Биогенный состав взвешенного вещества в водоемах разного трофического типа

The article is concerned to the establishment of relationships between the nutrients characteristics of suspended organic matter in water and the ecosystem trophic status. The investigations were conducted on lakes Naroch, Myastro, Batorino and Bolshiye Shvak- shty, which differ in their trophic level. It was estimated that such parameters as nutrients concentration, the percentage of suspended nutrients in the total elements contain are increased with higher trophy level of waterbody while the relative contain of nutrients in seston is decreased. The C:N:P ratio doesn’t show exact relations with trophic status of the ecosystem and is at the same level in all investigated lakes. The comparison of the data obtained with the literature one’s related to 1978–1981 has confirmed these patterns of relationships