Original scientific paper
Invasive flora of the city of Sisak (Croatia)
Monika Pruša
Boris Majić
Toni Nikolić
; Botanički zavod s Botaničkim vrtom, Biološki odsjek, Prirodoslovno-matematički fakultet, Sveučilište u Zagrebu, Marulićev trg 9a, 10000 Zagreb
Abstract
The flora of urban areas attracts more attention in recent times, especially as the most vulnerable to penetration of invasive species. Systematic inventory of invasive flora Croatian urban areas has not been implemented, except as a part of the more comprehensive floristic studies of some cities (eg. Split, Zadar, Šibenik and Knin). So far the flora of the Sisak was not inventoried, nor its invasive component. In this study, invasive flora mapping was carried out by an indirect method, using the MTB 256 mapping units in total area of 1506.4 ha. A total of 40 invasive species from 23 families were detected, all belong to the angiosperms. α - diversity ranges from 6 to 22 species per unit area, and Gleason index is in the range from 0.048 to 1.86. Species from the family Asteraceae are most represented, and the most abundant species are Ambrosia artemisiifolia and Erigeron annuus. All recorded invasive species are neophytes and the therophytes is the most common life form. According to the origin, the most species come from North and South America. Although Pearson correlation of the Gleasonovih diversity indices is not significant, the results of multiple regression gives a different picture, showing correlation with individual independent variables. RDA analysis clearly indicates that the distribution of some invasive species are under the strong influence of environmental variables. Compared with other cities in Croatia, the number of invasive species in city of Sisak is relatively large.
Keywords
Sisak; Croatia; invasive flora; diversity; environment influence
Hrčak ID:
127394
URI
Publication date:
28.8.2013.
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