Natura Croatica, Vol. 20 No. 2, 2011.
Izvorni znanstveni članak
Net-phytoplankton species dominance in a travertine riverine Lake Visovac, NP Krka
Marija Gligora Udovič
; University of Zagreb, Faculty of Science, Division of Biology, Rooseveltov trg 6, HR-10000 Zagreb, Croatia
Koraljka Kralj Borojević
; University of Zagreb, Faculty of Science, Division of Biology, Rooseveltov trg 6, HR-10000 Zagreb, Croatia
Petar Žutinić
; University of Zagreb, Faculty of Science, Division of Biology, Rooseveltov trg 6, HR-10000 Zagreb, Croatia
Laszlo Šipoš
; University of Zagreb, Faculty of Chemical engineering and Technology, Department of General and Inorganic Chemistry, Marulićev trg 19. HR-10000 Zagreb, Croatia
Anđelka Plenković-Moraj
; University of Zagreb, Faculty of Science, Division of Biology, Rooseveltov trg 6, HR-10000 Zagreb, Croatia
Sažetak
Species composition of the net-phytoplankton assemblage and seasonality of the dominant species were investigated in the travertine monomictic stratified riverine Lake Visovac in relation to the environmental variables. The one year investigation was based on monthly sampling from April 1995 to March 1996 at the two deepest vertical profiles, with a maximum depth of 25 m. Diatoms, especially Asterionella formosa Hass. dominated net-phytoplankton assemblages except in late summer and autumn when dinoflagellate species Ceratium hirundinella (O. F. Müller) Bergh became the dominate form. The effects of the short term dynamics of environmental factors on the algal growth in the barrage lenitic area of the calcareous river stressed several variables as important factors controlling annual net-phytoplankton distribution. Temperature was the variable that most affected species abundance, changes in dominance and species composition (Primer 5, BIO-ENV; http://www.primer-e.com/). CCA analysis performed on abundance dataset and environmental variables confirm the importance of temperature but also highlighted total phosphorus, conductivity and silica.
Ključne riječi
phytoplankton assemblages; Asterionella formosa; Ceratium hirundinella; Lake Visovac
Hrčak ID:
75141
URI
Datum izdavanja:
31.12.2011.
Posjeta: 2.252 *