Invasive Species Compendium

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Abstract

The dynamics of the occurrence of alien species on permanent research plots in the Kampinos National Park.

Abstract

The aim of the study was to assess the changes in the frequency of alien species in the Kampinos National Park (central Poland) based on 52 permanent plots established in its main plant communities. The fieldwork was conducted in the vegetation periods of 2001, 2007, 2012 and 2018. There were eight naturalized alien species and nine naturalized invasive alien species recorded within the permanent plots. The frequencies of naturalized alien species remained on a comparatively low level during the monitoring period. The species belonging to this group were gaining and losing stands. The frequency of naturalized invasive alien species was low during 2001-2012, but nearly tripled in 2018. The spread of Padus serotina, Quercus rubra and Solidago gigantea was observed. The new alien species - Erechtites hieraciifolia, appeared in 2018. In spite of the fact, that the total frequency of alien species per permanent plot nearly doubled between 2012 and 2018, it is still relatively low (0.44 species per plot). Due to its close proximity to Warsaw, urban pressure is increasing, which results in the progressive development of housing estates on the border of the Kampinos National Park and within its boundaries. This is associated with increasing tourist penetration. This will probably result in the further spread of alien species within the different plant communities.