title: Invasion of Opuntia humifusa and O. phaeacantha (Cactaceae) into plant communities of the Karadag Nature Reserve
abstract: The results of a study of Opuntia humifusa and O. phaeacantha naturalised in the Karadag Nature Reserve (southeastern part of the Crimean Peninsula) are presented. There, the largest coenopopulations of Opuntia plants are confined to the biostation territory (bordering with the park, administrative buildings and housing estate). Twelve localities were described in the Karadag Reserve. These differ by phytocoenotic characteristics, area and floristic composition. Seven localities include only O. 
journal: Nature Conservation Research