Eutrophication as a driver of microbial community structure in lake sediments

Xingguo Han; Carsten Johnny Schubert; Annika Fiskal; Nathalie Dubois; Mark Alexander Lever

doi:10.1111/1462-2920.15115

Eutrophication as a driver of microbial community structure in lake sediments

Xingguo Han, Carsten Johnny Schubert, Annika Fiskal, Nathalie Dubois, Mark Alexander Lever^*

^*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

52 Citationer (Scopus)

Abstract

Lake sediments are globally important carbon sinks. Although the fate of organic carbon in lake sediments depends significantly on microorganisms, only few studies have investigated controls on lake sedimentary microbial communities. Here we investigate the impact of anthropogenic eutrophication, which affects redox chemistry and organic matter (OM) sources in sediments, on microbial communities across five lakes in central Switzerland. Lipid biomarkers and distributions of microbial respiration reactions indicate strong increases in aquatic OM contributions and microbial activity with increasing trophic state. Across all lakes, 16S rRNA genes analyses indicate similar depth-dependent zonations at the phylum- and class-level that follow vertical distributions of OM sources and respiration reactions. Yet, there are notable differences, such as higher abundances of nitrifying Bacteria and Archaea in an oligotrophic lake. Furthermore, analyses at the order-level and below suggest that changes in OM sources due to eutrophication cause permanent changes in bacterial community structure. By contrast, archaeal communities are differentiated according to trophic state in recently deposited layers, but converge in older sediments deposited under different trophic regimes. Our study indicates an important role for trophic state in driving lacustrine sediment microbial communities and reveals fundamental differences in the temporal responses of sediment Bacteria and Archaea to eutrophication.

Originalsprog	Engelsk
Tidsskrift	Environmental Microbiology
Vol/bind	22
Nummer	8
Sider (fra-til)	3446-3462
Antal sider	17
ISSN	1462-2912
DOI	https://doi.org/10.1111/1462-2920.15115
Status	Udgivet - 1 aug. 2020
Udgivet eksternt	Ja

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10.1111/1462-2920.15115

Citationsformater

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title = "Eutrophication as a driver of microbial community structure in lake sediments",

abstract = "Lake sediments are globally important carbon sinks. Although the fate of organic carbon in lake sediments depends significantly on microorganisms, only few studies have investigated controls on lake sedimentary microbial communities. Here we investigate the impact of anthropogenic eutrophication, which affects redox chemistry and organic matter (OM) sources in sediments, on microbial communities across five lakes in central Switzerland. Lipid biomarkers and distributions of microbial respiration reactions indicate strong increases in aquatic OM contributions and microbial activity with increasing trophic state. Across all lakes, 16S rRNA genes analyses indicate similar depth-dependent zonations at the phylum- and class-level that follow vertical distributions of OM sources and respiration reactions. Yet, there are notable differences, such as higher abundances of nitrifying Bacteria and Archaea in an oligotrophic lake. Furthermore, analyses at the order-level and below suggest that changes in OM sources due to eutrophication cause permanent changes in bacterial community structure. By contrast, archaeal communities are differentiated according to trophic state in recently deposited layers, but converge in older sediments deposited under different trophic regimes. Our study indicates an important role for trophic state in driving lacustrine sediment microbial communities and reveals fundamental differences in the temporal responses of sediment Bacteria and Archaea to eutrophication.",

author = "Xingguo Han and Schubert, {Carsten Johnny} and Annika Fiskal and Nathalie Dubois and Lever, {Mark Alexander}",

note = "Funding Information: We thank Anja Michel, Longhui Deng, Philip Eickenbusch, Lorenzo Lagostina and Rong Zhu for their help with field sampling, and the Genetic Diversity Centre of ETH Zurich for molecular biological, sequencing and bioinformatic support. We thank Serge Robert for helping with the extraction and measurement of biomarkers at Eawag. Xingguo Han was sponsored by Chinese Scholarship Council Grant No. 201606320219. The overall project is funded by Swiss National Science Foundation Project No. 205321_163371 to M.A.L. Publisher Copyright: {\textcopyright} 2020 Society for Applied Microbiology and John Wiley & Sons Ltd. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2020",

month = aug,

day = "1",

doi = "10.1111/1462-2920.15115",

language = "English",

volume = "22",

pages = "3446--3462",

journal = "Environmental Microbiology",

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T1 - Eutrophication as a driver of microbial community structure in lake sediments

