engleski

Floral Diversity of a Sub-Pannonic Steppic Grassland in Bistrinci

A sub-Pannonic grassland of the alliance Festucion vallesiacae in Bistrinci represents one of the last residuals of steppic grasslands in Croatia. According to the Ordinance on an Ecological Network, it is incorporated in a list of the protected areas important for the species and habitat types in Croatia under the code HR2000730. A floristic survey was carried out every two weeks in 2017 and 2018, in a period from April to November. A total of 136 vascular plant taxa from 45 families were recorded. The vascular plant taxa were determined, and a nomenclature was adjusted according to the Croatian Flora Checklist. The highest number of taxa belonged to the families of Fabaceae (19 taxa), Rosaceae (13 taxa), Asteraceae (12 taxa) and Poaceae (11 taxa). A lifeform spectrum analysis proved that the hemicryptophytes were dominant (71 taxa), followed by the therophytes (27 taxa) and geophytes (17 taxa). Among the identified taxa, 26 are protected, while one species, Dichanthium ischaemum (L.) Roberty, is strictly protected. Some invasive plant species, such as the Reynoutria japonica Houtt., Ailanthus altissima (Mill.) Swingle, and Phytollacca americana L., also occur in the grassland community. An analysis of the ecological conditions proved that the greatest number of plant taxa are shade-tolerant, preferring a relatively warm soil, moderately rich in nitrogen. The investigated steppe-like grassland in Bistrinci represents a unique habitat rich in valuable plants of the Croatian flora ; therefore, conserving this natural resource is of a great importance.

Istočna Hrvatska, stepoliki travnjak, vaskularna flora

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