Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1007/s10530-021-02509-4
Lizenz creative commons licence
Titel (primär) Functional diversity changes in native and alien urban flora over three centuries
Autor Milanović, M.; Kühn, I. ORCID logo ; Pyšek, P.; Knapp, S.
Journal / Serie Biological Invasions
Erscheinungsjahr 2021
Department BZF; iDiv
Band/Volume 23
Heft 7
Seite von 2337
Seite bis 2353
Sprache englisch
Topic T5 Future Landscapes
Keywords Archaeophytes; Functional diversity; Functional traits; Invasive species; Neophytes; Time series; Urbanization
UFZ Querschnittsthemen ESCALATE;
Abstract Alien species in urban areas have a large effect on overall species diversity. A suitable metric of flora’s response to environmental change is functional diversity (FD) that refers to the multivariate space of species’ trait compositions, reflecting their ecological niches. We studied how FD changed over 320 years of urbanization in the city of Halle (Saale), Germany. Selected functional traits (related to stress-tolerance, reproduction, competitiveness and phenology) were examined for the difference in FD between native and alien plant species, the latter specifically for archaeophytes, neophytes and invasive species. Functional diversity for each trait was calculated using Rao’s Q index followed by a linear model to test for changes in Rao’s Q over time between the groups. Over the 320 years, overall FD remained constant despite species turnover, but FD significantly increased for neophytes and invasive species compared to native species. Plant height was the only trait showing increase in FD as main effect, while for the other traits examined FD decreased over time. Considering invasive species separately, the majority of traits exhibit a significant increase in FD except for seed mass where it decreased. Finally, FD of multiple functional traits combined decreased over time. This can be due to homogenization of functional trait between native and alien species, as a consequence of habitats becoming more similar and subsequent habitat filtering. Our results demonstrate that during the last three centuries, urbanization influenced plant FD in various ways and may contribute to future uniformity of urban floras and greater invasiveness.
dauerhafte UFZ-Verlinkung
Milanović, M., Kühn, I., Pyšek, P., Knapp, S. (2021):
Functional diversity changes in native and alien urban flora over three centuries
Biol. Invasions 23 (7), 2337 - 2353