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Diverzita obojživelníků (Amphibia) a jejich antropogenní ovlivnění na vodních plochách v oboře Holedná
Dokulilová, Martina
In the spring 2014 was observed species numbers and species diversity of amphibians (Amphibia) on six selected water surfaces in a Holedna game preserve, which is located in Brno territory. To determine the numerical and species representation was used a visual method. In total, there were found 5 species in the monitored locations: Smooth Newt (Lissotriton vulgaris), Common Toad (Bufo bufo), Common Frog (Rana temporaria), Agile Frog (Rana dalmatina) and European Tree Frog (Hyla arborea). During the observation, from 18th March to 13th July, there were recorded the numbers of individual amphibians species (Amphibia) and then these data were used to calculate the synecological characteristics (dominance, species diversity, equitability, Jaccard similarity coefficient). Altogether, the most plentiful species was Common Toad (Bufo bufo) and least plentiful species was Europian Tree Frog (Hyla arborea). Representation of individual species in the monitored area was not balanced in relation to species number. Predominant occurrence of eudominant species on the all water surfaces points out to disturbed or artificial biocenosis. Based on observation was evaluated anthropogenic influence, where fragmentation, absence of rainfall, forest management and an admission of the game preserve can be included. Subsequently, the appropriate solutions to increase species diversity were designed.
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