AU - Han, Xingguo

AU - Schubert, Carsten Johnny

AU - Fiskal, Annika

AU - Dubois, Nathalie

AU - Lever, Mark Alexander

N1 - Funding Information: We thank Anja Michel, Longhui Deng, Philip Eickenbusch, Lorenzo Lagostina and Rong Zhu for their help with field sampling, and the Genetic Diversity Centre of ETH Zurich for molecular biological, sequencing and bioinformatic support. We thank Serge Robert for helping with the extraction and measurement of biomarkers at Eawag. Xingguo Han was sponsored by Chinese Scholarship Council Grant No. 201606320219. The overall project is funded by Swiss National Science Foundation Project No. 205321_163371 to M.A.L. Publisher Copyright: © 2020 Society for Applied Microbiology and John Wiley & Sons Ltd. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/8/1

Y1 - 2020/8/1

N2 - Lake sediments are globally important carbon sinks. Although the fate of organic carbon in lake sediments depends significantly on microorganisms, only few studies have investigated controls on lake sedimentary microbial communities. Here we investigate the impact of anthropogenic eutrophication, which affects redox chemistry and organic matter (OM) sources in sediments, on microbial communities across five lakes in central Switzerland. Lipid biomarkers and distributions of microbial respiration reactions indicate strong increases in aquatic OM contributions and microbial activity with increasing trophic state. Across all lakes, 16S rRNA genes analyses indicate similar depth-dependent zonations at the phylum- and class-level that follow vertical distributions of OM sources and respiration reactions. Yet, there are notable differences, such as higher abundances of nitrifying Bacteria and Archaea in an oligotrophic lake. Furthermore, analyses at the order-level and below suggest that changes in OM sources due to eutrophication cause permanent changes in bacterial community structure. By contrast, archaeal communities are differentiated according to trophic state in recently deposited layers, but converge in older sediments deposited under different trophic regimes. Our study indicates an important role for trophic state in driving lacustrine sediment microbial communities and reveals fundamental differences in the temporal responses of sediment Bacteria and Archaea to eutrophication.

AB - Lake sediments are globally important carbon sinks. Although the fate of organic carbon in lake sediments depends significantly on microorganisms, only few studies have investigated controls on lake sedimentary microbial communities. Here we investigate the impact of anthropogenic eutrophication, which affects redox chemistry and organic matter (OM) sources in sediments, on microbial communities across five lakes in central Switzerland. Lipid biomarkers and distributions of microbial respiration reactions indicate strong increases in aquatic OM contributions and microbial activity with increasing trophic state. Across all lakes, 16S rRNA genes analyses indicate similar depth-dependent zonations at the phylum- and class-level that follow vertical distributions of OM sources and respiration reactions. Yet, there are notable differences, such as higher abundances of nitrifying Bacteria and Archaea in an oligotrophic lake. Furthermore, analyses at the order-level and below suggest that changes in OM sources due to eutrophication cause permanent changes in bacterial community structure. By contrast, archaeal communities are differentiated according to trophic state in recently deposited layers, but converge in older sediments deposited under different trophic regimes. Our study indicates an important role for trophic state in driving lacustrine sediment microbial communities and reveals fundamental differences in the temporal responses of sediment Bacteria and Archaea to eutrophication.

U2 - 10.1111/1462-2920.15115

DO - 10.1111/1462-2920.15115

M3 - Journal article

C2 - 32510812

AN - SCOPUS:85087302756

SN - 1462-2912

VL - 22

SP - 3446

EP - 3462

JO - Environmental Microbiology

JF - Environmental Microbiology

IS - 8

ER -

Eutrophication as a driver of microbial community structure in lake sediments

Abstract

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