Informace o publikaci
Intercontinental comparison of habitat levels of invasion between North America and Europe
| Autoři | |
|---|---|
| Rok publikování | 2014 |
| Druh | Další prezentace na konferencích |
| Citace | |
| Popis | In recent decades several studies on quantitative comparisons of alien species occurrences in different habitats have revealed that habitats differ in their levels of invasion. However, it is still unclear if the invasion patterns observed at regional scale are valid also at larger scales. This study provides the intercontinental comparison of habitat levels of invasion between temperate parts of North America and Europe. Native and alien vascular plant species were identified within 4165 vegetation plots randomly selected from two comprehensive vegetation-plot databases. For 12 corresponding habitats, the levels of invasion were calculated as the proportion of alien species in vegetation plots assigned to a habitat. A positive relationship was found between habitat levels of invasion between the continents (R2= 0.908; P< 0.001). On both continents, the most invaded habitats were alluvial forests, riverine fringes and freshwater marshes, whereas the least invaded habitats were mires, waterlogged and mesic coniferous woodlands. Consistent pattern of habitat levels of invasion indicates similar mechanisms influencing the invasion in habitats despite differences in biogeographical and socioeconomic features between the regions. Habitats with high levels of invasion have high resource availability, frequent disturbances, strong human impact and large alien species pool. In contrast, habitats in sparsely populated areas with low nutrient availability, disturbance and limited pool of alien species show low proportions of aliens. At the same time, higher proportions of alien species provided by European habitats to North America than vice versa are reflected in generally higher level of invasion across North American habitats. |