Publications Repository - Gdańsk University of Technology

The factors affecting prokaryotic and virus structure dynamics and bacterial commu-nity composition (BCC) in aquatic habitats along a ca. 1500 m of the Brattegg Valley lake–stream system (SW Spitsbergen) composed of three postglacial lakes created by Brattegg Glacier meltwater were examined. A high number of small-volume prokaryotic cells were found in the recently-formed, deep, upper, subglacial lake. Bacterial taxonomic diversity assessed by PCR-DGGE indicated that the lakes’ BCC differed; with its rich-ness decreasing down the system. Fluorescence in situ hybridisation (FISH) revealed a BCC increase; mainly in α-Proteobacteria, Cytophaga/Flavobacterium and Actinobacteria. We found increasing β-ProteobacteriaandActinobacterianumbersand a decrease in α-Proteobacteriadownthe system. Our results indicate that glacial meltwater sustains an active bacterial community which is then stimulated or partly eliminated by the proglacial lakes’ higher temperature and nutrient input. We conclude that the prokaryotic succession along this lake–stream system occurs through changes in the structure of dominant bacte-rial communities, their replacement and elimination. Bacterial community succession in an Arctic lake–stream system (Brattegg Valley, SW Spitsbergen). Available from: https://www.researchgate.net/publication/289512657_Bacterial_community_succession_in_an_Arctic_lake-stream_system_Brattegg_Valley_SW_Spitsbergen

Authors

• Dorota Górniak,
• dr hab. Henryk Marszałek,
• dr hab. Katarzyna Jankowska link open in new tab ,
• dr hab. Dunalska Julita