Ordination of plant communities of the Stony Steppe in the Samara Volga region

Rare plant communities in need of protection are formed in the rocky locations of the Samara region with a high abundance of narrow-localised endemic species: Thymus zheguliensis Klokov et Des.-Shost., T . dubjanskyi Klokov et Des.-Shost., Globularia punctata Lapeyr. From the perspective of the Brown-Blanke approach, plant communities are characterized: Thymus zheguliensis-Stipa pennata , Thymus zheguliensis-Koeleria sclerophylla , Artemisio salsoloidis-Thymetum dubjansky , Gypsophil volgensis-Thymetum dubjanskyi , Globulario punctatae-Helictotrichetum desertorum , Globulario punctatae-Thymetum marschalliani , Thymus zheguliensis-Festuca valesiaca , Globularia punctata-Festuca valesiaca . The DCA-ordination of the provisions of the relevés of plant communities and the correlation with the indicators of the ecological scales of L.G. Ramensky is given. The floristic and ecological features of the studied communities of the rocky steppe are revealed.