Hniezdiace spevavce trstín a environmentálne faktory: prípadová štúdia ramena Šrek v alúviu rieky Morava

The relatively untouched character of the floodplain of the Morava River is related to the long-forbidden entry into the Slovak-Austrian border zone designated by this river. Since 1990 the area is reserved for nature protection. A lack of knowledge about breeding bird assemblages from this valuable area is a consequence. Nest monitoring of reed passerines, focusing on the occurrence of the bluethroat (Luscinia svecica cyanecula) was performed in April–July 2018 and 2020 in the riparian vegetation of a selected section of the Šrek oxbow. Relation of habitat and weather factors were studied in six recorded reed passerine species Acrocephalus schoenobaenus, A. arundinaceus, A. scirpaceus, Emberiza schoeniclus, Locustella luscinioides and Luscinia svecica cyanecula. For the target criteria species the bluethroat, nesting was also proven in 2020, with estimated density of 4. 7 breeding pairs /10 ha. Significant affinity for the open water was documented in A. arundinaceus, when the bluethroat preferred the points with broadleaved riparian banks.