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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Vliv změn v lesních porostech na stav a vývoj populace mravence \kur{Formica aquilonia} na hoře Kleť
 NĚMEC, Josef
This thesis reviews the role of red wood ants (Formica s. str.) in forest ecosystems and the impact of changes in forest environment on their population. In the practical part, it investigates the impact wind-throw Kyrill and salvage logging on large nest complex of protected Formica aquilonia ants on the Kleť mountain. This is done by combining and evaluating historical data with currently collected data of the nests distribution and their characteristics. We showed that the wind throw and subsequential salvage logging decreased the number of nests only temporarily and the impacted clear-cuts were well recolonized by F. aquilonia after twelve years. Nevertheless, the nests were smaller and their future success is questionable due to still changing environmental conditions. Interestingly, a threatened xenobiont ant Formicoxenus nitidulus was found in 23 % of the F. aquilonia nest in 2019.
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Evaluation of the effects on the environment - a case study. The monitoring of bark-beetle population dynamics in the areal windbreak after Hurricane Kyrill.
 VOJÍŘ, Lukáš
My thesis deals with bark beetle in two model areas affected by disturbances in the Šumava Mountains which were caused by Hurricane Kyrill in January 2007. The localities are Černá hora and Kalamitní svážnice pod Trojmeznou. Monitoring on both of these localities was realized in a zone with no human intervention. On these two model areas population dynamics of bark beetle in areal blowdowns and spatial distribution of advance growth in the harmed area was determined. Based on the monitoring of individual localilities, we can presume population dynamics of bark beetle in the following years.
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