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Montjuïc Mountain (Barcelona): A hotspot for plant invasions in a Mediterranean city

AuthorsFarelo, Paula; Gómez-Bellver, Carlos; Montserrat, Josep M. ; Pyke, Samuel; López-Pujol, Jordi ; Ibáñez Cortina, Neus
Issue Date2-Oct-2019
CitationXVI Optima Meeting (2019)
AbstractThe Mediterranean Basin is one of the areas with the highest concentration of alien species in the world, because of its relatively mild climate, the highly modified landscapes and the rich habitat diversity. We have chosen Barcelona, the large Mediterranean city, as a case study to illustrate how urban areas can become major pathways for the introduction and establishment of alien plants, most of which coming from gardening practices. Specifically, we have selected Montjuïc, an urban hill of ca. 3.6 km2, located in the sea front. We hypothesized that Montjuïc hill would be a hotspot for plant invasions, given by a series of considerations: (1) it is a deeply transformed area, with land-use changes; the hill was the main quarry of the region from the Iberian and Roman periods until the middle of the 20th century, (2) the occurrence of several artificial ¿gates¿ to alien plants, such as the seaport, the expressway, and others, (3) the Barcelona Botanical Garden (partially built on a rubbish dump) as well as a large part of Barcelona¿s urban parks, are situated within Montjuïc hill. We present herein the results of a project aimed to obtain a comprehensive catalogue of the hills¿s alien flora. An extensive fieldwork in the study area has been carried out over four years, combined with database/literature search, to identify all alien plant species, both casual and naturalized. A total of ca. 270 alien taxa have been identified for Montjuïc hill, which is almost the half of reported for Catalonia, and almost one third of that for the whole Spain, hereby confirming the role of this area as a local hotspot for alien plants. Although most of the alien flora of the Montjuïc hill is shared with these areas, there are several floristic novelties at both a local and regional level.
DescriptionTrabajo presentado en el XVI Optima Meeting (Organization for the Phyto-Taxonomic Investigation of the Mediterranean Area), celebrado en Atenas (Grecia), del 2 al 5 de octubre de 2019
Appears in Collections:(IBB) Comunicaciones congresos
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