Acta Botanica Croatica, Vol. 52 No. 1, 1993.
Izvorni znanstveni članak
Syntaxonomdcal Range of Marsilea quadrifolia L. (Marsileaceac) in Posavina, Croatia
Nada Hulina
; Hrvatska
Sažetak
Marsilea quadrifolia is an aquatic and semiaquatic plant species of Mediterranian-Submediterranian to Euroasian-Continental (Oberdorfer 1970) and Euroasian-Continental (Gareke 1972) or Circumpolar (Hejny 1960) distribution. In the subtle system of life forms it is classified as a tenagophyte (Hejny 1960). As hydrophyte Marsilea quadrifolia grows in the mesotrophic to eutrophic waters (Dubina 1981). In Europe it represents a rare species which is included in the Red List floras (Aymonin 1975, L an dolt 1982, Niklfeld and al. 1986, Wraber and Skoberne 1989).
According to literature data (Schlosser and Vukotinović 1986, Koscec 1913, Rossi 1924, Horvatić 1931, 1949, 1954, Udbinac 1959, Trinajstić 1970, Rauš and al. 1980, Hulina 1981, 1986, 1989, 1990, Schneider-Jacoby 1990, Šegulja and Rauš 1993) the species Marsilea quadrifolia was noted in Croatia in a number of localities (Table 2, Fig. 1). Recently, its natural distribution in Croatia has been declining.
Using the method of Braun-Blanquet (1964) in the period between 1981 to 1990 Marsilea quadrifolia was recorded in Posavina. The aim was to establish its syntaxonomical range. The results of the research indicate that Marsilea quadrifolia enters the following associations (Table 1): Potametum pectinati Carstens 55 (the class Potametea R. Tx. et Prsg. 42), Sagittario-Sparganietum emersi Tx. 53 (the class Phragmitetea Tx. et Prsg. 42) and Eleocharietum acicularis W. Koch 26 em. Dierss 75 (the class Littorelletea Br. Bl. et Tx. 43).
In Croatia Marsilea quadrifolia also enters the following classes: Isoeto-Nanojuncetea Br. Bl. et Tx. 43 (Horvatić 1954, Horvat et al. 1974, Rauš et al. 1980) and Alno-Populetea Fk. et Fb. 64 (as. Galio-Salicetum albae Raus 73, Šegulja and Rauš 1993.).
Marsilea quadrifolia in Posavina occupies two kinds of habitats, the natural including anthropo-zoogenic along the Sava River and the man-made habitats, namely the newly dug canals (Turopolje, Crnec polje).
The species Marsilea quadrifolia, which can grow in natural and man-made habitats, owing to variety communities, possesses great vitality and ecological plasticity. This is very important for the preservation and continuance of the species Marsilea quadrifolia.
Ključne riječi
Hrčak ID:
159797
URI
Datum izdavanja:
31.12.1993.
Posjeta: 869 *