Scientific publications

River Suna is one of the most important tributaries of Lake Onego. That is why the assessment of ecological state of River Suna is very actually. There is no essential anthropogenious influence in the middle part of the river since it flows here across the territory of the reserve “Kivach”. In the dawn stream the river is under influence of farm wasters.
In 2006–2008 the investigation of macrophyte communities on two parts of the river was carried out. It was fount that macrophyte flora includes 141 species of vascular plant, which relate to 102 genus, 40 families from 5 classes. The comparison of macrophyte communities on two parts of River Suna – in the middle stream (on the territory of the reserve “Kivach”) and near the mouth (dawn stream) – was carried out. There was sufficient distinguish between species composition of investigated macrophyte communities (coefficient of floristic similarity by Jaccard was 0.30) as a consequence of natural factors influence (relief, hydrological regime, the peculiarities of ground).
The distribution of species (indicators of trophic level) was studied on the different parts of the river. It was observed only initial signs of eutrophication in the middle stream (on the territory of the reserve “Kivach”) according to the species composition. In the mouth of the river the eutrophication processes were more obvious due to influence of farm, which is situated near the mouth. The date obtained may be used as basis for allocation of eutrophication zones on the different parts of River Suna and in the ecological monitoring.