date: 2024-02-23T08:40:02Z
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pdf:docinfo:title: Microbial assemblages in Arctic coastal thermokarst lakes and lagoons
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subject: DOI: 10.1093/femsec/fiae014 FEMS Microbiology Ecology, 100, 3, 2-2-2024. Abstract: Several studies have investigated changes in microbial community composition in thawing permafrost landscapes, but microbial assemblages in the transient ecosystems of the Arctic coastline remain poorly understood. Thermokarst lakes, abrupt permafrost thaw features, are widespread along the pan-Arctic coast and transform into thermokarst lagoons upon coastal erosion and sea-level rise. This study looks at the effect of marine water inundation (imposing a sulfate-rich, saline environment on top of former thermokarst lake sediments) on microbial community composition and the processes potentially driving microbial community assembly. In the uppermost lagoon sediment influenced from marine water inflow, the microbial structures were significantly different from those deeper in the lagoon sediment and from those of the lakes. In addition, they became more similar along depth compared with lake communities. At the same time, the diversity of core microbial consortia community decreased compared with the lake sediments. This work provides initial observational evidence that Arctic thermokarst lake to lagoon transitions do not only substantially alter microbial communities but also that this transition has a larger effect than permafrost thaw and lake formation history.
dc:creator: Yang Sizhong, Wen Xi, Wagner Dirk, Strauss Jens, Kallmeyer Jens, Anthony Sara E., Liebner Susanne
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title: Microbial assemblages in Arctic coastal thermokarst lakes and lagoons
Last-Save-Date: 2024-02-23T08:40:02Z
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dc:title: Microbial assemblages in Arctic coastal thermokarst lakes and lagoons
modified: 2024-02-23T08:40:02Z
cp:subject: DOI: 10.1093/femsec/fiae014 FEMS Microbiology Ecology, 100, 3, 2-2-2024. Abstract: Several studies have investigated changes in microbial community composition in thawing permafrost landscapes, but microbial assemblages in the transient ecosystems of the Arctic coastline remain poorly understood. Thermokarst lakes, abrupt permafrost thaw features, are widespread along the pan-Arctic coast and transform into thermokarst lagoons upon coastal erosion and sea-level rise. This study looks at the effect of marine water inundation (imposing a sulfate-rich, saline environment on top of former thermokarst lake sediments) on microbial community composition and the processes potentially driving microbial community assembly. In the uppermost lagoon sediment influenced from marine water inflow, the microbial structures were significantly different from those deeper in the lagoon sediment and from those of the lakes. In addition, they became more similar along depth compared with lake communities. At the same time, the diversity of core microbial consortia community decreased compared with the lake sediments. This work provides initial observational evidence that Arctic thermokarst lake to lagoon transitions do not only substantially alter microbial communities but also that this transition has a larger effect than permafrost thaw and lake formation history.
pdf:docinfo:subject: DOI: 10.1093/femsec/fiae014 FEMS Microbiology Ecology, 100, 3, 2-2-2024. Abstract: Several studies have investigated changes in microbial community composition in thawing permafrost landscapes, but microbial assemblages in the transient ecosystems of the Arctic coastline remain poorly understood. Thermokarst lakes, abrupt permafrost thaw features, are widespread along the pan-Arctic coast and transform into thermokarst lagoons upon coastal erosion and sea-level rise. This study looks at the effect of marine water inundation (imposing a sulfate-rich, saline environment on top of former thermokarst lake sediments) on microbial community composition and the processes potentially driving microbial community assembly. In the uppermost lagoon sediment influenced from marine water inflow, the microbial structures were significantly different from those deeper in the lagoon sediment and from those of the lakes. In addition, they became more similar along depth compared with lake communities. At the same time, the diversity of core microbial consortia community decreased compared with the lake sediments. This work provides initial observational evidence that Arctic thermokarst lake to lagoon transitions do not only substantially alter microbial communities but also that this transition has a larger effect than permafrost thaw and lake formation history.
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pdf:docinfo:creator: Yang Sizhong, Wen Xi, Wagner Dirk, Strauss Jens, Kallmeyer Jens, Anthony Sara E., Liebner Susanne
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Author: Yang Sizhong, Wen Xi, Wagner Dirk, Strauss Jens, Kallmeyer Jens, Anthony Sara E., Liebner Susanne
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pdf:docinfo:producer: Acrobat Distiller 23.0 (Windows); modified using iTextSharp 5.5.10 ©2000-2016 iText Group NV (AGPL-version)
pdf:docinfo:created: 2024-02-22T08:26:33Z
doi: 10.1093/femsec/fiae014