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Mycological studies covered two species of Charadriiformes birds: Dunlin - Calidris alpina (41 individuals) and Ringed plover - Charadrius hiaticula (8 individuals). Swabs were collected from their beaks cavity and cloacae. Fungi (38 strains) were isolated from 29 birds (59.18% of the investigated). The most abundant were the yeast-like fungi (Candida, Cryptococcus, Rhodotorula), substantially dominated...
Seasonal changes of water level, aquatic chemistry and phytoplankton composition of the Daugava’s floodplain lake Grīvas was studied in 1999. Significant influence of the Daugava’s floods on the lake’s water level was found. Filling, drainage and isolation phases in hydrological regime of the lake were distinguished. The Daugava’s floodwater influx in April caused considerable water level rising and...
The removal of the nutrients: different forms of nitrogen, phosphorus and carbon, by two constructed wetland systems with reed (Phragmites australis) was investigated between the spring 2000 and the summer 2001. Two systems: reed pond with surface flow and sand reed bed with subsurface flow, have been compared Both the systems show high performance wastewater purification during whole vegetation season...
Archived specimens of Dreissena, collected as part of a long-term biomonitoring effort in the lower Don and Volga River systems and dating back to 1979, were re-examined. Originally identified as Dreissena polymorpha or variants thereof, some of the specimens were identified to be Dreissena bugensis. Based on this new evidence, the invasion history of D. bugensis in these two river systems was re-evaluated...
The Paraguay-Paraná river system forms an important ecological corridor across South America. Here, we report the first description of the fluvial geomorphology and the physical structure of aquatic habitats along the main channel a 200-km long section of the Upper Paraguay River between Cáceres city and Taiamã island (Mato Grosso, Brazil). Four functional sets were identified: (a) main channel and...
To assess the current ecosystem status of Montedoglio Reservoir and surrounding waters, the fish fauna has been analysed in 1993, about five years after the first experimental impoundment. Total number of 898 fishes of fifteen species have been collected of the total biomass of 117 kg. The most abundant species were pumpkinseed (Lepomis gibbosus), goldfish (Carassius auratus L.), bleak (Alburnus alburnus...
The goal of the study was to compare enzymatic activities of Candida albicans, Candida guilliermondii and Rhodotorula glutinis collected from different aquatic ecosystems of Olsztyn. The highest enzymatic activity was observed in isolates obtained from astatic reservoirs (isolates of Candida albicans and Rhodotorula glutinis produced the complete set of 19 hydrolases tested). A slightly lower enzymatic...
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