Structure and dynamics of phytoplankton during the wintere period (Nature Park Kopački rit)

Fitoplankton je jedan od pet bioloških elemenata kakvoće vode za praćenje općeg ekološkog stanja voda. Istraživanja fitoplanktona na području Kopačkog rita su do sada uglavnom bila provođena u vrijeme trajanja vegetacijske sezone, dok je zimsko razdoblje nedovoljno istraženo iako može imati značajan utjecaj na razvoj zajednica kasnijih razdoblja. Cilj ovog istraživanja je bio utvrditi strukturu i dinamiku fitoplanktona u Sakadaškom jezeru i kanalu Čonakut tijekom zimskog razdoblja prilikom kojeg su uzorci prikupljeni u tjednim intervalima od siječnja do ožujka 2020. godine. Tijekom istraživanja utvrđeno je 13 dominantnih vrsta, a najviše pronađenih vrsta je pripadalo skupini Bacillariophyta. Utvrđena je manja brojnost i manja biomasa u odnosu na zajednicu koja se razvija za vrijeme vegetacijske sezone. Također, rezultati potvrđuju značajan utjecaj poplava na strukturu zajednicePhytoplankton is one of the five biological elements of water quality for monitoring the ecological state of waters. Phytoplankton research in the area of Kopački rit has so far been mostly conducted during the vegatational season, while the winter period has been insufficiently researched, although it can have a significant impact on the development of communities in later periods. The aim of this research was to determine the structure and dynamics of phytoplankton in the Lake Sakadaš and Čonakut Channel during the winter period where the samples were collected at weekly intervals from January to March of 2020. During this study, 13 dominant species were determinated and most of the found species belong to the group Bacillariophyta. Comparing abundance and biomass of winter community with community that develops during the vegatitional season, lower values were established. Results also indicate on significant impact of floods on the structure of community