Recursos Naturales >
Estación Biológica de Doñana (EBD) >
(EBD) Artículos >
Open Access item Cortaderia selloana invasion across a Mediterranean coastal strip
|Keywords:||Alien plant, disturbance, Plant functional-group, Ruderal habitat, Seedling recruitment|
|Citation:||Acta oecolo gica 32 (2007) 255–261|
|Abstract:||The invasive success of Cortaderia selloana, an alien perennial grass introduced from South America, was assessed by comparing plant and population performance in ruderal and non-ruderal habitats across a Mediterranean coastal strip. The main habitat differentiation criterion was the absence or presence of visible signs of recent disturbances. Plant func- tional group richness (i.e. number of plant groups classified as grasses, herbs, shrubs, vines and trees), total plant cover and percentage of bare ground was calculated in each habitat. In addition, soil samples were randomly taken in order to analyse total soil C, total N, CaCO3, pH and soil texture. Cortaderia selloana populations were characterized by calculat- ing total density, proportion of juvenile plants, plant volume, number of panicles and re- productive effort (i.e. number of panicles/plant volume) and fecundity per unit area (number of panicles per ha).
We compared whether population characteristics and plant performance were associated with biotic and abiotic habitat factors. We expected a better performance of C. selloana in ruderal habitats than in non-ruderal habitats. As expected, ruderal habitats had larger and denser C. selloana populations and recruitment was very high (the proportion of juve- nile plants was more than 50%). In consequence, in ruderal habitats, on average, plants were smaller, produced fewer panicles, and had a lower reproductive effort. The high per- centage of bare ground, low pH and low functional group richness were the best explana- tory variables associated to C. selloana invasion success|
|Publisher version (URL):||http://dx.doi.org/10.1016/j.actao.2007.05.006|
|Appears in Collections:||(EBD) Artículos|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.