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Phytoplankton research in Kurdzhali Reservoir

Detelina Belkinova, Rumen Mladenov, Ivanka Dimitrova‐Dyulgerova, Svetoslav Cheshmedjiev, Iliana Angelova

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Abstract

Dedicated to Assoc. Prof. Dr Stefan Draganov in honour of his 75th anniversary Abstract. The species structure and quantitative development of the summer phytoplankton in Kurdzhali Reservoir have been studied. A total of 55 species was found, belonging to 6 divisions: Cyanoprokaryota – 13, Chlorophyta – 23, Zygnemaphyta – 5, Dinophyta – 2, Euglenophyta – 3, and Bacillariophyta – 9 species. The divisions Chlorophyta (41.8 %), Cyanoprokaryota (23.6 %) and Bacillariophyta (16.4 %) have shown the highest relative abundance. In the ecotone zone of river Arda – Kurdzhali Reservoir the species diversity and quantitative development of the phytoplankton are higher than in the Reservoir proper. The average phytoplankton biomass corresponds to levels characteristic for the boundary between oligo- and mesotrophic types of water basins.

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What this paper is about

Dedicated to Assoc. Prof. Dr Stefan Draganov in honour of his 75th anniversary Abstract. The species structure and quantitative development of the summer phytoplankton in Kurdzhali Reservoir have been studied. A total of 55 species was found, belonging to 6 divisions: Cyanoprokaryota – 13, Chlorophyta – 23, Zygnemaphyta – 5, Dinophyta – 2, Euglenophyta – 3, and Bacillariophyta – 9 species. The divisions Chlorophyta (41.8 %), Cyanoprokaryota (23.6 %) and Bacillariophyta (16.4 %) have shown the highest relative abundance. In the ecotone zone of river Arda – Kurdzhali Reservoir the species diversity and quantitative development of the phytoplankton are higher than in the Reservoir proper. The average phytoplankton biomass corresponds to levels characteristic for the boundary between oligo- and mesotrophic types of water basins.

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Available abstract

Dedicated to Assoc. Prof. Dr Stefan Draganov in honour of his 75th anniversary Abstract. The species structure and quantitative development of the summer phytoplankton in Kurdzhali Reservoir have been studied. A total of 55 species was found, belonging to 6 divisions: Cyanoprokaryota – 13, Chlorophyta – 23, Zygnemaphyta – 5, Dinophyta – 2, Euglenophyta – 3, and Bacillariophyta – 9 species. The divisions Chlorophyta (41.8 %), Cyanoprokaryota (23.6 %) and Bacillariophyta (16.4 %) have shown the highest relative abundance. In the ecotone zone of river Arda – Kurdzhali Reservoir the species diversity and quantitative development of the phytoplankton are higher than in the Reservoir proper. The average phytoplankton biomass corresponds to levels characteristic for the boundary between oligo- and mesotrophic types of water basins.

Key concepts: Phytoplankton, Chlorophyta, Biomass (ecology), Ecotone, Abundance (ecology), Environmental science, Ecology, Oceanography

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