Major Bloom Producing Phytoplankton Species in the Lakes along the Bulgarian Black Sea Coast

D. PETROVA
Institute of Fishing Resources, BG-9000 Varna, Bulgaria

Abstract

PETROVA, D., 2008. Major bloom producing phytoplankton species in the lakes along the Bulgarian Black Sea Coast. Bulg. J. Agric. Sci.; 14: 201-208

Archive data analysis shows that during the different periods of anthropogenic impact phytoplankton production reaches pathologically high levels. Thus, phytoplankton is assumed as an indicator of marine water quality and ecological health. Its long-term excess in the Black Sea suggests the steps forward for better understanding and management of the existing process.
Phytoplankton surplus production exhausts the ecosystem and leads to blooms with respective consequences: changes in water color (red, brown), bad smell, sliming of the body, indigestion after consumption of sea foods.
Blooms may last from 10 to 20 days which is disastrous for the bottom coenoses and tourist business.
The article presents the main phytoplankton species dynamics during the period 1991-2003 which has led to the above mentioned conditions.

Key words: Black Sea, phytoplankton, blooms

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