The Biomass of Macrophytes at Several Sites of the Upper Reaches of the Yenisei River

Abstract

The composition and biomass of aquatic plants have been investigated near several settlements at the upper reaches of the Yenisei River: from Krasnoyarsk city to the Angara River mouth. Submerged aquatic plants mainly represented the aquatic flora. The phytomass consisted mostly of plants from the deep-water zone of the river. The mean biomass of plants in the deep-water zone was 410 g/m2 , the impact of Potamogeton species in the deep-water biomass was 64-100 %. P.lucens dominated at the majority of deep-water sites (53-98 % in terms of dry biomass)