Published in Scientific Papers. Series B, Horticulture, Vol. LXVIV, Issue 1
Written by Maria RAICU, Mihaela URZICEANU, Petronela CAMEN-COMĂNESCU, Florin TOMA
Ornamental horticulture is one of the most significant pathways for the introduction of alien plant species globally. Many ornamental species, initially cultivated in gardens, have demonstrated invasive potential and begin their spread in riparian habitats. While a majority of these introduced plants have not yet become naturalized in local ecosystems, some species exhibit significant invasive potential under favorable environmental conditions or climate change. This study examines the occurrence and stability of alien ornamental plant populations along the riverbank zones of urban and peri-urban waterways in Bucharest, focusing on the Argeș River, Dâmbovița River, and Colentina lake chain. The results highlight the presence of species with varying degrees of invasiveness in Romania, including, Ailanthus altissima, Alcea rosea, Hemerocallis fulva, Humulus scandens, Ipomoea purpurea, Reynoutria japonica and Solidago canadensis. These species have established stable populations influencing local biodiversity. The analysis brings into focus key aspects such as introduction pathways, invasion status, spread mechanisms, distribution across the three rivers, and relative abundance, offering valuable insights into the dynamics of alien plant invasions within urban and peri-urban riverbanks.
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