In this work the occurrence of non-native species was recorded along the elevation gradient in the Alps, in order to establish their distribution pattern, their current altitudinal limits and to elucidate which species are presumably adapted to higher elevations. Plots were located along the course of rivers in five valleys from 100 to 2100 m a.s.l. Sixty-eight non-natives were recorded in the study area. The proportion of invasives was found to be much higher in the study area then in the whole administrative region. The number of non-natives per plot decreased strongly with increasing elevation. The great majority (94%) of the non-native species grows at the lowest elevations, while only 6% survive up to 1500 m and none was found above this limit. Results were interpreted considering the factors driving the invasion process (disturbance, the native communities’ resistance to invasion, propagule pressure, climatic conditions) and plant traits with particular respect to preadaptation to the harsh climate, which increases progressively with elevation. Results confirm that the Alps are not immune from invasion, at least up to medium elevation.

Non-native species distribution along the elevation gradient in the western Italian Alps

SINISCALCO, Maria Consolata;BARNI, Elena;
2011

Abstract

In this work the occurrence of non-native species was recorded along the elevation gradient in the Alps, in order to establish their distribution pattern, their current altitudinal limits and to elucidate which species are presumably adapted to higher elevations. Plots were located along the course of rivers in five valleys from 100 to 2100 m a.s.l. Sixty-eight non-natives were recorded in the study area. The proportion of invasives was found to be much higher in the study area then in the whole administrative region. The number of non-natives per plot decreased strongly with increasing elevation. The great majority (94%) of the non-native species grows at the lowest elevations, while only 6% survive up to 1500 m and none was found above this limit. Results were interpreted considering the factors driving the invasion process (disturbance, the native communities’ resistance to invasion, propagule pressure, climatic conditions) and plant traits with particular respect to preadaptation to the harsh climate, which increases progressively with elevation. Results confirm that the Alps are not immune from invasion, at least up to medium elevation.
145(1)
150
158
http://dx.doi.org/10.1080/11263504.2010.540786
Alps, elevation gradient, non-native species, plant invasion, rivers
C. Siniscalco; E. Barni; G. Bacaro
File in questo prodotto:
File Dimensione Formato  
414534_Non-native species distribution in the western Italian Alps.pdf

Accesso aperto

Tipo di file: POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione 775.91 kB
Formato Adobe PDF
775.91 kB Adobe PDF Visualizza/Apri
Esotiche PLBIO 2011.pdf

Accesso riservato

Tipo di file: PDF EDITORIALE
Dimensione 796.49 kB
Formato Adobe PDF
796.49 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/62048
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 31
  • ???jsp.display-item.citation.isi??? 29
social impact