Species attributes and invasion success by alien plants on Mediterranean islands

作者：Francisco Lloret, Frédéric Mèdail, Giuseppe Brundu, I. Camarda, Eva Moragues, Juan Rita, Philip W. Lambdon, Philip E. Hulme · 发表于：Journal of Ecology · 年份：2005 · DOI：10.1111/j.1365-2745.2005.00979.x · 被引用次数：315 · 研究领域：Plant and animal studies、Ecology and Vegetation Dynamics Studies、Mediterranean and Iberian flora and fauna

1 Species attributes have been used to explain invasion patterns assuming the prevalence of biological mechanisms, although this approach often suffers several methodological and conceptual limitations, such as local idiosyncrasies, differences among habitats, phylogenetic constraints and insufficient sample size. 2 The relative importance of 15 species traits for explaining the abundance over 350 naturalized alien plant species was assessed across five Mediterranean islands (Corsica, Crete, Majorca, Malta and Sardinia). A comparative analysis accounting for phylogeny was used to examine variation in semi-quantitative estimates of species abundance in comparable habitats across the five island floras. 3 Species were divided into those with affinity for semi-natural, agricultural and ruderal habitats. Both vegetative and reproductive attributes were evaluated for individual islands and averaged across all islands. 4 Vegetative propagation, large leaf size, summer flowering, long flowering period and dispersal by wind or vertebrates were positively associated with average alien abundance across all five islands. Fewer significant trends were found in island-specific patterns. 5 The relative importance of a few reproductive traits is reflected in over-representation of Caryophyllales, Asterales and Poales (late flowering, large seed size and anemochory). Although significant covariation in traits was found there was no evidence for well-defined invasive syndromes. 6 Succulence w...