of the Vltava, Berounka or Sázava rivers are colonized by the snail Arianta arbustorum. There is evidence of the spreading of annelids along some European rivers. Such examples, together with the various adaptations to survival of inundation suggest that the stream corridors really work as a spreading device.
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Managerial competence
RATAJOVÁ, Michaela
The aim of this thesis is to characterize key managerial competencies and choose the appropriate methods for their detection with subsequent evaluation and describing the current level in management. On the basis of this evaluation then suggest appropriate procedures selected for further development of managerial competencies. The work is divided into two parts. The theoretical part includes theoretical knowledge, which is difficult to weigh. In this part I will pay particular attention to the definition of a manager, we explain the notion of competence, competency measurement, types of competence. The literature review follows their own work. The practical part contains information about which competencies managers operate. Based on the information obtained is an overall evaluation, and then proposed the possibility of further development.
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