Seasonal and spatial dynamics of bacterioplankton communities in a brackish water coastal lagoon

Mohapatra, Madhusmita Mohanty; Behera, Pratiksha; Kim, Ji Yoon; Rastogi, Gurdeep

doi:10.1016/j.scitotenv.2019.134729

Cited by 40 publications

(11 citation statements)

References 54 publications

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“…Cyanobacteria were the most abundant and diverse taxonomic group in a set of neutral mine pit lakes in Poland (pH 8) [57]. Actinobacteria (CL500-29 marine group_uncultured bacterium and hgcI clade) co-cycled in microbial planktonic communities in our study lakes; a pattern that has been previously documented in Polish lakes artificially heated with power plant discharge [58], in mesocosms [59], in the Baltic Sea [60], in an Indian brackish lagoon [61], a sewage-affected river in China [62] and a variety of other aquatic habitats both natural and artificial [63][64][65]. It is unclear why these two particular taxa co-dominate assemblages and cycled together over time and did so under such a wide variety of conditions in many different aquatic habitats.…”

Section: Discussionsupporting

confidence: 73%

Aquatic Ecosystems of the Anthropocene: Limnology and Microbial Ecology of Mine Pit Lakes

Blanchette

Lund

2021

Microorganisms

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Mine pit lakes (‘pit lakes’) are new aquatic ecosystems of the Anthropocene. Potentially hundreds of meters deep, these lakes are prominent in the landscape and in the public consciousness. However, the ecology of pit lakes is underrepresented in the literature. The broad goal of this research was to determine the environmental drivers of pelagic microbe assemblages in Australian coal pit lakes. The overall experimental design was four lakes sampled three times, top and bottom, in 2019. Instrument chains were installed in lakes and measurements of in situ water quality and water samples for metals, metalloids, nutrients and microbe assemblage were collected. Lakes were monomictic and the timing of mixing was influenced by high rainfall events. Water quality and microbial assemblages varied significantly across space and time, and most taxa were rare. Lakes were moderately saline and circumneutral; Archeans were not prevalent. Richness also varied by catchment. Microbial assemblages correlated to environmental variables, and no one variable was consistently significant, spatially or temporally. Study lakes were dominated by ‘core’ taxa exhibiting temporal turnover likely driven by geography, water quality and interspecific competition, and the presence of water chemistry associated with an artificial aquifer likely influenced microbial community composition. Pit lakes are deceptively complex aquatic ecosystems that host equally complex pelagic microbial communities. This research established links between microbial assemblages and environmental variables in pit lakes and determined core communities; the first steps towards developing a monitoring program using microbes.

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Section: Discussionsupporting

confidence: 73%

Aquatic Ecosystems of the Anthropocene: Limnology and Microbial Ecology of Mine Pit Lakes

Blanchette

Lund

2021

Microorganisms

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“…The number of in situ phytoplankton species (129) identified by microscopy was in the same order of magnitude as that observed in similar Mediterranean ecosystems (Draredja et al, 2019;Percopo et al, 2011) or in other coastal regions (Srichandan et al, 2019) using the same counting technique. Similarly, the number of OTUs (19 169 for the in situ database) estimated by the 16S rRNA gene considered as a proxy of the bacterioplankton richness, was comparable to bacterial specific richness estimates determined with similar molecular tools in other coastal ecosystems (Goni-Urriza et al, 2018;Mohapatra et al, 2020). As generally observed in Mediterranean coastal ecosystems (Pulina et al, 2018;Quero et al, 2017), phytoplankton and bacterioplankton diversity exhibited clear seasonal variations in lagoon and offshore waters.…”

