Natural Environment Monitoring 2013, No 14, 97-101
CRUSTACEAN ZOOPLANKTON OF HARMONIOUS LAKES
IN WIGRY NATIONAL PARK AND RELATIONSHIP
WITH THE TROPHIC STATE
Maciej Karpowicz, Andrzej Górniak
Zooplankton is an important level in the trophic chain in freshwater ecosystems and is a good indicator of changes in the lake, and yet it was not considered as a useful index in the Water Framework Directive. The long-term data from Lake Wigry show that the structure of crustacean zooplankton is stable in recent years, despite fluctuations in the chemical composition of water. The zooplankton structure changes only in the situation with a clear long-term trend in the trophic status of lakes. Therefore, zooplankton should be used to assess the ecological status of lakes.