USE OF TROPHIC STATE INDEX (CARLSON, 1977) FOR ASSESSMENT OF TROPHIC STATUS OF THE SHKODRA LAKE

摘要

The Shkodra lake is the biggest in the Balkans and is one of the most important lakes in Albania. Its lies in Albania and Montenegro border and has been the object of study for a lot of researchers that imply the different field of study. Eutrophication is becoming main problem of the deterioration of the quality of natural waters. This problem although a natural process that happens over time is often accelerated by human activity in natural waters banks named cultural eutrophication. There are some methods to assess the condition of the trophic status of a lake, one of which is used for the Shkodra lake and is shown in this article. In this study is shown how to use the trophic states index (TSI) (Carlson 1977) to assess the trophic condition for the Shkodra lake. Results of analyses showed that open waters retain their status throughout the year as oligotrophic waters but the coast and especially the south-east coast waters of the lake represent a greater value of TSI which grows during the summer which is thought to be linked to seasonal developments of the lake and the increased human activity near the lake.