Algological and bacteriological investigations on reed periphyton in Lake Velencei, Hungary

Ács, Éva and Kériné Borsodi, Andrea and Makk, Judit and Molnár, Piroska and Mózes, Andrea and Rusznyák, Anna and Reskóné, Mária N. and Kiss, Keve Tihamér (2003) Algological and bacteriological investigations on reed periphyton in Lake Velencei, Hungary. HYDROBIOLOGIA, 506-50 (1-3). pp. 549-557. ISSN 0018-8158 (print), 1573-5117 (online)

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In the shallow Lake Velencei (surface area 24.5 km(2)) reed communities (Scirpo-Phragmitetum) are of great significance due to extensive metabolic activity of algal-bacterial associations developing on their submerged surfaces. Samples for algological and bacteriological studies were taken in April 2000 and July 2001 at five sites of the lake and were analysed with traditional methods as well as with tools of molecular biology (16S rDNA sequencing). These investigations have shown that (i) The original mosaic structure of the lake disappeared; periphytic algae became spatially uniform both in terms of taxonomic composition and abundance. (ii) The biodiversity of the reed periphyton decreased. The dominance of the weed algal species Achnanthes minutissima Kutz. increased significantly. (iii) The most frequent bacteria were members of the genera Pseudomonas, Acinetobacter, Shewanella and Agrobacterium characterised by oxidative chemoorganotrophic heterotrophic- and Aeromonas and Bacillus species with fermentative metabolism. (iv) Among the studied bacterial strains both plant growth promoting bacteria, members of Pseudomonas fluorescens group, and potential plant pathogens (Agrobacterium, Aureobacterium, Curtobacterium) were present.

Item Type: Article
Subjects: Q Science / természettudomány > QE Geology / földtudományok > QE08 Hydrosphere. Hydrology / hidroszféra, hidrológia
Q Science / természettudomány > QH Natural history / természetrajz > QH301 Biology / biológia
Depositing User: Erika Bilicsi
Date Deposited: 20 Feb 2013 14:27
Last Modified: 20 Feb 2013 14:27

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