Communities with Ambrosia artemisiifolia L. in the Kursk Region

The purpose of this study is to characterize plant communities with Ambrosia artemisiifolia in the Kursk Region. The work is based on 32 relevés made by the author in the city of Kursk and few district centers­ of the Kursk Region in 2009–2018. Some information about natural conditions of the Kursk Region is given in Table 1. Classification is carried out according to Braun-Blanquet approach. The data were treated by IBIS 7.2 software package (Zverev, 2007). The names of the higher syntaxa follow to «Vegetation of Europe…» (Mucina et al., 2016). Synoptic tables include only species with a constancy above I. Ecological conditions (soil moisture, richness in mineral nitrogen, light) were assessed with the use of average values by H. Ellenberg et al. (1992) ecological scales while hemerobiality with use of average values by N. G. Ilminskikh (1993) ecological scale and processed by IBIS software (Zverev, 2007). 4 associations of 3 classes of vegetation were revealed. Communities with Ambrosia artemisiifolia and hygrophilous species are described in Serbia (Jarić et al., 2011) wh ere subass. Chenopodio–Ambrosietum artemisiifoliae bidentetosum Jarić et al. 2011 was recorded in abandoned fields. It is differentiated by biennials and perennials from classes Artemisietea vulgaris and Molinio-Arrhenatheretea and others (Table 10). The features of communities with Ambrosia artemisiifolia identified in this work are important for the development strategies to combat this dangerous plant.