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Haloleptolyngbya alcalis gen. et sp. nov., a new filamentous cyanobacterium from the soda lake Nakuru, Kenya

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Abstract

The food web of the saline-alkaline Lake Nakuru is dominated by the cyanobacterium Arthrospira fusiformis as the primary producer and a huge population of Lesser Flamingos as direct consumers. However, the dense blooms of Arthrospira are not stable, and collapse irregularly and unpredictably. During such periods they are replaced by other algae or cyanobacteria. The wide fluctuation in the cyanobacterial and algal populations of Lake Nakuru has a great influence on food availability for Lesser Flamingos, and is therefore of high ecological importance. To support the descriptive work on these phenomena, we describe here a new cyanobacterial taxon from this soda lake: Haloleptolyngbya alcalis Dadheech, Mahmoud, Kotut et Krienitz gen. et sp. nov. The study was based on multilocus molecular analyses of 16S rRNA gene, 16S-23S internal transcribed spacer, partial sequences of beta and alpha subunits including intergenic spacer (cpcBA-IGS) of phycocyanin operon, phenotypic features using light microscopy, scanning electron microscopy, transmission electron microscopy, and ecology. The new taxon established a separate lineage within the family of Peudanabaenaceae (Oscillatoriales).

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Acknowledgments

We thank the Government of Kenya for giving permission to carry out this research (No. MOEST 13/001/31 C 90), and the Kenya Wildlife Service for granting us access to Lake Nakuru. The authors extend their thanks to Ms. Ahlam Al-Kadi and Mr. Javed K. Surti from the Nanoscope Science Center, Kuwait University for their help with the scanning and transmission microscopy. We are thankful to Monika Degebrodt for her technical assistance with sequencing and Monika Papke for laboratory assistance.

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Authors and Affiliations

  1. Department of Botany, Government College, Ajmer, 305001, Rajasthan, India

    Pawan K. Dadheech

  2. Department of Biological Sciences, Kuwait University, P.O. Box 5969, Safat, 13060, Kuwait

    Huda Mahmoud

  3. Department of Plant and Microbial Sciences, Kenyatta University Nairobi, P.O. Box 43844, Nairobi, GPO 00100, Kenya

    Kiplagat Kotut

  4. Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Alte Fischerhütte 2, 16775, Stechlin, Germany

    Pawan K. Dadheech & Lothar Krienitz

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  1. Pawan K. Dadheech
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  2. Huda Mahmoud
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  3. Kiplagat Kotut
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  4. Lothar Krienitz
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Correspondence to Pawan K. Dadheech.

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Dadheech, P.K., Mahmoud, H., Kotut, K. et al. Haloleptolyngbya alcalis gen. et sp. nov., a new filamentous cyanobacterium from the soda lake Nakuru, Kenya. Hydrobiologia 691, 269–283 (2012). https://doi.org/10.1007/s10750-012-1080-6

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