The alliance Thero-Airion comprises open low-growing therophytic vegetation of recently disturbed sites on sand or gravel, usually dominated by annual grasses of the genera Aira and Vulpia. It is most common in suboceanic areas of north-western Europe, but becomes increasingly rare towards the south-eastern regions.
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Citation: Sádlo J., Chytrý M. & Černý T. (2007): Pionýrská vegetace písčin a mělkých půd (Koelerio-Corynephoretea). Pioneer vegetation of sandy and shallow soils. – In: Chytrý M. (ed.), Vegetace České republiky. 1. Travinná a keříčková vegetace [Vegetation of the Czech Republic. 1. Grassland and Heathland Vegetation], p. 321–365, Academia, Praha.