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Field research on the ruderal flora of fifteen abandoned villages in Kampinos National Park revealed that among the 550 vascular plant species identified, 13% represent the oldest flora settlers, or archeophytes. The number of archeophytes in particular villages varied from 28 to 46. Only 8 species were present in all of the villages: Armoracia rusticana, Ballota nigra, Capsella bursa-pastoris, Descurainia...
The conservation status of the communities of the class Asplenietea trichomanis was studied in 2010 in southern Poland. In all, 81 sites with rocky plant communities were selected, and 270 phytosociological relevés were collected. Alien species were found at 27% of the sites. This indicates that the rocky communities there are exposed to strong pressure of plant invasion. The most common alien species...
In Poland 30 species of invasive mollusks were found; 11 of aquatic snails, 9 of land snails and 10 of land slugs. The most important in plant production are the following slug species: Arion lusitanicus, A. rufus and A. distinctus. These pests quickly spread throughout the country, create huge populations and often cause significant losses in yielding of vegetables, some agricultural crops (especially...
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