engleski

Seasonal Distribution and Morphological Changes of Ceratium hirundinella in Two Mediterranean Shallow Lakes

Seasonal distribution and morphological changes in two forms of Ceratium hirundinella in the shallow karstic Mediterranean lakes, Ponikve and Njivice, during 1997/98 and 2000/01, were studied. C. hirundinella f. gracile was present during the whole investigation period in Lake Njivice. The same species was the dominant form in Ponikve Lake during 1997/98, while in 2000/01 a strong development of C. hirundinella f. austriacum occurred. The species C. hirundinella f. austriacum was restricted to spring-summer time. This population showed larger variations in number of horns. An analysis of morphometric measurements showed significant differences (p<0.01) in the total length of cells, length of fourth horn and V3 angle of the two Ceratium forms.

Ceratium formtype; size variation; morphological changes; seasonal distribution

nije evidentirano