%0 Journal Article
%T Comparaci車n de la flora ex車tica vascular en sistemas de islas continentales: Cerde a (Italia) y Baleares (Espa a)
%A Podda
%A Lina
%A Fraga i Arguimbau
%A Pere
%A Mayoral Garc赤a-Berlanga
%A Olga
%A Mascia
%A Francesco
%J Anales del Jard赤n Bot芍nico de Madrid
%D 2010
%I Consejo Superior de Investigaciones Cient赤ficas
%X This paper provides a comparison of the vascular exotic flora of Sardinia and that of the Balearic Islands, both territories belonging to the Western Mediterranean biogeographic subregion. The study has recorded 531 exotic taxa in Sardinia (18.8% of the total flora) while 360 (19%) in the Balearic Islands; 10 are new to Sardinia (3 of which for Italy) and 29 to the Balearic Islands. The alien flora of Sardinia is included in 99 families; Fabaceae is the richest (49 taxa), followed by Poaceae (33) and Asteraceae (31) while in the Balearic Islands in 90 families, with a predominance of Fabaceae (32), Asteraceae (31) and Poaceae (27). The comparison of the biological spectra reveals that in Sardinia phanerophytes are the most represented in Sardinia and therophytes in the Balearic Islands. A detailed analysis shows that most of the exotic taxa (246) are shared by both territories with a clear dominance of neophytes rather than archaeophytes. A study of the geographical origin shows supremacy of the American element over the Mediterranean. The majority of introduced exotic taxa are a result of intentional human introductions (76% SA, 77% BL), mainly for ornamental use (43% SA, 45% BL). The most occupied habitats are the semi-natural, agricultural and synanthropic for both territories, but attending to invasive plants, coastal habitats in Sardinia and wetlands in the Balearic Islands are the most sensitive. A part of the work deals with the causes of fragility and low resilience of the different habitats. Se presenta un estudio comparativo de la flora vascular ex車tica de Cerde a y de las Baleares, dos sistemas insulares pertenecientes a la subregi車n biogeogr芍fica Mediterr芍nea Occidental. En Cerde a se han contabilizado 531 t芍xones ex車ticos (18,8% del total de su flora), mientras que en las Baleares 360 (19%), siendo 10 citas nuevas para Cerde a (3 de las cuales para Italia) y 29 para Baleares. La flora ex車tica de Cerde a est芍 incluida en 99 familias, y Fabaceae es la m芍s rica (49 t芍xones), seguida por Poaceae (33) y Asteraceae (31), frente a 90 familias para las Baleares, con predominio de Fabaceae (32), Asteraceae (31) y Poaceae (27). Se han encontrado diferencias respecto a los tipos biol車gicos, con un predominio de los faner車fitos en Cerde a y de los ter車fitos en las Baleares. Un an芍lisis detallado muestra que buena parte de estos t芍xones (246) son compartidos por ambos territorios, as赤 como una dominancia de los ne車fitos frente a los arque車fitos. Respecto al origen geogr芍fico, ambos territorios presentan una preeminencia del elemento americano sobre el m
%K alien species
%K biogeography
%K conservation
%K invasions
%K Mediterranean
%K biogeograf赤a
%K conservaci車n
%K especies ex車ticas
%K invasiones
%K Mediterr芍neo
%U http://rjb.revistas.csic.es/index.php/rjb/article/view/350/345