Man-Made Changes in the Flora and Vegetation of Poland: Current Review

This paper presents the main directions and range of man-made changes to the vascular flora and their effects at the vegetation level. The native flora of Poland, located in the temperate zone of Central Europe, comprises approximately 2639 species. The effect of human pressure, which began in the Neolithic and has intensified in the last 200 years, has caused changes in the native flora and has included an inflow of 975 alien species, 560 of which have become permanently established. Currently, at least 704 native species are recognized as endangered, and only 623 are recognized as being able to occupy habitats that were created or strongly transformed by humans. Native species (apophytes) and aliens (anthropophytes) have co-created completely new plant communities in these habitats. Among the alien plants, neophytes (399 species) outnumber archaeophytes (161 species). Additionally, many neophytes (123 species) can penetrate seminatural and natural communities. Research has shown that the proportions of apophytes, alien plants, and declining species can be used to clearly differentiate plant communities and be used as an indicator of anthropogenic changes. A comparison of the man-made changes in Polish flora and vegetation in other countries showed that the changes in Poland are part of the global process of environmental degradation and are aggravated by the country’s economic development.