Spatio-temporal insights into microbiology of the freshwater-to-hypersaline, oxic-hypoxic-euxinic waters of Ursu Lake
| Autor: | Karina Paula Battes, Horia L. Banciu, Adrian-Ștefan Andrei, Mircea Alexe, Jessica Edwards, William K. O’Neill, Cecilia Chiriac, Erika Andrea Levei, Vasile Muntean, Cosmin Sicora, Adorján Cristea, Paul-Adrian Bulzu, Andreea Baricz, Cristian Coman, Mirela Cîmpean, Marin Șenilă, David Blain, Artur Ionescu, Oana Cadar, Edina Szekeres, John E. Hallsworth |
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| Přispěvatelé: | University of Zurich, Hallsworth, John Edward, Banciu, Horia Leonard |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Water mass
Heterotroph Halocline Sodium Chloride Biology 580 Plants (Botany) Microbiology 03 medical and health sciences Water column 10126 Department of Plant and Microbial Biology Ecology Evolution Behavior and Systematics SDG 15 - Life on Land 030304 developmental biology 0303 health sciences Bacteria 030306 microbiology Ecology 2404 Microbiology Annual cycle Anoxic waters Lakes 1105 Ecology Evolution Behavior and Systematics Species richness Water Microbiology Sulfur Stratum |
| Zdroj: | Baricz, A, Chiriac, C M, Andrei, A-Ș, Bulzu, P-A, Levei, E A, Cadar, O, Battes, K P, Cîmpean, M, Șenila, M, Cristea, A, Muntean, V, Alexe, M, Coman, C, Szekeres, E K, Sicora, C I, Ionescu, A, Blain, D, O’Neill, W K, Edwards, J, Hallsworth, J E & Banciu, H L 2020, ' Spatio-temporal insights into microbiology of the freshwater-to-hypersaline, oxic-hypoxic-euxinic waters of Ursu Lake ', Environmental Microbiology . https://doi.org/10.1111/1462-2920.14909, https://doi.org/10.1111/1462-2920.14909 |
| Popis: | Ursu Lake is located in the Middle Miocene salt deposit of Central Romania. It is stratified, and the water column has three distinct water masses: an upper freshwater-to-moderately saline stratum (0-3 m), an intermediate stratum exhibiting a steep halocline (3-3.5 m), and a lower hypersaline stratum (4 m and below) that is euxinic (i.e. anoxic and sulphidic). Recent studies have characterized the lake's microbial taxonomy and given rise to intriguing ecological questions. Here, we explore whether the communities are dynamic or stable in relation to taxonomic composition, geochemistry, biophysics, and ecophysiological functions during the annual cycle. We found: (i) seasonally fluctuating, light-dependent communities in the upper layer (≥0.987-0.990 water-activity), a stable but phylogenetically diverse population of heterotrophs in the hypersaline stratum (water activities down to 0.762) and a persistent plate of green sulphur bacteria that connects these two (0.958-0.956 water activity) at 3-3.5 to 4 m; (ii) communities that might be involved in carbon- and sulphur-cycling between and within the lake's three main water masses; (iii) uncultured lineages including Acetothermia (OP1), Cloacimonetes (WWE1), Marinimicrobia (SAR406), Omnitrophicaeota (OP3), Parcubacteria (OD1) and other Candidate Phyla Radiation bacteria, and SR1 in the hypersaline stratum (likely involved in the anaerobic steps of carbon- and sulphur-cycling); and (iv) that species richness and habitat stability are associated with high redox-potentials. Ursu Lake has a unique and complex ecology, at the same time exhibiting dynamic fluctuations and stability, and can be used as a modern analogue for ancient euxinic water bodies and comparator system for other stratified hypersaline systems. |
| Databáze: | OpenAIRE |
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