Section: In Situ Phytoplankton and Bacterioplankton Diversitysupporting

confidence: 77%

Chemical contamination alters the interactions between bacteria and phytoplankton

et al. 2021

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Bacteria and phytoplankton are key players in aquatic ecosystem functioning. Their interactions mediate carbon transfer through the trophic web. Chemical contamination can alter the function and diversity of phytoplankton and bacterioplankton, with important consequences for ecosystem functioning. The aim of the present study was to assess the impact of chemical contamination on the interactions between both biological compartments. Two contrasting marine coastal ecosystems, offshore waters and lagoon waters, were exposed to chemical contamination (artificial or produced from resuspension of contaminated sediment) in microcosms in four seasons characterized by distinct phytoplankton communities. Offshore waters were characterized by a complex phytoplankton-bacterioplankton network with a predominance of positive interactions between both compartments, especially with Haptophyta, Cryptophyta, and dinoflagellates. In contrast, for lagoon waters, the phytoplankton-bacterioplankton network was simpler with a prevalence of negative interactions with Ochrophyta, Cryptophyta, and flagellates. Contamination with an artificial mix of pesticides and trace metal elements resulted in a decrease in the number of interactions between phytoplankton and bacterioplankton, especially for offshore waters. Resuspension of contaminated sediment also altered the interactions between both compartments. The release of nutrients stored in the sediment allowed the growth of nutrient limited phytoplankton species with marked consequences for the interactions with bacterioplankton, with a predominance of positive interactions, whereas in lagoon waters, negative interactions were mostly observed. Overall, this study showed that chemical contamination and sediment resuspension resulted in significant effects on phytoplankton-bacterioplankton interactions that can alter the functioning of anthropogenic coastal ecosystems.

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“…It is a selenoid-shaped photoheterotroph organism, consisting of actinorhodopsin molecules for light energy transduction. After the first isolation, "Candidatus Aquiluna" members were identified in Arctic sea waters, and brackish ice brine [52][53][54][55] and Indian brackish coastal waters [56]. Notably, "Candidatus Aquiluna" was identified as the dominant phylotype in brackish ice brine, which has a lower salinity than immediate sub-ice seawater [55].…”

Section: Taxonomic Profilesmentioning

confidence: 99%

A Differential Metabarcoding Approach to Describe Taxonomy Profiles of Bacteria and Archaea in the Saltern of Margherita di Savoia (Italy)

et al. 2020

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Microorganisms inhabiting saline environments are an interesting ecological model for the study of the adaptation of organisms to extreme living conditions and constitute a precious resource of enzymes and bioproducts for biotechnological applications. We analyzed the microbial communities in nine ponds with increasing salt concentrations (salinity range 4.9–36.0%) of the Saltern of Margherita di Savoia (Italy), the largest thalassohaline saltern in Europe. A deep-metabarcoding NGS procedure addressing separately the V5-V6 and V3-V4 hypervariable regions of the 16S rRNA gene of Bacteria and Archaea, respectively, and a CARD-FISH (catalyzed reporter deposition fluorescence in situ hybridization) analysis allowed us to profile the dynamics of microbial populations at the different salt concentrations. Both the domains were detected throughout the saltern, even if the low relative abundance of Archaea in the three ponds with the lowest salinities prevented the construction of the relative amplicon libraries. The highest cell counts were recorded at 14.5% salinity for Bacteria and at 24.1% salinity for Archaea. While Bacteria showed the greatest number of genera in the first ponds (salinity range 4.9–14.5%), archaeal genera were more numerous in the last ponds of the saltern (salinity 24.1–36.0%). Among prokaryotes, Salinibacter was the genus with the maximum abundance (~49% at 34.6% salinity). Other genera detected at high abundance were the archaeal Haloquadratum (~43% at 36.0% salinity) and Natronomonas (~18% at 13.1% salinity) and the bacterial “Candidatus Aquiluna” (~19% at 14.5% salinity). Interestingly, “Candidatus Aquiluna” had not been identified before in thalassohaline waters.

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Seasonal and spatial dynamics of bacterioplankton communities in a brackish water coastal lagoon

Cited by 40 publications

References 54 publications

Aquatic Ecosystems of the Anthropocene: Limnology and Microbial Ecology of Mine Pit Lakes

Aquatic Ecosystems of the Anthropocene: Limnology and Microbial Ecology of Mine Pit Lakes

Chemical contamination alters the interactions between bacteria and phytoplankton

A Differential Metabarcoding Approach to Describe Taxonomy Profiles of Bacteria and Archaea in the Saltern of Margherita di Savoia (Italy)

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