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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Bird communities in the invasive Knotweed (Reynoutria sp. div.)
 Hajzlerová, Lenka ; Reif, Jiří (advisor) ; Sedláček, Ondřej (referee)
Although it is widely recognized that exotic plant invaders can affect diversity of native plant communities, a few studies of natural systems concern about the nature abundance and diversity loss and the associated consequences for higher trophic levels. Little is known impact of exotic riparian plant on higher-order consumers, such as birds. Such is requirement to understand underlying mechanisms of invasive processes and formulating effective management strategies. We examined interaction between invasive knotweed (Reynoutria sp. div., next only knotweed) and bird communities. We recorded occurrence of birds along three rivers in riverbanks that were either dominated by native vegetation or invaded by knotweed. Birds were recorded in breeding seasons in 2011 and 2012 near town Frýdek-Místek and Valašské Meziříčí. We interested especially in (i) how knotweed composition within riparian systems affects avian communities and (ii) what common bird characteristics are influenced by knotweed. Our outcome found positive effect of Marsh Warbler (Acrocephalus palustris) and Great Tit (Parus major) in high knotweed cover and negative effect of Grey Wagtail (Motacilla cinerea). Interspecific comparison common avian characteristics suggest that knotweed invasion can impact avian abundance living in lower...
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The spread of invasive neophytes in the riverbank vegetation of Tichá Orlice river
 Hajzlerová, Lenka ; Matějček, Tomáš (advisor) ; Kindlmann, Pavel (referee)
This bachelor thesis summarizes the basic knowledge about invasive species of plants. It foccuses of characteristic and hypothetic invasive species with special focus on the neophytes growing in a riverbank vegetation. It foccuses in an appearance of invasive neophytes in riverbank vegetation in a basin of river Tichá Orlice and describes physically-geographical and socially-economical conditions. With using method MUTON (The method for complex mapping of streams and alluvium) it was mapped a chosen part of bank Tichá Orlice river. There were located chosen neophytes. We supposed that these chosen neophytes will be occur in riverbank vegetation. The most abundant plant species were - Impatiens glandulifera, Reynoutria sp., Helianthus tuberosur and Solidago sp. In comparison with other similar rivers (similar flow rate, river-basin and length), the Tichá Orlice river belongs to the above-average affected watercourse.
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