Naslov
Vertical distribution of morphological forms of Cylindrospermopsis raciborskii in a floodplain lake

Autori
Stević, Filip ; Milić, Ana ; Špoljarić Maronić, Dubravka ; Žuna Pfeiffer, Tanja ; Zahirović, Vanda ; Mihaljević, Melita

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Zbornik sažetaka 12. hrvatskog biološkog kongresa s međunarodnim sudjelovanjem = Book of abstracts of the 12th Croatian biological Congress with international participation / Klobučar, G. ; Kopjar, N. ; Gligora Udovič, M. ; Lukša, Ž. ; Jelić, D. - Zagreb : Hrvatsko biološko društvo, 2015, 242-242

Skup
12. Hrvatski biološki kongres s međunarodnim sudjelovanjem

Mjesto i datum
Sveti Martin na Muri, Hrvatska, 18.09.2015. - 23.09.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
invasive species; primary and secondary filaments; trichomes; akinetes; heterocytes

Sažetak
The cyanobacterium Cylindrospermopsis raciborskii (Woloszynska) Seenaya et Subba Raju is a toxic, invasive, originally tropical to subtropical species, which has spread in many freshwater ecosystems of temperate regions. The aim of this study was to determine the vertical distribution and morphological changes of C. raciborskii in summer of 2011 in Lake Sakadaš (Kopački rit Nature Park). Samples were collected at the surface and at every meter depth to the lake bottom. At the beginning of the development (in August), the presence of only one morphological form (primary filament) of C. raciborskii was recorded (1.21 x 106 ind./L). In September, the massive development of this species was found (27.81 x 106 ind./L). Together with the primary filament, there were six other morphological forms of secondary filament. The morphological forms differentiated according to t he size (length and width) of filament as well as akinete size. Trichomes with one heterocyte were the most represented secondary filaments in the whole water column. Their presence was between 59.01% (in the bottom layer) to 84.85% (in the surface layer) of the total number of C. raciborskii individuals. Continuous monitoring of this invasive species will contribute to spread control and promote water protection measures and biodiversity of Kopački Rit floodplain, as well as other freshwater ecosystems of central and southern Europe.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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