SUMMARY
Kozara National Park is exposed to different anthropogenic influences even though is a part of II IUCN category. In this study, we investigated, identified and mapped invasive plant flora and their impact on the autochthonic plant communities. The fieldwork was conducted using the Braun-Blanquet method during summer months on 6 different locations inside parks. The presence of a total of 13 invasive plant species has been detected. Most of the invasive plants were members of the Asteraceae family, originated from North America (76.92%), therophytes and geophytes, and found in Artemisietalia communities. Conclusively, the invasive plant species are widespread in the examined area, particularly in the parts of parks with tourist recreational sites.Nacionalni Park Kozara je izložen brojim antropogenim pritiscima iako spada u II kategoriju IUCN. U ovoj studiji, istražena je, identificirana i mapirana invazivna flora i njen utjecaj na autohtone biljne zajednice. Tokom ljetnih mjeseci, terenski rad je izvršen na šest razlicitih lokaliteta unutar parka korištenjem Braun-Blanquet metode. Ukupno 13 invazivnih biljnih vrsta je detektovano, od cega najveci broj pripada porodici Asteraceae, porijeklom iz Sjeverne Amerike (76.92%). životni formi terofite i geofite pronadene u zajednici Artemisietalia. Invazivne biljne vrste su veoma rasprostranjene u istraživanom podrucju, narocito u djelovima parka predvidena za odmor i rekreaciju turista.Kljucne rijeci: Nacionalni Park Kozara, invazivna flora, antropogeni pritisak