Invasive Neophyten an Fliessgewässern
Krüsi, B.O. (2014). Invasive Neophyten an Fliessgewässern: Einfluss von Bodeneigenschaften und Zeit seit Abschluss der Revitalisierung. Naturschutz und Landschaftsplanung, 46, 9. 273-282. Peer reviewed.;
The study investigated the influence of soil properties and of
time after completion of the revitalization on revitalized and
non-revitalized sections of 16 rivers in Switzerland with regard
to the presence of invasive neophytes. On nutritious topsoil
neophytes covered on average 5.9 % of the areas examined,
and on raw soil they covered 1.3 % (n = 1214 sub-transects).
In recently revitalized river sections the average number of
invasive neophyte species and the proportion of colonized plots
were greater than in areas which had been revitalized six or
more years before or along non-revitalized sections. The 16
studied rivers differed greatly regarding the occurrence and
abundance of the neophyte species. Half of the stands of the
in total most commonly found late blooming goldenrod (Solidago
gigantea) were located along the rivers Thur and the Töss
in the canton of Zurich.
Results of the study showed that disturbances caused by
revitalization together with nutritious soils particularly favour
neophytes. Additionally clear differences between the 16 rivers
indicate that the occurrence of invasive neophytes most likely
also depends on existing populations in the neighbourhood.