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Open AccessFeature PaperArticle

Succession of Microbial Community in a Small Water Body within the Alluvial Aquifer of a Large River

1
Department of Biology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, HR-10000 Zagreb, Croatia
2
Department of Hydrogeology and Engineering Geology, Croatian Geological Survey, Sachsova 2, HR-10000 Zagreb, Croatia
3
Ruđer Bošković Institute, Bijenička cesta 54, HR-10000 Zagreb, Croatia
4
Center of Excellence for Science and Technology-Integrating Mediterranean Region (STIM), HR-21000 Split, Croatia
5
Evolutionary Genetics Laboratory (eGL), Agricultural Faculty, Ankara University, Ankara TR-06135, Turkey
6
Department of Soil Amelioration, Faculty of Agriculture, University of Zagreb, HR-10000 Zagreb, Croatia
*
Author to whom correspondence should be addressed.
Water 2021, 13(2), 115; https://doi.org/10.3390/w13020115
Received: 25 November 2020 / Revised: 29 December 2020 / Accepted: 30 December 2020 / Published: 6 January 2021
(This article belongs to the Special Issue Microbial Communities in Water Environments: Dynamics and Interaction)
Nitrogen is one of the essential elements limiting growth in aquatic environments. Being primarily of anthropogenic origin, it exerts negative impacts on freshwater ecosystems. The present study was carried out at the nitrate-vulnerable zone within the alluvial aquifer of the large lowland Drava River. The main aim was to investigate the ecosystem’s functionality by characterizing the bacterial and phytoplankton diversity of a small inactive gravel pit by using interdisciplinary approaches. The phytoplankton community was investigated via traditional microscopy analyses and environmental DNA (eDNA) metabarcoding, while the bacterial community was investigated by a molecular approach (eDNA). Variations in the algal and bacterial community structure indicated a strong correlation with nitrogen compounds. Summer samples were characterized by a high abundance of bloom-forming Cyanobacteria. Following the cyanobacterial breakdown in the colder winter period, Bacillariophyceae and Actinobacteriota became dominant groups. Changes in microbial composition indicated a strong correlation between N forms and algal and bacterial communities. According to the nitrogen dynamics in the alluvial aquifer, we emphasize the importance of small water bodies as potential buffer zones to anthropogenic nitrogen pressures and sentinels of the disturbances displayed as algal blooms within larger freshwater systems. View Full-Text
Keywords: nitrogen; alluvial aquifer; large river; small water body; phytoplankton; bacterial community nitrogen; alluvial aquifer; large river; small water body; phytoplankton; bacterial community
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MDPI and ACS Style

Kulaš, A.; Marković, T.; Žutinić, P.; Kajan, K.; Karlović, I.; Orlić, S.; Keskin, E.; Filipović, V.; Gligora Udovič, M. Succession of Microbial Community in a Small Water Body within the Alluvial Aquifer of a Large River. Water 2021, 13, 115. https://doi.org/10.3390/w13020115

AMA Style

Kulaš A, Marković T, Žutinić P, Kajan K, Karlović I, Orlić S, Keskin E, Filipović V, Gligora Udovič M. Succession of Microbial Community in a Small Water Body within the Alluvial Aquifer of a Large River. Water. 2021; 13(2):115. https://doi.org/10.3390/w13020115

Chicago/Turabian Style

Kulaš, Antonija; Marković, Tamara; Žutinić, Petar; Kajan, Katarina; Karlović, Igor; Orlić, Sandi; Keskin, Emre; Filipović, Vilim; Gligora Udovič, Marija. 2021. "Succession of Microbial Community in a Small Water Body within the Alluvial Aquifer of a Large River" Water 13, no. 2: 115. https://doi.org/10.3390/w13020115

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