D. KLISAROVA and D. GERDZHIKOV
Institute of Fish Resources, BG – 9000 Varna, Bulgaria
KLISAROVA, D. and D. GERDZHIKOV, 2015. Eutrophication of Varna Bay and coastal waters. Bulg. J. Agric. Sci., Supplement 1, 21: 86–89
The aim of the article is a study of the current state and growth of phytoplankton in the Bulgarian coastal waters and in the so-called „hot spots“ (Varna Bay) (2008–2010). The established average phytoplankton biomass in the coastal waters was 1.20 g/m3. Declining trend of average annual biomass and numbers from 2008 to 2010 was registered. Spring and autumn peaks typical for the post-eutrophication period were observed during the study.