The occurrence of European mistletoe under the conditions of high human impact in the central part of Warsaw, Poland

Maria Zachwatowicz, Karolina Petrović, Barbara Sudnik-Wójcikowska

Abstrakt


The distribution of the European mistletoe (Viscum album L. subsp. album) was described for the central part of Warsaw, taking into account the taxonomic composition of its hosts and the spatial distribution of the mistletoe stands determined by the differentiation of biotic and abiotic factors. The mistletoe occurred on 27 host species, belonging to 15 genus and 8 families. The parasite showed a strong preference for alien, planted tree species (Acer saccharinum, Populus xeuramericana and Robinia pseudacacia). The noted mistletoe stands were scattered unevenly among city habitats. The longest host lists belonged to the sites of city transportation complex and courtyards of old housing estates. Mistletoe distribution was influenced indirectly by abiotic factors, which determined life conditions of the infested hosts. To a much higher degree the direct impact of biotic factors, especially a close relation to the number and distribution of breeding and migratory birds – disseminators of mistletoe seeds, was remarkable. It was recognised that Viscum album L. subsp. album adapts well to the most heavily changed and contaminated habitats of a big city, thus can be treated as a synanthropic species.


Słowa kluczowe


European mistletoe, Viscum album L. subsp. album, distribution, city habitats, hemiparasitic plants

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