Zbiorowiska roślinne upraw okopowych Wigierskiego Parku Narodowego

Abstract

Two associations were identified in the agrocenoses of the WNP tuber crops: one community, characterised by the occurrence of characteristic species from the alliance Panico-Setarion, and two associations: Veronico-Fumarietum officinalis and Galinsogo-Setarietum. The syntaxons identified were internally diverse and divided into lower phytosociological units classified as variants. Patches of the community with species of the alliance Panico-Setarion usually established on light soils. Their appearance was mainly affected by acidophilous species, such as Setaria viridis, Setaria pumila, Spergula arvensis and Anthemis arvensis. In some patches more nitrophilous weeds were found with a high cover, including Matricaria maritima subsp. inodora, Chenopodium album, Viola arvensis and Stellaria media. Patches of Veronico-Fumarietum officinalis with a high share of characteristic species and indicators of this association, that is Fumaria officinalis, Lamium amplexicaule, Veronica agrestis, Veronica persica and Anchusa arvensis, were established in tuber crops cultivated on fertile soils, mainly proper brown or grey brown podzolic soils. Patches of the association Galinsogo-Setarietum were established in habitats in the proximity of buildings. They were characterised by a mass occurrence of Galinsoga parviflora and Galinsoga ciliata, the latter one being less frequent. Nitrophilous species also had a high cover in these patches. They included Chenopodium album, Stellaria media and Polygonum lapathifolium subsp. lapathifolium. Higrophilous species, e.g. Mentha arvensis and Bidens tripartite, were found is some patches, too.