Abstract
This study was carried out to investigate vascular host plant distribution in the hydrographical basin of the Otăsău River (Vâlcea County, in the Central Southern part of Romania). In order to determine the existing species in this area, fresh and dry material were collected. Specie identification was made based on a repetitive observation of the plants. A taxonomical aid was used to identify the species and classify them into different categories. In this research 368 taxa were investigated and registered as host vascular plants for pests from the studied area. The geoelement analysis shows that Eurasian, European, Central European, Cosmopolite and Circumpolar elements are predominant. Concerning the bioform spectrum the most representative components of the herbaceous layer are hemicryptophytes with 127 taxa. The study reveals that the studied area presents a high floristic diversity of the vascular plants (about 10% of the Romanian flora).
Highlights
The analysed territory is located in the middle part of VâlceaCounty, in the Sub-Carpathian region of Oltenia, Romania; its northern limit is represented by the southern part of Buila Vânturariţa National Park, while, in the south, is limited by Băbeni town, where the Otăsău River flows into the Bistriţa River (Fig. 1).The influence of the milder climate characteristic to Oltenia is quite obvious within the analysed territory, especially in the case of the southern slopes.The hydrographical network is represented by the Otăsău River, which stems from Muntele Piatra/Stone Mountain (1581 m); it gathers the streams from the southern slopes of Piatra and Albu Mountains (Bulzului Valley, Pătrunsa Valley) and flows from north-west to south-west and, it flows into the Bistriţa River, within Frânceşti settlement
In the Sub-Carpathian region of Oltenia, Romania; its northern limit is represented by the southern part of Buila Vânturariţa National Park, while, in the south, is limited by Băbeni town, where the Otăsău River flows into the Bistriţa River (Fig. 1)
The research was carried out in the lower basin of the Otăsău River, that revealed the presence of numerous vascular plants (368 taxa) that are possible host species for the pests occured in the area
Summary
The analysed territory is located in the middle part of VâlceaCounty, in the Sub-Carpathian region of Oltenia, Romania; its northern limit is represented by the southern part of Buila Vânturariţa National Park, while, in the south, is limited by Băbeni town, where the Otăsău River flows into the Bistriţa River (Fig. 1).The influence of the milder climate characteristic to Oltenia is quite obvious within the analysed territory, especially in the case of the southern slopes.The hydrographical network is represented by the Otăsău River, which stems from Muntele Piatra/Stone Mountain (1581 m); it gathers the streams from the southern slopes of Piatra and Albu Mountains (Bulzului Valley, Pătrunsa Valley) and flows from north-west to south-west and, it flows into the Bistriţa River, within Frânceşti settlement. Host Vascular Plants for Pests in the Hydrographical Basin of the Otăsău River, Romania This study was carried out to investigate vascular host plant distribution in the hydrographical basin of the Otăsău River (Vâlcea County, in the Central Southern part of Romania).
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