engleski

Invertebrates in Myriophyllum spicatum L. stands in Lake Sakadaš, Croatia

The invertebrates associated with Myriophyllum spicatum L., were studied during the vegetation period in 2004, at three stations I, II and III, in Lake Sakadaš within Kopački rit floodplain, Croatia. A total of twenty one taxa were recorded, with the dominance of the insect larvae representatives. Family Chironomidae had the greatest abundance and represented 67% of all recorded invertebrates, while as nematodes and oligochaetes were especially abundant at the third station. Significant differences in invertebrate abundances were recorded between months of sampling - July and August as well as July and September. Also, stations I and II showed statisticaly important differences in relation to station III, located near lake's dam. Physicochemical data, including trophic state indices, as well as invertebrate community composition were indicative for eutrophic state of water with tendency to hypertrophy at all stations in Lake Sakadaš.

submerged macrophytes; eutrophication; chironomids; nematodes; oligochaetes

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