Features of reproductive capacity of the alien moss Campylopus introflexus in anthropogenic areas (dumps of coal mines, underground sulfur smelting and former peat quarry) of Lviv Region were investigated. In 10 studied localities the following parameters of the moss development have been analyzed: number and ratio of male, female plants and those without gametangia; productivity of fertile plants; in addition, the forming activity of specialized asexual propagulas and sporogonia has been also assessed. The high potential of the moss for generative and vegetative regeneration, significant variability of phenotypical sex ratio of bisexual moss turfs, mostly prevailed by females, were observed. Male plants have more opportunities to spread by brood or shoot tips breaking off and to colonize new areas, producing a large number of unisexual moss turfs and different sex ratio of mature fertile individuals. The higher productivity of male plants was found in more humid localities, while open sunny habitats are favourable for female individuals. It was established that stress conditions in the devastated areas of mining enterprises significantly affect the development of sporophyte and vitality of C. introflexus spores. In the moss capsules from the localities of coal dumps, there were up to 85% of abortive spores. The active forming of specialized brood organs, namely the breaking off shoot tips during autumn and spring periods and reproduction by fragments of shoots and turfs, have been observed in all localities.

Keywords: Campylopus introflexus, alien moss species, fertile specimens, brood propagules

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