Продукция бактериопланктона и его роль в питании зоопланктона оз. Севан

Abstract

В данной статье вкратце излагаются результаты определений общей численности, биомассы, времени генерации и продукции бактериопланктона, а также освещается его роль в питании зоопланктона оз. Севан в период понижения уровня воды на 15 м.The author presents the results of a study of the quantitative development of bacteria and their role in the nutrition of Lake Sevan zooplankton during the period of a fall of 15m in the lake surface. It was found that the total number of microorganisms in the water of the open lake areas during the course of the year is 289,000 cells/ml, while the biomass is 0.345 mg/1. Reproduction of bacteria in Sevan water occurs slowly, the time of their generation during the year is 308 hours on the average, the production is 25,000 cells/ml of water per day. It was found that the bacterioplankton of Lake Sevan is a basic food source for planktonic crustaceans. Under condition of 50% assimilation the bacteria satisfy the food requirements of the crustaceans by 41.9%.